Oiling method and oiling system for ship oil pipeline

Abstract

The present application relates to the field of ship technology, and more specifically, to a ship oil pipeline oiling method and oiling system. In the ship oil pipeline oiling method of the present application, by setting a branch flowmeter, a branch regulating valve, and an oil quality online measuring device on the branch pipeline that needs oiling, the purification status and oiling flow of each branch pipeline that needs oiling can be obtained, and then the opening of each branch regulating valve is adjusted to distribute the flow to each branch, the branch regulating valve opening on the branch pipeline that needs oiling with better oil quality is adjusted to a smaller opening, and the branch regulating valve opening on the branch pipeline that needs oiling with poorer oil quality is adjusted to a larger opening, and the flow is distributed to the branch pipeline with poorer cleanliness, so as to perform a superior flow distribution and improve the overall oiling efficiency.

Description

Technical Field

[0001] The present application relates to the field of ship technology, and in particular to a ship oil pipeline oiling method and oiling system. Background Art

[0002] The descriptions in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] At present, domestic shipyards still use conventional oil injection methods for fuel, lubricating oil, hydraulic oil and other oil pipelines in ship systems. Generally, oil is injected in the indoor environment first, and then a temporary circuit is built after external installation for oil injection. The oil injection results are confirmed by visually inspecting the dirtiness of the filter element or filter paper in the branch filter and combining it with sampling and testing.

[0004] In the conventional pipeline oiling process, since there is no quantifiable control indicator for process control, the oiling time is judged according to past experience, which is relatively subjective and the judgment basis is vague. Manual control is usually more conservative, resulting in a long pipeline oiling time, low efficiency, and a large number of manpower required to cooperate with the test. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a method for oiling a ship oil pipeline, which is used to improve the oiling efficiency of the ship oil pipeline.

[0006] Another purpose of the embodiments of the present application is to provide a ship oil pipeline oiling system for implementing the above-mentioned ship oil pipeline oiling method.

[0007] In a first aspect, a method for oiling a ship oil pipeline is provided, comprising the following steps:

[0008] An oil injection circuit is constructed according to each branch pipeline that needs oil injection in the actual ship system. Each branch pipeline that needs oil injection is equipped with a branch filter, a branch flow meter, a branch regulating valve and an oil quality online measuring device. The branch filter is used to capture impurities carried by the oil in the branch pipeline that needs oil injection. The branch flow meter is used to detect the oil injection flow in the branch pipeline that needs oil injection in real time. The branch regulating valve is used to adjust the oil injection flow in each branch pipeline that needs oil injection. The oil quality online measuring device is used to detect the oil quality in the branch pipeline that needs oil injection in real time.

[0009] According to the test results of the oil quality online measuring device on each branch pipeline that needs oil investment and the test results of the branch flowmeter, the opening of the branch regulating valve on each branch pipeline that needs oil investment is adjusted to distribute the flow to each branch pipeline that needs oil investment: increase the oil investment flow in the branch pipeline that needs oil investment with low oil cleanliness, and reduce the oil investment flow in the branch pipeline that needs oil investment with high oil cleanliness.

[0010] In a possible implementation, at least one oil quality online measuring device is a downstream oil quality online measuring device, and the downstream oil quality online measuring device is arranged downstream of the branch filter.

[0011] In one possible implementation scheme, at least one online oil quality measuring device is an upstream online oil quality measuring device, which is arranged upstream of the branch filter. According to the particle contamination data measured by the upstream online oil quality measuring device, the filtration accuracy of the filter element in the branch filter on the branch pipeline where oil is to be added is adjusted, so that the filter element with the lowest filtration accuracy can be used under the premise that the filter meets the filtration requirements.

[0012] In a possible implementation, an oil tank is provided in the oil injection circuit, an oil pump is provided downstream of the oil tank, and an oil inlet filter is arranged between the oil tank and the oil pump.

[0013] In a possible implementation, an intermediate filter is arranged between the oil pump and the branch pipeline requiring oil injection.

[0014] In a possible implementation, the oil injection circuit includes an oil return main line connected to each branch line to be injected with oil, and the oil return main line is provided with a main line flow meter for detecting the injection flow rate in the main line.

