An oil monitoring probe with self-cleaning function

Abstract

The present application relates to oil monitoring technical field, specifically to a kind of oil monitoring probe with cleaning function, including oil monitoring probe body, the surface of oil monitoring probe body is sprayed diamond-like composite hydrophobic coating and titanium dioxide photocatalytic decomposition coating, the bottom of oil monitoring probe body is equipped with installation sleeve, the bottom of installation sleeve is equipped with piezoelectric ceramic sheet at outer ring, the bottom of installation sleeve is fixed with ultraviolet light band, the side of oil monitoring probe body is equipped with optical turbidimeter;The switch of ultraviolet light band is triggered to irradiate titanium dioxide photocatalytic decomposition coating, and titanium dioxide photocatalytic decomposition coating catalytic decomposition oil pollution molecule on the surface of oil monitoring probe body;Beneficial effect is: through coating and vibration synergistic mechanism, i.e. coating reduces adhesion, vibration provides peeling kinetic energy, and the combination of the two makes cleaning efficiency improve;And reduce the cleaning cycle of probe, prolong the service life of probe.

Description

Technical Field

[0001] This invention relates to the field of oil monitoring technology, specifically to an oil monitoring probe with a self-cleaning function. Background Technology

[0002] Mechanical impurities (such as metal abrasive particles), oxides, and oil stains in the oil adhere to the probe surface, causing a decrease in the transmittance of the spectral sensor. After contamination, the transmittance can decrease by 30%-50%, the particle counter will deviate, and the error rate will reach 20%-40%. The electrochemical sensor will also experience response lag, with the delay time increasing by more than 50%.

[0003] Traditional probes require manual disassembly and cleaning every 7-15 days, with each maintenance session taking 2-4 hours and resulting in production losses due to downtime. For example, the indirect cost of a single production line maintenance session can exceed 5000 yuan. In high-risk environments, such as high-temperature and high-pressure pipelines, manual operation carries extremely high risks. Long-term contaminant adhesion accelerates probe corrosion; for example, the average annual corrosion depth of stainless steel probes is 0.05mm, leading to decreased sensor sensitivity and an average replacement cycle of only 6-12 months, resulting in persistently high hardware costs.

[0004] Therefore, it is necessary to propose an oil monitoring probe with a self-cleaning function to solve the problems of traditional probes being "sensitive to contamination, requiring frequent maintenance, and having a limited lifespan," and to achieve high-precision monitoring that requires no maintenance for a long period of time. Summary of the Invention

[0005] The purpose of this invention is to provide an oil monitoring probe with a self-cleaning function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oil monitoring probe with a self-cleaning function, comprising an oil monitoring probe body, wherein the surface of the oil monitoring probe body is coated with a diamond-like composite hydrophobic coating and a titanium dioxide photocatalytic decomposition coating, an mounting sleeve is fitted at the bottom of the oil monitoring probe body, a piezoelectric ceramic sheet is installed at the outer ring of the bottom end of the mounting sleeve, an ultraviolet lamp strip is fixed at the bottom end of the mounting sleeve, and an optical turbidimeter is provided on one side of the oil monitoring probe body; When the switch of the ultraviolet light strip is triggered, it irradiates the titanium dioxide photocatalytic decomposition coating, which in turn catalytically decomposes the oil molecules on the surface of the oil monitoring probe. When the optical turbidimeter detects that the turbidity on the surface of the oil monitoring probe is greater than the threshold, it triggers the switch of the piezoelectric ceramic plate. The piezoelectric ceramic plate works and generates vibration to peel off the contaminants attached to the surface of the oil monitoring probe.

[0007] Preferably, the diamond-like carbon composite hydrophobic coating is sprayed on the bottom of the oil monitoring probe body, and the titanium dioxide photocatalytic decomposition coating is sprayed on the surface of the diamond-like carbon composite hydrophobic coating. The contact angle of the diamond-like carbon composite hydrophobic coating surface is > °, and the roll-off angle is < °.

[0008] Preferably, the titanium dioxide photocatalytic decomposition coating will decompose the lubricating oil oxides into CO2 and H2O after being irradiated by ultraviolet light strips.

[0009] Preferably, the bottom surface of the mounting sleeve has a side groove, which is an annular groove. The piezoelectric ceramic sheet is sleeved and fixed in the side groove. The positive electrode and the negative electrode of the piezoelectric ceramic sheet both pass through the top of the mounting sleeve, and the wire of the ultraviolet lamp strip passes through the top of the mounting sleeve.

