A laser particle sensor for in-line monitoring in a pipeline

Abstract

The utility model discloses a kind of laser particle sensors for in-pipe online monitoring, it is related to laser particle sensor field, including laser particle sensor structure, laser particle sensor structure includes oil liquid inlet pipe and oil liquid outlet pipe, oil liquid inlet pipe and oil liquid outlet pipe are all installed with one Y-shaped connecting pipeline, Y-shaped connecting pipeline is composed of main pipeline, first branch pipeline, second branch pipeline and closed valve, first branch pipeline, second branch pipeline are fixedly installed on main pipeline, by being respectively provided with one Y-shaped connecting pipeline composed of main pipeline, first branch pipeline, second branch pipeline and closed valve on the oil liquid inlet pipe and oil liquid outlet pipe of laser particle sensor structure, and flush assembly is fixedly installed on the second branch pipeline on one of Y-shaped connecting pipeline, regular cleaning inside sensor main body can be realized, effectively remove the particle impurities and oil dirt mixture attached to the inner wall of detection channel in sensor main body.

Description

Technical Field

[0001] This utility model relates to the field of laser particle sensors, and in particular to a laser particle sensor for online monitoring inside pipelines. Background Technology

[0002] During the operation of a hydraulic system, the cleanliness of the hydraulic fluid directly affects the system's operational stability, reliability, and service life. Internal components of the hydraulic system experience wear during relative movement, and impurities from the external environment can also infiltrate the fluid, resulting in the presence of various tiny particles. These particles can exacerbate wear, jamming, and even failure of critical components such as hydraulic pumps, valves, and actuators, leading to system malfunctions and significant economic losses. Therefore, real-time and accurate monitoring of particulate contaminants in the hydraulic fluid is crucial. Laser particle sensors, used for online monitoring within pipelines, are widely installed on the return oil lines of hydraulic systems. They can capture key parameters such as the number and size of tiny particles in the fluid in real time, providing operators with data support on fluid cleanliness to enable timely maintenance measures and ensure the normal operation of the hydraulic system.

[0003] However, existing laser particle sensors used in hydraulic system return lines typically have relatively narrow detection channels designed to meet high-precision detection requirements. During long-term, continuous monitoring, tiny particles in the oil, as well as oil contaminants from oxidation and decomposition, easily adhere to the inner wall of the detection channel. Over time, these deposits accumulate, not only reducing the effective flow cross-section of the detection channel and hindering normal oil flow, leading to data inaccuracies and reduced monitoring accuracy, but also potentially interfering with the sensor's laser emission and reception components, even causing sensor malfunctions. This prevents effective monitoring of oil particles, ultimately affecting the accurate assessment of the hydraulic system's operating status and failing to meet the monitoring requirements for long-term stable operation of hydraulic systems. Utility Model Content

[0004] The main objective of this invention is to provide a laser particle sensor for online monitoring inside pipelines, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A laser particle sensor for online monitoring within a pipeline includes a laser particle sensor structure comprising an oil inlet pipe and an oil outlet pipe. A Y-shaped connecting pipe is installed on both the oil inlet pipe and the oil outlet pipe. The Y-shaped connecting pipe consists of a main pipe, a first branch pipe, a second branch pipe, and a closing valve. The first and second branch pipes are fixedly installed on the main pipe. There are two closing valves, each fixedly installed on the first and second branch pipes respectively. A flushing assembly is fixedly installed on one of the second branch pipes of the Y-shaped connecting pipe.

[0006] Preferably, the laser particle sensor structure further includes a sensor body, and the oil inlet pipe and oil outlet pipe are both fixedly installed on the sensor body.

[0007] Preferably, the two main pipes on the two Y-shaped connecting pipes are respectively fixedly installed on the oil inlet pipe and the oil outlet pipe.

[0008] Preferably, the rinsing assembly consists of a delivery pipe and a miniature water pump. The delivery pipe is fixedly installed on the liquid outlet pipe of the miniature water pump. The delivery pipe is also fixedly installed on a second branch pipe on one of the Y-shaped connecting pipes. The second branch pipe on the other Y-shaped connecting pipe is connected to the cleaning liquid recovery container through a pipe.

