Intelligent draining and settling system for aviation oil tank

Abstract

The application discloses an intelligent draining and settling system for aviation oil tanks, which comprises a draining and settling pipe group connected with the bottom of an oil storage tank and a draining tank connected with the draining and settling pipe group; the draining and settling pipe group comprises a recovery oil path and a detection oil path, a circulating pump, first and second electromagnetic valves for controlling the opening and closing of the recovery oil path are arranged on the recovery oil path, and the recovery oil path is sequentially provided with the first electromagnetic valve, the circulating pump and the second electromagnetic valve from the oil storage tank to the draining tank; the access end of the detection oil path is arranged between the first electromagnetic valve and the circulating pump, the exit end of the detection oil path is arranged between the circulating pump and the second electromagnetic valve, and the detection oil path is provided with a third electromagnetic valve, a detection module and a gear pump; and the system further comprises a control box, which controls the opening and closing of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the circulating pump and the gear pump according to the detection information of the detection module. The application optimizes the design of the draining and settling pipe group and can automatically drain and settle according to the actual situation.

Description

Technical Field

[0001] This invention belongs to the field of oil tank drainage technology, specifically relating to an intelligent drainage system for aviation fuel tanks. Background Technology

[0002] In existing aviation fuel depots, during the storage of aviation fuel in tanks, trace amounts of dissolved water in the fuel itself, as well as moisture from the air, slowly seep into the fuel through channels such as the breather valve on the tank. This causes the water content of the fuel to gradually increase, and under the influence of gravity, the water slowly settles to the bottom of the tank, often exceeding the standard (rated value of 50 PPM). At the same time, tiny particles in the fuel also settle to the bottom of the tank. To ensure that the fuel supplied to aircraft has a qualified water content and that the particulate matter content of the fuel is within acceptable limits, each depot needs to manually observe and drain the fuel every day. However, it is impossible to accurately know the exact level of contamination and water content of the fuel.

[0003] Existing external equipment and oil storage tanks may contain oil with water content and contamination levels that do not meet specified requirements, and may not be able to discharge substandard oil. Summary of the Invention

[0004] To enable the equipment to achieve rapid and automatic sediment removal, this invention provides an automatic sediment removal system that can be connected to the pipelines of oil storage tanks and recovery tanks as needed. The system automatically detects the water content and contamination level of the oil in the storage tanks at regular intervals, and determines whether the water content and contamination level meet the requirements through a specified (or existing) program. Based on the results, it then determines whether to extract the oil from the storage tanks.

[0005] The technical solution adopted in this invention is as follows:

[0006] In a first aspect, the present invention provides an intelligent drainage system for aviation fuel tanks, used for drainage management of the bottom of fuel storage tanks containing aviation fuel, including a drainage pipe assembly connected to the bottom of the fuel storage tank and a discharge tank connected to the drainage pipe assembly;

[0007] The discharge pipe assembly includes a recovery oil circuit and a detection oil circuit. The recovery oil circuit is equipped with a circulation pump and a first solenoid valve and a second solenoid valve for controlling the opening and closing of the recovery oil circuit. The recovery oil circuit consists of the first solenoid valve, the circulation pump and the second solenoid valve in sequence from the oil storage tank to the oil discharge tank.

[0008] The inlet of the detection oil circuit is located between the first solenoid valve and the circulating pump, and the outlet of the detection oil circuit is located between the circulating pump and the second solenoid valve. The detection oil circuit is equipped with a third solenoid valve, a detection module, and a gear pump.

[0009] It also includes a control box, which controls the opening and closing of the first solenoid valve, the second solenoid valve, the third solenoid valve, the circulating pump, and the gear pump based on the detection information from the detection module.

[0010] In conjunction with the first aspect, the present invention provides a first embodiment of the first aspect, wherein the circulating pump is a diaphragm pump, and the detection module includes a moisture detection sensor and a particulate matter detection sensor.

[0011] In conjunction with the first embodiment of the first aspect, the present invention provides a second embodiment of the first aspect, wherein the moisture detection sensor and the particulate matter detection sensor are mounted on the same frame, the frame having at least two parallel branches, and the moisture detection sensor and the particulate matter detection sensor are respectively mounted on the two branches.

[0012] In conjunction with the first aspect, the present invention provides a third embodiment of the first aspect, wherein the detection module is an integrated moisture contamination detection component disposed on the detection oil circuit.

