Cable oil detection device

Abstract

The application relates to a submarine cable oil detection device which comprises a sample feeding mechanism, an emulsification mechanism and a detection mechanism, wherein the emulsification mechanism comprises an emulsification cavity and an ultrasonic vibration component, the ultrasonic vibration component extends into the emulsification cavity, the emulsification cavity is provided with an emulsification liquid inlet and an emulsification liquid outlet which are communicated, the emulsification liquid inlet is communicated with the sample feeding mechanism, and the emulsification liquid outlet is communicated with the detection mechanism. The submarine cable oil detection device is provided with the sample feeding mechanism which is used for inputting liquid to be detected, such as seawater, and the emulsification mechanism which comprises the emulsification cavity and the ultrasonic vibration component. When the liquid is input into the emulsification cavity, cavitation is generated on the liquid through the vibration of the ultrasonic vibration component, the alkyl benzene insulating oil in the water is uniformly emulsified, and subsequent accurate detection is realized.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a submarine cable oil testing device. Background Technology

[0002] Oil-filled cables are a type of power cable that uses additional impregnating agent to eliminate air gaps in the oil-paper insulation layer caused by load changes, thereby improving the cable's operating field strength. Traditional impregnating agents are mainly low-viscosity mineral oils, but they are gradually being replaced by alkylbenzene insulating oils, which have better low-temperature characteristics, gas release properties, and kinematic viscosity.

[0003] In extreme cases, oil-filled submarine cables may be damaged by external forces, leading to large-scale leakage of the alkylbenzene insulating oil inside the cable, damaging the ecological environment and causing power transmission and transformation accidents. When an oil leak occurs, it is necessary to locate the leak point, especially in the initial stage before a large-scale leak occurs, to prevent further leakage. However, in the initial stage before a large-scale leak, the insulating oil content in seawater is low, therefore, it is necessary to improve the detection accuracy of the detection equipment. Summary of the Invention

[0004] Therefore, it is necessary to provide a submarine cable oil detection device to improve the detection accuracy of the device.

[0005] A submarine cable oil detection device includes a sample injection mechanism, an emulsification mechanism, and a detection mechanism. The emulsification mechanism has an emulsification chamber and an ultrasonic vibration component. The ultrasonic vibration component extends into the emulsification chamber. The emulsification chamber has a connected emulsification inlet and an emulsification outlet. The emulsification inlet is connected to the sample injection mechanism, and the emulsification outlet is connected to the detection mechanism.

[0006] In one embodiment, the sample injection mechanism includes a sample injection tube, a rinsing fluid tube, a liquid injection tube, and a liquid injection pump. The sample injection tube and the rinsing fluid tube are respectively connected to the liquid injection tube, the liquid injection tube is connected to the emulsion inlet, and the liquid injection pump is disposed on the liquid injection tube.

[0007] In one embodiment, the injection mechanism further includes an injection three-way valve, and the injection tube and the flushing fluid tube are connected to the inlet tube through the injection three-way valve.

[0008] In one embodiment, the sample injection mechanism further includes an air inlet pipe connected to the liquid inlet pipe, wherein the connection point of the air inlet pipe is located upstream of the liquid inlet pump in the liquid inlet direction.

[0009] In one embodiment, the sample injection mechanism further includes an air inlet three-way valve, and the air inlet pipe is connected to the liquid inlet pipe through the air inlet three-way valve.

[0010] In one embodiment, the ultrasonic vibration component is an ultrasonic vibrator.

[0011] In one embodiment, the emulsification mechanism further includes a hydrophobic and oleophobic breathable membrane, a degassing chamber, and a vacuum pump. The degassing chamber is connected to the emulsification chamber and separated from it by the hydrophobic and oleophobic breathable membrane. The vacuum pump is connected to the degassing chamber.

[0012] In one embodiment, the emulsifying mechanism further includes a support mesh, on which the hydrophobic, oleophobic, and breathable membrane is disposed and located below the support mesh.

