Multifunctional ship loading device auxiliary hydraulic system and ship comprising same

Abstract

The application provides a multifunctional ship loading equipment auxiliary hydraulic system and a ship comprising the same. The multifunctional ship loading equipment auxiliary hydraulic system comprises a first oil path connected between a main pump station and a sub-pump station, wherein the main pump station delivers pressurized hydraulic oil to the sub-pump station through the first oil path; the first oil path comprises a first check valve, a filter and a reversing valve arranged in sequence; a second pressure measuring and venting joint is arranged between the reversing valve and the sub-pump station, and the second pressure measuring and venting joint is used for connecting a pressure gauge or a venting device; a second oil path is connected between the sub-pump station and the main pump station, wherein the sub-pump station delivers the hydraulic oil pressurized again to the main pump station through the second oil path; the second oil path comprises a second check valve, a second stop valve, a reversing valve and a cooler arranged in sequence; and the passage direction of the reversing valve is opposite in the first oil path and the second oil path. The hydraulic debugging requirements of different shipborne equipment are met, different pressure and flow values are set according to the equipment, and the debugging and maintenance of the auxiliary shipborne equipment are facilitated.

Description

Technical Field

[0001] This invention belongs to the technical field of ship loading equipment, and particularly relates to a multifunctional auxiliary hydraulic system for ship loading equipment and a ship containing the same. Background Technology

[0002] Ship loading equipment often uses auxiliary hydraulic equipment during navigation and mooring to assist in hydraulic-related debugging and maintenance.

[0003] Existing auxiliary hydraulic equipment has a simple structure and limited functions, making it difficult to quickly set different pressure and flow values ​​according to the shipboard equipment, and inconvenient for debugging and maintaining the shipboard equipment. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a technical solution for a multifunctional auxiliary hydraulic system for ship loading equipment and a ship, thereby resolving the aforementioned technical issues.

[0005] The first aspect of this invention discloses a multifunctional auxiliary hydraulic system for ship loading equipment; the system includes: The first oil circuit connects the main pump station and the sub-pump station. The main pump station delivers pressurized hydraulic oil to the sub-pump station through the first oil circuit. The first oil circuit includes a first check valve, a filter, and a reversing valve arranged in sequence. A second pressure test and venting connector is provided between the reversing valve and the sub-pump station. The second pressure test and venting connector is used to connect a pressure gauge or a venting device. The second oil circuit connects the sub-pump station and the main pump station. The sub-pump station repressurizes the hydraulic oil and then delivers it to the main pump station through the second oil circuit. The second oil circuit includes a second check valve, a second shut-off valve, a reversing valve, and a cooler arranged in sequence. In the first and second oil circuits, the flow directions of the directional valves are opposite.

[0006] Optionally, the first oil circuit also includes a flow meter, which is located between the second pressure test and exhaust connector and the reversing valve.

[0007] Optionally, the first oil circuit also includes a first shut-off valve, which is located between the second pressure test and venting connector and the sub-pump station.

[0008] Optionally, the main pump station includes a main hydraulic pump, a four-way valve, and a main oil tank arranged in sequence. The first port of the four-way valve is connected to the main oil tank, and the second port of the four-way valve is connected to the main hydraulic pump. The main hydraulic pump draws oil from the main oil tank and supplies oil to the sub-pump station through the first oil circuit. The third port of the four-way valve is connected to the oil outlet of the cooler in the second oil circuit, and the fourth port of the four-way valve is connected to the main oil tank, so that the sub-pump station can repressurize the hydraulic oil and then deliver it to the main oil tank of the main pump station through the second oil circuit.

[0009] Optionally, a return oil filter is also installed between the second outlet of the four-way valve and the main oil tank.

[0010] Optionally, when pressurizing the oil-using terminal, the hydraulic pump of the sub-pump station draws oil from the ship's equipment oil tank and supplies oil to the four-way valve through the second oil circuit. The main pump station pressurizes the oil coming from the sub-pump station through the four-way valve, and then transports the oil through the first oil circuit and supplies pressure to the hydraulic system of the oil-using terminal downstream of the first shut-off valve.

[0011] Optionally, the auxiliary hydraulic system for the multi-functional ship loading equipment also includes a proportional relief valve connected between the outlet of the filter and the inlet of the cooler.