[0015] In one possible implementation, when constructing the oil injection circuit according to each branch pipeline that needs to inject oil in the actual ship system, the flow simulation calculation of the planned oil injection circuit is performed through simulation software. If the oil flow rate in the oil injection circuit does not meet the requirements, the oil injection circuit is adjusted or reconstructed.

[0016] In the second aspect, a ship oil pipeline oil injection system is also provided, including an oil injection pipeline used to form an oil injection loop with a branch pipeline requiring oil injection, and also including a branch filter, a branch flow meter, a branch regulating valve and an oil quality online measuring device, wherein the branch filter, the branch flow meter, the branch regulating valve and the oil quality online measuring device are all used to be arranged on the branch pipeline requiring oil injection; and also including an oil injection controller, wherein the branch flow meter and the oil quality online measuring device are both communicatively connected to the oil injection controller to transmit the detected data to the oil injection controller, and the oil injection controller is communicatively connected to the branch regulating valve, and the oil injection controller adjusts the opening of the branch regulating valve on each branch pipeline requiring oil injection according to the received branch flow meter detection data and the oil quality online measuring device detection data to distribute the flow to each branch pipeline requiring oil injection: increase the oil injection flow in the branch pipeline requiring oil injection with low oil cleanliness, and reduce the oil injection flow in the branch pipeline requiring oil injection with high oil cleanliness.

[0017] In a possible implementation, at least one oil quality online measuring device is a downstream oil quality online measuring device, and the downstream oil quality online measuring device is used to be arranged downstream of the branch filter.

[0018] In one possible implementation, at least one online oil quality measuring device is an upstream online oil quality measuring device, which is used to be arranged upstream of the branch filter to adjust the filtration accuracy of the filter element in the branch filter on the branch pipeline where oil needs to be added according to the particle contamination data measured by the upstream online oil quality measuring device, so that the filter element with the lowest filtration accuracy can be used under the premise that the filter meets the filtration requirements.

[0019] The ship oil pipeline oiling method in the present application has the beneficial effects: in the ship oil pipeline oiling method in the present application, by arranging a branch flow meter, a branch regulating valve, and an oil quality online measuring device on the branch pipeline that needs oiling, the purification condition and oiling flow rate of each branch pipeline that needs oiling can be obtained, and then the opening of each branch regulating valve is adjusted to distribute the flow to each branch, the opening of the branch regulating valve on the branch pipeline that needs oiling with better oil quality is adjusted to a smaller opening, and the opening of the branch regulating valve on the branch pipeline that needs oiling with poorer oil quality is adjusted to a larger opening, and the flow is distributed to the branch pipeline with poorer cleanliness, so as to perform advantageous flow distribution and improve the overall oiling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a flow chart of an embodiment of a method for oiling a ship oil pipeline according to the present application;

[0022] Figure 2 The figure is a schematic diagram of an oil injection circuit in an embodiment of a method for injecting oil into a ship oil pipeline according to the present application (solid lines represent oil circuits, and dot-dash lines represent signal circuits);

[0023] The reference numerals are described as follows:

[0024] 1. Branch pipeline to be injected with oil; 2. Branch filter; 3. Branch flowmeter; 4. Branch regulating valve; 5. Oil quality online measuring device; 51. Downstream oil quality online measuring device; 52. Upstream oil quality online measuring device; 6. Oil tank; 7. Oil pump; 8. Oil inlet filter; 9. Intermediate filter; 10. Oil return main pipeline; 11. Main pipeline flowmeter; 12. Cleaning control system; 13. Maintenance branch; 14. Maintenance electric control valve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0027] According to the first aspect of the present application, a method for oiling a ship oil pipeline is first provided. Figure 1 and Figure 2 .

[0028] The method for oiling the ship oil pipeline includes the following steps:

[0029] An oil injection circuit is constructed according to each branch pipeline that needs oil injection in the actual ship system. A branch filter 2, a branch flow meter 3, a branch regulating valve 4 and an oil quality online measuring device 5 are arranged in each branch pipeline 1 that needs oil injection. The branch filter 2 is used to capture impurities in the branch pipeline 1 that needs oil injection, the branch flow meter 3 is used to monitor the flow in the branch pipeline 1 that needs oil injection in real time, the branch regulating valve 4 is used to adjust the flow of each branch pipeline 1 that needs oil injection, and the oil quality online measuring device 5 is used to detect the oil quality in the branch pipeline 1 that needs oil injection in real time.