[0013] In one embodiment, the emulsification mechanism further includes a pressure sensor for detecting the pressure in the degassing chamber.

[0014] In one embodiment, the emulsification mechanism further includes a first liquid level sensor, the probe of which is located near the lower side of the hydrophobic, oleophobic, and breathable membrane.

[0015] In one embodiment, the emulsification mechanism further includes a second liquid level sensor, the probe of which is located in the emulsification chamber and below the first liquid level sensor.

[0016] In one embodiment, the submarine cable oil detection device further includes a drain pipe, the detection mechanism has a detection container, the detection container has a detection inlet and a detection outlet connected together, the detection inlet is connected to the emulsion outlet, and the detection outlet is connected to the drain pipe.

[0017] In one embodiment, the submarine cable oil detection device further includes a first distribution pipe, a second distribution pipe, a third distribution pipe, a distribution three-way valve, a first three-way valve, and a second three-way valve. The first distribution pipe is connected to the emulsion outlet. The first distribution pipe, the second distribution pipe, and the third distribution pipe are connected through the distribution three-way valve. The second distribution pipe, the detection inlet, and the drain pipe are connected through the first three-way valve. The third distribution pipe and the drain pipe are connected through the second three-way valve.

[0018] Compared with traditional methods, the above-mentioned submarine cable oil detection device has the following advantages:

[0019] The aforementioned submarine cable oil testing device is equipped with a sample inlet mechanism for inputting the liquid to be tested, such as seawater, and an emulsification mechanism, which includes an emulsification chamber and an ultrasonic vibration component. When the liquid is input into the emulsification chamber, the vibration of the ultrasonic vibration component generates cavitation in the liquid, causing the alkylbenzene insulating oil in the water to be emulsified uniformly, thereby achieving accurate subsequent testing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a submarine cable oil detection device according to an embodiment;

[0021] Figure 2 for Figure 1 A schematic diagram of the emulsification mechanism in the submarine cable oil detection device shown.

[0022] Figure 3 for Figure 1 A cross-sectional view of the emulsification mechanism in the submarine cable oil detection device shown.

[0023] Figure 4 for Figure 1 A schematic diagram of the detection mechanism in the shown submarine cable oil detection device;

[0024] Figure 5 for Figure 1 An exploded view of the detection mechanism in the submarine cable oil detection device shown.

[0025] Figure 6 for Figure 1 A cross-sectional view of the detection mechanism in the shown submarine cable oil detection device;

[0026] Figure 7 for Figure 1 The diagram shows the structure of the fluorescence acquisition component, fluorescence detection component, and fluorescence transmission component in the submarine cable oil detection device.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Submarine cable oil detection device; 100. Sample injection mechanism; 110. Sample injection tube; 120. Rinse fluid tube; 130. Liquid inlet tube; 140. Liquid inlet pump; 150. Sample injection three-way valve; 160. Air inlet tube; 170. Air inlet three-way valve; 200. Emulsification mechanism; 210. Emulsification chamber; 211. Emulsification inlet; 212. Emulsification outlet; 220. Ultrasonic vibration component; 230. Hydrophobic and oleophobic breathable membrane; 240. Degassing chamber; 241. Degassing connector; 251. Air pump; 252. Degassing tube; 253. Degassing valve; 260. Support net; 270. Pressure sensor; 280. First liquid level sensor; 290. Second liquid level sensor; 300. Detection mechanism; 310. Detection container; 311. Detection of inlet; 312, Detection of outlet; 320, First light source; 330, Second light source; 340, Fluorescence acquisition component; 341, Collimating lens; 342, Reflector; 350, Mounting base; 351, Receiving cavity; 352, Insertion hole; 360, Reflector bracket; 370, Fluorescence transmission component; 371, Optical fiber; 372, Entrance slit; 373, Collimating lens; 374, Grating; 375, Focusing lens; 380, Fluorescence detection component; 381, Area array detector; 400, Drain pipe; 500, First distribution pipe; 600, Second distribution pipe; 700, Third distribution pipe; 800, Distribution three-way valve; 900, First three-way valve; 1000, Second three-way valve; 1100, Synchronization signal generator. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Please refer to Figures 1 to 3 As shown, a submarine cable oil detection device 10 according to an embodiment of the present invention includes a sample injection mechanism 100, an emulsification mechanism 200, and a detection mechanism 300.

