Oil-liquid separation device and portable automatic ultraviolet oil detector

Abstract

The invention relates to the technical field of environment monitoring devices, and provides an oil-liquid separation device and a portable automatic ultraviolet oil measurer. The oil-liquid separation device comprises a separation assembly, a power supply and detection equipment, and the separation assembly comprises a cover body, a liquid pumping pipe, an oil suction pipe, a first driving source and a second driving source; the liquid suction pipe and the oil suction pipe penetrate through and are connected to one end of the cover body, and the distance between one end, away from the cover body, of the liquid suction pipe and the cover body is larger than that between one end, away from the cover body, of the oil suction pipe and the cover body; the liquid pumping pipe and the oil suction pipe are electrically connected with the power supply; the detection equipment is used for monitoring the electric conductivity between the liquid pumping pipe and the oil suction pipe. According to the invention, the convenience of extraction liquid separation can be improved, and the water phase in the separated extraction liquid is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water-oil separation detection devices, and in particular to an oil-liquid separation device and a portable automatic ultraviolet oil measuring instrument. Background Art

[0002] The pollution of petroleum substances in water is becoming more and more serious, affecting the water quality. The measurement method of petroleum substances in water usually adopts the ultraviolet spectrophotometry method specified by the national standard: the water sample to be tested is extracted with an extractant, and the extract is separated and dehydrated and then placed in an ultraviolet spectrophotometer for three-wavelength absorbance measurement.

[0003] In order to achieve automatic separation of the extract after extraction, the Chinese patent document with the authorization announcement number CN106526208A in the related art provides a flow path device and an online oil tester using the flow path device. During the operation of the online oil tester, the automatic injection pump is turned on to extract the extract at the bottom of the extraction bottle. The extract passes through the extract outlet pipe, the first filter, the second filter, the valve port C and the valve port E of the electromagnetic multi-way valve in sequence, and is injected into the detection device for measurement. Among them, the second filter is used to remove excess water phase in the extract to ensure the accuracy of the measurement.

[0004] When extracting the extract, in order to reduce the excess water phase in the extract, the extract in the extraction bottle needs to be extracted into the separation tube, and the solution in the separation tube is allowed to stand and separate into layers; since the diameter of the separation tube is smaller than that of the extraction bottle, the separation of each phase is obvious and sufficient, which makes it easy for the operator to observe the boundary position and shut down the automatic injector in time to prevent water from being extracted along with the extract.

[0005] In the online oil tester, the extraction bottle and the separation bottle are set separately, and the entire extraction component defines the oil-water offline by manual observation. When the suction line is about to absorb water, the automatic injector is turned off. This separation method requires the extract to pass through the extraction bottle and the separation tube in sequence before filtering, which increases the risk of contamination of the extract; and manual observation to define the oil-water offline also puts forward more operational requirements for the operator, and the error of the test results is large, and the convenience of use is low. Summary of the invention

[0006] In order to improve the convenience of separation of the extract, the aqueous phase in the extract is further reduced.

[0007] On the one hand, the present application provides an oil-liquid separation device, which adopts the following technical solution: An oil-liquid separation device, comprising: The separation assembly comprises a cover body, a liquid suction pipe, an oil suction pipe, a first driving source and a second driving source, wherein the liquid suction pipe and the oil suction pipe are both passed through and connected to one end of the cover body, and the distance between the end of the liquid suction pipe away from the cover body and the cover body is greater than The distance between the end of the oil suction pipe away from the cover body and the cover body, the first driving source is used to drive the liquid in the liquid suction pipe to flow in a direction close to the cover body, and the second driving source is used to drive the liquid in the oil suction pipe to flow in a direction close to the cover body; A power supply, the liquid suction pipe and the oil suction pipe are both capable of conducting electricity and are both electrically connected to the power supply; A detection device is used to monitor the conductivity between the liquid extraction pipe and the oil suction pipe.