[0030] According to the test results of the oil quality online measuring device 5 on each branch pipeline 1 requiring oil injection and the test results of the branch flowmeter 3, the opening of the branch regulating valve 4 on each branch pipeline 1 requiring oil injection is adjusted to distribute the flow to each branch pipeline 1 requiring oil injection: the oil injection flow of the branch pipeline 1 requiring oil injection with low oil cleanliness is increased, and the oil injection flow of the branch pipeline 1 requiring oil injection with high oil cleanliness is decreased. The oil with high cleanliness has better quality and less pollution, while the oil with low cleanliness has worse quality and more serious pollution.

[0031] In the ship oil pipeline oiling method of the present application, by arranging a branch flowmeter 3, a branch regulating valve 4, and an oil quality online measuring device 5 on the branch pipeline 1 that needs oiling, the purification condition and oiling flow rate of each branch pipeline that needs oiling can be obtained, and then the opening of each branch regulating valve 4 is adjusted to distribute the flow to each branch pipeline that needs oiling. The opening of the branch regulating valve 4 on the branch pipeline 1 that needs oiling with better oil quality is adjusted to a smaller opening, and the opening of the branch regulating valve 4 on the branch pipeline 1 that needs oiling with poorer oil quality is adjusted to a larger opening, so that the flow is distributed to the branch pipeline with poorer cleanliness, and a superior flow distribution is performed, thereby improving the overall oiling efficiency.

[0032] In order to save manpower, an oil injection controller is provided, which receives information from the branch flow meter 3 and the oil quality online measuring device 5 and dynamically and automatically adjusts the branch regulating valve 4 according to the received information. In this embodiment, the branch regulating valve 4 is an electric regulating valve. In other embodiments, the branch regulating valve can also be a hydraulically controlled regulating valve.

[0033] In this embodiment, in order to improve the construction efficiency of the oil injection circuit, when constructing the oil injection circuit according to each branch pipeline 1 that needs to inject oil in the actual ship system, the planned oil injection circuit is simulated and calculated by the simulation software. If the flow rate of the oil in the oil injection circuit does not meet the requirements, the oil injection circuit is adjusted or reconstructed. Through the simulation calculation of the simulation software, the debugging of the oil injection circuit during the actual operation is reduced, and the construction efficiency of the oil injection circuit is improved.

[0034] Specifically, in this embodiment, the oil injection circuit is preliminarily constructed according to the system pipeline layout and the actual ship situation, the pipeline is simulated and calculated using AFT software according to the oil injection circuit and system equipment configuration, and the oil injection circuit is optimized according to the simulation calculation results.

[0035] Specifically, in this embodiment, one oil quality online measuring device 5 is a downstream oil quality online measuring device 51. On the same branch pipeline 1 that needs oil injection, the downstream oil quality online measuring device 51 is arranged downstream of the branch filter 2. In order to further improve the oil injection efficiency, in this embodiment, one oil quality online measuring device 5 is an upstream oil quality online measuring device 52. On the same branch pipeline 1 that needs oil injection, the upstream oil quality online measuring device 52 is arranged upstream of the branch filter 2. According to the particle contamination data measured by the upstream oil quality online measuring device 52, the filtration accuracy of the filter element in the branch filter 2 on the branch pipeline 1 that needs oil injection is adjusted, so that the filter element with the lowest filtration accuracy is used under the premise that the filter meets the filtration requirements. In other embodiments, the number of downstream oil quality online measuring devices can be more than two, or only an upstream oil quality online measuring device or only a downstream oil quality online measuring device can be set.

