An oil product granularity monitoring device

Abstract

This utility model relates to an oil particle size monitoring device, which sequentially includes an oil inlet pipe, a monitoring module, a circulation pump, and an oil outlet pipe. A gas-liquid separation module is provided between the oil inlet pipe and the monitoring module. The monitoring module includes a detection pool with a detection channel. A color sensor is installed on the detection channel near the oil inlet pipe. A light source assembly and a slit adapted to the light source assembly are provided above the detection channel, and a photoelectric sensor adapted to the light source assembly is provided below the detection channel. This utility model combines thermal and ultrasonic degassing, achieving a bubble removal rate of ≥95%, thus solving the counting error caused by bubble interference. The dual light source is adaptable to different colored oils, improving the detection accuracy of 0.8μm particles and meeting the monitoring needs of tiny aluminum chips in steel and aluminum plate processing.

Description

Technical Field

[0001] This utility model relates to the technical field of oil monitoring in industrial equipment, and in particular to an oil particle size monitoring device. Background Technology

[0002] In the blanking process of steel and aluminum plates, the hydraulic oil in the press return oil line is contaminated with aluminum chips, metal abrasive particles and air bubbles, and the particulate contamination directly affects the equipment life and processing accuracy.

[0003] A search revealed Chinese Patent Publication No. CN117129389A, which discloses an oil particle size monitoring device, including a main pipeline; a pressure boosting assembly, including a pressure boosting pipeline, an oil pump, and a back pressure valve, wherein the inlet and outlet of the pressure boosting pipeline are both connected to the main pipeline, and the outlet of the oil pump is connected to the inlet of the back pressure valve; a degassing assembly, including a delivery pipeline, a buffer tank, and an ultrasonic generator, wherein the buffer tank includes an oil inlet, an oil outlet, and an exhaust port, the inlet of the delivery pipeline is connected to the pressure boosting pipeline, and the inlet of the delivery pipeline is located between the oil pump and the back pressure valve, the outlet of the delivery pipeline is connected to the oil inlet, and a first solenoid valve is installed on the delivery pipeline; and a monitoring assembly, which includes a monitoring pipeline, a particle sensor, a metering pump, and a second solenoid valve, wherein the inlet of the monitoring pipeline is connected to the oil outlet, the outlet of the monitoring pipeline is connected to the pressure boosting pipeline, and the inlet of the particle sensor is connected to the outlet of the second solenoid valve.

[0004] Existing monitoring devices use a single light source: they do not consider changes in oil color (such as dark hydraulic oil containing cutting fluid in steel and aluminum plate blanking lines), and monochromatic light is easily affected by oil absorption. The detection accuracy of 0.8μm particles decreases significantly with the increase of oil color. In view of the above-mentioned shortcomings, the designer has actively researched and innovated in order to create an oil particle size monitoring device that has greater industrial application value. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an oil particle size monitoring device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An oil particle size monitoring device comprises, in sequence, an oil inlet pipe, a monitoring module, a circulation pump, and an oil outlet pipe; A gas-liquid separation module is installed between the oil inlet pipe and the monitoring module; The gas-liquid separation module includes a gas-liquid separation tower. The liquid inlet located at the bottom of the gas-liquid separation tower and close to the oil inlet pipe is connected to the oil inlet pipe. The liquid outlet located at the top of the gas-liquid separation tower and away from the oil inlet pipe is connected to the monitoring module through a first three-way valve. An ultrasonic generator is installed at the bottom of the gas-liquid separation tower and away from the oil inlet pipe. An exhaust valve is installed at the top of the gas-liquid separation tower. The monitoring module includes a detection pool with a detection channel. A color sensor is installed on the side of the detection channel near the oil inlet pipe. A light source assembly and a slit adapted to the light source assembly are installed above the detection channel. A photoelectric sensor adapted to the light source assembly is installed below the detection channel. A second three-way valve is installed between the circulating pump and the oil outlet pipe.

