Comprehensive oil quality detector

Abstract

The utility model relates to the field of oil detection, in particular to an oil quality comprehensive detector, which is characterized in that a viscosity detection module, a moisture detection module, a flash point detection module, a micro oil pump and a control valve are arranged in a case; one end of the micro oil pump is connected with the control valve, and the other end is connected with an external oil sample bottle; the control valve is respectively connected with the viscosity detection module and the moisture detection module; an oil inlet and an oil outlet are formed in a case body of the case, the micro oil pump is connected with an external oil sample bottle through the oil inlet, and the viscosity detection module is connected with the external oil sample bottle through the oil outlet. The oil sample comprehensive detection device integrates the viscosity detection module, the moisture detection module and the flash point detection module, is compact in structure and convenient to carry, and can rapidly and conveniently carry out oil sample comprehensive or independent detection. The oil viscosity is detected through a falling ball method, and compared with traditional capillary detection, the applicable viscosity range is wider, and the adaptability is better. The moisture detection adopts a chemical detection principle, is more accurate and is not easy to interfere.

Description

Technical Field

[0001] This utility model relates to the field of oil testing, specifically to an oil quality comprehensive testing instrument. Background Technology

[0002] Fluids play a vital and multifaceted role in the operation of mechanical equipment, much like the "blood" of a mechanical system. They are generally classified into categories such as lubricating oil, hydraulic oil, fuel oil, and coolant. Fluids in mechanical equipment serve important functions including sealing, lubrication, friction reduction, cooling, providing power, cleaning, vibration damping, and corrosion prevention. The quality of the fluids is closely related to the operating condition of the mechanical equipment and is an important indicator of its technical condition.

[0003] In actual production, by testing and analyzing the physical and chemical properties of the oil, it is possible to effectively evaluate whether the oil meets the usage requirements. This allows for timely maintenance measures such as filtration and oil changes, preventing malfunctions and extending service life. Simultaneously, it enables further verification of equipment status to identify potential faults, eliminate problems, and prevent major malfunctions and accidents. Furthermore, by rationally scheduling maintenance and repair times based on equipment status, the impact of downtime and scheduled maintenance on production is reduced. Moreover, this increases the mean time between failures (MTBF) and improves productivity.

[0004] For lubricating oil, viscosity is the most critical indicator and a key focus of lubricating oil testing. If water or diesel fuel enters the lubricating oil, it can cause significant damage to equipment. Moisture detection can determine whether water has entered the lubricating oil, while flash point detection can help determine if fuel fuel has entered the lubricating oil. In addition, the flash point of fuel fuel is an important indicator for ensuring safety. Under normal field conditions, testing the viscosity, moisture content, and flash point of the oil and comparing them with the oil quality control standard values ​​can effectively evaluate the quality of the oil.

[0005] Conventional oil testing involves using separate devices to measure viscosity, moisture content, and flash point. These devices are cumbersome to use, inconvenient for testing in industrial environments, difficult to carry, and their results are easily affected by various impurities in the oil. Data storage, management, and comprehensive quality assessment are also challenging. Therefore, there is an urgent need for a portable, comprehensive, multi-parameter oil quality testing instrument. Utility Model Content

[0006] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a comprehensive oil quality testing instrument.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an oil quality comprehensive testing instrument, comprising: a chassis, a viscosity testing module, a moisture testing module, a flash point testing module, a micro oil pump, and a control valve;

[0008] The viscosity detection module, moisture detection module, flash point detection module, micro oil pump, and control valve are all housed inside the chassis; one end of the micro oil pump is connected to the control valve, and the other end is connected to an external oil sample bottle; the control valve is connected to both the viscosity detection module and the moisture detection module.

[0009] The chassis is equipped with an oil inlet and an oil outlet. The micro oil pump is connected to an external oil sample bottle through the oil inlet, and the viscosity detection module is connected to an external oil sample bottle through the oil outlet.

[0010] The present invention is further configured such that: the viscosity detection module includes a shell, an oil passage, a metal ball, a position proximity sensor, a push-pull electromagnet, a first oil inlet, and a first oil outlet;

[0011] The outer casing has an oil passage inside, a metal ball is installed inside the oil passage, and a push-pull electromagnet is installed at the top of the oil passage.

[0012] One end of the first oil inlet is connected to the bottom of the oil passage, and the other end is connected to the control valve. The first oil outlet is connected to the top of the oil passage and is located below the push-pull electromagnet.

