Online oil granularity detection device and detection method

Abstract

The invention relates to an online oil granularity detection device and method, and belongs to the technical field of oil detection. The sampling bottle is connected with a nitrogen inlet pipe, an oil inlet pipe, a detection connecting pipe, a vacuum connecting pipe and an oil discharge pipe; vacuumizing is conducted through the vacuum connecting pipe, nitrogen is input through the nitrogen inlet pipe, and oil is pumped through the detection connecting pipe to enter the online particle counter to be detected; the on-line particle counter transmits detected information to the central control computer, so that real-time remote checking is facilitated. The oil discharge pipe is connected with the oil tank to recover oil in the sampling bottle. An alarm module is further integrated on the central control computer, and when the detection result of the online particle counter is higher than a set value, the central control computer controls the alarm module to give an alarm to remind an operator to intervene and maintain the system. The detection device is simple in structure and easy and convenient to operate, and the problems that oil detection depends on manpower, and detection results are tedious to obtain and check are solved.

Description

Technical Field

[0001] This invention belongs to the field of oil detection technology, and relates to an online oil particle size detection device and detection method. Background Technology

[0002] Hydraulic oil plays a crucial role in hydraulic systems, serving not only as lubricant and coolant but also as a key medium for power transmission. However, in actual use, hydraulic oil inevitably becomes contaminated with various pollutants such as dust, metal particles, and moisture. These contaminants accelerate the oxidation and deterioration of the oil, significantly reducing its performance and leading to a series of equipment malfunctions. For example, metal particles flowing with the hydraulic oil in a hydraulic system can act like sharp blades, scratching the inner wall of the hydraulic pump, resulting in poor sealing performance, increased internal leakage, and a significant reduction in operating efficiency. Moisture, on the other hand, promotes emulsification of the oil, destroying its original lubricating properties, increasing friction between components, and accelerating wear.

[0003] To prevent equipment failures and extend equipment lifespan, regular monitoring of hydraulic fluid cleanliness is crucial. Currently, hydraulic fluid contamination detectors have emerged as a highly efficient monitoring tool. These detectors utilize the light obscuration method (light-blocking method) and offer numerous advantages, including fast detection speed, strong anti-interference capabilities, high accuracy, and good repeatability, providing a scientific basis for hydraulic system maintenance. By regularly monitoring hydraulic fluid cleanliness using this instrument, maintenance personnel can promptly detect abnormalities and take appropriate measures, thereby ensuring the normal operation of the equipment. In fields such as hydraulic systems for construction machinery and the maintenance of marine engines, the application of hydraulic fluid contamination detectors has yielded significant results, greatly improving equipment reliability and operating efficiency while also reducing maintenance costs.

[0004] However, existing methods for detecting oil contamination still face several technical challenges. Currently, they primarily rely on manual, periodic sampling followed by laboratory analysis. This process is cumbersome and time-consuming. From sampling to testing and waiting for the laboratory report, the entire process is lengthy, making real-time monitoring of oil cleanliness difficult. Furthermore, the high labor costs, requiring not only specialized sampling personnel but also laboratory analysts, increase operational costs for businesses.

[0005] Furthermore, existing detection methods have significant shortcomings in data acquisition and early warning. Operators must physically visit the testing instruments to obtain data; they cannot view the data directly and clearly on a computer screen. More importantly, there is no automatic alarm function to alert operators to excessively high particulate contamination levels. If particulate contamination in the oil exceeds safe levels and is not detected and addressed promptly, it can cause serious damage to equipment and even lead to major safety accidents. Therefore, developing an oil contamination detection technology capable of real-time monitoring, remote data transmission, and automatic alarm functions is urgently needed. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an online oil particle size detection device and detection method to solve the problems of oil detection relying on manual labor and the cumbersome process of obtaining and viewing detection results.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An online oil particle size detection device includes a sampling bottle. The top of the sampling bottle is connected to a nitrogen inlet pipe, an oil inlet pipe, a detection connection pipe, and a vacuum connection pipe. The bottom of the sampling bottle is connected to an oil drain pipe. A vacuum pump is installed on the vacuum connection pipe. The inlet end of the nitrogen inlet pipe is connected to a nitrogen source. An online particle counter is installed at the end of the detection connection pipe furthest from the sampling bottle. The online particle counter is electrically connected to a central control computer, transmitting the detected information to the central control computer.

[0008] Optionally, the oil inlet pipe is equipped with an oil inlet reversing valve, and the oil outlet pipe is equipped with an oil outlet reversing valve.

