Device and method for detecting blended oil quality by capillary method

Abstract

The invention discloses a device and a method for detecting blended oil quality by a capillary method, the device comprises a platform, a capillary frame and a capillary group, the bottom of the platform is provided with support legs, the upper surface of the platform is provided with a gradienter, and the gradienter is matched with the support legs for use and used for keeping the platform in a horizontal state; the platform comprises an overflow groove formed in the upper surface and an analysis liquid groove group, the analysis liquid groove group is located in the overflow groove, flow guide grooves are formed in the two sides of the analysis liquid groove group, and the capillary tube is erected on the upper surface of the platform. According to the device and method for detecting the quality of blended oil by using the capillary method, blended oil, standard oil and oil to be detected in different proportions are injected into an analysis liquid tank group, the analysis liquid tank group is filled with droppers, then a capillary group is inserted, the bottom end of the capillary group extends into the analysis liquid tank group, and the quality of the blended oil is detected by using the principle of the capillary method. And comparing the rising heights of the oil to be detected with other conditioning oil and standard oil on the liquid level of the capillary group so as to detect the concentration of the oil to be detected.

Description

Technical Field

[0001] The invention relates to the field of chemical detection, and in particular to a device and a method for detecting oil blending quality by using a capillary method. Background Art

[0002] Biodiesel has significant environmental protection characteristics and low sulfur content, so the emissions of sulfur dioxide and sulfides are low; biodiesel does not contain aromatic hydrocarbons and causes less damage to the environment and human body than traditional diesel; it has good biodegradability, and the degradation rate is twice that of ordinary diesel; the lubrication performance of biodiesel is better than that of traditional diesel, which helps to reduce engine wear; it has high safety performance and a higher flash point than traditional diesel, and it is not a dangerous good; it has a high cetane number and good combustibility, which helps to improve engine efficiency; compared with traditional diesel, the calorific value of biodiesel is slightly lower, but the addition of oxygen promotes combustion, which to a certain extent makes up for the difference in calorific value.

[0003] Adding a certain amount of biodiesel to petrochemical diesel is in line with the country's policy of reducing carbon emissions and is an environmental protection measure encouraged by the country. However, after biodiesel and petrochemical diesel are mixed and left for a long time, stratification will occur, affecting the use of the oil.

[0004] The quality of blending oil can be tested by gas chromatograph or high performance liquid chromatograph, but its structure is complicated and the cost is high. In order to quickly and easily detect the quality of blending oil, we propose a device and method for detecting the quality of blending oil by capillary method. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a device for detecting the quality of oil blending by a capillary method, which solves the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention is implemented by the following technical scheme: comprising a platform, a capillary rack and a capillary group, the bottom of the platform is provided with a support foot, the upper surface of the platform is provided with a level meter, and is used in conjunction with the support foot to keep the platform in a horizontal state; The platform includes an overflow trough and an analysis liquid trough group opened on the upper surface, wherein the analysis liquid trough group is inside the overflow trough, and guide grooves are opened on both sides of the analysis liquid trough group. The capillary rack is arranged on the upper surface of the platform, and the capillary group is arranged inside the capillary rack, and a cleaning component for cleaning the capillary group is arranged on the surface of the capillary rack.

[0007] The present invention has the following beneficial effects: The device and method for detecting the quality of blended oil by capillary method, injects blended oil, standard oil and oil to be tested in different proportions into the analysis tank group, fills the analysis tank group with a dropper, and then inserts the capillary group so that its bottom extends into the analysis tank group, and compares the height of the oil to be tested with other blended oils and standard oils in the capillary group liquid surface by the principle of capillary method, so as to detect the concentration of the oil to be tested; the cleaning component arranged on the surface of the capillary rack can quickly clean the capillary group, which is convenient for increasing the detection efficiency of the capillary group for different types of blended oils, and at the same time, the structure is simple and convenient for detection; 2. A device and method for detecting the quality of blended oil by capillary method. The first, second and third liquid storage chambers can store the oil to be tested, standard oil and oils of different concentrations. The first and second drive rods can be driven to rotate by the drive block and the transmission belt, so as to facilitate the uniform mixing of the oil inside the blending cylinder. The oil is discharged into the analysis tank group through the guide pipe, so as to speed up the detection efficiency of the blended oil. 3. The device and method for detecting the quality of blended oil by the capillary method can make the platform in a horizontal state by using the supporting feet and the level meter at the bottom of the platform in coordination with each other, thereby maintaining the accuracy of the blended oil detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the decomposition structure of the present invention; Figure 3 It is a schematic diagram of the structure of the mixing cylinder of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the mixing tube of the present invention; Figure 5 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 6 This is a schematic diagram of the cross-sectional structure of the support plate of the present invention; Figure 7 For the present invention Figure 2 Enlarged structural diagram at B in the middle.