[0013] In conjunction with the first aspect, the present invention provides a fourth embodiment of the first aspect, wherein the oil discharge tank is a storage container in a quality inspection system installed on an oil storage tank, the inlet of the oil recovery circuit is connected to the oil storage tank from the quality inspection system, and the outlet of the oil recovery circuit is installed on the oil discharge tank pipeline of the quality inspection system.

[0014] In conjunction with several embodiments of the first aspect, the present invention provides a fifth embodiment of the first aspect, wherein a Y-type filter is provided on the recovery oil line, and the Y-type filter is disposed between the connection port of the circulation pump and the detection oil line connecting the recovery oil line.

[0015] In conjunction with the first aspect, the present invention provides a sixth embodiment of the first aspect, wherein a manual ball valve is provided on the recovery oil line, the manual ball valve is located between the third solenoid valve and the drain tank, and a reversing valve is provided on the recovery oil line, through which a circulation pump is connected.

[0016] In conjunction with the sixth embodiment of the first aspect, the present invention provides a seventh embodiment of the first aspect, wherein the oil discharge tank is provided with a floating mechanism that floats with the liquid surface, the port of the floating mechanism is below the liquid surface, and the floating mechanism is connected to the recovery oil circuit through a pipe.

[0017] A one-way valve is provided on the detection oil circuit, and the one-way valve is located between the detection module and the connection between the detection oil circuit and the recovery oil circuit.

[0018] In conjunction with several embodiments of the first aspect, the present invention provides an eighth embodiment of the first aspect, wherein the control box is pre-set with a sampling and detection program, the sampling and detection program is set with a detection cycle, and after the detection cycle is reached, the sampling process is carried out with the recovery oil circuit closed. A quantity of oil mixture is drawn from the bottom of the oil storage tank at a flow rate of a and enters the detection oil circuit, and the water content data of the oil mixture flowing through the detection module is used to determine the water content.

[0019] If the moisture content is within acceptable limits, the oil in the detection oil circuit is discharged into the drain tank to complete a single sampling process. If the moisture content is not within acceptable limits, the recovery oil circuit is opened simultaneously with the detection oil circuit to perform a drainage process. During the drainage process, a total of B units of oil mixture are simultaneously delivered into the drain tank. The detection module performs continuous detection, and the flow rate of the detection oil circuit is less than 5% of the flow rate of the recovery oil circuit.

[0020] If the moisture content in the detection module fails to meet the requirements after the B-volume oil mixture is delivered, the control box controls the delivery of the B-volume oil mixture and sequentially circulates the drainage process. If the moisture content in the detection module meets the requirements before the B-volume delivery condition is met, the control box controls the closure of the recovery oil circuit to complete the drainage process. The control box continuously monitors the oil circuit to deliver the A-volume oil for sampling and records the average moisture content during the entire A-volume delivery process. When the average moisture content meets the requirements, the single test is completed and the system waits for the next test cycle. If the average moisture content fails to meet the requirements, the control box controls the opening of the recovery oil circuit to deliver the B-volume oil again for continuous testing until the moisture content meets the requirements.

[0021] In conjunction with the eighth embodiment of the first aspect, the present invention provides a ninth embodiment of the first aspect, wherein a circulation pump with a reversing valve is provided on the recovery oil line, and a buffer tank is provided at the connection between the recovery oil line and the detection oil line, and a one-way valve is provided on the detection oil line to form a one-way flow direction from the buffer tank to the detection module and then to the recovery oil line.

[0022] The buffer tank is configured with a first discharge capacity and a second discharge capacity, the first discharge capacity being capacity A and the second discharge capacity being capacity B, which are controlled by a fourth solenoid valve located at the outlet of the buffer tank.

[0023] During the sampling process, an A amount of oil from the bottom of the storage tank is drawn into the buffer tank using a forward circulation pump, and then the buffer tank is connected to the detection oil circuit for testing.

[0024] During the drainage process, a forward circulation pump draws a B amount of oil from the bottom of the storage tank into the buffer tank, and first discharges an A amount of the oil mixture into the testing oil circuit for testing. If the average water content is not up to standard, the remaining oil and the oil in the testing oil circuit are discharged into the drain tank simultaneously. If the average water content is up to standard, the oil in the testing oil circuit is discharged into the drain tank, and the remaining oil mixture in the buffer tank is discharged back into the storage tank.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) This invention solves the problem that the existing sedimentation system cannot accurately detect the oil pollution level and water content ppm value and cannot intelligently discharge sediment, which greatly improves the efficiency of on-site work.