[0012] Optionally, the auxiliary hydraulic system for multi-functional ship loading equipment also includes a first pressure test and venting connector, which is connected between the filter and the reversing valve.

[0013] Optionally, a pressure gauge, a pressure relay, and a pressure sensor are connected to the first pressure testing and venting connector.

[0014] The second aspect of the present invention discloses a ship equipped with a multifunctional ship loading equipment auxiliary hydraulic system according to any one of the first aspects of the present invention.

[0015] As can be seen, the solution proposed in this invention allows the main pump station to supply oil and pressure to the branch pump station via a first oil circuit, and the branch pump station to supply oil to the main pump station via a second oil circuit. The first and second oil circuits can form a closed loop. The first oil circuit includes a filter and a second pressure testing and venting connector to achieve real-time filtration of the hydraulic oil and pressure testing and venting of the oil circuit system. The second oil circuit includes a cooler to cool the hydraulic oil. Therefore, the technical solution of this invention addresses the hydraulic commissioning needs of different shipboard equipment, providing auxiliary work for the commissioning and maintenance of shipboard equipment by setting different pressure and flow values ​​according to the equipment. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A diagram of an auxiliary hydraulic system for a multifunctional ship loading device according to an embodiment of the present invention; Figure 2 This diagram illustrates an auxiliary hydraulic system for a multi-functional ship loading device that includes only one sub-pump station, according to an embodiment of the present invention.

[0018] In the diagram: 1. Main oil tank; 2. Level switch relay; 3. Air filter; 4. Temperature sensor; 5. Level gauge; 6. Single-piece ball valve; 7. Heater; 8. Return oil filter; 9. Third two-piece ball valve; 10. Main hydraulic pump; 11. Main motor; 12. Filter; 13. First check valve; 14. Proportional relief valve; 15. Second pressure test and vent connector; 15.1. First pressure test and vent connector; 16. First hose; 17. First pressure gauge; 18. Pressure sensor; 19. Pressure relay; 20. First directional valve; 21.1. First shut-off valve; 21.2. Second shut-off valve; 22. Second hose; 24. Third hose; 25. Fourth hose; 26. Flow meter; 27.1. Fifth hose; 27.2. Sixth hose; 29.1. First reel; 29.2. Second reel; 30. Cooler; 31.1. First two-piece ball valve Ball valve; 31.2, Second two-piece ball valve; 32, First relief valve; 33, Temperature transmitter; 34, Four-way valve; 35, Third check valve; 36, Fourth check valve; 37, Second directional valve; 38, Fifth check valve; 39, Third directional valve; 40.1, Seventh hose; 40.2, Twelfth hose; 41.1, Eighth hose; 42.1, Sixth check valve; 43.1, Seventh check valve; 44.1, The... 44.2 Pressure transmitter; 45.1 First pressure test connector; 45.2 Second pressure test connector; 46.1 Ninth hose; 47.1 Motor; 48.1 Coupling; 49.1 Hydraulic pump; 50.1 Tenth hose; 51.1 Second check valve; 52.1 Second relief valve; 53.1 Eleventh hose; 54.1 Second pressure gauge; 55.1 Explosion-proof control cabinet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0021] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0022] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0023] This invention primarily addresses the interface requirements of different shipboard equipment. By installing various equipment connectors, different devices can be connected, ensuring the smooth commissioning and maintenance of shipboard equipment. It also addresses the hydraulic circuit requirements of different shipboard equipment, providing corresponding capability support for both open and closed-loop shipboard equipment. Multiple hydraulic terminals are installed according to the location of the shipboard equipment, and these terminals include return oil pumps, hoses, reels, and remote controllers.

[0024] See Figure 1 The first aspect of this invention discloses a multifunctional auxiliary hydraulic system for ship loading equipment, comprising: a main pump station and two branch pump stations respectively connected to the main pump station, each branch pump station corresponding to an oil consumption terminal. The connection relationship between the two branch pump stations and the main pump station is the same. Therefore, this embodiment only describes one branch pump station. Of course, in actual applications, two or more branch pump stations can be arranged, and their connection methods are all the same, so they will not be described in detail. The branch pump station is equipped with an explosion-proof control cabinet 55.1.

