A method for oiling multiple parallel branches in a hydraulic line system

Abstract

The present application relates to a kind of oiling methods of multiple parallel branch pipes in hydraulic pipeline system, wherein the hydraulic pipeline system includes oil inlet manifold, oil return manifold, annular manifold, annular manifold includes oil distribution manifold and oil collection manifold, oil distribution manifold and oil collection manifold are connected to form annular manifold in series;Oil inlet manifold is connected to oil distribution manifold, and oil return manifold is connected to oil collection manifold;Oil distribution manifold and oil collection manifold are connected with several hydraulic cylinder pipelines, and the hydraulic cylinder pipeline includes oil inlet pipe, hydraulic cylinder and oil return pipe connected in sequence, oil inlet pipe is connected with oil distribution manifold, and oil return pipe is connected with oil collection manifold;When oiling, oiling vehicle is used to first carry out oiling cleaning to annular manifold, then oiling vehicle is used to carry out oiling cleaning to hydraulic cylinder pipeline, and finally oiling cleaning to annular manifold is carried out again.By the oiling method of the present application, oiling of multiple parallel branch pipes in hydraulic pipeline system can be completed by only one oiling vehicle, and uniformity of oiling inside pipeline can be ensured when oiling.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and more specifically to a method for injecting oil into multiple parallel branch pipes in a hydraulic pipeline system. Background Technology

[0002] In shipbuilding, oil injection into pipeline systems is a common task. Hydraulic pipeline systems have many parallel branch pipes connected to the main pipe. In traditional hydraulic pipeline systems, the oil injection process for the parallel branch pipes is often hampered by the large number of parallel branch pipes, resulting in a smaller oil injection flow rate at the end of the system and a poor injection effect. This prolongs the injection cycle, wastes manpower and resources, and compromises quality.

[0003] Existing technologies, such as the invention patent with publication number CN106733952A, disclose a process for cleaning hydraulic pipelines in container ship roll-on / roll-off equipment by oil injection in the dock. This process involves using multiple oil injection vehicles to inject oil into the same hydraulic pipeline, with each vehicle connected to no more than two circulation pipelines. This requires a large number of oil injection vehicles to be deployed on site. Summary of the Invention

[0004] To address the problems of poor oil injection and cleaning effect in parallel branch pipes of hydraulic pipeline systems and low oil injection flow at the end of the system in existing technologies, this invention provides an oil injection method for multiple parallel branch pipes in hydraulic pipeline systems, which can achieve uniform oil injection effect with the help of an oil injection vehicle.

[0005] The technical objective of this invention is achieved through the following technical solution:

[0006] A method for oil injection into multiple parallel branch pipes in a hydraulic pipeline system, wherein the hydraulic pipeline system includes an inlet main pipe, a return main pipe, and a ring main pipe. The ring main pipe includes a branch main pipe and a collector main pipe, which are connected in series to form the ring main pipe. The inlet main pipe is connected to the branch main pipe, and the return main pipe is connected to the collector main pipe. Several hydraulic cylinder pipelines are connected between the branch main pipe and the collector main pipe. The hydraulic cylinder pipeline includes an inlet pipe, a hydraulic cylinder, and a return pipe connected in sequence. The inlet pipe is connected to the branch main pipe, and the return pipe is connected to the collector main pipe. During oil injection, the ring main pipe is first cleaned by oil injection using an oil injection vehicle, then the hydraulic cylinder pipelines are cleaned by oil injection using the same vehicle, and finally the ring main pipe is cleaned by oil injection again.

[0007] Furthermore, before oil flushing, the main oil distribution pipe is disconnected near the main oil inlet pipe to form a first interface and a second interface; the connection between the main oil return pipe and the main oil collection pipe is disconnected to form a third interface and a fourth interface; the connection between the main oil distribution pipe and the main oil collection pipe is disconnected to form a first access end and a second access end; and the connection between the hydraulic cylinder and the inlet and outlet pipes is removed.