[0007] As a further improvement of this utility model, the first three-way valve is also connected to the cleaning calibration module, which includes a cleaning liquid container and a standard liquid container, and the second three-way valve is also connected to the waste liquid collection tank.

[0008] As a further improvement of this utility model, a cleaning fluid filter is installed at the outlet of the cleaning fluid container, and a stirrer is installed inside the standard fluid container.

[0009] As a further improvement of this utility model, a preheater is installed on the outer wall of the gas-liquid separation tower.

[0010] As a further improvement of this utility model, the preheater is a heating resistance wire or a semiconductor heating plate.

[0011] As a further improvement of this utility model, a level gauge is installed on one side of the top inside the gas-liquid separation tower.

[0012] As a further improvement of this utility model, the light source assembly includes a first laser light source, a second laser light source, and an optical path lens. The optical path lens is disposed above the slit, the first laser light source is disposed on the side of the optical path lens closer to the oil inlet pipe, and the second laser light source is disposed on the side of the optical path lens away from the oil inlet pipe.

[0013] As a further improvement of this utility model, the first laser source is a 650nm red light source, and the second laser source is an 850nm near-infrared light source.

[0014] By means of the above solution, this utility model has at least the following advantages: Bubble elimination: Combining thermal and ultrasonic degassing, the bubble removal rate is ≥95%, solving the counting error caused by bubble interference; Adaptive light source: Dual light sources adapt to different colored oils, improving the detection accuracy of 0.8μm particles and meeting the monitoring needs of tiny aluminum chips in steel and aluminum plate processing; Online maintenance: The integrated cleaning and calibration loop allows for maintenance without disassembly, significantly reducing monitoring downtime. Application adaptability: The compact design (total length <50cm) allows for direct installation on the press return oil pipe, withstands a working pressure of 1.6MPa, and is suitable for harsh metal processing environments.

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an oil particle size monitoring device according to this utility model; Figure 2 yes Figure 1 Schematic diagram of the gas-liquid separation module; Figure 3 yes Figure 1 A schematic diagram of the monitoring module.

[0018] The meanings of the labels in the figures are as follows.

[0019] 1. Oil inlet pipe; 2. Gas-liquid separation module; 3. First three-way valve; 4. Cleaning and calibration module; 5. Monitoring module; 6. Circulation pump; 7. Second three-way valve; 8. Waste liquid collection tank; 9. Oil outlet pipe. Gas-liquid separator 21, liquid inlet 22, ultrasonic generator 23, liquid outlet 24, preheater 25, liquid level gauge 26, exhaust valve 27; Detection cell 51, color sensor 52, detection channel 53, light source assembly 54, slit 55, photoelectric sensor 56. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] The first embodiment of this utility model: like Figures 1-3 As shown, an oil particle size monitoring device in this embodiment mainly includes an oil inlet pipe 1, a gas-liquid separation module 2, a first three-way valve 3, a cleaning and calibration module 4, a monitoring module 5, a circulation pump 6, a second three-way valve 7, a waste liquid collection tank 8, and an oil outlet pipe 9.

[0023] A gas-liquid separation module 2 is provided between the oil inlet pipe 1 and the monitoring module 5. The gas-liquid separation module 2 includes a gas-liquid separation tower 21. The liquid inlet 22 located at the bottom of the gas-liquid separation tower 21 and close to the oil inlet pipe 1 is connected to the oil inlet pipe 1. The liquid outlet 24 located at the top of the gas-liquid separation tower 21 away from the oil inlet pipe 1 is connected to the monitoring module 5 through a first three-way valve 3. An ultrasonic generator 23 is installed at the bottom of the gas-liquid separation tower 21 and away from the oil inlet pipe 1. An exhaust valve 27 is installed at the top of the gas-liquid separation tower 21.

[0024] A preheater 25, which is a heating resistance wire or a semiconductor heating element, is installed on the outer wall of the gas-liquid separation tower 21. A level gauge 26 is installed on one side of the top inside the gas-liquid separation tower 21.

