Alkylbenzene insulating oil testing organization and automatic testing device

Abstract

This invention relates to an alkylbenzene insulating oil detection mechanism and automatic detection device. A first light source and a second light source are arranged on the side of the detection container. The light emitted by the light sources excites the liquid to fluoresce, and a fluorescence collection component is provided to collect the fluorescence emitted by the liquid. The first light source has an emission wavelength of 210nm–230nm, and the second light source has an emission wavelength of 255nm–275nm, capable of detecting alkylbenzene insulating oil and eliminating interference from diesel fuel. Both diesel fuel and alkylbenzene insulating oil have a distinct peak around 265nm. Diesel fuel has a second peak around 234nm, while the insulating oil sample has a second peak around 220nm. By using the first light source with an emission wavelength of 255nm–275nm to identify alkylbenzene insulating oil and eliminate interference from diesel fuel, and by using the second light source with an emission wavelength of 255nm–275nm, the alkylbenzene insulating oil can be quantified.

Description

Technical Field

[0001] This invention relates to the field of material testing technology, and in particular to an alkylbenzene insulating oil testing mechanism and automatic 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 possess superior 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. This can damage the ecological environment and cause 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 it from spreading. However, there is currently no testing equipment specifically for alkylbenzene insulating oil. Summary of the Invention

[0004] Therefore, it is necessary to provide an alkylbenzene insulating oil testing mechanism and an automatic testing device.

[0005] An alkylbenzene insulating oil testing mechanism includes a testing container, a first light source, a second light source, and a fluorescence collection component. The first light source and the second light source are respectively disposed on the side of the testing container. The first light source has an emission wavelength of 210nm to 230nm, and the second light source has an emission wavelength of 255nm to 275nm. The fluorescence collection component is used to collect the fluorescence emitted by the liquid in the testing container.

[0006] In one embodiment, the detection container is a cubic cavity.

[0007] In one embodiment, the emission wavelength of the first light source is 215nm to 225nm.

[0008] In one embodiment, the emission wavelength of the second light source is 260nm to 270nm.

[0009] In one embodiment, the first light source and the second light source are respectively disposed on opposite sides of the detection container.

[0010] In one embodiment, the fluorescence acquisition component includes a collimating lens.

[0011] In one embodiment, the fluorescence acquisition component further includes a reflector, and the reflector and the collimating lens are respectively disposed on opposite sides of the detection container.

[0012] In one embodiment, the alkylbenzene insulating oil testing mechanism further includes a mounting base having a receiving cavity, in which the testing container is disposed, and the first light source, the second light source, and the collimating lens are respectively mounted on the mounting base.

[0013] In one embodiment, the alkylbenzene insulating oil detection mechanism further includes a fluorescence transmission component and a fluorescence detection component, wherein the fluorescence transmission component is used to transmit the fluorescence collected by the fluorescence collection component to the fluorescence detection component for detection.

[0014] In one embodiment, the fluorescence transmission component includes an optical fiber, an entrance slit, a collimating lens, a grating, and a focusing lens arranged sequentially in the fluorescence transmission direction.

[0015] In one embodiment, the fluorescence detection component includes an area array detector.

[0016] An automatic detection device includes a sample injection mechanism and an alkylbenzene insulating oil detection mechanism as described in any of the above embodiments. The sample injection mechanism includes a sample injection tube, a flushing liquid tube, a liquid inlet tube, and a liquid inlet pump. The sample injection tube and the flushing liquid tube are respectively connected to the liquid inlet tube, the liquid inlet tube is connected to the detection container, and the liquid inlet pump is disposed on the liquid inlet tube.

[0017] In one embodiment, the automatic detection device further includes a drain pipe, and the detection container has a connected detection inlet and a detection outlet, the detection inlet being connected to the inlet pipe and the detection outlet being connected to the drain pipe.

[0018] In one embodiment, the automatic 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 inlet pipe. 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.

[0019] Compared with traditional solutions, the above-mentioned alkylbenzene insulating oil testing mechanism and automatic testing device have the following advantages:

[0020] The aforementioned alkylbenzene insulating oil detection mechanism and automatic detection device includes a detection container to hold the liquid to be tested. A first light source and a second light source are positioned on the side of the container. The light emitted by the light sources excites the liquid to fluoresce, and a fluorescence collection component is included to collect the fluorescence emitted by the liquid. The first light source has an emission wavelength of 210nm–230nm, and the second light source has an emission wavelength of 255nm–275nm, capable of detecting alkylbenzene insulating oil while eliminating interference from diesel fuel. More specifically, analysis of the components in seawater revealed that diesel fuel was the largest interfering component, as the excitation spectra of diesel fuel and insulating oil samples are essentially identical. Comparison of their excitation spectra revealed a distinct peak around 265nm for both diesel fuel and alkylbenzene insulating oil. Diesel fuel exhibits a second peak around 234nm, while the insulating oil sample shows a second peak around 220nm. Therefore, by using a first light source with an emission wavelength of 255nm–275nm to identify alkylbenzene insulating oil and eliminate diesel fuel interference, and by using a second light source with an emission wavelength of 255nm–275nm, alkylbenzene insulating oil can be quantified. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an alkylbenzene insulating oil detection mechanism according to one embodiment;

[0022] Figure 2 for Figure 1 An exploded view of the alkylbenzene insulating oil testing mechanism shown.