[0025] See Figure 2 The main pump station includes a main oil tank 1, a main hydraulic pump 10, and a main motor 11. The main motor 11 drives the main hydraulic pump 10 to draw oil from the main oil tank 1. The branch pump station includes a branch motor 47.1 and a branch hydraulic pump 49.1. The branch motor 47.1 drives the branch hydraulic pump 49.1 through a coupling 48.1. A single-piece ball valve 6 is installed at the bottom of the main oil tank 1 to drain the hydraulic oil in the tank. An air filter 3 is installed at the top of the main oil tank 1. The main oil tank 1 is also equipped with a level switch relay 2, a temperature sensor 4, a level gauge 5, and a heater 7. The level gauge 5 is connected to a check valve. In some embodiments, the main hydraulic pump 10 is a proportional variable pump.

[0026] A first oil circuit connects the main pump station and the branch pump station, through which the main pump station delivers pressurized hydraulic oil to the branch pump station. The first oil circuit includes a first check valve 13, a filter 12, and a first directional valve 20 arranged sequentially. A second pressure testing and venting connector 15 is provided between the first directional valve 20 and the branch pump station, for connecting a pressure gauge or venting device. A flow meter 26 is located between the second pressure testing and venting connector 15 and the first directional valve 20. A first shut-off valve 21.1 is located between the second pressure testing and venting connector 15 and the branch pump station.

[0027] Specifically, the main motor 11 drives the main hydraulic pump 10 to draw oil from and pressurize the main oil tank 1. The hydraulic oil in the main oil tank 1 enters the suction port of the sub-hydraulic pump 49.1 through the third two-piece ball valve 9, the second hose 22, the four-way valve 34, the main hydraulic pump 10, the first check valve 13, the filter 12, the first reversing valve 20, the flow meter 26, the first shut-off valve 21.1, the fifth hose 27.1, the first reel 29.1, the second reel 29.2, the seventh hose 40.1, and the ninth hose 46.1.

[0028] It should be noted that the first reel 29.1 and the second reel 29.2 have oil hoses wound around them.

[0029] A second oil circuit connects the branch pump station and the main pump station. The branch pump station repressurizes the hydraulic oil and then delivers it to the main pump station via the second oil circuit. The second oil circuit includes a second check valve 51.1, a second shut-off valve 21.2, a first directional valve 20, and a cooler 30, arranged sequentially. The outlet of the second check valve 51.1 is connected to a second relief valve 52.1, which is connected to a first pressure testing connector 45.1. The outlet of the second check valve 51.1 is also connected to a second pressure gauge 54.1. A second pressure testing connector 45.2 and an eleventh hose 53.1 are provided between the second pressure gauge 54.1 and the second check valve 51.1. The outlet of the second check valve 51.1 is also connected to a second pressure transmitter 44.2. The first pressure transmitter 44.1 is also connected to the second relief valve 52.1.

[0030] Specifically, the motor 47.1 drives the hydraulic pump 49.1 to start. The hydraulic oil, after being pressurized by the hydraulic pump 49.1, returns to the main oil tank 1 via the tenth hose 50.1, the second check valve 51.1, the twelfth hose 40.2, the sixth hose 27.2, the second shut-off valve 21.2, the first directional valve 20, the cooler 30, the four-way valve 34, and the return oil filter 8. The cooler 30 is connected in parallel to a first two-piece ball valve 31.1 and a second two-piece ball valve 31.2, with the other ends of both valves reserved. A temperature transmitter 33 is connected to the pipeline between the first directional valve 20 and the cooler 30. The pipeline between the return oil filter 8 and the four-way valve 34 is connected via another pipeline between the inlet of the cooler 30 and the first directional valve 20; this other pipeline is equipped with a first relief valve 32.

[0031] In the first and second oil circuits, the flow directions of the directional valves are opposite.