[0027] (2) This invention is a fully automatic device. After the relevant parameters are set, the device will run automatically and automatically detect the water content of the oil. If the water content is not up to standard, the oil will be automatically transported back to the recycling tank of the quality inspection system until the water content is up to standard.

[0028] (3) The present invention is also equipped with an oil solid particle contamination detection module, which can simultaneously detect the solid particle contamination of the oil. When the contamination level is unqualified, the oil is automatically transported back to the recycling tank of the quality inspection system.

[0029] (4) This invention upgrades the existing system in parallel without changing the existing quality inspection and recycling system of the oil depot. It is safe and reliable, ensuring that the water content and pollution level of aviation fuel are qualified. It also realizes remote observation data and remote control functions. Attached Figure Description

[0030] Figure 1 This is a simplified structural diagram of the sedimentation system in Embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the drainage system in Embodiment 2 of the present invention.

[0032] In the diagram: 1-Manual ball valve, 2-Second solenoid valve, 3-Moisture contamination detection component, 4-Y-type filter, 5-Diaphragm pump, 6-Oil storage tank, 7-Oil drain tank, 8-Recovery oil circuit, 9-Detection oil circuit, 10-Control box, 11-First solenoid valve, 12-Circulation pump, 13-Gear pump, 14-Third solenoid valve. Detailed Implementation

[0033] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for 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, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0039] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] Example 1:

[0041] This embodiment discloses an intelligent drainage system for aviation fuel tanks, which automatically manages the drainage of the bottom of the fuel storage tank 6 for storing aviation kerosene.

[0042] Reference Figure 2 It provides a relatively concise explanation of the structure, connection relationships, and principles.

[0043] The two parts shown on either side of the diagram are the oil storage tank 6 and the oil discharge tank 7. The diagram illustrates a simplified structure; in reality, the oil storage tank 6 is significantly larger than the oil discharge tank 7, and their proportions and appearances are also different. The diagram is only used as a reference to show the containers and their connections.

[0044] A drain pipe assembly is installed between the oil storage tank 6 and the oil discharge tank 7 to discharge the oil-water mixture at the bottom of the oil storage tank 6 into the oil discharge tank 7.

[0045] The discharge pipe assembly includes a recovery oil line 8 and a detection oil line 9. The recovery oil line 8 is equipped with a circulation pump 12 and a first solenoid valve 11 and a second solenoid valve 2 for controlling the opening and closing of the recovery oil line 8. The recovery oil line 8 consists of the first solenoid valve 11, the circulation pump 12 and the second solenoid valve 2 in sequence from the oil storage tank 6 to the oil discharge tank 7.

[0046] The inlet of the detection oil circuit 9 is located between the first solenoid valve 11 and the circulation pump 12, and the outlet of the detection oil circuit 9 is located between the circulation pump 12 and the second solenoid valve 2. The detection oil circuit 9 is equipped with a third solenoid valve 14, a detection module and a gear pump 13.

[0047] The drainage system in this embodiment is also equipped with a control box 10, which contains a PLC control module. The control box 10 controls the opening and closing of the first solenoid valve 11, the second solenoid valve 2, the third solenoid valve 14, the circulation pump 12, and the gear pump 13 according to the detection information of the detection module.

[0048] In principle, the entire system consists of two parallel pipelines, which are shown in the diagram as a simplified connection sequence. However, in practice, the recovery oil line 8 is the main pipeline, and its diameter and the specifications of other related equipment are larger than those of the detection oil line 9, resulting in a difference in the flow rates of the two oil lines. The flow rate of the recovery oil line 8 is greater than that of the detection oil line 9.

[0049] Since the entire system is automatically controlled by a preset program in the control box 10, compared with the existing technology, by setting the detection cycle through the detection module, it can achieve the effect of automatic detection and accurate sinking, replacing manual labor. At the same time, it can save fuel consumption and avoid the overly conservative sinking rules used in manual sinking to ensure fuel quality.

[0050] In this embodiment, the control box 10 is equipped with a sampling and testing program. The sampling and testing program is set with a testing cycle. After the testing cycle is reached, the sampling process is carried out with the recovery oil circuit 8 closed.