[0008] Furthermore, before oil injection, the oil injection vehicle is connected, and the first and third interfaces are sealed; the second and fourth interfaces are connected with temporary pipelines; a first valved pipeline and a second valved pipeline are installed at the first and second access ends respectively; a temporary valved pipeline is installed between the oil inlet pipe and the oil outlet pipe, and the oil inlet pipe, the temporary valved pipeline and the oil outlet pipe form a temporary branch pipe; the main oil inlet pipe and the main oil return pipe are connected to the oil injection vehicle.

[0009] Furthermore, during the ring main oil injection cleaning, all temporary valved pipelines are closed, and the first and second valved pipelines are opened. The oil injection vehicle, the oil inlet main, the oil distribution main on one side, the first valved pipeline, the oil collection main, the second valved pipeline, the oil distribution main on the other side, the oil return main, and the oil injection vehicle form the first circulating oil injection pipeline.

[0010] Furthermore, during the oil filling and cleaning of the hydraulic cylinder pipeline:

[0011] Close the first valved pipeline and the temporary valved pipeline on the side near the second valved pipeline, open the second valved pipeline and the temporary valved pipeline on the side near the first valved pipeline, and the oil injection truck, the main oil inlet pipeline, the main oil distribution pipeline on the side near the first valved pipeline, the temporary branch pipeline on the side near the first valved pipeline, the main oil collection pipeline, the second valved pipeline, the main oil distribution pipeline on the side near the second valved pipeline, the main oil return pipeline, and the oil injection truck form the second circulation oil injection pipeline;

[0012] Close the second valved pipeline and the temporary valved pipeline on the side near the first valved pipeline, open the first valved pipeline and the temporary valved pipeline on the side near the second valved pipeline, and the oil injection truck, the main oil inlet pipeline, the main oil distribution pipeline on the side near the first valved pipeline, the first valved pipeline, the main oil collection pipeline, the temporary branch pipeline on the side near the second valved pipeline, the main oil distribution pipeline on the side near the second valved pipeline, the main oil return pipeline, and the oil injection truck form the third circulation oil injection pipeline;

[0013] The second and third circulation oil injection lines are injected with oil separately.

[0014] Further, after the oil injection is completed, remove the temporary pipeline, the first valved pipeline, the second valved pipeline, the temporary valved pipeline, and the plugs at the first and third interfaces. Reconnect the first and second interfaces, reconnect the third and fourth interfaces, and reconnect the oil distribution main and the oil collection main.

[0015] Furthermore, a temporary outlet hose is connected between the oil injection truck and the main oil inlet pipe, and a temporary return hose is connected between the oil injection truck and the main return pipe. A shut-off valve is installed on both the temporary outlet hose and the temporary return hose.

[0016] Furthermore, the diameter of the temporary outlet hose of the oil tanker is greater than or equal to the diameter of the main inlet hose, and the diameter of the temporary return hose of the oil tanker is greater than or equal to the diameter of the main return hose.

[0017] Furthermore, the diameter of the first valved pipeline is greater than or equal to the diameter of the annular main pipe, the diameter of the second valved pipeline is greater than or equal to the diameter of the annular main pipe, and the diameter of the temporary valved pipeline is greater than or equal to the diameter of the hydraulic cylinder pipeline.

[0018] Compared with the prior art, the beneficial effects of the present invention are that the oil injection method of the hydraulic pipeline system with multiple parallel branches of the present invention only requires one oil injection vehicle to complete the oil injection of multiple parallel branches of the hydraulic pipeline system. In addition, the oil injection can ensure the uniformity of oil injection inside the pipeline, and avoid the problems of small oil flow and inadequate oil injection and cleaning in positions far from the main oil inlet and return pipes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hydraulic pipeline system in this invention.

[0020] Figure 2 This is a schematic diagram of the oil injection construction of multiple parallel branch pipes in the hydraulic pipeline system of this invention.

[0021] Figure 3 This is a schematic diagram of the first circulation oil injection pipeline in this invention.

[0022] Figure 4 This is a schematic diagram of the second circulation oil injection pipeline in this invention.

[0023] Figure 5 This is a schematic diagram of the third circulation oil injection pipeline in this invention.