[0008] By adopting the above technical solution, after using the extractant to extract the oil substances in the sample, the liquid extraction tube and the oil absorption tube are placed in the sample together; due to the different specific gravities of the substances, the sample is divided into an extraction liquid layer and a water layer from top to bottom, and the ends of the liquid extraction tube and the oil absorption tube are both extended into the water layer; the first driving source is started to extract the water in the water layer outward. Since the water body itself has a high conductivity, the detection equipment can detect the conductivity between the liquid extraction tube and the oil absorption tube. As the first driving source gradually extracts the water body, at a certain moment, it will appear that one end of the liquid extraction tube is located in the water layer, and one end of the oil absorption tube is located in the oil layer; at this time, the conductivity between the liquid extraction tube and the oil absorption tube is greatly reduced. When the detection equipment detects that the conductivity is greatly reduced, it can be judged that the port at one end of the oil absorption tube is already in the extraction liquid layer. At this time, the first driving source is turned off and the second driving source is started again to extract the extraction liquid from the sample. In this way, there is no need to manually observe and define the oil-water interface, and the water phase content in the extracted extraction liquid is further reduced, thereby achieving accurate oil-water separation. When separating the extract, there is no need to transfer the sample to a slender container, which simplifies the operation steps and improves the convenience of extract separation. Since the distance between the end of the liquid extraction tube away from the cover body and the cover body is greater than the distance between the end of the oil suction tube away from the cover body and the cover body, one end of the liquid extraction tube is always located in the water layer before and after the second driving source is started.

[0009] Optionally, the liquid suction pipe includes a liquid suction pipe body and a first wire arranged on the outer side wall of the liquid suction pipe body; the oil suction pipe includes an oil suction pipe body and a second wire arranged on the outer side wall of the oil suction pipe body; The end of the second wire away from the cover body is flush with the end of the oil suction pipe body away from the cover body, and the power supply is electrically connected to the first wire and the second wire.

[0010] By adopting the above technical solution, the setting of the first wire realizes the conductive property of the liquid extraction tube, and the setting of the second wire realizes the conductive property of the oil suction tube; the end of the second wire away from the cover body is made flush with the end of the oil suction tube body away from the cover body to ensure that when the detected conductivity changes, the end of the oil suction tube body away from the cover body is in contact with the oil-water interface.

[0011] Optionally, the liquid suction pipe and the oil suction pipe are both made of conductive materials.

[0012] By adopting the above technical solution, the liquid extraction pipe and the oil suction pipe are made of conductive materials to achieve the conductive performance of the liquid extraction pipe and the oil suction pipe.

[0013] Optionally, an ultrasonic radar is provided at the bottom of the cover.

[0014] By adopting the above technical solution, an ultrasonic radar is arranged at the bottom of the cover body, which can detect the liquid level of the sample after sampling, so as to facilitate the subsequent calculation of the content of oil substances in the sample.

[0015] Optionally, the inner diameter of the liquid extraction tube body is greater than the inner diameter of the oil suction tube body.

[0016] By adopting the above technical solution, since the sample after extraction contains more water and less extract, the inner diameter of the liquid extraction tube is larger than the inner diameter of the oil absorption tube, which facilitates controlling the extraction rate of water and extract.

[0017] Optionally, a plurality of liquid injection tubes are also provided on the cover body.

[0018] By adopting the above technical solution, when extracting the sample, it is necessary to add an extractant and an acidic solution into the sample, and an injection tube is provided on the cover body to facilitate adding the extractant and the acidic solution into the sample.

[0019] On the other hand, the present application provides a portable automatic ultraviolet oil measuring instrument.

[0020] Optionally, including a stirrer, a filtration assembly, a photometric detection device, and a sample bottle; The cover body is used to cover the bottle mouth of the sample bottle, the stirrer is used to stir the liquid in the sample bottle, and the filter assembly is connected with the oil suction pipe and the photometric detection device.

[0021] By adopting the above technical solution, after using the sample bottle for sampling, the liquid suction tube and the oil suction tube are inserted into the sample bottle, and then the cover body is placed at the mouth of the sample bottle; after adding the extractant into the sample bottle, the agitator is started to stir the sample so that the extract liquid can fully extract the oil substances in the sample; after stirring, the sample is kept still until the sample is stratified. Then use the oil-liquid separation device to extract the extract liquid in the sample bottle, and pass the extract liquid into the filter component. The filter component filters out impurities in the extract liquid. The extract liquid after impurities removal is discharged into the photometric detection device, and the photometric detection device is started to detect the extract liquid. The whole process greatly reduces manual intervention and greatly improves the efficiency and accuracy of measurement.

[0022] Optionally, the agitator includes a magnetic rotor and a third driving source, the magnetic rotor is located in the sample bottle, and the third driving source is used to drive the magnetic rotor to rotate.