[0035] The emulsification mechanism 200 includes an emulsification chamber 210 and an ultrasonic vibration component 220. The ultrasonic vibration component 220 extends into the emulsification chamber 210. The emulsification chamber 210 has a communicating emulsification inlet 211 and an emulsification outlet 212. The emulsification inlet 211 is connected to the sample injection mechanism 100, and the emulsification outlet 212 is connected to the detection mechanism 300.

[0036] The aforementioned submarine cable oil detection device 10 is equipped with a sample inlet mechanism 100 for inputting the liquid to be tested, such as seawater, and an emulsification mechanism 200, which includes an emulsification chamber 210 and an ultrasonic vibration component 220. When the liquid is input into the emulsification chamber 210, the vibration of the ultrasonic vibration component 220 generates cavitation in the liquid, making the alkylbenzene insulating oil in the water emulsified uniformly, thereby achieving accurate subsequent detection.

[0037] In one example, the sample introduction mechanism 100 includes a sample introduction tube 110, a rinsing fluid tube 120, a liquid introduction tube 130, and a liquid introduction pump 140. The sample introduction tube 110 and the rinsing fluid tube 120 are respectively connected to the liquid introduction tube 130, which is connected to the emulsification mechanism 200. The liquid introduction pump 140 is mounted on the liquid introduction tube 130. The sample introduction tube 110 can extend into the seawater at the detection location to introduce seawater. The rinsing fluid tube 120 is used to introduce rinsing solvent, thereby achieving rinsing. Under the pumping of the liquid introduction pump 140, the seawater and rinsing solvent are introduced, mixed, and delivered to the emulsification mechanism 200 via the liquid introduction tube 130.

[0038] In one example, the injection tube 110 is connected to a float, such as a float (not shown), to achieve buoyancy.

[0039] In one example, a filter screen (not shown) is provided in the injection tube 110, for example at the liquid inlet end, to prevent impurities from entering.

[0040] Furthermore, in one example, the injection mechanism 100 also includes an injection three-way valve 150. The injection tube 110 and the flushing fluid tube 120 are connected to the inlet tube 130 via the injection three-way valve 150.

[0041] In this invention, the two inlets and outlets that are arranged opposite to each other in the three-way valve are called port b and port c, respectively, and the inlet and outlet located between port b and port c is called port a.

[0042] exist Figure 1 In the specific example shown, the sample inlet tube 110 and the rinsing fluid tube 120 are connected to ports b and c of the sample inlet three-way valve 150, respectively, and the liquid inlet tube 130 is connected to port a of the sample inlet three-way valve 150.

[0043] In one example, the sample introduction mechanism 100 also includes an air inlet pipe 160. The air inlet pipe 160 is connected to the liquid inlet pipe 130, and the connection point of the air inlet pipe 160 is located upstream of the liquid inlet pump 140 in the liquid inlet direction of the liquid inlet pipe 130. The air inlet pipe 160 is used to introduce air when the device is emptied.

[0044] Optionally, the sample injection mechanism 100 also includes an air inlet three-way valve 170. The air inlet pipe 160 is connected to the liquid inlet pipe 130 through the air inlet three-way valve 170.

[0045] exist Figure 1 In the specific example shown, the intake pipe 160 is connected to port a of the intake three-way valve 170, and ports b and c of the intake three-way valve 170 are both connected to the liquid inlet pipe 130.

