Calibration device for liquid particulate matter detection device

Abstract

The utility model belongs to the field of instrument calibration, and discloses a calibration device for a liquid particulate matter detection device, which is a standardized calibration device capable of meeting the requirement of on-site rapid calibration of an aviation engine oil particulate matter concentration analyzer to be detected, and comprises a pure water supply container, a uniform mixing container, a calibration pipeline and a suction filtration assembly which are communicated in sequence, a detachable particle containing box is arranged in the uniform mixing container, the pure water supply container is communicated with the uniform mixing container through the particle containing box, the calibration pipeline is used for allowing particulate matter-containing liquid flowing from the uniform mixing container to the suction filtration assembly to pass through, and the suction filtration assembly is used for collecting the particulate matter-containing liquid from the calibration pipeline. A flow velocity detector and a to-be-detected liquid particulate matter detection device are arranged near the calibration pipeline, and the to-be-detected liquid particulate matter detection device is closer to the suction filtration assembly than the flow velocity detector.

Description

Technical Field

[0001] This utility model belongs to the field of instrument calibration, specifically relating to a calibration device for liquid particulate matter detection devices. Background Technology

[0002] The detection of particulate matter concentration in aviation engine oil directly affects flight safety, engine life, and operational economy. Particulate matter concentration detection in aviation engine oil is a core component of Condition-Based Manufacturing (CBM), and its necessity has been repeatedly validated by numerous aviation accident lessons and industry practices, making it an irreplaceable preventative measure in aviation maintenance. Particulate matter concentration analyzers (such as aviation engine oil particle counters and hydraulic oil contamination detectors) are widely used in aviation, shipbuilding, power, and machinery industries to monitor particulate contaminants in lubricating oils or hydraulic oils to assess equipment wear conditions and oil cleanliness.

[0003] Calibration of aviation oil particulate matter concentration analyzers is a crucial step in ensuring the accuracy and reliability of test data. The lack of a dedicated calibration device for aviation oil particulate matter concentration analyzers can lead to inaccurate test results, affecting engine condition assessment, maintenance decisions, and even flight safety. Due to increasingly stringent requirements for oil particulate contamination detection in aviation, military, and other fields (such as ISO 4406, NAS1638, and GJB 420B), existing calibration methods for aviation oil particulate matter concentration analyzers are insufficient to meet high-precision demands. Therefore, although airworthiness regulations (such as FAA AC 20-97) require regular calibration of aviation oil particulate matter concentration analyzers, a standardized calibration device suitable for the rapid on-site calibration needs of the analyzers being tested lacks a suitable standard. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a calibration device for liquid particulate matter detection devices, which is a standardized calibration device suitable for the on-site rapid calibration needs of aviation oil particulate matter concentration analyzers.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A calibration device for a liquid particulate matter detection device is used to calibrate a liquid particulate matter detection device to be tested. It is characterized by comprising: a pure water supply container, a mixing container, a calibration pipeline, and a filtration assembly connected in sequence. The mixing container contains a detachable particle container. The pure water supply container is connected to the mixing container via the particle container. The calibration pipeline is used to pass particulate-containing liquid flowing from the mixing container to the filtration assembly. The filtration assembly is used to collect particulate-containing liquid from the calibration pipeline. A flow rate detector and the liquid particulate matter detection device to be tested are arranged near the calibration pipeline, with the liquid particulate matter detection device closer to the filtration assembly than the flow rate detector.

[0007] Preferably, the opening on the inner surface of the mixing container that communicates with the pure water supply container is used as the inlet, and the orientation of the inlet inside the mixing container is used as the introduction direction. The particle container has a support plate portion and an edge baffle portion that are integrally continuous inside the mixing container. The support plate portion is horizontal and located below the inlet near it, and the edge baffle portion is located at the edge of the support plate portion, and the introduction direction is parallel to the edge baffle portion.

[0008] Furthermore, the mixing container has a pull-out through hole with a step along its own extension direction, and the opening on the outer surface of the mixing container is relatively large. The particle container also has a pull-out plate that is perpendicularly connected to the support plate. The pull-out plate is fitted into the opening of the pull-out through hole on the outer surface of the mixing container. The inner surface of the mixing container is also provided with a sliding support plate that extends horizontally toward the interior of the mixing container and is located at the lower edge of the pull-out through hole. The upper surface of the sliding support plate and the lower surface of the support plate are respectively formed with mutually movable guide rails and guide grooves.