[0023] By adopting the above technical solution, the magnetic rotor is located in the sample bottle, and the third driving source is started to drive the magnetic rotor to rotate, so that the sample can be fully stirred. This design not only ensures the stirring effect, but also avoids the pollution problem that may be caused by traditional stirrers.

[0024] Optionally, the filter assembly includes a first filter and a second filter, the first filter is provided with a water-blocking membrane inside, and the second filter is provided with an impurity-removing filler inside; One end of the first filter is connected to the oil suction pipe, and the other end is connected to the photometric detection device; one end of the second filter is connected to the oil suction pipe, and the other end is connected to the photometric detection device. The second driving source can drive the liquid in the oil suction pipe to flow into the first filter, and the second driving source can also drive the liquid in the first filter to flow through the second filter and then flow to the photometric detection device.

[0025] By adopting the above technical solution, the second driving source drives the extract drawn out of the oil suction pipe to flow to the first filter and the second filter in sequence. A water-proof membrane is arranged inside the first filter to preliminarily filter out large particles of impurities and moisture in the extract; and an impurity-removing filler is arranged inside the second filter to further remove impurities in the extract. The double filtration design can ensure the purity of the extract entering the photometric detection device, thereby improving the measurement accuracy.

[0026] Optionally, the photometric detection device includes an ultraviolet spectrophotometer and a cuvette, the ultraviolet spectrophotometer is used to detect the liquid in the cuvette, and the cuvette is connected to the second filter.

[0027] By adopting the above technical solution, the extract filtered by the first filter and the second filter in sequence flows into the cuvette, and the extract in the cuvette is detected by an ultraviolet spectrophotometer to detect the oil content in the sample.

[0028] In summary, the present application includes at least one of the following beneficial effects: 1. The oil-liquid separation device of the present application includes a liquid suction pipe, an oil suction pipe, a power supply and a detection device. During the oil-water separation process, the contact between the port of the oil suction pipe and the oil-water interface is determined by the change in conductivity monitored by the detection device, and there is no need to manually determine the oil-water separation position. The water content in the extracted extract is further reduced, thereby achieving accurate oil-water separation; 2. When separating the extract, the present application does not need to transfer the sample to a slender container, which simplifies the operation steps and improves the convenience of extract separation; 3. An ultrasonic radar is provided at the bottom of the cover body in the present application, which can detect the liquid level of the sample after sampling, so as to facilitate the subsequent calculation of the content of oil substances in the sample; the operator does not need to perform quantitative sampling when sampling, which improves the convenience of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the oil-liquid separation device of an embodiment of the present application; Figure 2 is a schematic diagram of the structure of the separation component of an embodiment of the present application; Figure 3 It is a schematic diagram of the overall structure of a portable automatic ultraviolet oil measuring instrument according to an embodiment of the present application; Figure 4 It is a schematic diagram of the cross-sectional structure of a portable automatic ultraviolet oil measuring instrument according to an embodiment of the present application; Figure 5 It is a partial structural schematic diagram of the portable automatic ultraviolet oil measuring instrument when the shading plate of the embodiment of the present application is opened; Figure 6 It is a schematic diagram of the pipe connection structure within components such as a sample bottle, a separation component and a photometric detection device in an embodiment of the present application.

[0030] Explanation of the reference numerals: 1. portable carrier; 11. storage slot; 12. storage slot; 13. cover plate; 14. driving member; 15. detection chamber; 151. positioning slot; 16. sunshade; 17. second peristaltic pump; 18. third peristaltic pump; 2. separation assembly; 21. cover body; 211. accommodating cylinder; 22. liquid extraction tube; 221. liquid extraction tube body; 222. first wire; 23. oil suction tube; 231. oil suction tube body; 232. second wire; 24. first driving source; 25. second driving source; 26. ultrasonic radar; 27. injection tube; 28. first A liquid guide tube; 29, a second liquid guide tube; 291, a three-way valve; 3, a power supply; 4, a detection device; 5, a multi-way reversing valve; 6, a triple reversing valve; 7, a photometric detection device; 71, an ultraviolet spectrophotometer; 72, a cuvette; 721, a waste liquid tube; 73, an extractant bottle; 74, an acid bottle; 75, an ethanol bottle; 76, a standard liquid bottle; 77, a quality control liquid bottle; 78, a waste water bottle; 79, a waste oil bottle; 8, a stirrer; 81, a magnetic rotor; 82, a third driving source; 9, a filter assembly; 91, a first filter; 92, a second filter; 10, a sample bottle. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] On the one hand, the application embodiments provide an oil-liquid separation device, which aims to achieve automated oil-water separation to improve separation efficiency and accuracy.