[0046] like Figure 2 and Figure 3As shown, in one example, the emulsification mechanism 200 includes an emulsification chamber 210 and an ultrasonic vibrator. The ultrasonic vibrator extends into the emulsification chamber 210. The emulsification chamber 210 has a communicating emulsification inlet 211 and an emulsification outlet 212, the emulsification inlet 211 being connected to an inlet pipe 130, and the emulsification outlet 212 being connected to a detection mechanism 300.

[0047] The cavitation effect of the liquid caused by the vibration of the ultrasonic transducer emulsifies the alkylbenzene insulating oil in the water, thereby enabling accurate subsequent detection.

[0048] In one example, the emulsification mechanism 200 further includes a hydrophobic and oleophobic breathable membrane 230, a degassing chamber 240, and a vacuum pump 251. The degassing chamber 240 is connected to the emulsification chamber 210 and separated from it by the hydrophobic and oleophobic breathable membrane 230. The vacuum pump 251 is connected to the degassing chamber 240.

[0049] It is understood that the vacuum pump 251 is connected to the degassing chamber 240 via the degassing pipe 252. Furthermore, in one example, the emulsification mechanism 200 also includes a degassing valve 253, which is disposed on the degassing pipe 252. Pressure control is achieved by opening and closing the degassing valve 253, thereby maintaining a certain vacuum level within the degassing chamber 240 to facilitate the removal of gas from the seawater.

[0050] In one example, the emulsifying chamber 210 is a space extending in the horizontal direction, and the degassing chamber 240 is a space extending in the vertical direction, with the degassing chamber 240 located above the emulsifying chamber 210.

[0051] The hydrophobic and oleophobic breathable membrane 230 allows gas to pass through but not water and oil. Under the action of the air pump 251, a negative pressure is formed in the degassing chamber 240. The air discharged by the ultrasonic vibrator passes through the hydrophobic and oleophobic breathable membrane 230 into the degassing chamber 240 and is extracted by the air pump 251.

[0052] In the above example, by removing the air dissolved in the seawater, the fluorescence quenching caused by oxygen molecules in the air can be prevented, thereby improving the detection accuracy.

[0053] In one example, the emulsifying mechanism 200 also includes a support mesh 260, on which a hydrophobic and oleophobic breathable membrane 230 is disposed and located below the support mesh 260. The support mesh 260 plate supports the hydrophobic and oleophobic breathable membrane 230, preventing it from being damaged by gas agitation.

[0054] In one example, the emulsification mechanism 200 also includes a pressure sensor 270 for detecting the pressure in the degassing chamber 240.

[0055] In one example, the emulsification mechanism 200 also includes a first liquid level sensor 280, the probe of which is located near the underside of the hydrophobic and oleophobic breathable membrane 230.

[0056] In one example, the emulsification mechanism 200 also includes a second liquid level sensor 290, the probe of which is located in the emulsification chamber 210 and below the first liquid level sensor 280.

[0057] The device controls the liquid level in the emulsification chamber 210 by setting a first liquid level sensor 280 and a second liquid level sensor 290, keeping it at a reasonable position. For example, the liquid level is controlled to reach the probe of the second liquid level sensor 290, while preventing the liquid level from reaching the probe of the first liquid level sensor 280.

[0058] like Figures 4 to 6 As shown, in one example, the detection mechanism 300 includes a detection container 310, a first light source 320, a second light source 330, and a fluorescence collection component 340.

[0059] The detection container 310 is used to contain the liquid to be tested. A first light source 320 and a second light source 330 are respectively disposed on the sides of the detection container 310 so as to face into the container. The first light source 320 emits light at a wavelength of 210nm to 230nm, and the second light source 330 emits light at a wavelength of 255nm to 275nm. A fluorescence collection component 340 is used to collect the fluorescence emitted by the liquid in the detection container 310.

