Device for automatically measuring demulsification degree of oil product

Abstract

The invention discloses an automatic measuring device for the demulsification degree of an oil product, and belongs to the technical field of demulsification degree detection. Comprising an upper shell, a working condition simulator and an oil pan, the upper shell is erected above the oil pan and is communicated with the oil pan, and the working condition simulator is arranged in the upper shell. The bottom of the oil pan is communicated with an oil pump through a pipeline, and an oil outlet of the oil pump is connected with the working condition simulator through an oil supply pipe. An observation window is arranged on the side face of the oil pan, a camera is arranged outside the observation window, and the camera shoots the internal condition of the oil pan through the observation window. The device can simulate the practical working condition of an oil product, so that the demulsification degree measurement of the oil product is closer to the practical working condition, and the measurement precision is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of demulsification degree detection, and in particular relates to an automatic determination device for the demulsification degree of oil products. Background Art

[0002] Demulsification is a key indicator to measure the ability of oil to separate quickly after mixing with water, and is directly related to the stability and safety of the lubrication system of industrial equipment. If oil is emulsified with water during use, a stable emulsion will be formed. The emulsion will destroy the integrity of the oil film, increase mechanical friction and wear, and cause bearing overheating or abnormal equipment shutdown. It will also promote oxidation reactions, leading to increased acid value, sludge formation, and shortening the service life of oil products. Emulsified oil deposits block pipelines, causing insufficient oil supply and threatening the normal operation of equipment. Long-term retention of water causes metal corrosion and reduces equipment reliability. Therefore, in order to determine the separation ability of oil and water after mixing, it is necessary to test the demulsification degree of the oil.

[0003] At present, the mainstream testing methods for oil demulsification can be divided into two categories: laboratory standard test and dynamic simulation test:

[0004] ‌Laboratory standard test method‌: Mix the oil sample and distilled water in proportion, stir mechanically to form an emulsion, and then let it stand, and record the time required for the volume of the emulsion at the oil-water interface to be ≤3mL. This method is simple to operate, but relies on manual observation and recording of the separation process‌.

[0005] Rotary Pressure Vessel Oxidation Test: simulates oil oxidation conditions through high temperature and high pressure environment, and evaluates anti-emulsification performance in combination with water intrusion test. It is suitable for testing synthetic oils containing additives.

[0006] Gravity separation method: Utilizes the density difference between oil and water to indirectly evaluate the demulsification ability through sedimentation rate, and is often used for rapid screening tests.

[0007] Dynamic simulation test method: Reproduce the actual working conditions of oil products (such as temperature, water flow rate, mechanical shear force) in the experimental device, monitor the dynamic process of emulsion formation and separation, and be closer to the actual use environment.

[0008] ‌High temperature and high pressure accelerated method‌: Accelerate oil-water emulsification and separation through extreme conditions (such as 150°C, 10MPa), shorten the detection cycle, but the equipment cost is relatively high.

[0009] Although the existing technology has formed a relatively complete detection system, it still has the defects of high manual dependence and insufficient dynamic simulation. The separation endpoint needs to be determined visually, which is easy to introduce subjective errors and has poor repeatability. Laboratory static testing cannot fully reproduce the complex working conditions such as mechanical vibration and temperature fluctuations during equipment operation, resulting in deviations between the test results and actual performance. Summary of the invention

[0010] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an automatic measuring device for the demulsification degree of oil products. The present invention can simulate the actual practical working conditions of oil products, so that the measurement of the demulsification degree of oil products is closer to the actual working conditions and the measurement accuracy is higher.

[0011] The technical solution adopted by the present invention to solve the problems existing in the prior art is:

[0012] The automatic measuring device for oil demulsification degree comprises an upper shell, a working condition simulator and an oil pan, wherein the upper shell is mounted above the oil pan, the two are connected through-connected, and the working condition simulator is arranged inside the upper shell.