[0013] The proximity sensor includes an upper proximity switch and a lower proximity switch. The upper proximity switch is located at the first oil outlet, and the lower proximity switch is located at the first oil inlet.

[0014] The present invention is further configured such that: a heating film is also closely attached to the outside of the oil passage, an insulation layer is provided between the heating film and the outer shell, and a temperature sensor is provided inside the oil passage.

[0015] The present invention is further configured such that: the moisture detection module includes a second oil inlet, a test chamber, a stirrer, a pressure sensor, a reagent bottle, and an oil inlet needle;

[0016] One end of the second oil inlet is connected to a control valve, and the other end is connected to a test chamber. A pressure sensor is also installed on the test chamber. The bottom of the test chamber is connected to an oil inlet needle, and a reagent bottle is installed below the oil inlet needle. The reagent bottle is installed on a stirrer.

[0017] The chemical pressure method is used. After the oil sample to be tested enters the reagent bottle, it reacts chemically with the calcium hydride reagent in the bottle: H2O + CaH2 → H2 + Ca(OH)2. The hydrogen gas generated by the reaction increases the gas pressure in the closed space. The pressure difference is detected by a pressure sensor and the water content is calculated.

[0018] The present invention is further configured such that: the control valve includes a first pinch valve and a second pinch valve; the outlet of the micro oil pump is connected to the viscosity detection module and the moisture detection module respectively through a three-way pipe, the first pinch valve is set on the pipe between the three-way pipe and the viscosity detection module, and the second pinch valve is set on the pipe between the three-way pipe and the moisture detection module.

[0019] The present invention is further configured such that: the comprehensive oil quality tester also includes a synchronization valve and an air pump, the outlet of the micro oil pump is connected to the synchronization valve and then to the three-way valve, and the synchronization valve is connected to the air pump.

[0020] This invention is further configured such that the flash point detection module is located at the top inside the casing and is used to detect the flash point value. A quantitative oil sample can be manually injected into the flash point detection module from the top of the casing. The flash point of the oil can be quickly determined to be within acceptable limits by combining the sample with standard values.

[0021] The flash point detection module operates using the closed-cup flash point detection method, taking the lowest temperature value of the fuel vapor at the high-voltage arc point as the flash point value.

[0022] To prevent high-voltage circuits from interfering with other detection modules, shielding optimization measures are adopted to separate the flash point detection module, especially the high-voltage section. Additionally, a filtering and isolation design is implemented. Furthermore, the flash point detection module's flash time is staggered from the operating time of other modules. These measures ensure the normal operation and detection accuracy of the instrument.

[0023] To improve the efficiency of flash point detection, a three-stage temperature control mode is adopted. The first stage is full-power heating to raise the oil sample temperature as quickly as possible. The second stage is decelerated heating to ensure uniform heating and prevent temperature overshoot. The third stage is slow heating to reduce the heating step size and ensure more accurate acquisition of the flash point temperature.

[0024] The flash point detection module manually injects a quantitative amount of oil sample into the detection oil cup, and removes the oil sample by wiping after the test is completed.

[0025] The present invention is further provided with a power aviation plug on the chassis for connecting to a power source.

[0026] The present invention is further configured such that: the chassis is provided with an LCD screen and a control panel, and the control module interacts with the user through the LCD screen and the control panel.

[0027] The present invention is further configured such that the comprehensive oil quality tester also includes a control module, which is electrically connected to the viscosity test module, the moisture test module, the micro oil pump, the control valve, the LCD screen and the control panel.

[0028] In summary, the beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0029] This utility model integrates a viscosity detection module, a moisture detection module, and a flash point detection module into one unit. It has a compact structure, is easy to carry, and can quickly and conveniently perform oil sample testing.

[0030] Considering both comprehensive and individual testing needs, a modular design is adopted. Each testing module can be used as an integrated device for testing, or it can be used directly for single-function testing.

[0031] This invention uses a falling ball method to detect oil viscosity, which has a wider applicable viscosity range and better adaptability compared to traditional capillary detection. Moisture detection employs a chemical detection device, which is more accurate and less susceptible to interference.

[0032] It is highly automated and can perform multi-parameter detection, data storage and comprehensive quality evaluation with one click. It can also be equipped with built-in oil performance control standards to enable "foolproof" application for end users.

[0033] This invention employs an oil-gas combined mode to achieve automatic cleaning and evacuation of the moisture and viscosity oil circuit, further facilitating the use and maintenance of the instrument. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the internal structure of an oil quality comprehensive testing instrument.

[0036] Figure 2 Axonometric view of an oil quality comprehensive testing instrument;

[0037] Figure 3 This is a schematic diagram of the viscosity detection module.