[0010] Preferably, the bottom surface of the mounting sleeve has a slot, which is an annular groove. The inner annular surface of the mounting sleeve has an inner annular groove, and the inner annular surface of the slot has multiple through holes. The through holes connect the inner annular groove and the slot. A plug is inserted into the inside of the through holes. One end of the plug extending into the slot has a bevel, which faces the slot opening. An inlet ring is inserted into the slot. The inlet ring pushes the plug ring into a limiting groove on the surface of the oil monitoring probe body. The limiting groove is an annular groove.

[0011] Preferably, a rubber strip is fixed between the top surface and the bottom surface of the inner ring groove. The rubber strip is in the form of an annular plate, and the other end of the insert is fixed to the outer ring surface of the rubber strip. A portion of the rubber strip is squeezed into the limiting groove by the insert.

[0012] Preferably, the insertion ring is an L-shaped circular plate with multiple notches at one end of the insertion ring extending out of the slot, and a limiting clip is provided between the other end of the insertion ring and the slot.

[0013] Preferably, the limiting device includes an inlet ring, a rubber retaining ring, and a retaining groove. The retaining groove is a circular groove with a rounded end. The retaining groove is opened at the other end of the insert ring. The inlet ring is fixed inside the slot. The rubber retaining ring is sleeved and fixed at one end of the inlet ring. The cross-section of the rubber retaining ring is a circular ring strip with a circular surface. The diameter of the circular surface of the rubber retaining ring is larger than the width of the groove opening.

[0014] Preferably, a rubber cover is fixed to the top of the mounting sleeve, and a rubber ring is fixed to the top of the rubber cover. The rubber ring is expanded and fitted onto the top of the mounting sleeve, and the rubber cover covers the positive and negative electrodes of the piezoelectric ceramic sheet.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The oil monitoring probe with built-in cleaning function proposed in this invention improves cleaning efficiency and extends the probe's service life through a synergistic mechanism of coating and vibration. The coating reduces adhesion, while vibration provides peeling kinetic energy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point C; Figure 5 Figure 2 Enlarged schematic diagram of the structure at point D; Figure 6 This is a schematic diagram of the insert ring structure of the present invention; Figure 7 This is a schematic diagram of the mounting sleeve structure of the present invention.

[0017] In the diagram: 1. Oil monitoring probe body, 101. Limiting groove, 102. Diamond-like composite hydrophobic coating, 103. Titanium dioxide photocatalytic decomposition coating, 2. Mounting sleeve, 201. Side groove, 202. Slot, 203. Perforation, 204. Rubber cover, 205. Rubber collar, 206. Inner ring groove, 3. Rubber strip, 301. Insertion block, 4. Insertion ring, 401. Notch, 402. Inlet ring, 5. Rubber retaining ring, 501. Piezoelectric ceramic sheet, 6. Optical turbidimeter, 7. Ultraviolet lamp strip, 8. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 7This invention provides a technical solution: an oil monitoring probe with a self-cleaning function, comprising an oil monitoring probe body 1. The surface of the oil monitoring probe body 1 is coated with a diamond-like composite hydrophobic coating 102 and a titanium dioxide photocatalytic decomposition coating 103. A mounting sleeve 2 is fitted onto the bottom of the oil monitoring probe body 1. A piezoelectric ceramic sheet 6 is mounted on the outer ring of the bottom end of the mounting sleeve 2. An ultraviolet lamp strip 8 is fixed to the bottom end of the mounting sleeve 2. An optical turbidimeter 7 is provided on one side of the oil monitoring probe body 1. When the switch of the ultraviolet lamp strip 8 is triggered, it irradiates the titanium dioxide photocatalytic decomposition coating 103, causing the titanium dioxide to photocatalyze... The decomposition coating 103 catalyzes and decomposes oil molecules on the surface of the oil monitoring probe body 1. After the optical turbidimeter 7 detects that the turbidity on the surface of the oil monitoring probe body 1 is greater than the threshold, it triggers the switch of the piezoelectric ceramic sheet 6. The piezoelectric ceramic sheet 6 works and generates vibration to peel off the contaminants attached to the surface of the oil monitoring probe body 1. This reduces the amount of contaminants attached to the bottom probe of the oil monitoring probe body 1, ensuring the normal use of the oil monitoring probe body 1 and reducing the frequency of cleaning and maintenance. It should be noted that both the oil monitoring probe body 1 and the optical turbidimeter 7 are installed in the reserved holes on the surface of the hydraulic equipment housing and are fixed by laser welding.