[0009] Optionally, the nitrogen inlet pipe is equipped with an electric ball valve.

[0010] Optionally, the end of the oil drain pipe away from the sampling bottle is also provided with an oil tank to recover the oil in the sampling bottle.

[0011] Optionally, the sampling bottle has an upper cap at the top and a lower cap at the bottom; the nitrogen inlet pipe, oil inlet pipe, detection connection pipe, and vacuum connection pipe are respectively connected to the top of the sampling bottle through the upper cap; the oil outlet pipe is connected to the bottom of the sampling bottle through the lower cap.

[0012] Optionally, it also includes a base, on which the sampling bottle is fixed by the lower end cap; the online particle counter is mounted on the base.

[0013] Optionally, the central control computer integrates an alarm module. When the detection result of the online particle counter is higher than a set value, the central control computer controls the alarm module to issue an alarm.

[0014] Optionally, the alarm module is an audible and visual alarm.

[0015] An online oil particle size detection method, employing any of the above-mentioned online oil particle size detection devices, includes the following steps: The oil to be tested flows into the sampling bottle through the inlet pipe. Once the oil reaches the set height, the vacuum pump is activated to extract the air from the sampling bottle, creating a negative pressure inside. This causes the dissolved air in the oil to be released, thus eliminating air bubbles. After the dissolved gas has been fully released, a nitrogen source supplies nitrogen to the sampling bottle through the nitrogen inlet pipe, forcing the oil through the detection connection pipe into the online particle counter for testing. The online particle counter then uploads the test results to the central control computer. After the test is completed, the oil in the sampling bottle enters the oil tank through the drain pipe; The central control computer has an integrated alarm module. When the inspection result is higher than the set value, the central control computer controls the alarm module to issue an alarm, reminding the operator to intervene and maintain the system.

[0016] Optionally, the oil inlet pipe is equipped with an oil inlet reversing valve, the oil outlet pipe is equipped with an oil outlet reversing valve, and the nitrogen inlet pipe is equipped with an electric ball valve; Open the inlet reversing valve, and the oil to be tested flows into the sampling bottle through the inlet pipe. After the oil reaches the set height, close the inlet reversing valve; open the outlet reversing valve, and the oil to be tested enters the oil tank through the outlet pipe. Open the electric ball valve to allow nitrogen gas to enter the sampling bottle through the nitrogen inlet pipe.

[0017] The beneficial effects of this invention are as follows: The online oil particle size detection device of the present invention can realize online monitoring of oil detection status, remote monitoring of detection results, and automatic alarm function for excessively high contamination levels, thereby significantly reducing the cost of oil quality control.

[0018] This invention electrically connects an online particle counter to a central control computer. The online particle counter uploads the detected results to the central control computer, allowing staff to view them remotely in real time, eliminating the cumbersome process of on-site inspection. The central control computer also integrates an alarm module, which promptly alerts staff to intervene and maintain the system after exceeding limits, improving work efficiency and ensuring the normal operation of processes.

[0019] This invention also incorporates a vacuum pump in the sampling bottle, creating negative pressure inside by drawing a vacuum. This facilitates the negative pressure precipitation of dissolved gases in the oil and eliminates air bubbles, ensuring that the test results are not affected by air bubbles. After eliminating air bubbles, nitrogen gas is introduced, and the oil to be tested is then forced into an online particle counter for detection. The overall device has a simple structure and is easy to operate.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a simplified flowchart of the workflow of the present invention; Figure 3 This is a schematic diagram of the detection device of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the detection device of the present invention. Figure 2 .

[0022] Figure label: 1. Oil inlet reversing valve, 2. Sampling bottle, 3. Electric ball valve, 4. Nitrogen source, 5. Vacuum pump, 6. Online particle counter, 7. Oil outlet reversing valve, 8. Oil tank, 21. Base, 22. Nitrogen inlet pipe, 23. Oil inlet pipe, 24. Detection connection pipe, 25. Oil outlet pipe, 26. Upper end cap, 27. Lower end cap, 28. Vacuum connection pipe, 29. Oil return pipe. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Please see Figures 1-4 This is an online oil particle size detection device, comprising a sampling bottle 2, with a nitrogen inlet pipe 22, an oil inlet pipe 23, a detection connection pipe 24, and a vacuum connection pipe 28 connected to the top of the sampling bottle 2, and an oil drain pipe 25 connected to the bottom of the sampling bottle 2; a vacuum pump 5 is installed on the vacuum connection pipe 28, and the inlet end of the nitrogen inlet pipe 22 is connected to a nitrogen source 4, which provides a stable nitrogen pressure for driving the oil and purging the system; an online particle counter 6 is installed at the end of the detection connection pipe 24 away from the sampling bottle 2 for detecting the particle size in the oil; the online particle counter 6 is electrically connected to a central control computer to transmit the detected information to the central control computer; an oil tank 8 is also installed at the end of the oil drain pipe 25 away from the sampling bottle 2 to recover the oil in the sampling bottle 2; an oil return pipe 29 is also installed on the oil tank 8, and the end of the oil return pipe 29 away from the oil tank 8 is connected to the oil inlet pipe 23.