[0009] Preferably, the inlet pipe on the micro water pump is connected to the cleaning fluid storage container via a pipe.

[0010] Preferably, both first branch pipes on the two Y-shaped connecting pipes are connected to oil pipes.

[0011] Compared with the prior art, the present invention has the following beneficial effects: By installing a Y-shaped connecting pipe consisting of a main pipe, a first branch pipe, a second branch pipe, and a closed valve on the oil inlet pipe and oil outlet pipe of the laser particle sensor structure, and by fixing a flushing assembly on the second branch pipe of one of the Y-shaped connecting pipes, after long-term use of the laser particle sensor structure, the micro water pump in the flushing assembly can be activated by closing the closed valve installed on the first branch pipe of the two Y-shaped connecting pipes and opening the closed valve installed on the second branch pipe. This allows the cleaning fluid in the cleaning fluid storage container to be drawn in through the inlet pipe and transported through the outlet pipe and delivery pipe to the corresponding second branch pipe, and then flow into the sensor. Inside the sensor body, the internal structure, including the detection channel, is flushed. The flushing fluid, carrying the attached particulate impurities and oil mixture, flows into the cleaning fluid recovery container through the second branch pipe of another Y-shaped connecting pipe. This achieves regular cleaning of the inside of the sensor body, effectively removing particulate impurities and oil mixtures attached to the inner wall of the detection channel. This prevents the accumulation of impurities and oil mixtures from reducing the effective flow cross-section of the detection channel or interfering with the laser emitting and receiving components, ensuring normal oil flow, ensuring the accuracy and precision of the detection data, reducing sensor failures, and extending the sensor's service life. This meets the monitoring requirements for the long-term stable operation of the hydraulic system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the laser particle sensor structure of this utility model after disassembly of the Y-shaped connecting pipe; Figure 3 This is an exploded view of the rinsing assembly of this utility model.

[0013] In the diagram: 1. Laser particle sensor structure; 2. Y-shaped connecting pipe; 3. Flushing assembly; 4. Sensor body; 5. Oil inlet pipe; 6. Main pipe; 7. First branch pipe; 8. Second branch pipe; 9. Closing valve; 10. Miniature water pump; 11. Liquid outlet pipe; 12. Liquid inlet pipe; 13. Delivery pipe; 14. Oil outlet pipe. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] Please see Figure 1 , Figure 2 , Figure 3As shown, a laser particle sensor for online monitoring within a pipeline includes a laser particle sensor structure 1. The structure 1 comprises an oil inlet pipe 5 and an oil outlet pipe 14. A Y-shaped connecting pipe 2 is installed on both the oil inlet pipe 5 and the oil outlet pipe 14. The Y-shaped connecting pipe 2 consists of a main pipe 6, a first branch pipe 7, a second branch pipe 8, and a shut-off valve 9. The first branch pipe 7 and the second branch pipe 8 are fixedly installed on the main pipe 6. There are two shut-off valves 9, fixedly installed on the first branch pipe 7 and the second branch pipe 8 respectively. A flushing assembly 3 is fixedly installed on the second branch pipe 8 of one of the Y-shaped connecting pipes 2. By setting a Y-shaped connecting pipe 2 (comprising the main pipe 6, the first branch pipe 7, the second branch pipe 8, and the shut-off valve 9) on the oil inlet pipe 5 and the oil outlet pipe 14 of the laser particle sensor structure 1, and by fixing the flushing assembly 3 on the second branch pipe 8 of one of the Y-shaped connecting pipes 2, the laser particle sensor structure 1 can be cleaned by closing the valve after long-term use. The closed valve 9 installed on the first branch pipe 7 of the two Y-shaped connecting pipes 2 is opened, and the closed valve 9 installed on the second branch pipe 8 is opened. The micro water pump 10 in the flushing assembly 3 is started, and the cleaning fluid in the cleaning fluid storage container is sucked in through the inlet pipe 12 and transported through the outlet pipe 11 and the delivery pipe 13 to the corresponding second branch pipe 8, and then flows into the sensor body 4. The internal structure of the sensor body 4, such as the detection channel, is flushed. The flushed cleaning fluid, carrying the attached particulate impurities and oil mixture, flows into the cleaning fluid recovery container through the second branch pipe 8 of the other Y-shaped connecting pipe 2. This realizes the periodic cleaning of the inside of the sensor body 4, effectively removing the particulate impurities and oil mixture attached to the inner wall of the detection channel inside the sensor body 4, avoiding their accumulation and reducing the effective flow cross section of the detection channel or interfering with the laser emission and reception components, ensuring the normal flow of oil, ensuring the accuracy and monitoring precision of the detection data, reducing the occurrence of sensor failures, extending the service life of the sensor, and thus meeting the monitoring requirements for the long-term stable operation of the hydraulic system.