[0060] In the above example, the detection mechanism 300 is equipped with a detection container 310 to hold the liquid to be tested. A first light source 320 and a second light source 330 are arranged on the side of the detection container 310. The light emitted by the light sources excites the liquid to emit fluorescence, and a fluorescence collection component 340 is provided to collect the fluorescence emitted by the liquid. The first light source 320 has an emission wavelength of 210nm to 230nm, and the second light source 330 has an emission wavelength of 255nm to 275nm, which can detect alkylbenzene insulating oil and eliminate interference from diesel fuel. More specifically, through analysis of various components in seawater, the largest interfering component is diesel fuel, because the excitation spectra of diesel fuel and insulating oil samples are basically the same. By comparing the excitation spectra of the two, it was found that both diesel and alkylbenzene insulating oil have a distinct peak at around 265 nm. Diesel has a second peak at around 234 nm, while the insulating oil sample has a second peak at around 220 nm. Therefore, the alkylbenzene insulating oil was identified by setting a first light source 320 with an emission wavelength of 255 nm to 275 nm to eliminate the interference of diesel. A second light source 330 with an emission wavelength of 255 nm to 275 nm was set to quantify the alkylbenzene insulating oil.

[0061] In one example, the emission wavelength of the first light source 320 is 215 nm to 225 nm. Further, the emission wavelength of the first light source 320 is 218 nm to 222 nm. Further still, the emission wavelength of the first light source 320 is 220 nm.

[0062] The emission wavelength of the second light source 330 is 260nm to 270nm. Further, the emission wavelength of the second light source 330 is 263nm to 267nm. Further, the emission wavelength of the second light source 330 is 265nm.

[0063] It is understood that the detection container 310 has a light-transmitting window, or the detection container 310 is a transparent container, so that the light emitted by the first light source 320 and the second light source 330 can be incident, and the fluorescence emitted by the liquid can be emitted to the fluorescence collection component 340.

[0064] The detection container 310 is also connected to a detection inlet 311 and a detection outlet 312, through which the liquid to be detected can flow. In one example, the detection inlet 311 and the detection outlet 312 are connected to opposite ends of the detection container 310.

[0065] In one example, the first light source 320 and the second light source 330 are respectively positioned on opposite sides of the detection container 310.

[0066] In one example, the fluorescence acquisition component 340 includes a collimating lens 341. The collimating lens 341 can collimate and focus light rays, enabling it to better receive the fluorescence emitted by the liquid.

[0067] In one example, the fluorescence acquisition component 340 also includes a reflector 342, and the reflector 342 and the collimating lens 341 are respectively disposed on opposite sides of the detection container 310.

[0068] The fluorescence generated by the liquid enters the collimating lens 341 directly, and another part of the fluorescence is reflected by the mirror 342 and then enters the collimating lens 341, thereby increasing the amount of fluorescence entering the collimating lens 341 and improving the detection accuracy.

[0069] exist Figure 5 In the specific example shown, the detection container 310 is a cubic cavity. The reflector 342, collimating lens 341, first light source 320, and second light source 330 are located on the four sides of the cubic cavity, respectively. Preferably, the reflector 342, collimating lens 341, first light source 320, and second light source 330 are all close to the sidewalls of the detection container 310. Preferably, the reflector 342, collimating lens 341, first light source 320, and second light source 330 are at approximately the same height.

[0070] In one example, the detection mechanism 300 also includes a mounting base 350. The mounting base 350 has a receiving cavity 351 in which the detection container 310 is disposed. A first light source 320, a second light source 330, and a collimating lens 341 are respectively mounted on the mounting base 350.

[0071] In one example, the detection mechanism 300 also includes a reflector bracket 360, on which a reflector 342 is mounted. The mounting base 350 has an insertion hole 352 located on one side of the receiving cavity 351, into which the reflector bracket 360 can be inserted.