[0025] The monitoring module 5 includes a detection pool 51, a detection channel 53 is provided on the detection pool 51, a color sensor 52 is installed on the side of the detection channel 53 near the oil inlet pipe 1, a light source assembly 54 and a slit 55 adapted to the light source assembly 54 are provided above the detection channel 53, and a photoelectric sensor 56 adapted to the light source assembly 54 is provided below the detection channel 53.

[0026] A second three-way valve 7 is installed between the circulating pump 6 and the oil outlet pipe 9. The first three-way valve 3 is also connected to the cleaning calibration module 4, which includes a cleaning fluid container and a standard fluid container. The second three-way valve 7 is also connected to the waste liquid collection tank 8. A cleaning fluid filter is installed at the outlet of the cleaning fluid container, and a stirrer is installed inside the standard fluid container.

[0027] The light source assembly 54 includes a first laser source, a second laser source, and an optical path lens. The optical path lens is positioned above the slit 55. The first laser source is positioned on the side of the optical path lens closer to the oil inlet pipe 1, and the second laser source is positioned on the side of the optical path lens farther from the oil inlet pipe 1. The first laser source is a 650nm red light source, and the second laser source is an 850nm near-infrared light source.

[0028] The second embodiment of this utility model: like Figures 1-3 As shown, an oil particle size monitoring device in this embodiment mainly includes an oil inlet pipe 1, a gas-liquid separation module 2, a first three-way valve 3, a cleaning and calibration module 4, a monitoring module 5, a circulation pump 6, a second three-way valve 7, a waste liquid collection tank 8, and an oil outlet pipe 9.

[0029] The specific structure is as follows: Main testing pipeline It includes an oil inlet pipe 1 (10mm in diameter), a first three-way valve 3 (model T, pressure resistant 1.6MPa), a detection main pipe (material 304 stainless steel, length 500mm), a circulation pump 6 (flow rate 1-3L / min), a second three-way valve 7, and an oil outlet pipe 9 (10mm in diameter) connected in sequence; the middle section of the detection main pipe is equipped with a transparent detection pool 51 (material quartz glass, volume 5mL, with parallel light-transmitting surfaces on both sides).

[0030] Gas-liquid separation module Connected in series between the oil inlet pipe 1 and the first three-way valve 3, including: The gas-liquid separation tower 21 (with an n-shaped cross-section, 300 mm high, and 80 mm inner diameter) has a liquid inlet 22 at the bottom (connected to the oil inlet pipe 1), a liquid outlet 24 in the middle of the side wall (connected to the first three-way valve 3), and a gas outlet (with an exhaust valve 27, which can be an electromagnetic exhaust valve) at the top.

[0031] Preheater 25 (heating resistance wire or semiconductor heating plate, heating belt wrapped around the outer wall of the separation tower, power 50W, temperature control range 30-50℃, accuracy ±1℃).

[0032] Ultrasonic generator 23 (installed at the bottom center of gas-liquid separation tower 21, frequency 25kHz, power 30W).

[0033] Level gauge 26 (installed on the inner wall of the separation tower, 200mm from the bottom, used to monitor the gas-liquid interface).

[0034] The gas-liquid separation tower is made of 304 stainless steel, with the inner wall polished to Ra≤0.8μm to reduce oil adhesion; the heating belt adopts PID temperature control, which is adjusted in real time through the core board; the vibration surface of the ultrasonic generator is closely attached to the bottom wall of the tower to ensure efficient transmission of ultrasonic energy; the second photoelectric element detects the interface by emitting infrared light (wavelength 940nm), and when the gas content exceeds 30%, it triggers the top electromagnetic exhaust valve (6mm diameter) to open, and the exhaust time continues until the interface is lower than the sensor position.