[0027] In some embodiments of the present invention, the sampling bottle 2 is provided with a fully transparent window to facilitate observation of the oil state.

[0028] Furthermore, an inlet reversing valve 1 is installed on the oil inlet pipe 23, and an outlet reversing valve 7 is installed on the oil outlet pipe 25; an electric ball valve 3 is installed on the nitrogen inlet pipe 22, which is used for on / off control. After the inlet reversing valve 1 is opened, oil enters the oil inlet pipe 23; after the outlet reversing valve 7 is opened, oil exits the oil outlet pipe 25; and after the electric ball valve 3 is opened, nitrogen begins to be introduced into the sampling bottle 2 through the nitrogen inlet pipe 22.

[0029] In some embodiments of the present invention, the inlet directional valve 1 and the outlet directional valve 7 are both cartridge-type directional valves used for on / off control.

[0030] Furthermore, the detection device of the present invention also includes a base 21, which is used to support all components of the system; the sampling bottle 2 is provided with an upper end cap 26 at the top and a lower end cap 27 at the bottom, and the sampling bottle 2 is fixed to the base 21 by the lower end cap 27, and the online particle counter 6 is also fixedly mounted on the base 21. The nitrogen inlet pipe 22, the oil inlet pipe 23, the detection connection pipe 24, and the vacuum connection pipe 28 are respectively connected to the top of the sampling bottle 2 by the upper end cap 26; the oil outlet pipe 25 is connected to the bottom of the sampling bottle 2 by the lower end cap 27.

[0031] Furthermore, the central control computer integrates an alarm module. When the detection result of the online particle counter 6 is higher than the set value, the central control computer controls the alarm module to issue an alarm.

[0032] In some embodiments of the present invention, the alarm module is an audible and visual alarm or a network communication device electrically connected to the staff's equipment. When it is a network communication device, it sends alarm information or alarm notifications to the staff's equipment via the network, reminding the staff to intervene and perform maintenance in a timely manner.

[0033] An online oil particle size detection method, using the above-mentioned online oil particle size detection device, includes the following steps: Open the inlet reversing valve 1, and the oil to be tested flows into the sampling bottle 2 through the inlet pipe 23. After the oil reaches the set height, close the inlet reversing valve 1. At this time, the oil contains a lot of air bubbles. Start the vacuum pump 5 to extract the air from the sampling bottle 2, reducing the gas pressure inside the sampling bottle 2 and creating a negative pressure inside the sampling bottle 2. Achieve the required vacuum level, causing the air dissolved in the oil to precipitate out, thereby eliminating air bubbles and ensuring that the test results are not interfered with by air bubbles. After the dissolved gas has been fully released, open the electric ball valve 3, and the nitrogen source 4 delivers nitrogen to the sampling bottle 2 through the nitrogen inlet pipe 22. The oil is then forced into the online particle counter 6 for testing through the detection connection pipe 24. The online particle counter 6 uploads the test results to the central control computer.

[0034] After the test is completed, the oil drain reversing valve 7 is opened, and the tested oil enters the oil tank 8 through the oil drain pipe 25 for storage. When it is necessary to repeat the test, the oil is transported back to the sampling bottle 2 through the oil return pipe 29 on the oil tank 8 for retesting.

[0035] The central control computer has an integrated alarm module. After receiving the detection results uploaded by the online particle counter 6, the central control computer compares them with the set value. When the detection result is higher than the set value, the central control computer controls the alarm module to issue an alarm, reminding the operator to intervene and maintain the system.

[0036] The online oil particle size detection device of the present invention can realize online monitoring of oil detection status, remote monitoring of detection results, and automatic alarm function for excessively high contamination levels, thereby significantly reducing the cost of oil quality control.

[0037] This invention electrically connects an online particle counter to a central control computer. The online particle counter uploads the detected results to the central control computer, allowing staff to view them remotely in real time, eliminating the cumbersome process of on-site inspection. The central control computer also integrates an alarm module, which promptly alerts staff to intervene and maintain the system after exceeding limits, improving work efficiency and ensuring the normal operation of processes.