[0016] Specifically, the laser particle sensor structure 1 also includes a sensor body 4, an oil inlet pipe 5 and an oil outlet pipe 14, both fixedly mounted on the sensor body 4. Two main pipes 6 on the two Y-shaped connecting pipes 2 are respectively fixedly mounted on the oil inlet pipe 5 and the oil outlet pipe 14. The flushing assembly 3 consists of a delivery pipe 13 and a miniature water pump 10. The delivery pipe 13 is fixedly mounted on the outlet pipe 11 of the miniature water pump 10. The delivery pipe 13 is also fixedly mounted on the second branch pipe 8 of one of the Y-shaped connecting pipes 2. The second branch pipe 8 on the other Y-shaped connecting pipe 2 is connected to a cleaning fluid recovery container via a pipe. The inlet pipe 12 of the miniature water pump 10 is connected to a cleaning fluid storage container via a pipe. Two first branch pipes 7 on the two Y-shaped connecting pipes 2 are both connected to oil pipes. When using this laser particle sensor for online monitoring within the pipeline, first connect the two Y-shaped... The first branch pipe 7 on the connecting pipe 2 is connected to the hydraulic system return oil line. The inlet pipe 12 on the micro water pump 10 is connected to the cleaning fluid storage container through a pipe. The second branch pipe 8 on the other Y-shaped connecting pipe 2 is connected to the cleaning fluid recovery container through a pipe. At this time, the closing valve 9 on the first branch pipe 7 of the two Y-shaped connecting pipes 2 is opened and the closing valve 9 on the second branch pipe 8 is closed. The oil in the hydraulic system return oil line will flow into the main pipe 6 through the first branch pipe 7, and then enter the sensor body 4 through the oil inlet pipe 5. During the flow of the oil in the detection channel of the sensor body 4, the sensor body 4 will capture key parameters such as the number and size of tiny particles in the oil in real time. After the detection is completed, the oil flows out through the oil outlet pipe 14, and then flows back to the hydraulic system return oil line through the corresponding main pipe 6 and the first branch pipe 7, realizing online monitoring of oil particulate contaminants.

[0017] When the sensor body 4 needs cleaning of the detection channel after a period of use, first close the shut-off valve 9 on the first branch pipe 7 of the two Y-shaped connecting pipes 2 to prevent oil from the hydraulic system return line from continuing to flow into the sensor body 4. Then open the shut-off valve 9 on the second branch pipe 8 of the two Y-shaped connecting pipes 2 and start the miniature water pump 10 in the flushing assembly 3. The miniature water pump 10 draws the cleaning fluid from the cleaning fluid storage container through the inlet pipe 12, and then delivers it to the delivery pipe 13 through the outlet pipe 11. The cleaning fluid flows into the corresponding second branch pipe 8 through the delivery pipe 13, and then enters the... The main pipe 6 flows into the detection channel of the sensor body 4 through the oil outlet pipe 14, flushing the particulate impurities and oil mixture attached to the inner wall of the detection channel. The flushed cleaning fluid carries these impurities out through the oil inlet pipe 5, and then flows into the cleaning fluid recovery container through the corresponding main pipe 6 and the second branch pipe 8. After continuous flushing for a period of time, the micro water pump 10 is turned off. After the cleaning fluid has completely flowed into the cleaning fluid recovery container, the sealing valve 9 on the second branch pipe 8 of the two Y-shaped connecting pipes 2 is closed, and the sealing valve 9 on the first branch pipe 7 is reopened. The sensor then resumes normal online monitoring.