[0035] Dual-light source detection module Installed on the outside of the main inspection tube, including: Color sensor 52 (model RGB-TSL2591, located 50mm upstream of detection cell 51, sampling frequency 10Hz); Light source assembly 54 (the first laser source is a 650nm red light source (power 5mW), and the second laser source is an 850nm near-infrared light source (power 15mW), both of which are semiconductor lasers); Switchable optical path lens (focal length 20mm, switching controlled by a stepper motor, response time <0.5s); Slit 55 (width 0.1mm, ensuring beam parallelism ≤0.1°); A photoelectric sensor 56 is located on the other side of the detection pool and is arranged coaxially with the light source assembly 54 to receive the light signal transmitted through the oil. A parallel detection beam is formed by connecting the switchable optical path lens to the light source slit (0.1 mm wide).

[0036] The color sensor determines color depth by detecting the R component (range 0-255) in the RGB values ​​of the oil: when R ≥ 200, it is determined to be light-colored oil, and a 650nm light source is activated; when R < 200, it is determined to be dark-colored oil, and the light source is switched to 850nm. A stepper motor (model 28BYJ-48) with a switchable optical path lens is controlled by a PWM signal from the core board. Detection is paused during switching to avoid data distortion. The light source slit uses a precision metal mask to ensure that the beam spot diameter within the detection cell is ≤ 0.5mm.

[0037] Cleaning and calibration module Connected to the main testing pipeline via a branch three-way valve, including: 8. Cleaning solution containers, standard solution containers, three-way valve assembly and waste liquid collection tank; The cleaning solution container contains a specially filtered cleaning agent (filtered through a 0.2μm membrane), which is connected to the first three-way valve at the front end of the detection line via a pipeline. The cleaning solution container (2L capacity, PP material, containing an isopropanol solution filtered through a 0.2μm membrane) has a cleaning solution filter (1μm precision) at the outlet.

[0038] The standard liquid container contains standard oil of known particle size (such as NAS8 grade) and is equipped with a stirrer (300 r / min) to prevent particle sedimentation. The standard liquid container has a volume of 1L, is made of stainless steel, contains NAS8 grade standard oil, and has a stirrer on top (300 r / min, stirring rod length 150 mm).

[0039] Waste liquid collection tank 8 is connected to the second three-way valve 7 at the end of the detection pipeline via a pipeline for recycling cleaning waste liquid. Cleaning pump (flow rate 0.5-2L / min, independently controlled from the main circulation pump).

[0040] Both the cleaning fluid container and the standard fluid container are sealed structures, with the top connected to the atmosphere through an air filter (0.1μm accuracy) to prevent contamination; the stirrer is magnetically coupled to avoid shaft seal leakage, and the stirring cycle is 30 seconds every 5 minutes; both the cleaning pump and the main circulation pump are diaphragm pumps made of corrosion-resistant materials, and the pipeline flushing is achieved by controlling the forward and reverse rotation through the core board.

[0041] A brief description of the working process of this embodiment: Testing process The oil enters the gas-liquid separation tower from the inlet pipe (flow rate 0.5-2m / s). The preheater heats the oil to 40℃ to reduce its viscosity and promote the rise of bubbles. At the same time, the ultrasonic generator is activated to break up tiny bubbles with a diameter of <50μm. The degassed oil enters the main detection pipeline (detection cell 51) from the side wall outlet (flow rate 0.3m / s).

[0042] The color sensor detects the R value of the oil in real time. The core board controls the optical path lens to switch to the corresponding light source according to the value. The beam of light is parallel after passing through the slit and passes through the detection cell. The particles in the oil block the light, which weakens the light intensity received by the first photoelectric element and generates a pulse signal (amplitude 0-5V, pulse width 5-100μs).

[0043] The core board performs analog-to-digital conversion on the pulse signal (sampling rate 1MHz), calculates the particle size based on the amplitude (0.8μm resolution), counts the number based on the frequency, and displays the results in real time on the local terminal and uploads them to the cloud.