[0036] Specifically, the upstream oil quality online measuring device 52 and the downstream oil quality online measuring device 51 can monitor the oil injection status of the entire system pipeline in real time. According to the pollution level NAS level of each stage, the particle size of the mainstream pollutants in the current stage is analyzed, and the appropriate filter element accuracy is selected so that the filter element accuracy of the filter can meet the filtering requirements, and the impact on the oil flow rate is minimized to improve the oil injection efficiency. In this embodiment, the filter is equipped with a differential pressure measurement module that can measure the differential pressure signal on the upstream and downstream sides of the filter element, and the data measured by the differential pressure measurement module is uploaded to the cleaning control system. The cleaning control system can automatically prompt the filter element to be dirty and blocked and can guide the replacement of the filter element. In this embodiment, the oil quality online measuring device 5 can measure the mainstream pollutant particles and water content in the oil outlet pipe online.

[0037] In order to improve the quality of the oil entering the branch pipeline 1 that needs to be injected with oil, in this embodiment, an oil tank 6 is provided in the oil injection circuit, an oil pump 7 is provided downstream of the oil tank 6, and an oil inlet filter 8 is arranged between the oil tank 6 and the oil pump 7. In other embodiments, as needed, the intermediate filter can be eliminated if the oil quality in the oil tank can be guaranteed to be high. The oil tank 6 in the present application can be an external oil tank when constructing the oil injection circuit, or it can be an oil tank in the ship's oil system that needs to be injected with oil and purified when constructing the oil injection circuit. Similarly, the part between the oil tank 6 and the branch pipeline 1 that needs to be injected with oil can also be an oil pipeline that needs to be injected with oil and purified. In this embodiment, three oil pumps 7 are provided, and the three oil pumps are standby for each other to improve reliability. In other embodiments, one oil pump can be provided.

[0038] In this embodiment, an intermediate filter 9 is arranged between the oil pump 7 and the oil branch pipeline 1. The intermediate filter 9 can further improve the cleanliness of the oil entering the oil branch pipeline 1. In other embodiments, the number of intermediate filters can be increased as needed. Of course, according to the needs of actual operating conditions, the oil pumped out by the oil pump can be directly fed into the oil branch pipeline without filtering.

[0039] Through the oil inlet filter 8, the intermediate filter 9 and the branch filter 2, the impurities in the oil tank 6 and the pipeline are intercepted and filtered in sections. The use of a multi-stage filtration solution for efficient filtration can effectively shorten the series washing time and improve the oil injection efficiency.

[0040] In this embodiment, the oil injection circuit includes an oil return main line 10 connected to each branch line 1 to be injected with oil, and a main line flow meter 11 for detecting the injection flow rate in the main line is provided on the oil return main line 10. The detection result of the main line flow meter 11 is converted into the pipeline flow rate to judge whether the flow rate in the pipeline meets the injection flow rate requirement.

[0041] In this embodiment, the oil injection controller is integrated in the cleaning control system 12, and the cleaning control system 12 includes a display, which can monitor the opening of each regulating valve, the filter pressure difference, the measurement information of the oil quality online measuring device 5, and the flow meter detection data, and realize the digital control of oil injection, which further improves the oil injection efficiency. In other embodiments, the flow of each branch pipeline that needs oil injection can also be adjusted by manually adjusting the opening of the branch regulating valve.

[0042] For the convenience of maintenance, a maintenance branch 13 is also provided between the oil pump and the branch pipeline to be supplied with oil. A maintenance electric control valve 14 is provided on the maintenance branch 13. When the branch pipeline to be supplied with oil is suspended, the maintenance electric control valve 14 can close the branch regulating valve 4 and open the maintenance electric control valve 14. At this time, the branch pipeline to be supplied with oil can be inspected. The maintenance work includes replacing the filter element, replacing or repairing other parts on the branch pipeline to be supplied with oil. For the convenience of operation, the branch regulating valve 4 is provided at the upstream end of the branch pipeline to be supplied with oil 1.