[0038] Figure 4 This is the main view of the moisture detection module;

[0039] Figure 5 Left view of the moisture detection module;

[0040] Figure 6 This is a flowchart of the oil circuit control process;

[0041] Figure 7 This is a flowchart of the gas path control process.

[0042] The attached diagram lists the components represented by each number as follows:

[0043] 1. Control panel; 2. LCD screen; 3. Chassis; 4. Power supply aviation plug; 5. Flash point detection module.

[0044] 6. Moisture detection module; 61. Second oil inlet; 62. Pressure sensor connection port; 63. Oil inlet needle; 64. Reagent bottle; 65. Bottle holder; 66. Liquid level detection device; 67. Magnetic stirrer; 68. Pressure measuring needle.

[0045] 7. Viscosity detection module; 71. Housing; 72. First oil outlet; 73. First oil inlet; 74. Oil passage; 75. Metal ball; 76. Insulation layer; 77. Push-pull electromagnet; 78. Heat-insulating material; 791. Upper proximity switch; 792. Lower proximity switch.

[0046] 8. Control valve, 9. Inlet / outlet oil port box, 10. Control module, 11. Miniature oil pump. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this utility model, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the protection scope of this utility model. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the scope of this utility model.

[0048] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0049] Example:

[0050] like Figures 1-2 As shown, this is a preferred embodiment of the present invention, an oil quality comprehensive testing instrument, including: a chassis 3, a viscosity detection module 7, a moisture detection module 6, a flash point detection module 5, a micro oil pump 11, and a control valve 8.

[0051] The viscosity detection module 7, moisture detection module 6, micro oil pump 11, and control valve 8 are all housed inside the chassis 3; one end of the micro oil pump 11 is connected to the control valve 8, and the other end is connected to an external oil sample bottle; the control valve 8 is connected to both the viscosity detection module 7 and the moisture detection module.

[0052] The housing 3 is equipped with an oil inlet / outlet box 9, which contains an oil inlet and an oil outlet. The micro oil pump 11 is connected to an external oil sample bottle through the oil inlet, and the viscosity detection module 7 is connected to an external oil sample bottle through the oil outlet.

[0053] Combination Figure 3 As shown, the viscosity detection module 7 includes a housing 71, an oil passage 74, a metal ball 75, a position proximity sensor, a push-pull electromagnet 77, a first oil inlet 73, and a first oil outlet 72.

[0054] The outer shell 71 has an oil passage 74 inside, a metal ball 75 inside the oil passage 74, and a push-pull electromagnet 77 at the top of the oil passage 74. The oil passage 74 is integrally formed of metal, with a cuboid exterior and a high-precision cylindrical oil passage inside. The two ends of the passage are made of PEEK material to form plugs.

[0055] One end of the first oil inlet 72 is connected to the bottom of the oil passage 74, and the other end is connected to the control valve 8. The first oil outlet 73 is connected to the top of the oil passage 74 and is located below the push-pull electromagnet 77.

[0056] The proximity sensor includes an upper proximity switch 791 and a lower proximity switch 792. The upper proximity switch 791 is located at the first oil outlet 72, and the lower proximity switch 792 is located at the first oil inlet 73.

[0057] Heat-insulating material 78 is also provided at the first oil inlet 73 and the first oil outlet 72.

[0058] A heat insulation layer 76 is provided between the outer shell 71 and the oil passage 74. A heating film is also closely attached to the outer surface of the oil passage 74, and a temperature sensor is provided inside the oil passage 74.

[0059] The oil sample enters from the bottom of the outer casing 71, lifting the metal ball 75 to the top. A push-pull electromagnet 77 then holds the metal ball 75 in place. The outer casing 71, under the influence of a heating film and controlled by a temperature sensor, maintains a stable temperature at the test value. At this point, the push-pull electromagnet 77 releases the metal ball 75, which then falls within the oil sample. The viscosity value is calculated by measuring the time difference between the metal ball 75 passing the upper and lower proximity switches.

[0060] Adopting an integrated design approach, the viscosity detection module is directly fabricated on the oil passage 74. A heating film of polyimide film is used to cover the testing part of the oil passage 74. An insulation layer is set between the heating film and the outer shell 71 to improve the heat transfer speed and uniformity, and reduce the size and weight of the module.

[0061] The use of a metal proximity switch to determine the passage time of the metal ball 75 improves detection reliability and can adapt to various states of oil samples, such as transparent and opaque. The connection to the bottom and back of the housing with 6 M4 screws helps to resist impact and vibration.