[0033] refer to Figure 1 and Figure 2 The oil-liquid separation device mainly includes a separation component 2, a power supply 3 and a detection device 4. The separation component 2 includes a cover body 21, a liquid extraction pipe 22, an oil suction pipe 23, a first driving source 24, a second driving source 25, a power supply 3 and a detection device 4. A receiving tube 211 is integrally formed at one end of the cover body 21, and the receiving tube 211 is specifically configured as a hollow frustum. An ultrasonic radar 26 is fixedly connected to the receiving tube 211. When in use, the ultrasonic radar 26 can emit ultrasonic signals to the sample and accurately receive the echoes reflected from these signals at the sample liquid surface. By analyzing key parameters such as the time and signal strength of the reflected wave feedback, the sample liquid level can be accurately calculated to facilitate the detection of the total amount of the sample.

[0034] refer to Figure 2, the liquid extraction pipe 22 and the oil suction pipe 23 are both located at one end of the cover body 21 provided with the receiving tube 211, and the distance between the end of the liquid extraction pipe 22 away from the cover body 21 and the cover body 21 is greater than the distance between the end of the oil suction pipe 23 away from the cover body 21 and the cover body 21. The liquid extraction pipe 22 includes a liquid extraction pipe body 221 and a first wire 222 spirally wound around the outside of the liquid extraction pipe body 221, and the oil suction pipe 23 includes an oil suction pipe body 231 and a second wire 232 spirally wound around the outside of the oil suction pipe body 231, and one end of the liquid extraction pipe body 221 and the oil suction pipe body 231 are both passed through the cover body 21 along the receiving tube 211. The end of the second wire 232 away from the cover body 21 is kept flush with the end of the oil suction pipe body 231 away from the cover body 21. In this embodiment, the end of the first wire 222 away from the cover body 21 is also kept flush with the end of the liquid extraction pipe body 221 away from the cover body 21. The provision of the first conductive wire 222 and the second conductive wire 232 realizes the electrical conductivity of the liquid suction pipe 22 and the oil suction pipe 23 .

[0035] In other embodiments, the liquid extraction pipe 22 and the oil suction pipe 23 may also be configured as a single pipe body, and conductive materials are selected to make the liquid extraction pipe 22 and the oil suction pipe 23 to achieve conductive properties of the liquid extraction pipe 22 and the oil suction pipe 23 .

[0036] refer to Figure 1 and Figure 2 The end of the liquid extraction tube body 221 located in the cover body 21 is connected to the first liquid guide tube 28, and the end of the oil suction tube body 231 located in the cover body 21 is connected to the second liquid guide tube 29. The inner diameter of the oil suction tube body 231 is smaller than the inner diameter of the liquid extraction tube body 221. In this embodiment, the liquid extraction tube body 221 and the oil suction tube body 231 are both made of hard insulating materials, the first liquid guide tube 28 and the second liquid guide tube 29 are made of flexible sealing materials, and the first wire 222 and the second wire 232 are both made of silver.

[0037] In other embodiments, in order to further protect the first wire 222 and the second wire 232 , insulating tape may be coated on the first wire 222 and the second wire 232 .

[0038] refer to Figure 1 The first driving source 24 is configured as a first peristaltic pump, and the second driving source 25 is specifically configured as a syringe pump. The first driving source 24 is installed on the first liquid guide tube 28. Starting the first driving source 24 can drive the liquid in the liquid extraction tube body 221 to flow toward the cover body 21 and be discharged along the first liquid guide tube 28; one end of the syringe pump is connected to the second liquid guide tube 29. Starting the second driving source 25 can drive the liquid in the oil suction tube body 231 to flow toward the cover body 21 and be discharged along the second liquid guide tube 29.

[0039] refer to Figure 2In order to facilitate the addition of extractants, acidic solutions and other solutions to the sample and successfully complete the extraction process, the cover body 21 is also provided with a plurality of injection tubes 27. In this embodiment, three injection tubes 27 are specifically provided. One end of the injection tube 27 passes through the receiving tube 211 along the cover body 21.