[0013] The bottom of the oil pan is connected to an oil pump through a pipeline, and the oil outlet of the oil pump is connected to the working condition simulator through an oil supply pipe.

[0014] An observation window is provided on the side of the oil pan, and a camera is provided outside the observation window. The camera photographs the internal conditions of the oil pan through the observation window.

[0015] Preferably, the bottom surface of the oil pan includes an inclined surface area and an oil storage groove, and the oil storage groove is arranged at the lower end of the inclined surface area.

[0016] The oil inlet pipe of the oil pump is connected with the bottom of the oil storage groove, and the observation window is vertically arranged on the side of the oil storage groove.

[0017] Preferably, a drain pipe is provided on the bottom surface of the oil storage groove, and a stop valve is connected in series to the drain pipe.

[0018] Preferably, a slide rail is provided parallel to the outer side of the observation window, and the camera is connected to the sliding part of the slide rail.

[0019] Preferably, a support plate is provided between the oil pan and the upper shell, a plurality of oil leakage holes are provided on the support plate, and the operating condition simulator is arranged on the support plate.

[0020] Preferably, the working condition simulator includes a rotating joint, a first driven gear, a driving gear and a motor.

[0021] The first driven gear is meshed and connected with the driving gear, the motor is fixedly arranged outside the upper shell, and the output shaft of the motor is coaxially and fixedly connected with the driving gear.

[0022] The rotating joint is rotationally connected to the first driven gear. The first driven gear is provided with a plurality of third through holes arranged along its radial direction. The inner ports of the third through holes are through-connected with the oil outlet end of the rotating joint, and the outer ports of the third through holes are located on the tooth surface of the first driven gear.

[0023] The oil inlet end of the rotary joint is connected with the oil supply pipe.

[0024] Preferably, the first driven gear is meshingly connected with the second driven gear, a bearing seat is provided on the support plate, and the rotating shafts of the first driven gear, the driving gear and the second driven gear are all rotatably connected to the bearing seat.

[0025] Preferably, the oil outlet end of the rotary joint is connected to an intermediate body, the intermediate body includes a coaxially connected rotating shaft and a connecting pipe, the connecting pipe is detachably connected to the rotary joint, an oil chamber is provided at the connection between the rotating shaft and the connecting pipe, and a first through hole is provided on the outer wall of the oil chamber.

[0026] An outer sleeve is sleeved on the outside of the rotating shaft, the inner wall of the outer sleeve is spaced apart from the outer wall of the rotating shaft, and the first through hole connects the oil cavity with the cavity between the outer sleeve and the rotating shaft.

[0027] The first driven gear is sleeved on one end of the outer sleeve away from the rotating joint. The outer sleeve is provided with a second through hole, and the second through hole is connected with the third through hole.

[0028] Preferably, the outer sleeve is truncated cone-shaped, and the gap between the outer sleeve and the rotating shaft gradually decreases from the first through hole to the third through hole.

[0029] Preferably, the rotating shaft is located at one end of the connecting tube and an annular rear baffle is sleeved on the outside, and the end of the outer sleeve is in contact with the rear baffle.

[0030] The rotating shaft is coaxially plugged with the outer sleeve, and the end surface of the outer sleeve away from the rotating joint is fixedly connected to the rotating shaft through a connecting bolt.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) Dynamic working conditions are reproduced through the gear meshing transmission system of the driving gear + double driven gear. The dynamic oil film pressure is generated by the gap of the tapered outer sleeve to reproduce the squeezing effect between the bearing bushings. The stepless speed change of the motor drive system covers the equipment start-stop, full load, idling and other working conditions. The heating device can achieve precise control of the oil temperature of 40-120℃ and synchronously simulate the mechanical friction heat generation conditions. The tooth surface impact spray is realized through the third through hole, and the splash is driven by the gear to reproduce the splash atomization state of the gearbox oil. The oil pump supports 4-20L / min flow adjustment to match the circulation requirements of oils with different viscosities.