[0020] To reduce the amount of contaminants adhering to the bottom probe of the oil monitoring probe body 1 using a coating structure, the following was proposed: A diamond-like carbon composite hydrophobic coating 102 is sprayed on the bottom of the oil monitoring probe body 1, and a titanium dioxide photocatalytic decomposition coating 103 is sprayed on the surface of the diamond-like carbon composite hydrophobic coating 102. The surface contact angle of the diamond-like carbon composite hydrophobic coating 102 is >150° and the roll-off angle is <5°. After being irradiated by the ultraviolet light strip 8, the titanium dioxide photocatalytic decomposition coating 103 will decompose the lubricating oil oxides into CO2 and H2O. The bottom surface of the mounting sleeve 2 has a side groove 201, which is an annular groove. The piezoelectric ceramic sheet 6 is fixed in the side groove 201. The positive electrode and the negative electrode of the piezoelectric ceramic sheet 6 both pass through the top of the mounting sleeve 2. The wire of the ultraviolet lamp strip 8 passes through the top of the mounting sleeve 2. A rubber cover 204 is fixed to the top of the mounting sleeve 2. A rubber collar 205 is fixed to the top of the rubber cover 204. The rubber collar 205 is expanded and fitted onto the top of the mounting sleeve 2, and the rubber cover 204 covers the positive electrode and the negative electrode of the piezoelectric ceramic sheet 6.

[0021] The diamond-like carbon (DLC) composite hydrophobic coating 102 uses a DLC composite coating with a surface contact angle >150° and a roll-off angle <5°, making it difficult for oil droplets and impurities to adhere and allowing them to detach by gravity or vibration. The titanium dioxide photocatalytic decomposition coating 103 catalytically decomposes oil molecules (e.g., decomposing lubricating oil oxides into CO2 and H2O) under oil flow or ultraviolet light irradiation, with a decomposition efficiency of over 90%. The piezoelectric ceramic sheet 6 generates ultrasonic cavitation effect through high-frequency vibration of 20-100kHz, subjecting the attached contaminants to a shear force of approximately 1000Pa, achieving a peeling vibration duration of 5-10 seconds per cycle. When the optical turbidimeter 7 detects that the contaminant concentration on the probe surface of the oil monitoring probe body 1 is greater than the threshold (e.g., 50 μg / cm³), the coating is applied to the surface of the oil monitoring probe. 2 When the piezoelectric ceramic sheet 6 is vibrating, it will automatically trigger the cleaning process.

[0022] To achieve the goal of fixing the mounting sleeve 2 onto the oil monitoring probe body 1, the following was proposed: The bottom surface of the mounting sleeve 2 has a slot 202, which is an annular groove. The inner annular surface of the mounting sleeve 2 has an inner annular groove 206. The inner annular surface of the slot 202 has multiple through holes 203, which connect the inner annular groove 206 and the slot 202. A plug 301 is inserted into the through hole 203. The end of the plug 301 extending into the slot 202 has a bevel facing the opening of the slot 202. An guide ring 5 is inserted into the slot 202, which pushes the plug ring 4 into place. The limiting groove 101 is formed in the surface of the oil monitoring probe body 1. The limiting groove 101 is an annular groove. A rubber band 3 is fixed between the top surface and the bottom surface of the inner annular groove 206. The rubber band 3 is an annular plate. The other end of the insert block 301 is fixed to the outer annular surface of the rubber band 3. A part of the rubber band 3 is squeezed into the limiting groove 101 by the insert block 301. The insert ring 4 is an annular plate with an "L" shaped cross section. Multiple notches 401 are opened at the end of the insert ring 4 that extends out of the slot 202. The limiting device includes an inlet ring 5, a rubber retaining ring 501, and a retaining groove 402. The retaining groove 402 is a circular groove with a rounded opening. The retaining groove 402 is located at the other end of the insert ring 4. The inlet ring 5 is fixed inside the slot 202. The rubber retaining ring 501 is sleeved and fixed at one end of the inlet ring 5. The cross-section of the rubber retaining ring 501 is a circular ring strip with a circular surface. The diameter of the circular surface of the rubber retaining ring 501 is larger than the width of the groove opening of the retaining groove 402.