[0023] Figure 3 for Figure 1 A cross-sectional view of the alkylbenzene insulating oil testing mechanism shown;

[0024] Figure 4 for Figure 1 The diagram shows the structure of the fluorescence acquisition component, fluorescence detection component, and fluorescence transmission component in the alkylbenzene insulating oil detection mechanism.

[0025] Figure 5 This is a schematic diagram of the structure of an automatic detection device according to an embodiment;

[0026] Figure 6 for Figure 5 A schematic diagram of the emulsification mechanism in the automatic detection device shown.

[0027] Figure 7 for Figure 5 A cross-sectional view of the emulsification mechanism in the automatic detection device shown.

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

[0029] 10. Automatic 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 liquid inlet; 212. Emulsification liquid 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 mesh; 270. Pressure sensor; 280. First liquid level sensor; 290. Second liquid level sensor; 300. Detection mechanism; 310. Detection container; 311. Detection... 312. Detection of liquid inlet; 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

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the 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 thorough and complete understanding of the disclosure of the invention.

[0031] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] In the description of this invention, it should be understood that 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 or order of the indicated technical features.

[0033] 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 in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Please refer to Figures 1 to 3 As shown, an alkylbenzene insulating oil detection mechanism 300 according to an embodiment of the present invention includes a detection container 310, a first light source 320, a second light source 330, and a fluorescence collection component 340.

[0035] 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.

[0036] The aforementioned alkylbenzene insulating oil testing mechanism 300 includes a testing container 310 to hold the liquid to be tested. A first light source 320 and a second light source 330 are positioned on the side of the testing container 310. The light emitted by the light sources excites the liquid to fluoresce. 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–230nm, and the second light source 330 has an emission wavelength of 255nm–275nm, enabling the detection of alkylbenzene insulating oil while eliminating interference from diesel fuel. More specifically, analysis of the components in seawater revealed that the largest interfering component is diesel fuel, as the excitation spectra of diesel fuel and insulating oil samples are essentially 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In the specific example illustrated, 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 positioned at approximately the same height.

[0046] In one example, the alkylbenzene insulating oil testing mechanism 300 also includes a mounting base 350. The mounting base 350 has a receiving cavity 351 in which the testing 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.

[0047] In one example, the alkylbenzene insulating oil 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.

[0048] like Figure 4 As shown, in one example, the alkylbenzene insulating oil 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The aforementioned alkylbenzene insulating oil testing device 300 collects the fluorescence emitted by the liquid after absorbing light energy. The presence of alkylbenzene insulating oil is determined by the fluorescence spectrum, and the amount of alkylbenzene insulating oil is quantified by the fluorescence intensity.

[0053] 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).

[0054] F=K'(I0-I t Equation (1)

[0055] Among them, I t =I0·10 -εbc K' is a constant that depends on the quantum efficiency Φ of the fluorescent material.

[0056] According to the Lambert-Beer Law (LB Law), we can obtain the following equation (2).

[0057] F=K'(I0-I0·10 -εbc )=K'I0(1-10 -εbc )=K'I0(1-e εbc Equation (2)

[0058] In equation (2), e εbc Expanding, we get the following equation (3).

[0059]

[0060] 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.

[0061] F=K'I0εbc Equation (4)

[0062] For a dilute solution of a fluorescent substance, if I0 and b are constant, then F∝K'c.

[0063] That is, when εbc≤0.05, the fluorescence intensity of the solution is linearly proportional to the concentration of the fluorescent substance.

[0064] 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.

[0065] 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.

[0066] Furthermore, such as Figure 5 As shown, the present invention also provides an automatic detection device 10, including a sample injection mechanism 100 and an alkylbenzene insulating oil detection mechanism 300 of any of the above examples. The sample injection mechanism 100 is connected to a detection container 310 and is used to input the liquid to be detected.

[0067] like Figure 6 and Figure 7 As shown, in one example, the automatic detection device 10 further includes an emulsification mechanism 200. 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 feeding mechanism 100, and the emulsification outlet 212 is connected to the alkylbenzene insulating oil detection mechanism 300.

[0068] In the above example, the automatic detection device 10 sets up an emulsification mechanism 200 between the sample injection mechanism 100 and the alkylbenzene insulating oil detection mechanism 300. The emulsification mechanism 200 includes an emulsification chamber 210 and an ultrasonic vibration component 220. When liquid is input into the emulsification chamber 210, the vibration of the ultrasonic vibration component 220 generates cavitation effect on the liquid, so that the alkylbenzene insulating oil in the water is emulsified evenly, thereby achieving accurate subsequent detection.