[0033] (2) The camera cooperates with the electric slide rail to realize the three-dimensional reconstruction of the oil-water interface. The measurement error of the separation layer is less than 0.5%. The inclined oil storage tank + transparent observation window design ensures more than 98% coverage of the visible area and supports the 40-minute full process recording required by the ASTM D1401 standard.

[0034] (3) The multi-stage flushing system of cleaning agent → pure water → hot air makes the residual oil amount less than 0.1ml and ensures that the cross-contamination rate between batches is less than 0.05%. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0036] Figure 1 This is the first structural diagram of an automatic measuring device for the demulsification degree of oil products in this application.

[0037] Figure 2 This is the second structural diagram of an automatic measuring device for the demulsification degree of oil products in this application.

[0038] Figure 3 This is a side view of an automatic measuring device for the demulsification degree of oil products in this application.

[0039] Figure 4 This is a partial cross-sectional view of an automatic measuring device for the demulsification degree of oil products according to the present application.

[0040] Figure 5 This is a diagram of the internal structure of an automatic oil demulsification test device after removing the upper shell.

[0041] Figure 6 This is a structural diagram of a working condition simulator in an automatic oil demulsification degree determination device for this application.

[0042] Figure 7 for Figure 6 An exploded diagram of

[0043] Figure 8 for Figure 6 sectional view of .

[0044] In the figure: 1-rotating joint, 2-intermediate body, 201-rotating shaft, 202-connecting pipe, 203-oil chamber, 204-rear baffle, 205-first through hole, 3-outer sleeve, 301-support pipe, 302-second through hole, 4-first driven gear, 401-third through hole, 5-connecting bolt, 6-driving gear, 7-motor, 8-second driven gear, 9-bearing seat, 10-bearing seat upper cover, 11-support plate, 1101-oil leakage port, 12-oil pan, 1201-inclined area, 1202-oil storage groove, 1203-observation window, 13-oil pump, 14-three-way valve, 15-oil supply pipe, 16-flushing pipe, 17-drain pipe, 18-upper shell, 19-upper cover, 20-slide rail, 21-camera. DETAILED DESCRIPTION

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the technical field of the present application. The terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit the present application embodiments.

[0046] In addition, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used in the specification and claims of the present invention to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the drawings. Therefore, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0047] The following is a further detailed description of an automatic measuring device for the demulsification degree of oil products according to the present invention in conjunction with the accompanying drawings.

[0048] Depend on Figures 1 to 8 As shown, an automatic measuring device for the demulsification degree of oil products includes an upper shell 18, a working condition simulator and an oil pan 12. The upper shell 18 is mounted above the oil pan 12. The upper end of the oil pan 12 is open, and the two are connected through. The working condition simulator is arranged inside the upper shell 18.

[0049] The bottom of the oil pan 12 is connected to an oil pump 13 through a pipeline, and the oil outlet of the oil pump 13 is connected to the operating condition simulator through an oil supply pipe 15.

[0050] An observation window 1203 is provided on the side of the oil pan 12 , and a camera 21 is provided outside the observation window 1203 . The camera 21 photographs the internal situation of the oil pan 12 through the observation window 1203 .

[0051] Furthermore, the bottom surface of the oil pan 12 includes an inclined surface area 1201 and an oil storage groove 1202, and the oil storage groove 1202 is arranged at the lower end of the inclined surface area 1201. The oil inlet pipe of the oil pump 13 is connected to the bottom of the oil storage groove 1202, and the observation window 1203 is vertically arranged on the side of the oil storage groove 1202.

[0052] A drain pipe 17 is disposed on the bottom surface of the oil storage groove 1202 , and a stop valve is connected in series to the drain pipe 17 .