[0024] In the diagram, 1. Oil inlet main pipe; 2. Oil return main pipe; 3. Ring main pipe; 4. Oil inlet pipe; 5. Hydraulic cylinder; 6. Oil return pipe; 7. Hydraulic pump station; 8. Oil delivery vehicle; 9. Temporary pipeline; 10. First pipeline with valve; 11. Second pipeline with valve; 12. Temporary pipeline with valve; 13. Temporary hose at oil truck outlet; 14. Temporary hose for oil truck return; 15. Shut-off valve; 101. First interface; 102. Second interface; 103. Third interface; 104. Fourth interface; 301. Oil distribution main pipe; 302. Oil collection main pipe. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0026] A method for oil injection into multiple parallel branch pipes in a hydraulic pipeline system, wherein the hydraulic pipeline system is as follows: Figure 1As shown, the system includes an inlet main pipe 1, a return main pipe 2, and a ring main pipe 3. The ring main pipe 3 includes a distribution main pipe 301 and a collection main pipe 302, which are connected in series to form the ring main pipe 3. The inlet main pipe 1 is connected to the distribution main pipe 301, and the return main pipe 2 is connected to the collection main pipe 302. Several hydraulic cylinder pipelines are connected between the distribution main pipe 301 and the collection main pipe 302. The hydraulic cylinder pipelines include an inlet pipe 4, a hydraulic cylinder 5, and a return pipe 6 connected in sequence. The inlet pipe 4 is connected to the distribution main pipe 301, and the return pipe 6 is connected to the collection main pipe 302. When the hydraulic pipeline system is running, the inlet main pipe 1 and the return main pipe 2 are connected to the hydraulic pump station 7 to realize the flow of hydraulic oil. When oil is injected, the inlet main pipe 1 and the return main pipe 2 are not connected to the hydraulic pump station 7, but are connected to the oil injection vehicle 8 for oil injection and cleaning. During oil injection, the oil injection vehicle 8 first cleans the annular main pipe 3 with oil, then cleans the hydraulic cylinder pipeline with oil, and finally cleans the annular main pipe 3 with oil again to remove impurities washed out of the hydraulic cylinder pipeline.

[0027] Specifically, before oil cleaning, the oil distribution main pipe 301 is disconnected near the oil inlet main pipe 1 to form a first interface 101 and a second interface 102; the connection between the return oil main pipe 2 and the oil collection main pipe 302 is disconnected to form a third interface 103 and a fourth interface 104; the connection between the oil distribution main pipe 301 and the oil collection main pipe 302 is disconnected to form a first access end and a second access end; and the connection between the hydraulic cylinder 5 and the oil inlet pipe 4 and the oil outlet pipe 6 is removed.

[0028] The first interface 101 and the third interface 103 are sealed with a sealing plate; the second interface 102 and the fourth interface 104 are connected with a temporary pipeline 9; a first valved pipeline 10 and a second valved pipeline 11 are installed at the first access end and the second access end, respectively; a temporary valved pipeline 12 is installed between the oil inlet pipe 4 and the oil outlet pipe 6, and the oil inlet pipe 4, the temporary valved pipeline 12, and the oil outlet pipe 6 form a temporary branch pipe; the main oil inlet pipe 1 and the main oil return pipe 2 are connected to the oil injection vehicle 8. In this embodiment, a temporary oil truck outlet hose 13 is connected between the oil injection vehicle 8 and the main oil inlet pipe 1, and a temporary oil truck return hose 14 is connected between the oil injection vehicle 8 and the main oil return pipe 2. A shut-off valve 15 is installed on the temporary oil truck outlet hose 13 and the temporary oil truck return hose 14, respectively. Figure 2 As shown.

[0029] Preferably, the diameter of the temporary outlet hose 13 of the oil truck is greater than or equal to the diameter of the main inlet pipe 1, and the diameter of the temporary return hose 14 of the oil truck is greater than or equal to the diameter of the main return pipe 2; the diameter of the first valved pipeline 10 is greater than or equal to the diameter of the annular main pipe 3, and the diameter of the second valved pipeline 11 is greater than or equal to the diameter of the annular main pipe 3; the diameter of the temporary valved pipeline 12 is greater than or equal to the diameter of the hydraulic cylinder pipeline (inlet pipe 4 and outlet pipe 6). The pipe diameter settings ensure that the flow rate during oil injection and cleaning reaches the flow rate during the use of the hydraulic pipeline system, improving the oil injection effect. In this embodiment, the pipe diameter refers to the inner diameter. Additionally, the connected pipelines must withstand the maximum oil injection pressure during oil injection, and the connected pipelines must be cleaned before oil injection. In this embodiment, the pipes in the first valved pipeline, the second valved pipeline, and the temporary valved pipeline are all flexible hoses.