[0072] like Figure 7 As shown, in one example, the detection mechanism 300 also includes a fluorescence transmission component 370 and a fluorescence detection component 380. The fluorescence transmission component 370 is used to transmit the fluorescence collected by the fluorescence collection component 340 to the fluorescence detection component 380 for detection.

[0073] In one example, the fluorescence transmission component 370 includes an optical fiber 371, an entrance slit 372, a collimating lens 373, a grating 374, and a focusing lens 375 arranged sequentially in the fluorescence transmission direction. The fluorescence collected by the collimating lens 371 is transmitted to the entrance slit 372 through the optical fiber 371, and then split by the collimating lens 373 and the grating 374 before being focused onto the fluorescence detection component 380 by the focusing lens 375.

[0074] In one example, the fluorescence detection component 380 includes an area array detector 381. Furthermore, the fluorescence detection component 380 also includes a spectrometer, with the area array detector 381 connected to the spectrometer to detect the intensity of fluorescence at various wavelengths.

[0075] In the above example, the sampled seawater is excited by fluorescence, and then connected to a spectrometer via an area array detector to detect the intensity of fluorescence at each wavelength, thereby determining the concentration of alkylbenzene insulating oil in the seawater. This method has high sensitivity and can detect oil content at the ppm level.

[0076] The aforementioned testing institution 300 collects the fluorescence emitted by the liquid after absorbing light energy. The presence of alkylbenzene insulating oil is determined by fluorescence spectroscopy, and the alkylbenzene insulating oil is quantified by fluorescence intensity.

[0077] The fluorescence intensity of a solution (denoted as F) is related to the degree of light energy absorbed by the solution and the fluorescence frequency of the substance, as shown in the following equation (1).

[0078] F=K'(I0-I t Equation (1)

[0079] Among them, I t =I0·10 -εbcK' is a constant that depends on the quantum efficiency Φ of the fluorescent material.

[0080] According to the Lambert-Beer Law (LB Law), we can obtain the following equation (2).

[0081] F=K'(I0-I0·10 -εbc )=K'I0(1-10 -εbc )=K'I0(1-e εbc Equation (2)

[0082] In equation (2), e εbc Expanding, we get the following equation (3).

[0083]

[0084] When εbc≤0.05 (at which point the concentration is very small and the solution is dilute), all terms after the first term in the parentheses of equation (3) can be ignored, and equation (4) can be obtained.

[0085] F=K'I0εbc Equation (4)

[0086] For a dilute solution of a fluorescent substance, if I0 and b are constant, then F∝K'c.

[0087] That is, when εbc≤0.05, the fluorescence intensity of the solution is linearly proportional to the concentration of the fluorescent substance.

[0088] Therefore, the fluorescence intensity at concentrations of 0.1 ppm to 50 ppm is directly proportional to the concentration of alkylbenzene insulating oil in seawater.

[0089] The strongest peak of alkylbenzene insulating oil is concentrated in the 290-300 nm range. Therefore, the concentration of alkylbenzene insulating oil in seawater can be represented by the fluorescence intensity detected at a wavelength of 290-300 nm.

[0090] like Figure 1 As shown, in one example, the submarine cable oil detection device 10 also includes a drain pipe 400. The detection container 310 has a connected detection inlet 311 and a detection outlet 312, the detection inlet 311 being connected to the emulsion outlet 212, and the detection outlet 312 being connected to the drain pipe 400.

[0091] Furthermore, in one example, the submarine cable oil detection device 10 also includes a first distribution pipe 500, a second distribution pipe 600, a third distribution pipe 700, a distribution three-way valve 800, a first three-way valve 900, and a second three-way valve 1000. The first distribution pipe 500 is connected to the emulsion outlet 212, the first distribution pipe 500, the second distribution pipe 600, and the third distribution pipe 700 are connected through the distribution three-way valve 800, the second distribution pipe 600, the detection inlet 311, and the drain pipe 400 are connected through the first three-way valve 900, and the third distribution pipe 700, the third distribution pipe 700, and the drain pipe 400 are connected through the second three-way valve 1000.