[0053] When measuring the demulsification degree of oil products, a certain amount of oil products and water are first poured in through the upper opening of the upper shell 18, and the oil products and water flow into the oil storage groove 1202 of the oil pan 12. The oil pump 13 is started, and the oil-water mixture in the oil storage groove 1202 is pumped into the working condition simulator through the oil supply pipe 15. The oil-water mixture simulates the actual working state of the oil products in the working condition simulator, and flows back to the oil storage groove 1202 after completing a working cycle. When the number of working cycles reaches the threshold at night, the oil pump 13 is turned off, the oil-water mixture is stationary, and the timing is started at the same time. The oil-water separation is observed through the camera 21, and the demulsification degree of the oil products is measured.

[0054] In order to observe the oil and water levels at different heights, a slide rail 20 is arranged parallel to the outer side of the observation window 1203, and the camera 21 is connected to the sliding part of the slide rail 20. The slide rail 20 adopts an electric linear module, and both the slide rail 20 and the camera 21 are prior art.

[0055] After the oil quality measurement is completed, the stop valve on the drain pipe 17 is opened, and the oil-water mixture inside the oil storage groove 1202 is discharged through the drain pipe 17. Since the oil has a certain viscosity, some oil will remain inside the working condition simulator, the oil pan 12, and the upper shell 18. In order to clean it up and not affect the next oil quality measurement. In this embodiment, the oil outlet pipe of the oil pump 13 is connected to the three-way valve 14, and the other two ports of the three-way valve 14 are connected to the oil supply pipe 15 and the flushing pipe 16 respectively.

[0056] The top opening of the upper shell 18 is covered with a detachable upper cover plate 19. After the oil quality measurement is completed and the drain pipe 17 is emptied, the flushing pipe 16 is connected to the high-pressure cleaning agent pipeline or the high-pressure water pipeline or the high-pressure gas pipeline, and the connection direction of the three-way valve 14 is changed so that the flushing pipe 16 is connected to the oil supply pipe 15.

[0057] In order to optimize the cleaning effect, in this embodiment, the flushing pipeline 16 is connected to the high-pressure cleaning agent pipeline, the high-pressure water pipeline and the high-pressure gas pipeline through the stop valve. When flushing, first inject the high-pressure cleaning agent, which can decompose the oil stains and flush the oil remaining inside the working condition simulator, the oil pan 12 and the shell 18. Then connect it to the high-pressure water pipeline to flush the residual cleaning agent. Finally, connect it to the high-pressure gas pipeline and dry it with high-pressure gas. A heater is connected in series on the high-pressure gas pipeline to optimize the drying effect.

[0058] In order to facilitate the installation of the working condition simulator, a support plate 11 is provided between the oil pan 12 and the upper shell 18 , and a plurality of oil leakage holes 1101 are provided on the support plate 11 . The working condition simulator is arranged on the support plate 11 .

[0059] In this embodiment, Figures 6 to 8As shown, the working condition simulator includes a rotating joint 1, a first driven gear 4, a driving gear 6 and a motor 7.

[0060] The first driven gear 4 is meshedly connected with the driving gear 6 , the motor 7 is fixedly arranged outside the upper housing 18 , and the output shaft of the motor 17 is coaxially fixedly connected with the driving gear 6 .

[0061] The rotary joint 1 is rotatably connected to the first driven gear 4. The first driven gear 4 is provided with a plurality of third through holes 401 arranged along its radial direction. The inner ports of the third through holes 401 are connected to the oil outlet of the rotary joint 1. The outer ports of the third through holes 401 are located on the tooth surface of the first driven gear 4. The oil inlet of the rotary joint 1 is connected to the oil supply pipe 15.

[0062] The first driven gear 4 is meshedly connected with the second driven gear 8 , a bearing seat 9 is provided on the support plate 11 , and the rotating shafts of the first driven gear 4 , the driving gear 6 and the second driven gear 8 are all rotatably connected with the bearing seat 9 .