[0069] 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.

[0070] In one example, the injection tube 110 is connected to a float, such as a float (not shown), to achieve buoyancy.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] exist Figure 5 In the specific example shown, the injection tube 110 and the rinsing fluid tube 120 are connected to ports b and c of the injection three-way valve 150, respectively, and the liquid injection tube 130 is connected to port a of the injection three-way valve 150.

[0075] 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.

[0076] 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.

[0077] exist Figure 5 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.

[0078] In one example, the ultrasonic vibration component 220 is 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 is connected to the inlet pipe 130, and the emulsification outlet 212 is connected to the alkylbenzene insulating oil detection mechanism 300.

[0079] The cavitation effect of the liquid caused by the vibration of the ultrasonic vibrator emulsifies the alkylbenzene insulating oil in the water, thereby enabling accurate subsequent detection.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] In one example, the emulsification mechanism 200 also includes a pressure sensor 270 for detecting the pressure in the degassing chamber 240.

[0087] 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.

[0088] 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.

[0089] 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, it controls the liquid level to reach the probe of the second liquid level sensor 290 and prevents the liquid level from reaching the probe of the first liquid level sensor 280.

[0090] like Figure 5 As shown, in one example, the automatic 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 automatic 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 5 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 4 As shown, the submarine cable oil detection device 10 also includes a synchronization signal generator 11001100, which is connected to the first light source 320320 and the second light source 330330 to generate a synchronization pulse light source.

[0094] It is understood that the aforementioned submarine cable oil detection device 10 also includes a housing (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 housing may be provided with a hydrophobic and oleophobic breathable membrane 230 for air permeability to allow air to enter through the air inlet pipe 160.

[0095] Taking the automatic 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 alkylbenzene insulating oil testing mechanism 300, a light source illuminates the sample, causing it to emit fluorescence. The fluorescence is received by a collimating lens 341 and transmitted through an optical fiber 371 to an entrance slit 372. After being segmented by a collimating lens 373 and a grating 374, it is then focused by a focusing lens 375 onto an 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.

Claims

1. An automatic detection device, characterized in that, This includes the sample introduction mechanism, the emulsification mechanism, and the alkylbenzene insulating oil testing mechanism; The alkylbenzene insulating oil testing mechanism includes a testing container, a first light source, a second light source, and a fluorescence collection component. The first light source and the second light source are respectively disposed on the side of the testing container. The emission wavelength of the first light source is 215nm~225nm, and the emission wavelength of the second light source is 260nm~270nm. The fluorescence collection component is used to collect the fluorescence emitted by the liquid in the testing container. 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 detection container, and the liquid injection pump is mounted on the liquid injection tube. The emulsification mechanism includes an emulsification chamber, an ultrasonic vibration component, a hydrophobic and oleophobic breathable membrane, a degassing chamber, and a vacuum pump. The ultrasonic vibration component extends into the emulsification chamber, which 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. 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 automatic detection device as described in claim 1, characterized in that, The detection container is a cubic cavity.

3. The automatic detection device as described in claim 1, characterized in that, The detection container has a light-transmitting window, or the detection container is a transparent container.

4. The automatic detection device as described in claim 1, characterized in that, The first light source and the second light source are respectively disposed on opposite sides of the detection container.

5. The automatic detection device as described in claim 1, characterized in that, The fluorescence acquisition component includes a collimating lens.

6. The automatic detection device as described in claim 5, characterized in that, The fluorescence acquisition component also includes a reflector, and the reflector and the collimating lens are respectively disposed on opposite sides of the detection container.

7. The automatic detection device as described in claim 5, characterized in that, The alkylbenzene insulating oil testing mechanism further includes a mounting base with a receiving cavity. The testing container is disposed in the receiving cavity, and the first light source, the second light source, and the collimating lens are respectively mounted on the mounting base.

8. The automatic detection device as described in any one of claims 1 to 7, characterized in that, The alkylbenzene insulating oil testing mechanism further includes a fluorescence transmission component and a fluorescence detection component. The fluorescence transmission component is used to transmit the fluorescence collected by the fluorescence collection component to the fluorescence detection component for detection.

9. The automatic detection device as described in claim 8, characterized in that, The fluorescence transmission component includes an optical fiber, an entrance slit, a collimating lens, a grating, and a focusing lens arranged sequentially in the fluorescence transmission direction.

10. The automatic detection device as described in claim 8, characterized in that, The fluorescence detection component includes an area array detector.

11. The automatic detection device as described in claim 1, characterized in that, The automatic detection device further includes a drain pipe, and the detection container has a detection inlet and a detection outlet connected together. The detection inlet is connected to the inlet pipe, and the detection outlet is connected to the drain pipe.

12. The automatic detection device as described in claim 11, characterized in that, The automatic 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 inlet pipe. 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 outlet pipe are connected through the first three-way valve. The third distribution pipe, the detection outlet, and the outlet pipe are connected through the second three-way valve.

Images