[0092] exist Figure 1 In the specific example shown, the first distribution pipe 500 is connected to port a of the distribution three-way valve 800. The two ends of the second distribution pipe 600 are connected to port b of the distribution three-way valve 800 and port a of the first three-way valve 900, respectively. The two ends of the third distribution pipe 700 are connected to port c of the distribution three-way valve 800 and port a of the second three-way valve 1000, respectively.

[0093] like Figure 7 As shown, the submarine cable oil detection device 10 also includes a synchronization signal generator 1100, which is connected to the first light source 320 and the second light source 330 to generate a synchronization pulse light source.

[0094] It is understood that the aforementioned submarine cable oil detection device 10 also includes a casing (not shown in the figure), in which each component is encapsulated to prevent water and salt spray from entering the equipment and causing corrosion. Furthermore, the casing may be provided with a hydrophobic and oleophobic breathable membrane for air permeability, so as to enable air intake through the air inlet pipe.

[0095] Taking the submarine cable oil detection device 10 in the specific example shown in the figure as an example, its working process is as follows:

[0096] 1. Sampling and testing.

[0097] During sampling, ports a and b of the sample inlet three-way valve 150 are connected, and ports b and c of the air inlet three-way valve 170 are connected. Seawater enters the degassing mechanism through the sample inlet pipe 110 and the liquid inlet pipe 130. The degassing mechanism emulsifies and degasses the seawater sample. Ports a and c of the distribution three-way valve 800, ports a and b of the second three-way valve 1000, and ports b and c of the first three-way valve 900 are connected. The emulsified and degassed seawater enters the detection container 310 from bottom to top through the distribution three-way valve 800 and the second three-way valve 1000 for detection. After detection, the seawater is discharged through the first three-way valve 900 and the discharge pipe.

[0098] During testing by the testing agency 300, the light source illuminates the sample, causing it to emit fluorescence. The fluorescence is received by the collimating lens 341 and transmitted through the optical fiber 371 to the entrance slit 372. After being segmented by the collimating lens 373 and the grating 374, it is then focused by the focusing lens 375 onto the area array detector, which detects the intensity of fluorescence at each wavelength.

[0099] 2. Empty.

[0100] Before cleaning, the equipment needs to be emptied. During evacuation, ports A and C of the inlet three-way valve 170, ports A and B of the distribution three-way valve 800, ports B and C of the second three-way valve 1000, and ports A and B of the first three-way valve 900 are connected. Air enters the degassing mechanism through the inlet pipe 160. Then, it enters the detection container 310 from top to bottom through the distribution three-way valve 800 and the first three-way valve 900, causing the seawater inside to be discharged through the discharge pipe via the second three-way valve 1000, thus achieving the evacuation of the equipment.

[0101] 3. Cleaning.

[0102] After evacuation, cleaning is performed. At this time, ports a and c of the sample injection three-way valve 150 are connected, and ports b and c of the air inlet three-way valve 170 are connected. The rinsing solvent enters through the rinsing liquid pipe 120 and flows through the emulsification mechanism 200 for cleaning. After cleaning, the rinsing solvent enters the distribution three-way valve 800. The distribution three-way valve 800, together with the first three-way valve 900 and the second three-way valve 1000, causes the rinsing solvent to flow repeatedly up and down through the detection container 310, thereby cleaning the inside of the detection container 310. The rinsing solvent after cleaning is discharged through the discharge pipe.

[0103] The submarine cable oil detection device described above can quickly and accurately detect the content of alkylbenzene insulating oil in seawater. By using this device to measure at various locations on the sea surface, a water bath contamination heat map is generated to locate specific leak points. This submarine cable oil detection device features rapid detection capabilities, achieving millisecond- to second-level detection; high detection sensitivity, capable of detecting oil content at the ppm level; accurate identification of alkylbenzene insulating oil; elimination of other interferences; and an automatic cleaning function to prevent interference with subsequent tests.