[0009] Preferably, the mixing container is connected to the calibration pipeline through the outlet, and the particle container is positioned at a high potential energy outlet.

[0010] Furthermore, the outlet is connected to the calibration pipeline via a second booster pump.

[0011] Preferably, the pure water supply container is connected to the particle container output via a first booster pump.

[0012] Preferably, the bottom of the mixing container is also provided with a stirrer and an ultrasonic vibrator. The ultrasonic vibrator is used to disperse the particle clusters formed by multiple particles, and the stirrer is used to mix the particles evenly in the liquid containing the particles.

[0013] Preferably, the calibration pipeline has a first outlet and a second outlet. The calibration pipeline is connected to either the first outlet or the second outlet via a two-position three-way valve, and the liquid containing particulate matter flows to the filtration assembly through the second outlet.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Because the calibration device for the liquid particulate matter detection device of this utility model includes a pure water supply container, a mixing container, a calibration pipeline, and a filtration assembly connected in sequence, the mixing container is provided with a detachable particle receiving box, the pure water supply container is connected to the mixing container through the particle receiving box, the calibration pipeline is used to pass particulate liquid flowing from the mixing container to the filtration assembly, the filtration assembly is used to collect particulate liquid from the calibration pipeline, a flow rate detector and a test liquid particulate matter detection device are arranged near the calibration pipeline, the test liquid particulate matter detection device is closer to the filtration assembly than the flow rate detector, that is, a first predetermined amount of pure water in the pure water supply container flows into the mixing container through the particle receiving box, and a second particulate matter detection device is placed in the particle receiving box. A predetermined amount of particulate matter is used to flush a second predetermined amount of particulate matter into a mixing container when a first predetermined amount of pure water flows through the particulate matter container, forming a liquid containing particulate matter. Then, when the liquid containing particulate matter flows through the calibration pipeline, the flow rate of the liquid containing particulate matter is first determined by a flow rate detector. Then, the first concentration of the liquid containing particulate matter at this flow rate is determined by a liquid particulate matter concentration detection device. Then, the liquid containing particulate matter continues to flow into the suction filtration component. Finally, the second concentration of the liquid containing particulate matter is obtained by a "weighing method". The second concentration is used to calibrate the liquid particulate matter concentration detection device. Therefore, this utility model can be applied to the standardized calibration device for the on-site rapid calibration needs of the aviation oil particulate matter concentration analyzer.

[0016] 2. Because the mixing container of this utility model has a pull-out through hole with a step along its own extension direction and a large opening on the outer surface of the mixing container, and the particle container also has a pull-out plate that is perpendicularly connected to the support plate, the pull-out plate is fitted into the opening of the pull-out through hole on the outer surface of the mixing container, and the inner surface of the mixing container is also provided with a sliding support plate that extends horizontally toward the inside of the mixing container and is located at the lower edge of the pull-out through hole. The upper surface of the sliding support plate and the lower surface of the support plate are respectively formed with mutually movable guide rails and guide grooves, so that the particle container can be installed in a pull-out manner with respect to the mixing container. Therefore, this utility model can conveniently place particles onto the support plate.

[0017] 3. Because the bottom of the mixing container of this utility model is also provided with a stirrer and an ultrasonic vibrator, the ultrasonic vibrator is used to disperse the particle clusters formed by multiple particles, and the stirrer is used to stir the particles evenly in the liquid containing particles. Therefore, the particles in the liquid containing particles of this utility model are evenly distributed and can avoid the particles from agglomerating into clusters.

[0018] 4. Because the calibration pipeline of the mixing container of this utility model has a first outlet and a second outlet, and the calibration pipeline is connected to the first outlet and the second outlet by a two-position three-way valve, and the liquid with particulate matter flows to the filtration assembly through the second outlet, the flow rate of the liquid with particulate matter in the calibration pipeline is unstable in the early stage, and the concentration measurement result at this time is not accurate. Therefore, this utility model, by setting a two-position three-way valve, ensures that when the flow rate is unstable, the liquid with particulate matter is not introduced into the filtration assembly, and when the flow rate of the liquid with particulate matter in the calibration pipeline stabilizes, the liquid with particulate matter is introduced into the filtration assembly, and the second concentration is obtained through the filtration assembly, thereby greatly improving the accuracy of the calibration. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the calibration device for the liquid particulate matter detection device according to an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of the mixing container according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of a mixing container according to an embodiment of the present invention (the particle container is not shown).