[0009] Among them, 1. platform; 2. horizontal plate; 3. capillary group; 4. support foot; 5. level; 6. overflow trough; 7. analysis liquid tank group; 8. rubber ring; 9. side plate; 10. mixing cylinder; 11. feeding cylinder; 12. protective shell; 13. driving rod one; 14. driving rod two; 15. conveyor belt; 16. guide tube; 17. control valve; 18. threaded column; 19. nut; 20. guide trough; 21. support rod; 22. liquid storage chamber one; 23. liquid storage chamber two; 24. liquid storage chamber three; 25. driving block; 26. support plate; 27. cleaning cylinder; 28. gear; 29. ​​auxiliary ring; 30. elbow; 31. water outlet; 32. bristles; 33. water inlet pipe. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] See also Figures 1 to 7 , the present invention discloses a device for detecting the quality of oil blending by using a capillary method; It includes a platform 1, a capillary rack and a capillary group 3. The bottom of the platform 1 is provided with a support leg 4. The upper surface of the platform 1 is provided with a level 5, which is used in conjunction with the support leg 4 to keep the platform 1 in a horizontal state. The platform 1 includes an overflow trough 6 and an analysis liquid trough group 7 opened on the upper surface, wherein the analysis liquid trough group 7 is inside the overflow trough 6, and guide grooves 20 are opened on both sides of the analysis liquid trough group 7. The capillary rack is arranged on the upper surface of the platform 1, and the capillary group 3 is arranged inside the capillary rack 2, and a cleaning component for cleaning the capillary group 3 is provided on the surface of the capillary rack.

[0012] like Figure 2 As shown, there are two levels 5, which are arranged at different positions. By cooperating with the support feet 4, the platform 1 is kept in a horizontal state to maintain the accuracy of detection.

[0013] A rubber ring 8 is provided at the portion where the capillary rack contacts the outer wall of the capillary group 3, which can maintain the stability of the capillary group 3 when in use. A side plate 9 is fixedly connected to the back of the capillary rack, and a mixing cylinder 10 is slidably connected to the inside of the side plate 9. A stirring assembly is provided inside the mixing cylinder 10, and a feed cylinder 11 is fixedly connected to the upper surface of the mixing cylinder 10. Oil can be injected into the interior of the liquid storage chamber 1 22, the liquid storage chamber 23 and the liquid storage chamber 3 24 through the feed cylinder 11. Among them, the interior of the liquid storage chamber 1 22 stores the oil to be tested, the interior of the liquid storage chamber 23 stores the standard oil, and the interior of the liquid storage chamber 3 24 stores oils with different ratios.

[0014] A slide is provided on the back of the side plate 9, and a protrusion is provided at the portion where the mixing cylinder 10 is connected to the side plate 9, wherein the protrusion is slidably connected to the inside of the slide. The purpose of such a setting is to facilitate adjustment of its use position and to facilitate disassembly.

[0015] Capillary method; The capillary method uses the principle of capillary phenomenon, that is, the phenomenon that liquid rises or falls in a capillary tube due to the effect of surface tension. This method has a simple device and is easy to operate, so it is widely used in laboratories and industrial production. Through this method, the surface tension of various liquids can be measured, which is of great significance for understanding liquid properties, controlling product quality, and developing new products. When we use the capillary rise method to measure the surface tension of liquids, its basic principle is as follows; When a capillary tube is carefully inserted into a liquid, the liquid will be adsorbed and rise inside the tube. When the liquid rises to a certain height, the pressure of the liquid inside and outside the capillary tube is balanced, and the liquid will no longer continue to rise. This equilibrium state reveals the role of surface tension, that is, the upward pull of the liquid on itself is balanced with the downward pressure generated by the liquid's own weight.