[0051] During the sampling process, control box 10 controls the opening of the first solenoid valve 11, connecting the bottom of oil storage tank 6 to the drainage pipe assembly. Since oil storage tank 6 has a large volume, the oil at its bottom will inevitably have a high discharge pressure. Therefore, in general, the drainage pipe design directly utilizes the drainage pressure of oil storage tank 6 itself as the power source for the pipe assembly, without the need for an active mechanism such as a pump. However, this drainage system is installed in an existing drainage pipe. Due to the optimization of existing equipment, the existing drainage pipe has a pressure reducing valve at the front end to control the pressure of the discharged oil. Therefore, a corresponding pump structure is installed on the drainage pipe assembly to better improve drainage efficiency and avoid the pressure reduction of the pressure reducing valve affecting drainage detection.

[0052] After the first solenoid valve 11 is opened, the speed of the gear pump 13 is controlled so that the bottom of the oil storage tank 6 draws an amount of oil mixture A at a flow rate a into the detection oil circuit 9. The detection module will detect the water content data of the flowing oil in real time, and the control box 10 will make a judgment based on the water content data of the oil mixture flowing through the detection module.

[0053] If the moisture content is within acceptable limits, the oil in the detection oil circuit 9 is discharged into the drain tank 7 to complete a single sampling process. If the moisture content is not within acceptable limits, the recovery oil circuit 8 is opened at the same time as the detection oil circuit 9 to carry out the drainage process. During the drainage process, a total amount B of oil mixture is simultaneously delivered into the drain tank 7. The detection module continuously monitors the flow rate of the detection oil circuit 9, which is less than 5% of the flow rate of the recovery oil circuit 8.

[0054] If the moisture content in the test module fails to meet the requirements after the B-volume oil mixture is delivered, the control box 10 controls the delivery of the B-volume oil mixture and sequentially circulates the drainage process. If the moisture content in the test module meets the requirements before the B-volume delivery condition is met, the control box 10 controls the closure of the recovery oil circuit 8 to complete the drainage process, continuously tests the oil circuit 9 to deliver the A-volume oil for sampling, and records the average moisture content during the entire A-volume delivery process. When the average moisture content meets the requirements, the single test is completed and the system waits for the next test cycle. If the average moisture content fails to meet the requirements, the control box 10 controls the opening of the recovery oil circuit 8 to deliver the B-volume oil again for continuous testing until the moisture content meets the requirements.

[0055] In another implementation, when the detection oil circuit 9 detects that the water content of the oil mixture of quantity A is not up to standard for the first time, it sets the sedimentation to be carried out with the basic quantity B. If the average water content of the oil mixture of quantity B after sedimentation is still not up to standard, the sedimentation amount is increased by a coefficient of 1.2 until the average water content is up to standard, and then the detection of quantity A is resumed.

[0056] By combining the above procedures with the dual-pipe parallel sedimentation system design, not only can the automatic sedimentation effect be achieved, but also the water content of the oil-water mixture discharged each time is strictly controlled by the set flow rate to ensure that it is always unqualified. When it is qualified, the sedimentation is stopped immediately and the test is repeated with a lower flow rate, so as not to over-discharge sedimentation and to save fuel.

[0057] It should be noted that although the oil-water mixture in the existing oil discharge tank 7 will also undergo secondary filtration to recover the oil, if the discharge volume is not controlled, in practice, the oil discharge tank 7 will often be filled with oil and need to be transported out in a single discharge due to the large discharge volume. This not only requires an oil tanker to transfer the oil each time, but also increases the consumption of filtration and recovery materials.

[0058] Furthermore, in order to further improve the accuracy of sedimentation detection, the above scheme was optimized.

[0059] A floating mechanism is provided inside the oil tank 7 at the liquid level, which floats with the liquid level. The port of the floating mechanism is below the liquid level, and the floating mechanism is connected to the recovery oil circuit 8 through a pipe. A one-way valve is provided on the detection oil circuit 9, and the one-way valve is located between the detection module and the connection between the detection oil circuit 9 and the recovery oil circuit 8.