[0018] It should be noted that the working principle of the sensor body 4 is based on mature optical detection principles such as laser scattering and laser diffraction. When the oil flows through the detection channel inside the sensor body 4, the laser beam emitted by the laser emitting component passes through the oil. The tiny particles in the oil will scatter or diffract the laser beam. After the laser receiving component captures these optical signals, the internal processor analyzes and calculates them to accurately obtain key parameters such as the number and size of the particles, providing reliable data support for monitoring the cleanliness of the hydraulic system oil. When cleaning the detection channel inside the sensor body 4, the cleaning fluid itself has the characteristics of dissolving, stripping oil stains, and carrying impurities. The small amount of residual oil in the detection channel will not react adversely with the cleaning fluid, nor will it affect the cleaning fluid's ability to remove particulate impurities and oil mixtures from the channel wall. After cleaning, to avoid the residual cleaning fluid mixing with the subsequent oil flow and affecting the performance of the oil and the accuracy of the monitoring data, the micro water pump 10 should be continuously turned on for a period of time to flush the water, then turned off. Wait a few minutes to allow the residual cleaning fluid to flow fully into the cleaning fluid recovery container. If necessary, the closed valve 9 on the first branch pipe 7 can be briefly opened to use the weak pressure of the hydraulic system's return oil to push the residual cleaning fluid out. After ensuring that there is no cleaning fluid residue in the detection channel, the normal monitoring operation of the sensor can be resumed.

[0019] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A laser particle sensor for online monitoring in pipelines, comprising a laser particle sensor structure (1), said laser particle sensor structure (1) including an oil inlet pipe (5) and an oil outlet pipe (14), characterized in that: A Y-shaped connecting pipe (2) is installed on both the oil inlet pipe (5) and the oil outlet pipe (14). The Y-shaped connecting pipe (2) consists of a main pipe (6), a first branch pipe (7), a second branch pipe (8), and a shut-off valve (9). The first branch pipe (7) and the second branch pipe (8) are fixedly installed on the main pipe (6). There are two shut-off valves (9), which are fixedly installed on the first branch pipe (7) and the second branch pipe (8) respectively. A flushing assembly (3) is fixedly installed on the second branch pipe (8) of the Y-shaped connecting pipe (2).

2. A laser particle sensor for online monitoring inside pipelines according to claim 1, characterized in that: The laser particle sensor structure (1) also includes a sensor body (4), and the oil inlet pipe (5) and the oil outlet pipe (14) are both fixedly installed on the sensor body (4).

3. A laser particle sensor for online monitoring inside pipelines according to claim 2, characterized in that: The two main pipes (6) on the two Y-shaped connecting pipes (2) are respectively fixedly installed on the oil inlet pipe (5) and the oil outlet pipe (14).

4. A laser particle sensor for online monitoring inside pipelines according to claim 3, characterized in that: The flushing assembly (3) consists of a delivery pipe (13) and a micro water pump (10). The delivery pipe (13) is fixedly installed on the outlet pipe (11) of the micro water pump (10). The delivery pipe (13) is also fixedly installed on the second branch pipe (8) of one of the Y-shaped connecting pipes (2). The second branch pipe (8) of the other Y-shaped connecting pipe (2) is connected to the cleaning liquid recovery container through a pipe.

5. A laser particle sensor for online monitoring inside a pipeline according to claim 4, characterized in that: The inlet pipe (12) on the micro water pump (10) is connected to the cleaning fluid storage container via a pipe.

6. A laser particle sensor for online monitoring inside pipelines according to claim 5, characterized in that: Both first branch pipes (7) on the two Y-shaped connecting pipes (2) are connected to the oil pipes.

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