[0040] refer to Figure 1 and Figure 2 , the power supply 3 is specifically a storage battery, and the power supply 3 is electrically connected to the first wire 222 and the second wire 232. The power supply 3 can provide direct current or alternating current to the first wire 222 and the second wire 232. In this embodiment, in order to prevent the ends of the first wire 222 and the second wire 232 from being passivated due to the accumulation of impurities in the water body, alternating current is connected to the first wire 222 and the second wire 232 to maintain stable operation and ensure that the liquid extraction pipe 22 and the oil suction pipe 23 work properly. The detection device 4 is specifically set as a host computer, and the host computer is electrically connected to the first wire 222 and the second wire 232 to accurately monitor the conductivity between the liquid extraction pipe 22 and the oil suction pipe 23, thereby accurately judging the contact between the oil-water interface and the end of the oil suction pipe body 231.

[0041] When the extracted sample is subjected to oil-liquid separation, the liquid extraction tube 22 and the oil suction tube 23 are vertically extended into the sample to be tested. In the present embodiment, the extractant used when extracting the sample is n-hexane. The extracted sample is divided into an extraction liquid layer and a water layer from top to bottom, and the ends of the liquid extraction tube 22 and the oil suction tube 23 are both extended into the water layer, and the depth of one end of the liquid extraction tube 22 in the water layer is deeper than the depth of one end of the oil suction tube 23 in the water layer. After starting the first driving source 24, the water in the water layer is drawn outward along with the liquid extraction tube body 221 and the first liquid guide tube 28. In the process of the water body being drawn outward, the extraction liquid layer gradually decreases, and in the process of the extraction liquid layer decreasing, the conductivity will be instantly and accurately fed back to the detection device 4 through the first wire 222 and the second wire 232.

[0042] When the extraction liquid layer descends together with the water layer, so that the extraction liquid layer contacts the end of the oil suction tube body 231; in view of the different conductive properties of water and oil, the conductivity monitored by the detection device 4 will drop significantly, so as to accurately identify that the oil suction tube 23 has contacted the oil-water interface. At this time, shut down the first driving source 24 and stop pumping water; then start the second driving source 25 to drive the oil suction tube 23 to extract oil, and the oil-water separation can be successfully completed. In the actual operation process, when the conductivity monitored by the detection device 4 changes significantly, it is necessary to extend the set time before shutting down the first driving source 24 and stopping the pumping action of the liquid extraction tube 22. To ensure that the oil suction tube 23 is located just above the oil-water interface, further reduce the water content in the extracted extract. The extended setting time range is 200-500ms, which is specifically determined according to the power of the first driving source 24.

[0043] In other embodiments, the detection device 4 is electrically connected to a controller, and the first drive source 24 and the second drive source 25 are also electrically connected to the controller. When the conductivity monitored by the detection device 4 changes significantly, the controller can receive a signal of significant change in conductivity to control the start and stop of the first drive source 24 and the second drive source 25, thereby achieving the purpose of automatic separation of oil.

[0044] The implementation principle of the oil-liquid separation device of the embodiment of the present application is as follows: after using the extractant to extract the oil substances in the sample, the liquid extraction tube 22 and the oil suction tube 23 are placed together in the sample in a vertical state, and the ends of the liquid extraction tube 22 and the oil suction tube 23 are both deep in the water layer. Start the first driving source 24 to draw the water in the water layer outward along the liquid extraction tube 22. When the detection device 4 detects that the conductivity has dropped significantly, the first driving source 24 is immediately turned off after a delay of a set time, and then the second driving source 25 is started to extract the extract from the sample through the oil suction tube 23. The water phase content in the extracted extract is further reduced.

[0045] On the other hand, an embodiment of the present application provides a portable automatic oil tester.

[0046] refer to Figure 3 and Figure 4 A portable automatic ultraviolet oil tester includes an oil-liquid separation device, a portable carrier 1, a sample bottle 10, and a stirrer 8, a filter assembly 9 and a photometric detection device 7 arranged on the portable carrier 1. One end of the cover 21 provided with a receiving tube 211 matches the shape of the bottle mouth of the sample bottle 10. When in use, the cover 21 can be covered at the bottle mouth of the sample bottle 10 to ensure safety and sealing during operation.