[0060] The recovery oil circuit 8 is equipped with a circulation pump 12 with a reversing valve, and a buffer tank is installed at the connection between the recovery oil circuit 8 and the detection oil circuit 9. The detection oil circuit 9 is equipped with a one-way valve to form a one-way flow direction from the buffer tank to the detection module and then to the recovery oil circuit 8. The buffer tank is set with a first discharge volume and a second discharge volume, the first discharge volume is volume A and the second discharge volume is volume B, which are controlled by a fourth solenoid valve installed at the outlet of the buffer tank.

[0061] During the sampling process, an amount A of oil from the bottom of the storage tank 6 is drawn into the buffer tank by the forward circulation pump 12, and then the buffer tank is connected to the detection oil circuit 9 for detection.

[0062] During the drainage process, the forward circulation pump 12 draws out a B amount of oil from the bottom of the oil storage tank 6 into the buffer tank, and first discharges an A amount of oil mixture into the testing oil circuit 9 for testing. If the average water content is not up to standard, the remaining oil and the oil in the testing oil circuit 9 are discharged into the drain tank 7 at the same time. If the average water content is up to standard, the oil in the testing oil circuit 9 is discharged into the drain tank 7, and the remaining oil mixture in the buffer tank is discharged back into the oil storage tank 6.

[0063] The addition of a circulation pump 12 with a buffer tank and a reversing valve can further reduce the amount of oil with acceptable water content that is discharged during sedimentation testing.

[0064] Furthermore, in this embodiment, the detection module includes a moisture detection sensor and a particulate matter detection sensor.

[0065] The detection module can be implemented in several ways. In one implementation, the detection module is an integrated moisture contamination detection component 3 installed on the detection oil circuit 9. In another implementation, the moisture detection sensor and the particulate matter detection sensor are installed on the same frame, which has at least two parallel branches, with the moisture detection sensor and the particulate matter detection sensor respectively installed on the two branches.

[0066] Reference Figure 1 In this embodiment, the sedimentation drainage system is based on the existing oil pipeline quality inspection system and is set at the bottom of the oil storage tank 6 for sedimentation drainage.

[0067] Among them, the oil discharge tank 7 is a storage container in the quality inspection system installed on the oil storage tank 6. The inlet of the oil recovery line 8 is on the line connecting the quality inspection system to the oil storage tank 6, and the outlet of the oil recovery line 8 is installed on the pipeline of the oil discharge tank 7 of the quality inspection system.

[0068] The recovery oil line 8 is equipped with a diaphragm pump 5 and a Y-type filter 4. The Y-type filter 4 is located between the circulation pump 12 and the connection port of the detection oil line 9 to the recovery oil line 8. The recovery oil line 8 is equipped with a manual ball valve 1, which is located between the third solenoid valve 14 and the drain tank 7. The recovery oil line 8 is also equipped with a reversing valve, which is connected to the circulation pump 12.

[0069] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. An intelligent drainage system for aviation fuel tanks, used for drainage management of the bottom of aviation fuel storage tanks (6), characterized in that: Includes a drain pipe assembly connecting the bottom of the oil storage tank (6) and an oil discharge tank (7) connected to the drain pipe assembly; The discharge pipe assembly includes a recovery oil circuit (8) and a detection oil circuit (9). The recovery oil circuit (8) is equipped with a circulation pump and a first solenoid valve (11) and a second solenoid valve (2) for controlling the opening and closing of the recovery oil circuit (8). The recovery oil circuit (8) consists of the first solenoid valve (11), the circulation pump (12), and the second solenoid valve (2) in sequence from the oil storage tank (6) to the oil discharge tank (7). The inlet of the detection oil circuit (9) is located between the first solenoid valve (11) and the circulating pump (12), and the outlet of the detection oil circuit (9) is located between the circulating pump (12) and the second solenoid valve (2). The detection oil circuit (9) is equipped with a third solenoid valve (14), a detection module and a gear pump (13). It also includes a control box (10), which controls the opening and closing of the first solenoid valve, the second solenoid valve (2), the third solenoid valve (14), the circulating pump (12), and the gear pump (13) based on the detection information of the detection module; The circulating pump is a diaphragm pump (5); the detection module includes a moisture detection sensor and a particulate matter detection sensor; The control box (10) is pre-set with a sampling and testing program. The sampling and testing program is set with a testing cycle. After the testing cycle is reached, the sampling process is carried out in the state of closing the recovery oil circuit (8). The oil storage tank (6) draws an amount of oil mixture A at a flow rate a into the testing oil circuit (9). The water content of the oil mixture flowing through the testing module is judged. If the moisture content is qualified, the oil in the detection oil circuit (9) is discharged into the drain tank (7) to complete a single sampling process. If the moisture content is not qualified, the recovery oil circuit (8) is opened at the same time as the detection oil circuit (9) to carry out the drainage process. During the drainage process, a total amount B of oil mixture is simultaneously delivered into the drain tank (7). The detection module performs continuous detection. The flow rate of the detection oil circuit (9) is less than 5% of the flow rate of the recovery oil circuit (8). If the water content in the test module is not qualified after the B-volume oil mixture is delivered, the control box (10) controls the delivery of the B-volume oil mixture and the drainage process is circulated in sequence; if the water content in the test module is qualified before the B-volume condition is met, the control box (10) controls the closure of the recovery oil circuit (8) to complete the drainage process, and the test oil circuit (9) delivers the A-volume oil for sampling and records the average water content during the entire A-volume delivery process. When the average water content is qualified, the single test is completed and the next test cycle is waited for. If the average water content is not qualified, the control box (10) controls the opening of the recovery oil circuit (8) to deliver the B-volume oil again for continuous testing until the water content is qualified.