[0016] The calculation formula of surface tension is: Surface tension (γ) can be calculated using the following formula: γ = ρ * g * h * r / (2 * cosθ), where γ represents the surface tension, r is the radius of the capillary, ρ is the density of the measured liquid, g is the local gravitational acceleration, and θ is the contact angle between the liquid and the tube wall.

[0017] The above formula shows the relationship between surface tension and these physical quantities. Liquids with different components have different surface tensions, which is reflected in the capillary as the difference in the height h of the liquid rising in the capillary. This difference can be used to determine whether the quality of the oil blending meets the requirements and whether the quality of the oil blending has changed.

[0018] The present application also discloses a method for detecting the quality of oil blending by a capillary method, comprising the following steps; S1. Prepare standard oil A in the laboratory, mix thoroughly, add it into the No. 5 tank in the analysis tank group 7, and use a dropper to fill it up so that it overflows from the guide tank 20; S2. Prepare standard oils A-3, A-2, A-1, A+1, A+2, A+3, etc., with decreasing or increasing gradients, and different concentrations of standard oils. After fully mixing, add them into the No. 1-3 tanks and No. 7-9 tanks in the analysis tank group 7 according to the concentration from low to high, and fill them up with a dropper to overflow from the guide tank 20; S3, add the oil B to be tested into the No. 4 and No. 6 tanks in the analysis tank group 7, and fill them up with a dropper to overflow from the guide tank 20, wherein in steps 1-3, the overflowed oil is collected by the overflow tank 6 to reduce the pollution to the platform 1; S4. Compare the heights of the liquid levels in the No. 4 and No. 6 capillary groups with the heights of the liquid levels in the other capillary groups to determine the concentration of the tested blended oil B.

[0019] The number of the capillary groups 3 is 10, and the upper surface of the analysis liquid tank group 7 is provided with 10 corresponding liquid storage tanks for storing the blending oils of different types and concentrations.

[0020] The stirring assembly includes a protective shell 12 fixedly connected to the top of the mixing cylinder 10, a driving rod 13 and a driving rod 14 arranged inside the protective shell 12, and a transmission belt 15 sleeved on the surface of the driving rod 13 and the driving rod 14. The upper surface of the mixing cylinder 10 is provided with a driving block 25 used in conjunction with one of the driving rods 13. The bottom of the mixing cylinder 10 is fixedly connected with a guide tube 16. The part of the guide tube 16 close to the mixing cylinder 10 is threadedly connected with a control valve 17, and the end of the guide tube 16 away from the mixing cylinder 10 is arranged above the analysis liquid tank group 7.

[0021] like Figure 4 As shown, starting the driving block 25 (a motor can be used as a driving source) can drive the driving rod 13 to rotate, and the transmission belt 15 can drive the driving rod 2 14 to rotate synchronously, so as to facilitate the stirring of the oil inside. The guide pipe 16 arranged at the bottom can transport the evenly mixed oil to the inside of the designated analysis liquid tank group 7, and the control valve 17 is used to control the opening and closing of the guide pipe 16.

[0022] The supporting legs 4 are arranged at the four corners of the bottom of the platform 1. The supporting legs 4 include a threaded column 18 inserted into the surface of the platform 1 and a nut 19 threadedly connected to the surface of the threaded column 18. The mixing cylinder 10 includes a liquid storage chamber 1 22, a liquid storage chamber 23 and a liquid storage chamber 3 24 arranged therein. The capillary rack 2 includes a support rod 21 fixedly connected to the upper surface of the platform 1 and a cross plate 2 fixedly connected to the top of the support rod 2. The top and bottom ends of the support rod 21 are detachably connected to the platform 1 and the cross plate 2 by bolts.