[0047] refer to Figure 4 , the agitator 8 includes a magnetic rotor 81 and a third driving source 82. The magnetic rotor 81 is located in the sample bottle 10; a storage tank 11 is fixed on the portable carrier 1, and the third driving source 82 is fixed in the storage tank 11. In this embodiment, the magnetic rotor 81 is made of magnetic material, the third driving source 82 is specifically configured as a motor, and the output end of the third driving source 82 is connected to a magnet that matches the magnetic rotor 81. The sample bottle 10 is placed in the storage tank 11, and a storage plate is fixed in the storage tank 11, and the storage plate is located above the third driving source 82. Placing the sample bottle 10 on the storage plate can make the sample bottle 10 located above the third driving source 82. After starting the third driving source 82, the magnetic rotor 81 in the sample bottle 10 can be driven to rotate efficiently by magnetic force, so as to achieve the purpose of fully stirring the liquid in the sample bottle 10. The magnetically driven stirring method not only achieves comprehensive and uniform stirring of the liquid, but also effectively avoids the possible liquid contamination and agitator 8 wear problems in the traditional mechanical stirring method.

[0048] In other embodiments, in order to ensure that the stirrer 8 stirs the liquid in the sample bottle 10 stably, a clamping member may be further installed in the storage tank 11 to clamp and position the sample bottle 10 .

[0049] refer to Figure 3 The upper surface of the portable carrier 1 is also provided with a storage groove 12, and the opening of the storage groove 12 is provided on a cover plate 13; one end of the cover plate 13 is hinged to the portable carrier 1, and the opening of the storage groove 12 can be opened or closed by rotating the cover plate 13. The portable carrier 1 is also provided with a driving member 14 for driving the cover plate 13 to rotate. In this embodiment, the driving member 14 is specifically configured as an electric cylinder. Two electric cylinders are arranged at intervals, and one end of the electric cylinder is hinged to the cover plate 13, and the other end is hinged to the inner wall of the storage groove 12. When the driving member 14 is started, the cover plate 13 can be driven to rotate.

[0050] refer to Figure 3 and Figure 5 , the second driving source 25 is fixedly connected to the side wall of the cover plate 13 near the storage groove 12, and the second driving source 25 is connected to the multi-way reversing valve 5, and the second driving source 25 is indirectly connected to an injection tube 27 and an extractant bottle 73 through the multi-way reversing valve 5. When in use, the second driving source 25 is started to inject the extractant in the extractant bottle 73 into the sample bottle 10. Among the remaining two injection tubes 27, one injection tube 27 is connected to the acid bottle 74 at one end, and the other injection tube 27 is connected to the ethanol bottle 75 at one end; when in use, the acid bottle 74 contains hydrochloric acid solution, and the ethanol bottle 75 contains anhydrous ethanol. The injection tube 27 connected to the acid bottle 74 is installed with a second peristaltic pump 17, and the injection tube 27 connected to the ethanol bottle 75 is installed with a third peristaltic pump 18. When performing extraction, the second peristaltic pump 17 and the third peristaltic pump 18 are started to add hydrochloric acid solution and anhydrous ethanol to the sample bottle 10.

[0051] refer to Figure 3 and Figure 5 The filter assembly 9 includes a first filter 91 and a second filter 92. A plurality of mounting clips are fixed on the side wall of the cover plate 13 on which the second driving source 25 is provided. The first filter 91 and the second filter 92 are fixed on the cover plate 13 by mounting clips. A water-proof membrane is installed in the first filter 91, and an impurity-removing filler is filled in the second filter 92. In this embodiment, the impurity-removing filler is specifically selected from magnesium silicate. The top of the first filter 91 is connected to the multi-way reversing valve 5 through a hose, and the bottom of the first filter 91 is connected to the triple reversing valve 6 through another hose, and the triple reversing valve 6 is connected to the multi-way reversing valve 5 through a hose. The top of the second filter 92 is connected to the multi-way reversing valve 5 through a hose, and the bottom of the second filter plate tube is also connected to the triple reversing valve 6 through a hose.

[0052] In this embodiment, one end of the second liquid guide tube 29 is directly connected to the multi-directional reversing valve 5. After the second driving source 25 is started, the extract drawn out through the oil suction tube 23 and the second liquid guide tube 29 flows into the first filter 91 and the second filter 92 in sequence through the multi-directional reversing valve 5 for filtration. The first filter 91 initially filters out large particles of impurities and water in the extract, and the second filter 92 filters out animal and vegetable oils and residual water in the extract. The main residue in the extract is petroleum solutes, so as to specifically detect the content of petroleum substances in the sample.