[0022] Figure 4 This is a photograph of the actual liquid particulate matter detection device according to an embodiment of the present invention.

[0023] In the diagram: 100. Calibration device for liquid particulate matter detection; 1. Pure water supply container; 2. Liquid delivery pipeline; P1. First booster pump; 3. Mixing container; 3a. Inlet; 3b. Outlet; 3c. Pull-out through hole; D. Inlet direction; 31. Particle container; 311. Support plate; 312. Edge baffle; 313. Pull-out plate; 32. Sliding tray; 32a. Guide rail; 33. Stirrer; 34. Vibrator; 4. Calibration pipeline; 41. First outlet; 42. Second outlet; P2. Second booster pump; 5. Flow rate detector; C. Detection device for liquid particulate matter under test; C1. Inlet; C2. Outlet; C3. Main detection end; C4. Secondary detection end; 6. Two-position three-way valve; 7. Vacuum filtration assembly; 71. Vacuum filtration bottle; 71a. Vacuum filtration branch pipe; 72. Filter layer; 73. Vacuum pump. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following embodiments, in conjunction with the accompanying drawings, specifically describe the calibration device for the liquid particulate matter detection device of this utility model. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0025] like Figure 1 As shown, the device 100 for calibrating the concentration detection device of the liquid particulate matter to be tested in this embodiment is used.

[0026] The device 100 for detecting particulate matter concentration in the liquid to be tested includes a pure water supply container 1, a liquid delivery pipeline 2, a mixing container 3, a calibration pipeline 4, a flow rate detector 5, a two-position three-way valve 6, and a filtration assembly 7.

[0027] The pure water supply container 1, the liquid delivery pipeline 2, the mixing container 3, the calibration pipeline 4, and the vacuum filtration assembly 7 are connected in sequence.

[0028] The pure water supply container 1 is used to hold a first predetermined amount of pure water. The pure water supply container 1 is connected to the mixing container 3 through a first booster pump P1 installed in the liquid delivery pipe 2. Specifically, the first booster pump P1 makes the hydraulic pressure in the liquid delivery pipe 2 reach the first predetermined hydraulic pressure.

[0029] like Figure 2 and Figure 3 As shown, the inner surface of the mixing container 3 has an inlet 3a and an outlet 3b.

[0030] The inlet 3a is connected to the pure water supply container 1, i.e., to the liquid delivery pipe 2, and the orientation of the inlet 3a in the mixing container 3 is taken as the inlet direction D; and the outlet 3b is connected to the calibration pipe 4.

[0031] The mixing container 3 is connected to the filtration assembly 7 via a second booster pump P2 installed in the calibration pipeline 4. Specifically, the second booster pump P2 causes the hydraulic pressure in the calibration pipeline 4 to reach a second predetermined hydraulic pressure.

[0032] The surface of the mixing container 3 has a pull-out through hole 3c. The pull-out through hole 3c has a step along its own extension direction, and the opening of the pull-out through hole 3c on the outer surface of the mixing container 3 is larger. Specifically, the pull-out through hole 3c is located near the inlet 3a. The pull-out through hole 3c has two continuous end diameters pointing from its own extension direction to its own interior. The opening of the pull-out through hole 3c on the outer surface of the mixing container 3 is larger, and the opening of the pull-out through hole 3c on the inner surface of the mixing container 3 is smaller. In this embodiment, the pull-out through hole 3c is a rectangular through hole.

[0033] The inner surface of the mixing container 3 is also provided with a sliding tray 32 that extends horizontally toward the interior of the mixing container 3 and is located at the lower edge of the pull-out through hole. The upper surface of the sliding tray 32 is formed with a guide rail 32a extending in the same direction.

[0034] The mixing container 3 has a removable particle container 31 located inside the mixing container 3 on the pull-out through hole 3c. The pure water supply container 1 is connected to the mixing container 3 through the particle container 31. The pure water supply container 1 is directly connected to the particle container 31 through the liquid delivery pipe 2. The positional potential energy of the particle container 31 is higher than that of the outlet 3b. Specifically, after the pure water enters the mixing container 3 from the inlet 3a, it first flows through the particle container 31 and then falls from the particle container 31 into the mixing container 3, and flows out through the outlet 3b.