[0062] Combination Figures 4-5The moisture detection module 6 includes a second oil inlet 61, a test chamber, a magnetic stirrer 67, a pressure sensor, a reagent bottle 64, an oil inlet needle 63, and a pressure measuring needle 68.

[0063] One end of the second oil inlet 61 is connected to the control valve 8, and the other end is connected to the test chamber. The test chamber is connected to a pressure sensor through a pressure sensor connection port 62. The bottom of the test chamber is connected to an oil inlet needle 63 and a pressure measuring needle 68. A reagent bottle is placed below the oil inlet needle. The pressure measuring needle 68 is connected to the pressure sensor. The reagent bottle 64 is placed on a bottle holder 65, and a magnetic stirrer 67 is placed at the bottom of the bottle holder 65. In some embodiments, a liquid level detection device 66 may also be provided on the bottle holder or the reagent bottle.

[0064] Combination Figure 7 As shown, the reagent bottle 64 in the moisture detection module 6 is also connected to the external atmosphere through a pipeline, and a two-way solenoid valve is installed on the pipeline.

[0065] The chemical pressure method is used. After the oil sample to be tested enters reagent bottle 64, it reacts chemically with the calcium hydride reagent in the bottle: H2O + CaH2 → H2 + Ca(OH)2. The hydrogen gas generated by the reaction increases the gas pressure in the closed space. The pressure difference is detected by a pressure sensor and the water content value is calculated.

[0066] The detection chamber contains a 20mL dedicated reagent bottle 64 containing a trace amount of calcium hydride reaction reagent. The reagent bottle also serves as a waste liquid container, reducing the need for additional testing accessories. The 20mL dedicated vial containing the reagent is a disposable consumable. The installation method uses a pressure-sealed design, which is convenient to operate, securely fixed, and helps resist impact and vibration. The liquid level control device enables precise control of the oil sample volume. A magnetic bead is placed in the reagent bottle 64, which, driven by a bottom magnetic stirrer, allows the oil sample and reagent in the bottle to be fully and quickly mixed, improving testing accuracy and speed.

[0067] The control valve 8 includes a first pinch valve and a second pinch valve; the outlet of the micro oil pump 11 is connected to the viscosity detection module 7 and the moisture detection module 6 respectively through a three-way pipe. The first pinch valve is set on the pipe between the three-way pipe and the viscosity detection module 7, and the second pinch valve is set on the pipe between the three-way pipe and the moisture detection module 6.

[0068] The comprehensive oil quality testing instrument also includes a synchronization valve and an air pump. The outlet of the micro oil pump 11 is connected to the synchronization valve and then to the three-way valve. The synchronization valve is connected to the air pump.

[0069] like Figures 1-2As shown, the comprehensive oil quality testing instrument also includes a flash point detection module 5, which is located on the top inside the casing 3 and is used to detect the flash point value. A quantitative amount of oil sample can be manually injected into the flash point detection module 5 from the top of the casing 3. The flash point value can be quickly determined to be within acceptable limits by combining the results with standard values.

[0070] The flash point detection module 5 operates using the closed-cup flash point detection method, taking the lowest temperature value of the fuel vapor at the high-voltage arc point as the flash point value.

[0071] To prevent the high-voltage circuit from interfering with other detection modules, shielding optimization measures are adopted to separate the flash point detection module 5, especially the high-voltage part. On the other hand, a filter isolation design is carried out, and the working time of the flash point detection module is staggered with that of other modules. Through the above measures, the normal operation and detection accuracy of the detector are ensured.

[0072] To improve the efficiency of flash point detection, a three-stage temperature control mode is adopted. The first stage is full-power heating to raise the oil sample temperature as quickly as possible. The second stage is decelerated heating to ensure uniform heating and prevent temperature overshoot. The third stage is slow heating to reduce the heating step size and ensure more accurate acquisition of the flash point temperature.

[0073] The flash point detection module 5 manually injects the oil sample into the detection oil cup in quantitative form, and removes the oil sample by wiping after the detection is completed.

[0074] The chassis 3 is equipped with a power aviation plug 4 for connecting to a power source. The chassis 3 also has an LCD screen 2 and a control panel 1, through which the control module interacts with the user.

[0075] The comprehensive oil quality testing instrument also includes a control module 10, which is electrically connected to the viscosity detection module 7, the moisture detection module 6, the micro oil pump 11, the control valve 8, the LCD screen 2, and the control panel 1.