[0032] Furthermore, the main pump station includes, in sequence, a main hydraulic pump 10, a four-way valve 34, and a main oil tank 1. The first port of the four-way valve 34 is connected to the main oil tank 1, and the second port of the four-way valve 34 is connected to the main hydraulic pump 10. The main hydraulic pump 10 draws oil from the main oil tank 1 and supplies oil to the sub-pump station through the first oil circuit. The third port of the four-way valve 34 is connected to the oil outlet of the cooler 30 in the second oil circuit, and the fourth port of the four-way valve 34 is connected to the main oil tank 1, so that the sub-pump station can repressurize the hydraulic oil and then deliver it to the main oil tank 1 of the main pump station through the second oil circuit. A return oil filter 8 is also installed between the second outlet of the four-way valve 34 and the main oil tank 1. When pressure is supplied to the oil-using terminal, the hydraulic pump 49.1 of the sub-pump station draws oil from the ship's equipment oil tank and supplies oil to the four-way valve 34 through the second oil circuit. After the main pump station pressurizes the oil coming from the sub-pump station through the four-way valve 34, it transports the oil through the first oil circuit and supplies pressure to the hydraulic system of the oil-using terminal downstream of the first shut-off valve 21.1.

[0033] The shipborne equipment is the terminal equipment of this invention.

[0034] The auxiliary hydraulic system for the multi-functional ship loading equipment also includes a proportional relief valve 14, which is connected between the outlet of the filter 12 and the inlet of the cooler 30. The proportional relief valve 14 and the four-way valve 34 are connected by a fourth hose 25.

[0035] The auxiliary hydraulic system for multi-functional ship loading equipment also includes a first pressure venting connector 15.1, which is connected between the filter 12 and the first directional valve 20. A first pressure gauge 17, a pressure relay 19, and a pressure sensor 18 are connected to the first pressure venting connector 15.1. The first pressure venting connector 15.1 and the first pressure gauge 17 are connected via a pressure-measuring first hose 16.

[0036] The multifunctional auxiliary hydraulic system for ship loading equipment of the present invention includes at least an exhaust filter mode, a fluid replenishment mode, and a pressure supply mode, wherein: The exhaust filter mode is the self-circulation mode of the marine auxiliary hydraulic system. It is used for exhausting the hydraulic system, filtering and preheating the hydraulic oil, and checking the overall condition of the machine. This ensures the safety of the equipment and the cleanliness of the oil, thereby ensuring that the shipboard equipment is provided with safe and reliable oil and power.

[0037] This mode is used before each equipment docking with shipboard equipment, after long-term non-use, after hydraulic oil replacement, and after system fault handling. It can purge air from the pipelines, filter the pipelines and hydraulic oil in the hydraulic oil tank, and check the working status of each component.

[0038] The following explanation uses a single-line fuel system as an example to illustrate the working principle of the exhaust filtration mode: First, connect the outlets of the first reel 29.1 and the second reel 29.2. Select the operating terminal on the main pump station control box, then select the exhaust filtration mode and the location of the shipboard equipment for the oil outlet position. After confirming that all component switches and valves are correct, press the start button. The main hydraulic pump 10 (plunger pump) is driven by the main motor 11, drawing hydraulic oil from the main oil tank 1 and pressurizing it through the third two-piece ball valve 9, the second hose 22, and the four-way valve 34 (four-way ball valve). The pressurized hydraulic oil passes sequentially through the first check valve 13, filter 12, first directional valve 20 (the solenoid valve to the deck is currently in the neutral closed position), flow meter 26, first shut-off valve 21.1, fifth hose 27.1, first reel 29.1, second reel 29.2, seventh hose 40.1, and ninth hose 46.1, entering the suction port of the branch hydraulic pump 49.1 (return pump). The hydraulic pump 49.1 is driven by the motor 47.1. After being pressurized by the hydraulic pump 49.1, the hydraulic oil passes through the tenth hose 50.1, the second check valve 51.1, the twelfth hose 40.2, the sixth hose 27.2, the second shut-off valve 21.2, the first directional valve 20, the cooler 30, and the four-way valve 34 before returning to the oil tank of the oil source pump station.

[0039] To ensure the cleanliness of the system fluid and the normal condition of the equipment, the exhaust filtration mode must be activated before each use to filter the fluid and inspect the equipment at the terminal where the shipboard equipment is located.