[0030] When performing oil flushing of the ring main:

[0031] Close all temporary valved pipelines 12 (temporary valved pipelines are pipelines with valves), open the first valved pipeline and the second valved pipeline (both the first and second valved pipelines are pipelines with valves), and the oil injection vehicle 8, the main oil inlet pipe 1, the branch oil main pipe 301 on one side, the first valved pipeline 10, the main oil collection pipe 302, the second valved pipeline 11, the branch oil main pipe 301 on the other side, the return oil main pipe 2, and the oil injection vehicle 8 form the first circulation oil injection pipeline, as follows. Figure 3 As shown.

[0032] When performing oil flushing of hydraulic cylinder lines:

[0033] Close the first valved pipeline 10 and the temporary valved pipeline 12 near the second valved pipeline 11, and open the second valved pipeline 11 and the temporary valved pipeline 12 near the first valved pipeline 10. The oil injection vehicle 8, the main inlet pipeline 1, the branch pipeline 301 near the first valved pipeline 10, the temporary branch pipeline near the first valved pipeline 10, the main collection pipeline 302, the second valved pipeline 11, the branch pipeline 301 near the second valved pipeline 11, the return pipeline 2, and the oil injection vehicle 8 form a second circulation oil injection pipeline. Figure 4 As shown;

[0034] Close the second valved pipeline 11 and the temporary valved pipeline 12 near the first valved pipeline 10, and open the first valved pipeline 10 and the temporary valved pipeline 12 near the second valved pipeline 11. The oil injection vehicle 8, the main inlet pipeline 1, the main distribution pipeline 301 near the first valved pipeline 10, the first valved pipeline 10, the main collection pipeline 302, the temporary branch pipeline near the second valved pipeline 11, the main distribution pipeline 301 near the second valved pipeline 11, the return pipeline 2, and the oil injection vehicle 8 form a third circulation oil injection pipeline. Figure 5 As shown;

[0035] The second and third circulation oil injection lines are injected with oil separately. The second circulation oil injection line can be cleaned first, followed by the third circulation oil injection line, or vice versa.

[0036] After the hydraulic cylinder pipeline is cleaned with oil, the sludge, rust, and other impurities removed from the pipeline will enter the annular main pipe. Therefore, the first cycle of oil injection needs to be repeated until the filter paper on the oil injection vehicle is clean. The oil injection vehicle is equipped with a filter, and the filter paper is installed inside the filter. When the oil flows back through the filter paper, the particulate matter is filtered out. If the cleaning effect is good, there will be no obvious particulate matter on the filter paper, which meets the requirements.

[0037] After the oil injection is completed, remove the temporary pipeline, the first valved pipeline, the second valved pipeline, the temporary valved pipeline, and the plugs at the first and third interfaces. Reconnect the first and second interfaces, reconnect the third and fourth interfaces, and reconnect the main oil distribution pipe and the main oil collection pipe.