[0023] When the insert ring 4 is not inserted into the slot 202, the rubber band 3 is in its initial state and retracted into the inner ring groove 206. At this time, the end of the insert block 301 with the inclined surface extends into the slot 202. The inner thread is pre-set on the outer ring surface of the slot 202, and the outer ring surface of the insert ring 4 is set with the outer thread. The insert ring 4 is screwed into the slot 202 by the finger in the notch 401. During this process, the insert ring 4 pushes the insert block 301 to stretch the rubber band 3 and deform it. One end of the insert block 301 is inserted into the limiting groove 101, thereby fixing the mounting sleeve 2 onto the oil monitoring probe body 1. At this time, the guide ring 5 and the rubber retainer 501 are both inserted into the retainer groove 402, which not only act as elastic gaskets for the insert ring 4 to be screwed into the slot 202, but also form an anti-dislodgement limit between the insert ring 4 and the slot 202.

[0024] How to use the self-cleaning oil monitoring probe: Ensure that the oil monitoring probe body 1 and the optical turbidimeter 7 are installed in the pre-drilled holes on the surface of the hydraulic equipment housing and fixed by laser welding. The mounting sleeve 2 is pre-fixed to the oil monitoring probe body 1. When the insert ring 4 is not inserted into the slot 202, the rubber band 3 is initially retracted into the inner ring groove 206. At this time, one end of the insert block 301 with an inclined surface extends into the slot 202. An internal thread is pre-set on the outer ring surface of the slot 202, and an external thread is set on the outer ring surface of the insert ring 4. Using a finger to grip the notch 401, the insert ring 4 is screwed and pushed into the slot 202. During the pushing process, the insert ring 4 pushes against the insert block 301, causing the rubber band 3 to stretch and deform. Simultaneously, one end of the insert block 301 inserts into the limiting groove 101 on the surface of the oil monitoring probe body 1, thus initially fixing the mounting sleeve 2 to the oil monitoring probe body 1. At this point, both the guide ring 5 and the rubber retaining ring 501 are inserted into the slot 402, which not only act as elastic washers for the screw connection of the insert ring 4 to the slot 202, but also form an anti-disengagement limit between the insert ring 4 and the slot 202, thus completing the installation of the mounting sleeve 2.

[0025] A diamond-like carbon composite hydrophobic coating 102 is sprayed onto the bottom of the oil monitoring probe body 1. This coating has a contact angle >150° and a roll-off angle <5°, making it difficult for oil droplets and impurities to adhere and allowing them to detach by gravity or vibration. A titanium dioxide photocatalytic decomposition coating 103 is sprayed onto the surface of the diamond-like carbon composite hydrophobic coating 102. Under oil flow or ultraviolet light irradiation, the titanium dioxide photocatalytic decomposition coating 103 catalytically decomposes oil molecules (e.g., decomposing lubricating oil oxides into CO2 and H2O), with a decomposition efficiency exceeding 90%. When cleaning is required using the ultraviolet light strip 8, the ultraviolet light strip 8 is triggered, irradiating the titanium dioxide photocatalytic decomposition coating 103 to catalytically decompose oil molecules on the surface of the oil monitoring probe body 1. An optical turbidimeter 7 monitors the turbidity of the oil monitoring probe body 1 surface in real time. When the concentration of contaminants on the probe surface of the oil monitoring probe body 1 is detected to be > a threshold (e.g., 50 μg / cm²), the piezoelectric ceramic sheet 6 is automatically triggered. The piezoelectric ceramic sheet 6 generates high-frequency vibrations of 20-100kHz, producing an ultrasonic cavitation effect that subjectes the attached contaminants to a shear force of approximately 1000Pa, thus achieving peeling. The vibration duration is 5-10 seconds per cycle.

[0026] During normal operation of the hydraulic equipment, the oil monitoring probe body 1 continuously monitors the oil status. Simultaneously, its built-in cleaning function continuously reduces the amount of contaminants adhering to the probe at its bottom, ensuring the normal use of the oil monitoring probe body 1 and reducing the frequency of cleaning and maintenance. Regularly check the working status of each component, such as whether the ultraviolet lamp strip 8, optical turbidimeter 7, and piezoelectric ceramic sheet 6 are functioning properly, and whether the coating is damaged. If any abnormalities are found, repair or replace them promptly.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil monitoring probe with self-cleaning function, comprising an oil monitoring probe body (1), characterized in that: The surface of the oil monitoring probe body (1) is coated with a diamond-like composite hydrophobic coating (102) and a titanium dioxide photocatalytic decomposition coating (103). The bottom of the oil monitoring probe body (1) is fitted with an installation sleeve (2). A piezoelectric ceramic sheet (6) is installed at the outer ring of the bottom end of the installation sleeve (2). An ultraviolet lamp strip (8) is fixed at the bottom end of the installation sleeve (2). An optical turbidimeter (7) is provided on one side of the oil monitoring probe body (1). When the switch of the ultraviolet light strip (8) is triggered, it irradiates the titanium dioxide photocatalytic decomposition coating (103), and the titanium dioxide photocatalytic decomposition coating (103) catalytically decomposes the oil molecules on the surface of the oil monitoring probe body (1). When the optical turbidimeter (7) detects that the turbidity on the surface of the oil monitoring probe body (1) is greater than the threshold, it triggers the switch of the piezoelectric ceramic sheet (6). The piezoelectric ceramic sheet (6) works and generates vibration to peel off the contaminants attached to the surface of the oil monitoring probe body (1).