[0063] The oil outlet end of the rotating joint 1 is connected to an intermediate body 2, which includes a coaxially connected rotating shaft 201 and a connecting pipe 202. The connecting pipe 202 is detachably connected to the rotating joint 1. An oil chamber 203 is provided at the connection between the rotating shaft 201 and the connecting pipe 202, and a first through hole 205 is provided on the outer wall of the oil chamber 203.

[0064] The outer sleeve 3 is sleeved on the rotating shaft 201 , and the inner wall of the outer sleeve 3 is spaced apart from the outer wall of the rotating shaft 201 . The first through hole 205 connects the oil chamber 203 with the cavity between the outer sleeve 3 and the rotating shaft 201 .

[0065] The first driven gear 4 is sleeved on one end of the outer sleeve 3 away from the rotary joint 1 . The outer sleeve 3 is provided with a second through hole 302 . The second through hole 302 is connected to the third through hole 401 .

[0066] The outer sleeve 3 is truncated cone-shaped, and the gap between the outer sleeve 3 and the rotating shaft 201 gradually decreases from the first through hole 205 to the third through hole 401.

[0067] The oil-water mixture enters the rotating joint 1 through the oil supply pipe 15, then enters the oil chamber 203 through the connecting pipe 202, and then enters the gap between the outer sleeve 3 and the rotating shaft 201 through the first through hole 205. The space gradually decreases and the oil-water mixture is squeezed, simulating the working condition between the bearing bushings.

[0068] The oil-water mixture finally flows into the tooth surface of the first driven gear 4 through the second through hole 302 and the third through hole 401 to lubricate the gear meshing part, simulating the actual working condition. Finally, splashing and collision will occur, so that the measuring environment of the oil demulsification degree is consistent with the environment of the actual working condition.

[0069] An electric heating device may also be provided inside the oil storage groove 1202 to continuously heat the oil during the process of simulating the actual working condition, which is closer to the actual working condition.

[0070] In order to improve the sealing effect between the outer sleeve 3 and the intermediate body 2, the rotating shaft 201 is provided with an annular rear baffle 204 outside one end of the connecting tube 202, and the end of the outer sleeve 3 abuts against the rear baffle 204, and a rubber pad can be added between the two.

[0071] The rotating shaft 201 is coaxially plugged with the outer sleeve 3, and the end face of the outer sleeve 3 away from the rotating joint 1 is fixedly connected to the rotating shaft 201 through the connecting bolt 5. A support tube 301 is coaxially arranged outside the outer sleeve 3 at this end, and the bolt 5 is arranged inside the city tube 301, and the support tube 301 is rotatably connected to the bearing seat 9.

[0072] For ease of installation, the rotating hole on the bearing seat 9 is semicircular, and a bearing seat cover 10 is detachably connected to the top of the bearing seat 9 by bolts. A semicircular rotating hole is provided on the bottom surface of the bearing seat cover 10, which is connected with the bearing seat 9 to form a complete rotating hole for supporting the support tube 301 and the rotating shaft of the driving gear and the second driven gear.

[0073] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Automatic determination device for oil demulsification degree, characterized by: It comprises an upper housing (18), a working condition simulator and an oil pan (12), wherein the upper housing (18) is mounted above the oil pan (12), the two are connected in a through-connection manner, and the working condition simulator is arranged inside the upper housing (18); The bottom of the oil pan (12) is connected to an oil pump (13) via a pipeline, and the oil outlet of the oil pump (13) is connected to the working condition simulator via an oil supply pipe (15); An observation window (1203) is provided on the side of the oil pan (12), and a camera (21) is provided outside the observation window (1203). The camera (21) photographs the internal conditions of the oil pan (12) through the observation window (1203).

2. The automatic measuring device for oil demulsification degree according to claim 1, characterized in that: The bottom surface of the oil pan (12) comprises an inclined surface area (1201) and an oil storage groove (1202), and the oil storage groove (1202) is arranged at the lower end of the inclined surface area (1201); The oil inlet pipe of the oil pump (13) is connected to the bottom of the oil storage groove (1202), and the observation window (1203) is vertically arranged on the side of the oil storage groove (1202).