[0035] The pellet container 31 has an integral continuous support plate portion 311, an edge baffle portion 312, and a pull-out plate portion 313. Specifically, the edge baffle portion 312 and the pull-out plate portion 313 are located on opposite sides of the support plate portion 313.

[0036] The support plate portion 311 is horizontal and located below the inlet 3a, and the inlet direction D is parallel to the edge baffle portion 312. Specifically, after pure water flows into the mixing container 3 from the inlet 3a, it falls directly onto the upper surface of the support plate portion 311. The upper surface of the support plate portion 311 is used to place a second predetermined amount of particles.

[0037] The lower surface of the support plate 311 is formed with a guide groove structure (not shown in the figure) that is movably engaged with the guide rail 32a, so that the particle container 31 moves linearly in a pull-out manner relative to the mixing container 3, and the particle container 31 is detachably mounted on the mixing container 3.

[0038] The pull-out plate portion 311 is perpendicularly connected to the support plate portion 313. Specifically, the edge baffle portion 312 is perpendicularly continuous with the support plate portion 313.

[0039] The pull-out plate portion 313 is fitted into the opening of the pull-out through hole 3c on the outer surface of the mixing container 3. Specifically, the pull-out plate portion 313 is confined within the larger opening of the pull-out through hole 3c. The support plate portion 311 and the edge baffle portion 312, i.e., the outer surface of the pull-out plate portion 313, are provided with a handle (not shown in the figure) for pulling out the particle container 31. The edge baffle portion 312 is used to prevent the particles on the support plate portion 311 from sliding off the particle container 31 into the interior of the mixing container 3 due to inertia during the pulling process.

[0040] The bottom of the mixing container 3 is also provided with a stirrer 33 and an ultrasonic vibrator 34. The stirrer 33 is used to stir the particles evenly in the liquid containing particles, and the ultrasonic vibrator 34 is used to disperse the particle clusters formed by multiple particles. Specifically, a first predetermined amount of pure water washes a second predetermined amount of particles from the particle container 31 into the interior of the mixing container 3. Through the stirring of the stirrer 33 and the vibration of the ultrasonic vibrator 34, a solution containing particles is formed. In this embodiment, the ultrasonic vibrator 34 is fixed on the inner wall of the calibration pipe 4 near the mixing container 3.

[0041] The calibration pipe 4 is used to pass particulate liquid flowing from the mixing container 3 to the filtration assembly 7. The calibration pipe 4 has a first outlet 41 and a second outlet 42 that are far away from the mixing container 3 and open outward. The calibration pipe 4 is selectively connected to the first outlet 41 and the second outlet 42 through a two-position three-way valve 6. The particulate liquid flows to the filtration assembly through the second outlet 42. Specifically, in the initial stage of the flow of the particulate liquid in the calibration pipe 4, its flow rate is unstable, so its particle density cannot be effectively measured by the particulate detection device C. At this time, the particulate liquid flows out through the first outlet 41. After a predetermined time, the flow rate of the particulate liquid can reach a stable state, so that its particle density can be effectively measured by the particulate detection device C. At this time, the particulate liquid flows out through the second outlet 42.

[0042] A flow rate detector 5 and a particulate matter detection device C for the liquid to be tested are arranged near the calibration pipeline 4. The particulate matter detection device C is closer to the filtration assembly 7 than the flow rate detector 5. Specifically, the second booster pump P2, the flow rate detector 5, and the particulate matter detection device C for the liquid to be tested are arranged in sequence near the filtration assembly 7, and the particulate matter detection device C for the liquid to be tested is located near the flow rate detector 5. The flow rate detector 5 is a non-contact flow meter.