[0040] In the replenishment mode, the marine auxiliary hydraulic system supplies hydraulic oil from its own hydraulic oil tank to the shipboard equipment's oil tank, replenishing the hydraulic oil for the shipboard equipment's hydraulic system. During this mode, the main hydraulic pump 10 draws oil from the main oil tank 1, while the branch hydraulic pump 49.1 remains inactive.

[0041] The following explanation uses a single oil circuit as an example to illustrate the working principle of the fluid replenishment mode: First, connect the outlet of the first reel 29.1 to the return port of the ship's equipment oil tank in the hangar. Select the operating terminal on the main pump station control box, then select the replenishment mode and the hangar as the oil outlet position. After confirming that all component switches and valves are correct, press the start button. The main hydraulic pump 10 is driven by the main motor 11, drawing and pressurizing hydraulic oil from the main oil tank 1 through the third two-piece ball valve 9, the second hose 22, and the four-way valve 34. The pressurized hydraulic oil then passes sequentially through the first check valve 13, the filter 12, the first directional valve 20 (the solenoid valve to the deck is currently in the neutral closed position), the flow meter 26, the first shut-off valve 21.1, the fifth hose 27.1, and the first reel 29.1 to the ship's equipment oil tank.

[0042] Pressure Supply Mode: First, connect the outlet of the first reel 29.1 to the pressure supply port of the shipboard equipment, and the second reel 29.2 to the oil tank suction port of the shipboard equipment. Select the operating terminal on the main pump station control box, then select the pressure supply mode and the oil outlet position on the operating terminal. After confirming that all component switches and valves are correct, press the start button. The branch hydraulic pump 49.1 is driven by the branch motor 47.1, drawing oil from the shipboard equipment oil tank and pressurizing it through the second reel 29.2, the seventh hose 40.1, and the ninth hose 46.1. The pressurized hydraulic oil then passes sequentially through the tenth hose 50.1, the second check valve 51.1, the twelfth hose 40.2, the sixth hose 27.2, the second shut-off valve 21.2, the first directional valve 20, the cooler 30, and the four-way valve 34 to the suction port of the main hydraulic pump 10. The main hydraulic pump 10 is driven by the main motor 11, drawing hydraulic oil supplied by the return pump and pressurizing it. The pressurized hydraulic oil is then supplied to the ship's equipment hydraulic system via the first check valve 13, filter 12, first directional valve 20, flow meter 26, first shut-off valve 21.1, fifth hose 27.1, and first reel 29.1. After being used by the ship's equipment hydraulic system, the high-pressure oil returns to the ship's equipment oil tank.

[0043] In pressurized mode, the entire system does not use the main oil tank 1 of the main pump station. Instead, it draws oil from the shipboard equipment oil tank through the branch hydraulic pump 49.1 and supplies it to the main pump station. The main pump station then pressurizes the oil and supplies it to the shipboard equipment hydraulic system. After the work is completed, the hydraulic oil returns to the shipboard equipment oil tank.

[0044] Specifically: the drain oil from the main hydraulic pump 10 flows through the second directional valve 37, the eighth hose 41.1, the sixth check valve 42.1, and the ninth hose 46.1 into the suction oil of the branch hydraulic pump 49.1. One end of the second directional valve 37 is connected to the main oil tank 1 via the fourth check valve 36 and the third hose 24. One end of the main hydraulic pump 10 is connected to the main oil tank 1 via the third check valve 35 and the third hose 24. One end of the second directional valve 37 is connected to another branch pump station via the fifth check valve 38. The inlet and outlet ends of the second directional valve 37 are connected in parallel to the third directional valve 39. The seventh check valve 43.1 and the sixth check valve 42.1 are connected in parallel with opposite directions of connection.

[0045] The second aspect of the present invention discloses a ship equipped with a multifunctional ship loading equipment auxiliary hydraulic system according to any one of the first aspects of the present invention.

[0046] In summary, the main pump station of this invention can supply oil and pressure to the branch pump station through the first oil circuit, and the branch pump station can supply oil to the main pump station through the second oil circuit. The first and second oil circuits can form a closed loop, and the first oil circuit includes a filter and a second pressure measurement and venting connector to achieve real-time filtration of hydraulic oil and pressure measurement and venting of the oil circuit system. The second oil circuit includes a cooler to cool the hydraulic oil. Therefore, the technical solution of this invention solves the hydraulic commissioning needs of different shipborne equipment, and simultaneously has a fluid replenishment mode, a pressure supply mode, and a venting and filtration mode. Different pressure and flow values ​​can be set according to the shipborne equipment to assist in the commissioning and maintenance of the shipborne equipment.