[0038] This invention also incorporates a vacuum pump 5 in the sampling bottle 2. By creating a vacuum, a negative pressure is formed inside the sampling bottle 2, facilitating the negative pressure precipitation of dissolved gases in the oil and eliminating air bubbles, thus ensuring that the test results are not interfered with by air bubbles. After eliminating air bubbles, nitrogen gas is introduced, and the oil to be tested is then pumped into an online particle counter for detection. The overall device has a simple structure and is easy to operate.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An online oil particle size detection device, characterized in that: The system includes a sampling bottle (2), the top of which is connected to a nitrogen inlet pipe (22), an oil inlet pipe (23), a detection connection pipe (24), and a vacuum connection pipe (28), and the bottom of which is connected to an oil drain pipe (25); a vacuum pump (5) is provided on the vacuum connection pipe (28), the inlet end of the nitrogen inlet pipe (22) is connected to a nitrogen source (4), and an online particle counter (6) is provided at the end of the detection connection pipe (24) away from the sampling bottle (2); the online particle counter (6) is electrically connected to a central control computer and transmits the detected information to the central control computer.

2. The online oil particle size detection device according to claim 1, characterized in that: The oil inlet pipe (23) is equipped with an oil inlet reversing valve (1), and the oil outlet pipe (25) is equipped with an oil outlet reversing valve (7).

3. The online oil particle size detection device according to claim 1, characterized in that: An electric ball valve (3) is provided on the nitrogen inlet pipe (22).

4. The online oil particle size detection device according to claim 1, characterized in that: An oil tank (8) is provided at the end of the oil drain pipe (25) away from the sampling bottle (2) to recover the oil in the sampling bottle (2).

5. The online oil particle size detection device according to claim 1, characterized in that: The sampling bottle (2) is provided with an upper end cap (26) at the top and a lower end cap (27) at the bottom; the nitrogen inlet pipe (22), oil inlet pipe (23), detection connection pipe (24), and vacuum connection pipe (28) are respectively connected to the top of the sampling bottle (2) through the upper end cap (26); the oil outlet pipe (25) is connected to the bottom of the sampling bottle (2) through the lower end cap (27).

6. The online oil particle size detection device according to claim 5, characterized in that: It also includes a base (21), the sampling bottle (2) is fixed on the base (21) by the lower end cap (27); the online particle counter (6) is located on the base (21).

7. The online oil particle size detection device according to claim 1, characterized in that: The central control computer is equipped with an alarm module. When the detection result of the online particle counter (6) is higher than the set value, the central control computer controls the alarm module to issue an alarm.

8. The online oil particle size detection device according to claim 7, characterized in that: The alarm module is an audible and visual alarm.

9. An online method for detecting oil particle size, characterized in that: The online oil particle size detection device according to any one of claims 1 to 8 includes the following steps: The oil to be tested flows into the sampling bottle (2) through the oil inlet pipe (23). After the oil reaches the set height, the vacuum pump (5) is started to extract the air in the sampling bottle (2), so that a negative pressure is formed inside the sampling bottle (2), which causes the air dissolved in the oil to precipitate out, thereby eliminating bubbles. After the dissolved gas is fully released, the nitrogen source (4) delivers nitrogen to the sampling bottle (2) through the nitrogen inlet pipe (22), and presses the oil into the online particle counter (6) through the detection connection pipe (24) for detection. The online particle counter (6) uploads the detection results to the central control computer. After the test is completed, the oil in the sampling bottle (2) enters the oil tank (8) through the drain pipe (25); The central control computer has an integrated alarm module. When the inspection result is higher than the set value, the central control computer controls the alarm module to issue an alarm, reminding the operator to intervene and maintain the system.

10. The online oil particle size detection method according to claim 9, characterized in that: An oil inlet reversing valve (1) is provided on the oil inlet pipe (23), and an oil outlet reversing valve (7) is provided on the oil outlet pipe (25); an electric ball valve (3) is provided on the nitrogen inlet pipe (22). Open the oil inlet reversing valve (1), and the oil to be tested flows into the sampling bottle (2) through the oil inlet pipe (23). After the oil reaches the set height, close the oil inlet reversing valve (1); open the oil outlet reversing valve (7), and the oil to be tested enters the oil tank (8) through the oil outlet pipe (25). Open the electric ball valve (3) to allow nitrogen gas to enter the sampling bottle (2) through the nitrogen gas inlet pipe (22).

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