[0044] Cleaning and calibration process Cleaning: Automatically starts at 2:00 AM every day. The core board closes the main oil circuit and opens the cleaning branch circuit: the cleaning pump rotates forward to pump the cleaning fluid into the detection pipeline (detection tank 51) at a flow rate of 1L / min. After 2 minutes, it reverses to pump the waste liquid back to the waste liquid collection tank 8. This is repeated 3 times to ensure the pipeline is clean.

[0045] Calibration: After cleaning, turn on the standard solution branch, start the stirrer for 30 seconds to make the standard oil uniform, collect the detection value of the core board and compare it with the standard value (such as NAS8 grade corresponding to ≤200 particles / mL of 2μm particles), calculate the correction coefficient (range 0.9-1.1), and automatically update the algorithm parameters.

[0046] This device integrates gas-liquid separation, dual-light source adaptation, and online maintenance functions, solving problems such as air bubble interference, oil color fluctuation, and detection continuity in the oil return pipeline of the steel and aluminum plate blanking line press. The detection accuracy reaches 0.8μm, and the single detection time is ≤2 minutes, meeting the high reliability requirements of industrial sites.

[0047] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An oil particle size monitoring device, comprising, in sequence, an oil inlet pipe (1), a monitoring module (5), a circulation pump (6) and an oil outlet pipe (9); Its features are: A gas-liquid separation module (2) is provided between the oil inlet pipe (1) and the monitoring module (5); The gas-liquid separation module (2) includes a gas-liquid separation tower (21). The inlet (22) located at the bottom of the gas-liquid separation tower (21) and close to the oil inlet pipe (1) is connected to the oil inlet pipe (1). The outlet (24) located at the top of the gas-liquid separation tower (21) away from the oil inlet pipe (1) is connected to the monitoring module (5) through a first three-way valve (3). An ultrasonic generator (23) is installed at the bottom of the gas-liquid separation tower (21) and away from the oil inlet pipe (1). An exhaust valve (27) is installed at the top of the gas-liquid separation tower (21). The monitoring module (5) includes a detection pool (51), a detection channel (53) is provided on the detection pool (51), a color sensor (52) is installed on the side of the detection channel (53) near the oil inlet pipe (1), a light source assembly (54) and a slit (55) adapted to the light source assembly (54) are provided above the detection channel (53), and a photoelectric sensor (56) adapted to the light source assembly (54) is provided below the detection channel (53). A second three-way valve (7) is installed between the circulating pump (6) and the oil outlet pipe (9).

2. The oil particle size monitoring device as described in claim 1, characterized in that, The first three-way valve (3) is also connected to the cleaning calibration module (4), which includes a cleaning liquid container and a standard liquid container. The second three-way valve (7) is also connected to the waste liquid collection tank (8).

3. The oil particle size monitoring device as described in claim 2, characterized in that, A cleaning fluid filter is installed at the outlet of the cleaning fluid container, and a stirrer is installed inside the standard fluid container.

4. The oil particle size monitoring device as described in claim 1, characterized in that, A preheater (25) is installed on the outer wall of the gas-liquid separator (21).

5. The oil particle size monitoring device as described in claim 4, characterized in that, The preheater (25) is a heating resistance wire or a semiconductor heating element.

6. The oil particle size monitoring device as described in claim 1, characterized in that, A level gauge (26) is installed on the top side inside the gas-liquid separation tower (21).

7. The oil particle size monitoring device as described in claim 1, characterized in that, The light source assembly (54) includes a first laser light source, a second laser light source and an optical path lens. The optical path lens is disposed above the slit (55). The first laser light source is disposed on the side of the optical path lens closer to the oil inlet pipe (1), and the second laser light source is disposed on the side of the optical path lens away from the oil inlet pipe (1).

8. The oil particle size monitoring device as described in claim 7, characterized in that, The first laser source is a 650nm red light source, and the second laser source is an 850nm near-infrared light source.

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