[0038] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. Those skilled in the art can make non-inventive modifications to this embodiment as needed after reading this specification, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for oil injection into multiple parallel branch pipes in a hydraulic pipeline system, wherein the hydraulic pipeline system includes an inlet main pipe, a return main pipe, and an annular main pipe, the annular main pipe including a branch main pipe and a collection main pipe, the branch main pipe and the collection main pipe being connected in series to form the annular main pipe; the inlet main pipe is connected to the branch main pipe, the return main pipe is connected to the collection main pipe; a plurality of hydraulic cylinder pipelines are connected between the branch main pipe and the collection main pipe, the hydraulic cylinder pipeline including an inlet pipe, a hydraulic cylinder, and a return pipe connected in sequence, the inlet pipe being connected to the branch main pipe, and the return pipe being connected to the collection main pipe; during oil injection, the annular main pipe is first cleaned by oil injection using an oil injection vehicle, then the hydraulic cylinder pipelines are cleaned by oil injection using an oil injection vehicle, and finally the annular main pipe is cleaned by oil injection again; Before oil injection and cleaning, disconnect the main oil distribution pipe near the main oil inlet pipe to form a first and second interface; disconnect the connection between the main return oil pipe and the main collection oil pipe to form a third and fourth interface; disconnect the connection between the main oil distribution pipe and the main collection oil pipe to form a first and second access end; disconnect the hydraulic cylinder from the inlet and outlet oil pipes; connect the oil injection vehicle before oil injection; seal the first and third interfaces; connect the second and fourth interfaces with temporary pipelines; install a first valved pipeline and a second valved pipeline at the first and second access ends, respectively. Piping; a temporary valved pipeline is installed between the inlet and outlet pipelines, forming a temporary branch pipeline with the inlet pipeline, the temporary valved pipeline, and the outlet pipeline; the main inlet pipeline and the main return pipeline are connected to the oil injection vehicle. When performing ring-shaped main pipeline oil injection cleaning, all temporary valved pipelines are closed, and the first and second valved pipelines are opened. The oil injection vehicle, the main inlet pipeline, the branch main pipeline on one side, the first valved pipeline, the main collection pipeline, the second valved pipeline, the branch main pipeline on the other side, the main return pipeline, and the oil injection vehicle form the first circulation oil injection pipeline. When performing oil injection cleaning of the hydraulic cylinder pipeline: Close the first valved pipeline and the temporary valved pipeline on the side near the second valved pipeline, open the second valved pipeline and the temporary valved pipeline on the side near the first valved pipeline, and the oil injection truck, the main oil inlet pipeline, the main oil distribution pipeline on the side near the first valved pipeline, the temporary branch pipeline on the side near the first valved pipeline, the main oil collection pipeline, the second valved pipeline, the main oil distribution pipeline on the side near the second valved pipeline, the main oil return pipeline, and the oil injection truck form the second circulation oil injection pipeline; Close the second valved pipeline and the temporary valved pipeline on the side near the first valved pipeline, open the first valved pipeline and the temporary valved pipeline on the side near the second valved pipeline, and the oil injection truck, the main oil inlet pipeline, the main oil distribution pipeline on the side near the first valved pipeline, the first valved pipeline, the main oil collection pipeline, the temporary branch pipeline on the side near the second valved pipeline, the main oil distribution pipeline on the side near the second valved pipeline, the main oil return pipeline, and the oil injection truck form the third circulation oil injection pipeline; The second and third circulation oil injection pipelines are injected with oil separately. After the oil injection is completed, the temporary pipeline, the first valved pipeline, the second valved pipeline, the temporary valved pipeline, and the plugs at the first and third interfaces are removed. The first and second interfaces are reconnected, the third and fourth interfaces are reconnected, and the main oil distribution pipeline and the main oil collection pipeline are reconnected.

2. The method for oil injection into multiple parallel branch pipes in a hydraulic pipeline system according to claim 1, characterized in that, A temporary outlet hose is connected between the oil injection truck and the main oil inlet pipe, and a temporary return hose is connected between the oil injection truck and the main return pipe. A shut-off valve is installed on the temporary outlet hose and the temporary return hose, respectively.

3. The method for oil injection into multiple parallel branch pipes in a hydraulic pipeline system according to claim 2, characterized in that, The diameter of the temporary outlet hose of the oil tanker is greater than or equal to the diameter of the main inlet hose, and the diameter of the temporary return hose of the oil tanker is greater than or equal to the diameter of the main return hose.

4. The method for oil injection into multiple parallel branch pipes in a hydraulic pipeline system according to claim 1, characterized in that, The diameter of the first valved pipeline is greater than or equal to the diameter of the annular main pipe; the diameter of the second valved pipeline is greater than or equal to the diameter of the annular main pipe; and the diameter of the temporary valved pipeline is greater than or equal to the diameter of the hydraulic cylinder pipeline.

Images