[0053] refer to Figure 3 and Figure 4 , the photometric detection device 7 is arranged on the portable carrier 1, and the photometric detection device 7 includes an ultraviolet spectrophotometer 71 and a second driving source 25. A detection chamber 15 with an opening at one end is fixed on the portable carrier 1, and a shading plate 16 is slidably connected to the opening of the detection chamber 15. The detection chamber 15 can be opened or closed by sliding the shading plate 16. A positioning groove 151 is fixed in the detection chamber 15, and a cuvette 72 is located in the positioning groove 151. The ultraviolet spectrophotometer 71 is fixed on the portable carrier 1; and the ultraviolet spectrophotometer 71 is located on one side of the detection chamber 15, and the detection head of the ultraviolet spectrophotometer 71 is connected to the detection chamber 15. Reference Figure 5 The cuvette 72 is connected to the triple reversing valve 6 through a hose, and the extract after double filtration by the filter assembly 9 enters the cuvette 72 through the triple reversing valve 6 under the drive of the second driving source 25. The cuvette 72 is also connected to a waste liquid pipe 721, and the end of the waste liquid pipe 721 away from the cuvette 72 extends to the outside of the cuvette 72 and is connected to the multi-reversing valve 5. When the ultraviolet spectrophotometer 71 is finished detecting, the second driving source 25 is started, and under the action of the multi-reversing valve 5, the extract in the cuvette 72 can be driven to discharge from the cuvette 72, so as to facilitate the next detection.

[0054] refer to Figure 5 The multi-way reversing valve 5 is also connected to a standard liquid bottle 76 and a quality control liquid bottle 77 through a hose. The standard liquid bottle 76 is used to hold an oil solution of known concentration for establishing a standard curve; the quality control liquid bottle 77 is used to hold a quality control sample of known concentration, and the concentration of the quality control sample is close to or covers the expected concentration range of the sample in the sample bottle. To ensure the reliability of the test data. Before discharging the extract into the cuvette 72, the second driving source 25 needs to be started to transport the liquid in the standard liquid bottle 76 and the liquid in the quality control liquid bottle 77 to the cuvette 72 in turn for detection one by one.

[0055] refer to Figure 5One end of the first liquid conduit 28 is connected to a three-way valve 291. The remaining two interfaces of the three-way valve 291 are connected to a waste water bottle 78 at one interface and to a waste oil bottle 79 at the other interface. The waste oil bottle 79 is connected to the multi-connected reversing valve 5 through a hose. The first driving source 24 is started to drive the waste water in the first liquid conduit 28 to flow into the waste water bottle 78; the second driving source 25 is started to discharge the waste extract discharged from the cuvette 72 into the waste oil bottle 79 under the action of the multi-connected reversing valve 5.

[0056] The implementation principle of the portable automatic oil tester of the embodiment of the present application is as follows: after the sample bottle 10 is used to hold the sample, the sample bottle 10 is placed in the storage tank 11; the cover body 21 is then covered to the bottle mouth of the sample bottle 10, so that the liquid extraction tube 22 and the oil suction tube 23 are vertically extended into the sample bottle 10 and contact the sample. After the cover body 21 is covered, the ultrasonic radar 26 detects the liquid level of the sample in the sample bottle 10 to obtain the sample content in the sample bottle 10. The second driving source 25 is started to inject the extractant into the sample bottle 10; the injection tube 27 is then used to inject hydrochloric acid solution into the sample bottle 10. If necessary, anhydrous ethanol can also be injected through the injection tube 27 for demulsification. Then the third driving source 82 is started to drive the magnetic rotor 81 to rotate and stir to fully extract. After stirring, the sample is stationary until the sample is layered. The first driving source 24 is started to pump the water in the water layer into the waste water bottle 78 along the liquid extraction tube 22. When the detection device 4 detects that the conductivity has dropped significantly, the first driving source 24 is immediately turned off after a set delay, and the second driving source 25 is started again to extract the extract from the sample bottle through the oil suction pipe 23. Under the action of the second driving source 25 and the multi-directional valve 5, the extract passes through the first filter 91 and the second filter 92 in sequence and then enters the cuvette 72. The ultraviolet spectrophotometer 71 is started to detect the content of petroleum substances in the extract in the cuvette 72. After the detection is completed, the second driving source 25 is started again to discharge the extract in the cuvette 72 to the waste oil bottle 79.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An oil-liquid separation device, characterized in that: include: The separation component (2) comprises a cover body (21), a liquid extraction pipe (22), an oil suction pipe (23), a first driving source (24) and a second driving source (25); the liquid extraction pipe (22) and the oil suction pipe (23) are both passed through and connected to one end of the cover body (21); the distance between the end of the liquid extraction pipe (22) away from the cover body (21) and the cover body (21) is greater than the distance between the end of the oil suction pipe (23) away from the cover body (21) and the cover body (21); the first driving source (24) is used to drive the liquid in the liquid extraction pipe (22) to flow in a direction close to the cover body (21); and the second driving source (25) is used to drive the liquid in the oil suction pipe (23) to flow in a direction close to the cover body (21); A power supply (3), the liquid extraction pipe (22) and the oil suction pipe (23) are both capable of conducting electricity and are both electrically connected to the power supply (3); A detection device (4), the detection device (4) being used to monitor the electrical conductivity between the liquid extraction pipe (22) and the oil suction pipe (23); When in use, the liquid extraction tube (22) and the oil absorption tube (23) are placed together in the sample, and the ends of the liquid extraction tube (22) and the oil absorption tube (23) are both inserted into the water layer; the first driving source (24) is started, and the water in the water layer is drawn out along with the liquid extraction tube (22) until the port at one end of the oil absorption tube (23) is located in the extraction liquid layer, and then the first driving source (24) is closed and the second driving source (25) is started.