[0023] The cleaning assembly includes a support plate 26 sleeved on the surface of the support rod 21, a cleaning cylinder 27 arranged on the upper surface of the support plate 26, and a driving assembly arranged inside the support plate 26; The driving assembly includes a gear 28 arranged inside the support plate 26 and an auxiliary ring 29 fixedly connected to the outer wall of the bottom end of the cleaning cylinder 27 and meshing with the gear 28. A motor for driving the gear 28 to rotate is provided on the upper surface of the support plate 26 near one end of the support rod 21, and a support ring is fixedly connected to the surface of the support rod 21 and the bottom of the support plate 26.

[0024] like Figure 2 As shown, the support ring can support the support plate 26 and can be rotated to the rear when not in use to avoid affecting the use of the capillary tube group 3.

[0025] A curved pipe 30 is inserted at the bottom of the cleaning cylinder 27 , and a water outlet 31 connected to the curved pipe 30 is provided on the inner wall of the cleaning cylinder 27 . Bristles 32 for cleaning the capillary tube group 3 are provided on the inner wall of the cleaning cylinder 27 . A water inlet pipe 33 is sleeved at the bottom end of the curved pipe 30 .

[0026] like Figure 6 and Figure 7 As shown, one end of the water inlet pipe 33 can be connected to an external water pipe. When water flows into the water inlet pipe 33, it is discharged from the inner wall of the cleaning cylinder 27. The bottom of the cleaning cylinder 27 is cross-hollowed, and the cleaned sewage is discharged from the bottom of the support plate 26. After the capillary tube set 3 is used, the outer wall and the inner wall at the bottom thereof will be stained with oil film and need to be disassembled and cleaned. The cleaning method is as follows; When cleaning the capillary group 3, the support plate 26 is rotated so that the cleaning cylinder 27 is located below the capillary group 3, and then the bottom end of the capillary group 3 with the oil film is inserted into the cleaning cylinder 27, and the motor (shown in the figure, not numbered) is started to drive the gear 28 to rotate, and the cleaning cylinder 27 is driven to rotate synchronously, and the brush 32 on the inner wall and the water discharged from the water outlet 31 can be rotated and rinsed at the same time, thereby improving the cleaning efficiency of the capillary group 3.

[0027] In order to facilitate the treatment of sewage after cleaning, a sewage outlet can be opened at the bottom of the platform 1. When the sewage after cleaning enters the overflow tank 6, it is convenient to centrally treat it through the sewage outlet (not shown in the figure).

[0028] like Figure 2 As shown, by rotating the position of the nut 19 on the surface of the threaded column 18, the height of the four corners of the platform 1 can be adjusted, and used in conjunction with the level 5 to check whether the platform 1 is in a horizontal state. The front of the cross plate 2 and the front of the analysis liquid tank group 7 are set with values ​​1-10, corresponding to the 10 capillary groups 3.

[0029] The electrical components appearing in this article are all connected to the external main controller and 220V AC power, and the main controller can be a conventional known device for control such as a computer. The above-mentioned drive block 25 and motor are existing public technologies and are only cited here, and the specific structure will not be described in detail.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the quality of oil blending by capillary method, characterized in that: It comprises a platform (1), a capillary rack and a capillary group (3); the bottom of the platform (1) is provided with a support foot (4); the upper surface of the platform (1) is provided with a level (5) which cooperates with the support foot (4) to keep the platform (1) in a horizontal state; The platform (1) comprises an overflow trough (6) and an analysis liquid trough group (7) provided on the upper surface, wherein the analysis liquid trough group (7) is located inside the overflow trough (6), and guide grooves (20) are provided on both sides of the analysis liquid trough group (7). The capillary tube rack is arranged on the upper surface of the platform (1), the capillary tube group (3) is arranged inside the capillary tube rack, and a cleaning component for cleaning the capillary tube group (3) is provided on the surface of the capillary tube rack.

2. The device for detecting oil blending quality by capillary method according to claim 1, characterized in that: A rubber ring (8) is provided at a portion where the capillary rack contacts the outer wall of the capillary group (3); the capillary rack comprises a support rod (21) fixedly connected to the upper surface of the platform (1) and a horizontal plate (2) fixedly connected to the top of the support rod (21); the top and bottom ends of the support rod (21) are detachably connected to the platform (1) and the horizontal plate (2) by bolts; The cleaning assembly comprises a support plate (26) sleeved on the surface of the support rod (21), a cleaning cylinder (27) arranged on the upper surface of the support plate (26), and a driving assembly arranged inside the support plate (26).