[0047] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

[0048] While this specification contains numerous specific implementation details, these should not be construed as limiting the scope of any invention or the scope of the claims, but rather are primarily intended to describe features of specific embodiments of a particular invention. Certain features described in the various embodiments herein may also be implemented in combination in a single embodiment. Conversely, various features described in a single embodiment may also be implemented separately in various embodiments or in any suitable sub-combination. Furthermore, while features may function in certain combinations as described above and even initially claimed in this way, one or more features from a claimed combination may be removed from that combination in some cases, and a claimed combination may refer to a sub-combination or a variation thereof.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multifunctional auxiliary hydraulic system for ship loading equipment, characterized in that, The system includes: A first oil circuit connects the main pump station and the sub-pump station. The main pump station delivers pressurized hydraulic oil to the sub-pump station through the first oil circuit. The first oil circuit includes a first check valve, a filter, and a reversing valve arranged in sequence. A second pressure test and venting connector is provided between the reversing valve and the sub-pump station. The second pressure test and venting connector is used to connect a pressure gauge or a venting device. A second oil circuit connects the sub-pump station and the main pump station. The sub-pump station repressurizes the hydraulic oil and then delivers it to the main pump station via the second oil circuit. The second oil circuit includes a second check valve, a second shut-off valve, the reversing valve, and a cooler arranged in sequence. In the first oil circuit and the second oil circuit, the passage directions of the reversing valve are opposite; The first oil circuit also includes a first shut-off valve, which is disposed between the second pressure test and exhaust connector and the sub-pump station; The main pump station includes a main hydraulic pump, a four-way valve, and a main oil tank arranged in sequence. In exhaust filtration mode, the first port of the four-way valve is connected to the main oil tank, the second port of the four-way valve is connected to the main hydraulic pump, the main hydraulic pump draws oil from the main oil tank and supplies oil to the sub-pump station through the first oil circuit, the third port of the four-way valve is connected to the oil outlet of the cooler in the second oil circuit, and the fourth port of the four-way valve is connected to the main oil tank, so that the sub-pump station can pressurize the hydraulic oil again and deliver it to the main oil tank of the main pump station through the second oil circuit; The exhaust filtration mode is the self-circulation mode of the auxiliary hydraulic system, and is used before each docking of shipboard equipment, when the system has not been used for a long time, after changing the hydraulic oil, and after system failure handling. When pressurizing the shipboard equipment, the main oil tank of the main pump station is not used. The hydraulic pump of the sub-pump station draws oil from the shipboard equipment oil tank and supplies oil to the four-way valve through the second oil circuit. The main pump station pressurizes the oil coming from the sub-pump station through the four-way valve and then transports the oil through the first oil circuit and pressurizes the hydraulic system of the shipboard equipment downstream of the first shut-off valve. After the work is completed, the hydraulic oil also returns to the shipboard equipment oil tank.

2. The auxiliary hydraulic system for multifunctional ship loading equipment according to claim 1, characterized in that, The first oil circuit also includes a flow meter, which is located between the second pressure testing and venting connector and the reversing valve.

3. The auxiliary hydraulic system for multifunctional ship loading equipment according to claim 1, characterized in that, The auxiliary hydraulic system for multi-functional ship loading equipment also includes a proportional relief valve, which is connected between the outlet end of the filter and the inlet end of the cooler.

4. The auxiliary hydraulic system for multifunctional ship loading equipment according to claim 1 or 2, characterized in that, The auxiliary hydraulic system for the multi-functional ship loading equipment also includes a first pressure test and venting connector, which is connected between the filter and the reversing valve.

5. The auxiliary hydraulic system for multifunctional ship loading equipment according to claim 4, characterized in that, The first pressure testing and exhaust connector is connected to a pressure gauge, a pressure relay, and a pressure sensor.

6. A ship, characterized in that, The ship is equipped with a multi-functional ship loading equipment auxiliary hydraulic system according to any one of claims 1 to 5.

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