2. The oil-liquid separation device according to claim 1, characterized in that: The liquid extraction pipe (22) comprises a liquid extraction pipe body (221) and a first wire (222) arranged on the outer side wall of the liquid extraction pipe body (221); the oil suction pipe (23) comprises an oil suction pipe body (231) and a second wire (232) arranged on the outer side wall of the oil suction pipe body (231); The end of the second wire (232) away from the cover body (21) is flush with an end of the oil suction pipe body (231) away from the cover body (21), and the power supply (3) is electrically connected to the first wire (222) and the second wire (232).

3. The oil-liquid separation device according to claim 1, characterized in that: The liquid suction pipe (22) and the oil suction pipe (23) are both made of conductive material.

4. The oil-liquid separation device according to claim 1, characterized in that: An ultrasonic radar (26) is arranged at the bottom of the cover body (21).

5. The oil-liquid separation device according to claim 2, characterized in that: The inner diameter of the liquid extraction pipe body (221) is greater than the inner diameter of the oil suction pipe body (231).

6. The oil-liquid separation device according to claim 1, characterized in that: The cover body (21) is also provided with a plurality of liquid injection tubes (27).

7. A portable automatic ultraviolet oil measuring instrument, comprising the oil-liquid separation device according to any one of claims 1 to 6, characterized in that: It also includes a stirrer (8), a filtering assembly (9), a photometric detection device (7) and a sample bottle (10); The cover body (21) is used to cover the bottle mouth of the sample bottle (10), the stirrer (8) is used to stir the liquid in the sample bottle (10), and the filter assembly (9) is connected to the oil suction pipe (23) and the photometric detection device (7).

8. A portable automatic ultraviolet oil measuring instrument according to claim 7, characterized in that: The stirrer (8) comprises a magnetic rotor (81) and a third driving source (82); the magnetic rotor (81) is located in the sample bottle (10); and the second driving source (25) is used to drive the magnetic rotor (81) to rotate.

9. A portable automatic ultraviolet oil measuring instrument according to claim 7, characterized in that: The filter assembly (9) comprises a first filter (91) and a second filter (92); a water-blocking membrane is arranged inside the first filter (91), and an impurity-removing filler is arranged inside the second filter (92); One end of the first filter (91) is in communication with the oil suction pipe (23), and the other end is in communication with the photometric detection device (7); one end of the second filter (92) is in communication with the oil suction pipe (23), and the other end is in communication with the photometric detection device (7). The second driving source (25) can drive the liquid in the oil suction pipe (23) to flow into the first filter (91), and the second driving source (25) can also drive the liquid in the first filter (91) to flow through the second filter (92) and then flow to the photometric detection device (7).

10. A portable automatic ultraviolet oil measuring instrument according to claim 9, characterized in that: The photometric detection device (7) comprises an ultraviolet spectrophotometer (71) and a cuvette (72); the ultraviolet spectrophotometer (71) is used to detect liquid in the cuvette (72); and the cuvette (72) is connected to the second filter (92).

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