[0043] In this embodiment, the ship oil pipeline oiling method is implemented by the ship oil pipeline oiling system. The ship oil pipeline oiling system is introduced below:

[0044] The ship oil pipeline oil injection system includes an oil injection pipeline used to form an oil injection loop with a branch pipeline requiring oil injection, and also includes a branch filter 2, a branch flowmeter 3, a branch regulating valve 4 and an oil quality online measuring device 5. The branch filter 2, the branch flowmeter 3, the branch regulating valve 4 and the oil quality online measuring device 5 are all used to be arranged on the branch pipeline 1 requiring oil injection; it also includes an oil injection controller. The branch flowmeter 3 and the oil quality online measuring device 5 are all communicatively connected with the oil injection controller to transmit the detected data to the oil injection controller. The oil injection controller is communicatively connected with the branch regulating valve 4. The oil injection controller adjusts the opening of the branch regulating valve 4 on each branch pipeline 1 requiring oil injection according to the received detection data of the branch flowmeter 3 and the data detected by the oil quality online measuring device 5 to distribute the flow to each branch pipeline 1 requiring oil injection: increase the oil injection flow of the branch pipeline 1 requiring oil injection with low oil cleanliness, and reduce the oil injection flow of the branch pipeline 1 requiring oil injection with high oil cleanliness.

[0045] The ship oil pipeline oil injection system further includes an oil tank 6 and an oil pump 7 arranged downstream of the oil tank 6 , and an oil inlet filter 8 is arranged between the oil pump 7 and the oil tank 6 .

[0046] One oil quality online measuring device 5 is a downstream oil quality online measuring device 51, which is used to be arranged downstream of the branch filter 2. One oil quality online measuring device 5 is an upstream oil quality online measuring device 52, which is used to be arranged upstream of the branch filter 2. According to the particle contamination data measured by the upstream oil quality online measuring device 52, the filtering accuracy of the filter element in the branch filter 2 on the branch pipeline 1 where oil needs to be added is adjusted, so that the filter element with the lowest filtering accuracy can be used under the premise that the filter meets the filtering requirements.

[0047] The structure of the oil injection circuit is the same as that described in the above-mentioned ship oil pipeline injection method, and will not be repeated here.

[0048] In the above embodiment, three branch pipelines 1 for oil injection are provided. In other embodiments, any number of branch pipelines 1 for oil injection can be provided, more than two, according to the needs.

[0049] In summary, the ship oil pipeline oiling method of the present application has the following technical effects:

[0050] The oil injection circuit uses AFT software to perform flow field simulation to obtain the estimated flow rate and velocity of each branch pipeline that needs oil injection, so as to avoid unreasonable construction of the oil injection circuit.

[0051] The oil injection control system can optimize the flow rate by adjusting the mass flow regulating valve according to the flow monitoring of each branch pipeline that needs oil injection and the online measurement data of each branch pipeline that needs oil injection, which can improve the oil injection efficiency. The oil injection control system can also digitally control the entire process of pipeline oil injection to reduce the manpower input of oil injection.

[0052] The particle contamination data of each branch is measured by the oil quality online measurement equipment, and the accuracy of each filter element is configured in a step-by-step manner to improve the oil injection efficiency. The pressure difference signal of the filter guides the replacement of the filter element to further improve the oil injection efficiency.

[0053] The oil quality online measuring equipment can be used to measure the moisture and particle contamination data of each branch pipeline that needs oil injection, and the pipeline cleanliness status can be controlled in real time to avoid unnecessary oil injection time.

[0054] According to the second aspect of the present application, a ship oil pipeline oiling system for implementing the above-mentioned ship oil pipeline oiling method is also provided. The structure of the ship oil pipeline oiling system is the same as the ship oil pipeline oiling system described in any embodiment of the above-mentioned first aspect, and will not be repeated here.

[0055] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for oiling a ship oil pipeline, characterized in that: The following steps are involved: An oil injection circuit is constructed according to each branch pipeline (1) that needs oil injection in the actual ship system, and a branch filter (2), a branch flow meter (3), a branch regulating valve (4) and an oil quality online measuring device (5) are arranged on each branch pipeline (1) that needs oil injection, the branch filter (2) is used to capture impurities carried by the oil in the branch pipeline (1) that needs oil injection, the branch flow meter (3) is used to detect the oil injection flow in the branch pipeline (1) that needs oil injection in real time, the branch regulating valve (4) is used to adjust the oil injection flow in each branch pipeline (1) that needs oil injection, and the oil quality online measuring device (5) is used to detect the oil quality in the branch pipeline (1) that needs oil injection in real time; According to the detection results of the oil quality online measuring device (5) on each branch pipeline (1) requiring oil injection and the detection results of the branch flow meter (3), the opening of the branch regulating valve (4) on each branch pipeline (1) requiring oil injection is adjusted to distribute the flow to each branch pipeline (1) requiring oil injection: the oil injection flow in the branch pipeline (1) requiring oil injection with low oil cleanliness is increased, and the oil injection flow in the branch pipeline (1) requiring oil injection with high oil cleanliness is decreased.