3. The device for detecting oil blending quality by capillary method according to claim 2, characterized in that: The driving assembly comprises a gear (28) arranged inside the support plate (26) and an auxiliary ring (29) fixedly connected to the outer wall of the bottom end of the cleaning cylinder (27) and meshingly connected to the gear (28); a motor for driving the gear (28) to rotate is provided on the upper surface of the support plate (26) near one end of the support rod (21); and a support ring is fixedly connected to the surface of the support rod (21) and below the support plate (26).

4. The device for detecting oil blending quality by capillary method according to claim 3, characterized in that: The back of the capillary rack is fixedly connected to a side plate (9), the interior of the side plate (9) is slidably connected to a mixing cylinder (10), a stirring assembly is provided inside the mixing cylinder (10), and the upper surface of the mixing cylinder (10) is fixedly connected to a feed cylinder (11).

5. The device for detecting oil blending quality by capillary method according to claim 4, characterized in that: The stirring assembly comprises a protective shell (12) fixedly connected to the top of a mixing cylinder (10), a first driving rod (13) and a second driving rod (14) arranged inside the protective shell (12), and a transmission belt (15) sleeved on the surfaces of the first driving rod (13) and the second driving rod (14); and a driving block (25) for use with one of the first driving rods (13) is provided on the upper surface of the mixing cylinder (10).

6. The device for detecting oil blending quality by capillary method according to claim 5, characterized in that: The top ends of the driving rod 1 (13) and the driving rod 2 (14) penetrate the inner top wall of the mixing tube (10) and extend to the inside of the protective shell (12), and the bottom ends thereof extend to the inside of the mixing tube (10).

7. The device for detecting oil blending quality by capillary method according to claim 6, characterized in that: The bottom of the mixing tube (10) is fixedly connected to a flow guide tube (16), a portion of the flow guide tube (16) close to the mixing tube (10) is threadedly connected to a control valve (17), and an end of the flow guide tube (16) away from the mixing tube (10) is arranged above the analysis liquid tank group (7).

8. The device for detecting oil blending quality by capillary method according to claim 1, characterized in that: The support legs (4) are arranged at the four corners of the bottom of the platform (1), and the support legs (4) include a threaded column (18) inserted into the surface of the platform (1) and a nut (19) threadedly connected to the surface of the threaded column (18). The mixing cylinder (10) includes a first liquid storage chamber (22), a second liquid storage chamber (23) and a third liquid storage chamber (24) arranged therein.

9. The device for detecting oil blending quality by capillary method according to claim 2, wherein a curved pipe (30) is inserted into the bottom of the cleaning cylinder (27), the inner wall of the cleaning cylinder (27) is provided with a water outlet (31) connected to the curved pipe (30), the inner wall of the cleaning cylinder (27) is provided with bristles (32) for cleaning the capillary tube group (3), and the bottom end of the curved pipe (30) is provided with a water inlet pipe (33).

10. A method for detecting oil blending quality by capillary method, the device for detecting oil blending quality by capillary method as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1. Prepare standard oil A, mix thoroughly, add it to the designated tank of the analysis tank group (7), and use a dropper to fill it up until it overflows from the guide tank (20); S2. Prepare standard oils A-3, A-2, A-1, A+1, A+2, A+3, with decreasing or increasing gradients, and standard oils of different concentrations. After fully mixing, add them into the designated tank of the analysis tank group (7) in order of concentration from low to high, and use a dropper to fill them up until they overflow from the guide tank (20); S3, add the oil B to be tested into the designated tank of the analysis tank group (7), and use a dropper to fill it up until it overflows from the guide tank (20); S4. Finally, the height of the liquid level rise in the designated tube of the capillary group (3) is compared with the height of the liquid level rise in the remaining capillary groups (3), so as to determine the concentration of the tested blended oil B.

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