[0043] like Figure 4 As shown, in this embodiment, the particulate matter detection device C for the liquid to be tested has an inflow end C1, an outflow end C2, a main detection end C3, and a secondary detection end C4. The inflow end C1 and the outflow end C2 are respectively connected to the calibration pipe 4. A transparent detection pipe section (not shown in the figure) is formed between the inflow end C1 and the outflow end C2, and the detection pipe section forms part of the calibration pipe 4. The main detection end C3 and the secondary detection end C4 are located on opposite sides of the detection pipe section. When the liquid containing particulate matter flows through the detection pipe section, the main detection end C3 and the secondary detection end C4 emit infrared light toward the liquid containing particulate matter, and the secondary detection end C4 receives the infrared light accordingly. When the liquid containing particulate matter is connected to the filtration assembly 7 through the second outlet 42, the particulate matter detection device C for the liquid to be tested measures the concentration of the liquid containing particulate matter as the first concentration.

[0044] The filtration assembly 7 is used to collect particulate liquid from the calibration pipeline 4. Specifically, the filtration assembly 7 includes a filtration bottle 71, a filter layer 72, and a vacuum pump 73. The filtration bottle 71 has a filtration branch pipe 71a. The mouth of the filtration bottle 71 is connected to the second outlet 42 through the filter layer 72. The vacuum pump 73 filters the liquid entering the filtration bottle 71 through the filtration branch pipe 71a. Finally, the concentration of the particulate liquid is measured by the "weighing method" as the second concentration, and the particulate detection device C of the liquid to be tested is calibrated by the second concentration.

[0045] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art within the scope of the appended claims without creative effort are still within the scope of protection of this patent.

Claims

1. A calibration device for a liquid particulate matter detection device, used to calibrate a liquid particulate matter concentration detection device, characterized in that, include: The system comprises, in sequence, a pure water supply container, a mixing container, a calibration pipeline, and a filtration assembly. The mixing container contains a removable particle container. The pure water supply container is connected to the mixing container via the particle container. The calibration pipeline carries particulate-containing liquid flowing from the mixing container to the filtration assembly. The filtration assembly collects the particulate-containing liquid from the calibration pipeline. A flow rate detector and a particulate matter detection device for the liquid to be tested are arranged near the calibration pipeline, with the particulate matter detection device for the liquid to be tested being closer to the filtration assembly than the flow rate detector.

2. The calibration device for the liquid particulate matter detection device according to claim 1, characterized in that: in, The opening on the inner surface of the mixing container that connects to the pure water supply container is used as the inlet, and the orientation of this inlet within the mixing container is used as the inlet direction. The particle container has an integral and continuous support plate portion and an edge baffle portion located inside the mixing container. The support plate portion is horizontal and located below the inlet, and the edge baffle portion is located at the edge of the support plate portion. The inlet direction is parallel to the edge baffle portion.

3. The calibration device for the liquid particulate matter detection device according to claim 2, characterized in that: in, The mixing container has a pull-out through-hole with a step along its extension direction, and the opening on the outer surface of the mixing container is larger. The particle receiving box also has a pull-out plate portion perpendicularly connected to the support plate portion, which is fitted into the opening of the pull-out through-hole on the outer surface of the mixing container. The inner surface of the mixing container is also provided with a sliding support plate that extends horizontally toward the interior of the mixing container and is located at the lower edge of the pull-out through hole. The upper surface of the sliding support plate and the lower surface of the bearing plate are respectively formed with mutually movable guide rails and guide grooves.

4. The calibration device for the liquid particulate matter detection device according to claim 1, characterized in that: in, The mixing container is connected to the calibration pipeline through the outlet, and the positional potential energy of the particle container is high at the outlet.

5. The calibration device for the liquid particulate matter detection device according to claim 4, characterized in that: in, The outlet is connected to the calibration pipeline via a second booster pump.

6. The calibration device for the liquid particulate matter detection device according to claim 1, characterized in that: in, The pure water supply container is connected to the particle container output via a first booster pump.

7. The calibration device for the liquid particulate matter detection device according to claim 1, characterized in that: in, The bottom of the mixing container is also equipped with a stirrer and an ultrasonic vibrator. The ultrasonic vibrator is used to disperse the particle clusters formed by multiple particles, and the stirrer is used to mix the particles evenly in the liquid containing particles.

8. The calibration device for the liquid particulate matter detection device according to any one of claims 1-7, characterized in that: in, The calibration pipeline has a first outlet and a second outlet. The calibration pipeline is connected to either the first outlet or the second outlet via a two-position three-way valve, and the liquid containing particulate matter flows to the filtration assembly through the second outlet.

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