3. The automatic measuring device for oil demulsification degree according to claim 1 or 2, characterized in that: A drain pipe (17) is provided on the bottom surface of the oil storage groove (1202), and a stop valve is connected in series to the drain pipe (17).

4. The automatic measuring device for oil demulsification degree according to claim 1 or 2, characterized in that: A slide rail (20) is provided parallel to the outer side of the observation window (1203), and the camera (21) is connected to the sliding part of the slide rail (20).

5. The automatic measuring device for oil demulsification degree according to claim 4, characterized in that: A support plate (11) is provided between the oil pan (12) and the upper shell (18), a plurality of oil leakage holes (1101) are provided on the support plate (11), and the operating condition simulator is arranged on the support plate (11).

6. The automatic measuring device for oil demulsification degree according to claim 5, characterized in that: The working condition simulator comprises a rotary joint (1), a first driven gear (4), a driving gear (6) and a motor (7); The first driven gear (4) is meshingly connected with the driving gear (6), the motor (7) is fixedly arranged outside the upper housing (18), and the output shaft of the motor (17) is coaxially fixedly connected with the driving gear (6); The rotary joint (1) is rotatably connected to the first driven gear (4); the first driven gear (4) is provided with a plurality of third through holes (401) arranged along its radial direction; the inner ports of the third through holes (401) are through-connected to the oil outlet end of the rotary joint (1); and the outer ports of the third through holes (401) are located on the tooth surface of the first driven gear (4); The oil inlet end of the rotary joint (1) is connected to the oil supply pipe 15.

7. The automatic measuring device for oil demulsification degree according to claim 6, characterized in that: The first driven gear (4) is meshingly connected with the second driven gear (8), a bearing seat (9) is provided on the support plate (11), and the rotating shafts of the first driven gear (4), the driving gear (6) and the second driven gear (8) are all rotatably connected to the bearing seat (9).

8. The automatic measuring device for oil demulsification degree according to claim 6 or 7, characterized in that: The oil outlet end of the rotary joint (1) is connected to an intermediate body (2), the intermediate body (2) comprises a rotating shaft (201) and a connecting pipe (202) which are coaxially connected, the connecting pipe (202) and the rotary joint (1) are detachably connected, an oil chamber (203) is provided at the connection between the rotating shaft (201) and the connecting pipe (202), and a first through hole (205) is provided on the outer wall of the oil chamber (203); The rotating shaft (201) is sleeved with an outer sleeve (3) on the outside, the inner wall of the outer sleeve (3) and the outer wall of the rotating shaft (201) are spaced apart, and the first through hole (205) connects the oil chamber (203) with the cavity between the outer sleeve (3) and the rotating shaft (201); The first driven gear (4) is sleeved on an end of the outer sleeve (3) away from the rotary joint (1); the outer sleeve (3) is provided with a second through hole (302); and the second through hole (302) is connected to the third through hole (401).

9. The automatic measuring device for oil demulsification degree according to claim 8, characterized in that: The outer sleeve (3) is in the shape of a truncated cone, and the gap between the outer sleeve (3) and the rotating shaft (201) gradually decreases from the point where the first through hole (205) passes through to the point where the third through hole (401) passes through.

10. The automatic measuring device for oil demulsification degree according to claim 8, characterized in that: The rotating shaft (201) is located at one end of the connecting tube (202) and is sleeved with an annular rear baffle (204), and the end of the outer sleeve (3) is in contact with the rear baffle (204); The rotating shaft (201) is coaxially plugged into the outer sleeve (3), and the end surface of the outer sleeve (3) away from the rotating joint (1) is fixedly connected to the rotating shaft (201) via a connecting bolt (5).

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