2. The intelligent drainage system for aviation fuel tanks according to claim 1, characterized in that: The moisture detection sensor and the particulate matter detection sensor are mounted on the same frame, which has at least two parallel branches, with the moisture detection sensor and the particulate matter detection sensor respectively mounted on the two branches.

3. The intelligent drainage system for aviation fuel tanks according to claim 1, characterized in that: The detection module is an integrated moisture contamination detection component (3) installed on the detection oil circuit (9).

4. The intelligent drainage system for aviation fuel tanks according to claim 1, characterized in that: The oil discharge tank (7) is a storage container in the quality inspection system installed on the oil storage tank (6). The inlet of the oil recovery line (8) is on the line connecting the quality inspection system to the oil storage tank (6), and the outlet of the oil recovery line (8) is installed on the pipeline of the oil discharge tank (7) of the quality inspection system.

5. The intelligent discharge system for aviation fuel tanks according to any one of claims 1-3, characterized in that: The recovery oil circuit (8) is equipped with a Y-type filter (4), which is located between the connection port of the circulation pump (12) and the detection oil circuit (9) to the recovery oil circuit (8).

6. The intelligent drainage system for aviation fuel tanks according to claim 1, characterized in that: The recovery oil circuit (8) is equipped with a manual ball valve (1), which is located between the third solenoid valve (14) and the oil drain tank (7). The recovery oil circuit (8) is equipped with a reversing valve, which is connected to the circulation pump (12).

7. The intelligent drainage system for aviation fuel tanks according to claim 6, characterized in that: The oil discharge tank (7) is equipped with a floating mechanism that floats with the liquid surface. The port of the floating mechanism is below the liquid surface. The floating mechanism is connected to the recovery oil circuit (8) through a pipe. The detection oil circuit (9) is equipped with a one-way valve, which is located between the detection module and the detection oil circuit (9) and the recovery oil circuit (8).

8. The intelligent drainage system for aviation fuel tanks according to claim 1, characterized in that: The recovery oil circuit (8) is equipped with a circulation pump (12) with a reversing valve, and a buffer tank is provided at the connection between the recovery oil circuit (8) and the detection oil circuit (9). The detection oil circuit (9) is provided with a one-way valve to form a one-way flow direction from the buffer tank to the detection module and then to the recovery oil circuit (8). The buffer tank is set with a first discharge volume and a second discharge volume, the first discharge volume being volume A and the second discharge volume being volume B, which are controlled by a fourth solenoid valve located at the outlet of the buffer tank. During the sampling process, an A amount of oil from the bottom of the storage tank (6) is drawn into the buffer tank by a forward circulation pump, and then the buffer tank is connected to the detection oil circuit (9) for detection. During the drainage process, the oil at the bottom of the oil storage tank (6) is pumped out by a forward circulation pump (12) in a quantity B to the buffer tank, and the oil mixture in quantity A is discharged into the detection oil circuit (9) for testing. If the average water content is not up to standard, the remaining oil and the oil in the detection oil circuit (9) are discharged into the drain tank (7) at the same time. If the average water content is up to standard, the oil in the detection oil circuit (9) is discharged into the drain tank (7), and the remaining oil mixture in the buffer tank is discharged back into the oil storage tank (6).

Images