[0104] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A submarine cable oil detection device, characterized in that, The device includes a sample introduction mechanism, an emulsification mechanism, and a detection mechanism. The emulsification mechanism includes an emulsification chamber and an ultrasonic vibration component, the ultrasonic vibration component extending into the emulsification chamber. The emulsification chamber has a connected emulsification inlet and an emulsification outlet. The emulsification inlet is connected to the sample introduction mechanism, and the emulsification outlet is connected to the detection mechanism. The emulsification mechanism also includes a hydrophobic and oleophobic breathable membrane, a degassing chamber, and a vacuum pump. The degassing chamber is connected to the emulsification chamber and separated from it by the hydrophobic and oleophobic breathable membrane. The vacuum pump is connected to the degassing chamber.

2. The submarine cable oil detection device as described in claim 1, characterized in that, The sample injection mechanism includes a sample injection tube, a rinsing fluid tube, a liquid injection tube, and a liquid injection pump. The sample injection tube and the rinsing fluid tube are respectively connected to the liquid injection tube, the liquid injection tube is connected to the emulsion inlet, and the liquid injection pump is mounted on the liquid injection tube.

3. The submarine cable oil detection device as described in claim 2, characterized in that, The sample injection mechanism also includes a three-way valve for sample injection, and the sample injection tube and the flushing fluid tube are connected to the liquid injection tube through the three-way valve for sample injection.

4. The submarine cable oil detection device as described in claim 2, characterized in that, The sample injection mechanism also includes an air inlet pipe, which is connected to the liquid inlet pipe. In the liquid inlet direction of the liquid inlet pipe, the connection position of the air inlet pipe is located upstream of the liquid inlet pump.

5. The submarine cable oil detection device as described in claim 4, characterized in that, The sample injection mechanism also includes an air inlet three-way valve, and the air inlet pipe is connected to the liquid inlet pipe through the air inlet three-way valve.

6. The submarine cable oil detection device as described in claim 1, characterized in that, The ultrasonic vibration component is an ultrasonic vibrating rod.

7. The submarine cable oil detection device as described in claim 1, characterized in that, The emulsification mechanism also includes a support mesh, and the hydrophobic, oleophobic, and breathable membrane is disposed on the support mesh and located on the lower side of the support mesh.

8. The submarine cable oil detection device as described in claim 1, characterized in that, The emulsification mechanism also includes a pressure sensor for detecting the pressure in the degassing chamber.

9. The submarine cable oil detection device as described in claim 1, characterized in that, The emulsification mechanism also includes a first liquid level sensor, the probe of which is located near the lower side of the hydrophobic, oleophobic, and breathable membrane.

10. The submarine cable oil detection device as described in claim 9, characterized in that, The emulsification mechanism also includes a second liquid level sensor, the probe of which is located in the emulsification chamber and below the first liquid level sensor.

11. The submarine cable oil detection device according to any one of claims 1 to 10, characterized in that, The submarine cable oil detection device also includes a drain pipe. The detection mechanism has a detection container with a detection inlet and a detection outlet connected together. The detection inlet is connected to the emulsion outlet, and the detection outlet is connected to the drain pipe.

12. The submarine cable oil detection device as described in claim 11, characterized in that, The submarine cable oil detection device further includes a first distribution pipe, a second distribution pipe, a third distribution pipe, a distribution three-way valve, a first three-way valve, and a second three-way valve. The first distribution pipe is connected to the emulsion outlet. The first distribution pipe, the second distribution pipe, and the third distribution pipe are connected through the distribution three-way valve. The second distribution pipe, the detection inlet, and the drain pipe are connected through the first three-way valve. The third distribution pipe and the drain pipe are connected through the second three-way valve.

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