2. The method for oiling a ship oil pipeline according to claim 1, characterized in that: At least one oil quality online measuring device (5) is a downstream oil quality online measuring device (51), and the downstream oil quality online measuring device (51) is arranged downstream of the branch filter (2).

3. The method for oiling a ship oil pipeline according to claim 2, characterized in that: At least one of the oil quality online measuring devices (5) is an upstream oil quality online measuring device (52), which is arranged upstream of the branch filter (2). Based on the particle contamination data measured by the upstream oil quality online measuring device (52), the filtering accuracy of the filter element in the branch filter (2) on the branch pipeline (1) to be injected with oil is adjusted, so that the filter element with the lowest filtering accuracy is used under the premise that the filter meets the filtering requirements.

4. The method for oiling a ship oil pipeline according to claim 2 or 3, characterized in that: An oil tank (6) is arranged in the oil injection circuit, an oil pump (7) is arranged downstream of the oil tank (6), and an oil inlet filter (8) is arranged between the oil tank (6) and the oil pump (7).

5. The method for oiling a ship oil pipeline according to claim 4, characterized in that: An intermediate filter (9) is arranged between the oil pump (7) and the branch pipeline (1) to be supplied with oil.

6. The method for oiling a ship oil pipeline according to any one of claims 1 to 3, characterized in that: The oil injection circuit comprises an oil return main line (10) connected to each branch line (1) to be injected with oil, and a main line flow meter (11) for detecting the injection flow rate of the oil in the main line is arranged on the oil return main line (10).

7. The method for oiling a ship oil pipeline according to any one of claims 1 to 3, characterized in that: When constructing an oil injection circuit according to each branch pipeline (1) that needs to inject oil in the actual ship system, the planned oil injection circuit is simulated and calculated by simulation software. If the oil flow rate in the oil injection circuit does not meet the requirements, the oil injection circuit is adjusted or reconstructed.

8. A ship oil pipeline oil injection system, characterized in that: The invention comprises an oil injection pipeline for forming an oil injection circuit with a branch pipeline to be injected with oil, and also comprises a branch filter (2), a branch flow meter (3), a branch regulating valve (4) and an oil quality online measuring device (5), wherein the branch filter (2), the branch flow meter (3), the branch regulating valve (4) and the oil quality online measuring device (5) are arranged on the branch pipeline to be injected with oil (1); and also comprises an oil injection controller, wherein the branch flow meter (3) and the oil quality online measuring device (5) are connected to the oil injection controller for transmitting the oil quality to the injection controller. The measured data is transmitted to the oil injection controller, which is in communication connection with the branch regulating valve (4). The oil injection controller adjusts the opening of the branch regulating valve (4) on each branch pipeline (1) that needs oil injection according to the received detection data of the branch flow meter (3) and the data detected by the oil quality online measuring device (5) to distribute the flow to each branch pipeline (1) that needs oil injection: increase the oil injection flow in the branch pipeline (1) that needs oil injection with low oil cleanliness, and decrease the oil injection flow in the branch pipeline (1) that needs oil injection with high oil cleanliness.

9. The ship oil pipeline oil injection system according to claim 8, characterized in that: At least one oil quality online measuring device (5) is a downstream oil quality online measuring device (51), and the downstream oil quality online measuring device (51) is used to be arranged downstream of the branch filter (2).

10. The ship oil pipeline oil injection system according to claim 9, characterized in that: At least one of the oil quality online measuring devices (5) is an upstream oil quality online measuring device (52), which is arranged upstream of the branch filter (2) to adjust the filtering accuracy of the filter element in the branch filter (2) on the branch pipeline (1) to be injected with oil according to the particle contamination data measured by the upstream oil quality online measuring device (52), so that the filter element with the lowest filtering accuracy is used under the premise that the filter meets the filtering requirements.

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