2. The oil monitoring probe with self-cleaning function according to claim 1, characterized in that: The diamond-like composite hydrophobic coating (102) is sprayed on the bottom of the oil monitoring probe body (1), and the titanium dioxide photocatalytic decomposition coating (103) is sprayed on the surface of the diamond-like composite hydrophobic coating (102). The contact angle of the diamond-like composite hydrophobic coating (102) surface is > (150)° and the roll-off angle is < (5)°.

3. The oil monitoring probe with self-cleaning function according to claim 1, characterized in that: The titanium dioxide photocatalytic decomposition coating (103) will decompose the lubricating oil oxides into CO2 and H2O after being irradiated by the ultraviolet light strip (8).

4. The oil monitoring probe with self-cleaning function according to claim 1, characterized in that: The bottom surface of the mounting sleeve (2) is provided with a side groove (201), which is an annular groove. The piezoelectric ceramic sheet (6) is sleeved and fixed in the side groove (201). The positive electrode and the negative electrode of the piezoelectric ceramic sheet (6) both pass through the top of the mounting sleeve (2). The wire of the ultraviolet lamp strip (8) passes through the top of the mounting sleeve (2).

5. The oil monitoring probe with self-cleaning function according to claim (1), characterized in that: The bottom surface of the mounting sleeve (2) is provided with a slot (202), which is an annular groove. The inner annular surface of the mounting sleeve (2) is provided with an inner annular groove (206). The inner annular surface of the slot (202) is provided with multiple through holes (203). The through holes (203) connect the inner annular groove (206) and the slot (202). A plug (301) is inserted into the inside of the through hole (203). One end of the plug (301) extending into the slot (202) is provided with a slope, which faces the opening of the slot (202). A guide ring (5) is inserted into the slot (202). The guide ring (5) pushes the plug ring (4) into the limiting groove (101) opened on the surface of the oil monitoring probe body (1). The limiting groove (101) is an annular groove.

6. The oil monitoring probe with self-cleaning function according to claim 5, characterized in that: A rubber strip (3) is fixed between the top surface and the bottom surface of the inner ring groove (206). The rubber strip (3) is an annular plate. The other end of the insert (301) is fixed on the outer ring surface of the rubber strip (3). A portion of the rubber strip (3) is squeezed into the limiting groove (101) by the insert (301).

7. The oil monitoring probe with self-cleaning function according to claim 5, characterized in that: The insert ring (4) is an L-shaped circular plate. The end of the insert ring (4) extending out of the slot (202) is provided with multiple notches (401). The other end of the insert ring (4) and the slot (202) are provided with a limiting clip.

8. The oil monitoring probe with self-cleaning function according to claim 7, characterized in that: The limiting device includes an inlet ring (5), a rubber retaining ring (501), and a retaining groove (402). The retaining groove (402) is a circular groove with a rounded opening. The retaining groove (402) is opened at the other end of the insert ring (4). The inlet ring (5) is fixed inside the slot (202). The rubber retaining ring (501) is sleeved and fixed at one end of the inlet ring (5). The cross-section of the rubber retaining ring (501) is a circular ring strip with a circular surface. The diameter of the circular surface of the rubber retaining ring (501) is larger than the width of the groove (402).

9. The oil monitoring probe with self-cleaning function according to claim 4, characterized in that: A rubber cover (204) is fixed to the top of the mounting sleeve (2), and a rubber ring (205) is fixed to the top of the rubber cover (204). The rubber ring (205) is expanded and fitted onto the top of the mounting sleeve (2), and the rubber cover (204) covers the positive and negative electrodes of the piezoelectric ceramic sheet (6).

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