[0076] like Figure 6 As shown, during oil sample testing, the micro oil pump 11 draws liquid from the oil sample bottle, activates the first clamp valve, and the oil passes through the viscosity detection module 7, with excess oil circulating back into the oil sample bottle. After the viscosity detection module 7 is full of oil sample, the first clamp valve is de-energized, while the second clamp valve and the two-way solenoid valve are energized, allowing the oil to enter the moisture detection module for simultaneous viscosity testing. When the oil sample in the reagent bottle 64 reaches a preset height, the second clamp valve and the two-way solenoid valve are de-energized, and the moisture test is performed.

[0077] After testing Figure 7As shown, the first and second clamp valves are energized, and the micro oil pump reverses direction, drawing the oil in the pipeline back into the oil sample bottle. The air pump and synchronization valve are energized, the first clamp valve is energized, and the second clamp valve is de-energized, cleaning the oil circuit of the viscosity detection module via the air pump. Then, the second clamp valve is energized again, and the first clamp valve is de-energized, cleaning the oil circuit of the moisture detection module via the air pump.

[0078] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A comprehensive oil quality testing instrument, characterized in that, include: Chassis, viscosity detection module, moisture detection module, flash point detection module, miniature oil pump, control valve; The viscosity detection module, moisture detection module, flash point detection module, micro oil pump, and control valve are all housed inside the chassis; one end of the micro oil pump is connected to the control valve, and the other end is connected to an external oil sample bottle; the control valve is connected to both the viscosity detection module and the moisture detection module. The chassis is equipped with an oil inlet and an oil outlet. The micro oil pump is connected to an external oil sample bottle through the oil inlet, and the viscosity detection module is connected to an external oil sample bottle through the oil outlet.

2. The comprehensive oil quality testing instrument according to claim 1, characterized in that, The viscosity detection module includes a housing, an oil passage, a metal ball, a position proximity sensor, a push-pull electromagnet, a first oil inlet, and a first oil outlet; The outer casing has an oil passage inside, a metal ball is installed inside the oil passage, and a push-pull electromagnet is installed at the top of the oil passage. One end of the first oil inlet is connected to the bottom of the oil passage, and the other end is connected to the control valve. The first oil outlet is connected to the top of the oil passage and is located below the push-pull electromagnet. The proximity sensor includes an upper proximity switch and a lower proximity switch. The upper proximity switch is located at the first oil outlet, and the lower proximity switch is located at the first oil inlet.

3. The comprehensive oil quality testing instrument according to claim 2, characterized in that, An insulation layer is provided between the outer shell and the oil passage, a heating film is provided on the outside of the oil passage, and a temperature sensor is provided inside the oil passage.

4. The comprehensive oil quality testing instrument according to claim 1, characterized in that, The moisture detection module includes a second oil inlet, a test chamber, a stirrer, a pressure sensor, a reagent bottle, and an oil inlet needle. One end of the second oil inlet is connected to a control valve, and the other end is connected to a test chamber. A pressure sensor is also installed on the test chamber. The bottom of the test chamber is connected to an oil inlet needle, and a reagent bottle is installed below the oil inlet needle. The reagent bottle is installed on a stirrer.

5. The comprehensive oil quality testing instrument according to claim 1, characterized in that, The control valve includes a first pinch valve and a second pinch valve; the outlet of the micro oil pump is connected to the viscosity detection module and the moisture detection module respectively through a three-way pipe, the first pinch valve is set on the pipe between the three-way pipe and the viscosity detection module, and the second pinch valve is set on the pipe between the three-way pipe and the moisture detection module.

6. The comprehensive oil quality testing instrument according to claim 5, characterized in that, The comprehensive oil quality testing instrument also includes a synchronization valve and an air pump. The outlet of the micro oil pump is connected to the synchronization valve and then to the three-way valve. The synchronization valve is connected to the air pump.

7. The comprehensive oil quality testing instrument according to claim 1, characterized in that, The flash point detection module is located on the top inside the chassis and is used to detect the flash point value.

8. The comprehensive oil quality testing instrument according to claim 1, characterized in that, The chassis is equipped with an aviation power connector for connecting to a power source.

9. The comprehensive oil quality testing instrument according to claim 1, characterized in that, The chassis is equipped with an LCD screen and a control panel.

10. The comprehensive oil quality testing instrument according to claim 9, characterized in that, The comprehensive oil quality testing instrument also includes a control module, which is electrically connected to the viscosity testing module, the moisture testing module, the micro oil pump, the control valve, the LCD screen, and the control panel.

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