Ship oil supply monitoring pump stopping system

Abstract

The utility model discloses a ship oil supply monitoring pump stopping system, and belongs to the technical field of ship pump stopping. The ship oil supply monitoring and pump stopping system comprises a pressure sensor, an oil spilling alarm extension set, a microcontroller, an overpressure alarm circuit, an overpressure pump stopping circuit and an oil spilling alarm pump stopping circuit, the pressure sensor is arranged on an output pipeline of a cargo oil pump, and the oil spilling alarm extension set is arranged in an oil receiving groove; the pressure sensor is electrically connected with the microcontroller, and the microcontroller is connected with the overpressure alarm circuit and the overpressure pump stopping circuit in parallel. The oil spill alarm extension set is in communication connection with the oil spill alarm pump stopping circuit, the oil spill alarm pump stopping circuit is connected to the overpressure pump stopping circuit in parallel, and a selective switch is arranged between the oil spill alarm pump stopping circuit and the overpressure pump stopping circuit. The pipeline pressure of an oil supply ship in the fuel conveying process and the oil spilling state of an oil receiving ship can be monitored, and starting and stopping of a cargo oil pump are achieved; the problem of fuel oil leakage caused by neglect of oil spill monitoring in existing ship monitoring is solved.

Description

Technical Field

[0001] This utility model relates to the field of ship pump shutdown technology, and in particular to a ship fuel supply monitoring and pump shutdown system. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] A receiving vessel is a ship that receives fuel oil or other liquid supplies at sea or in port. It extends its voyage or ensures continuous operation by receiving fuel oil or other liquid supplies from other vessels (such as oil supply vessels). During the process of an oil supply vessel refueling a receiving vessel, fuel is delivered to the receiving vessel via a fuel supply hose. If phenomena such as excessively rapid fuel supply, valve malfunction, or pipeline blockage occur during this process, leading to a momentary increase in fuel supply pressure, there is a risk of fuel supply hose rupture, excessively high tank levels, and oil spillage.

[0004] Currently, most oil supply vessels focus on starting and stopping the cargo oil pump power source through pressure-electric control circuits. When the pressure in the oil supply pipeline exceeds a certain limit, the power source of the cargo oil pump is cut off to reduce the risk of oil spills caused by oil supply pipeline rupture. However, they neglect to monitor oil spills caused by excessively high oil tank levels on receiving vessels. When the oil tank level is too high, fuel overflows from the vent to the receiving tank. If the power source of the cargo oil pump on the oil supply vessel is not cut off, it will cause a large amount of fuel leakage and pollute the marine environment.

[0005] Furthermore, the PLC control system on existing oil tankers, which is used to start and stop the cargo oil pumps, is a closed design, making it very difficult to modify it to achieve pressure monitoring and oil spill monitoring. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model embodiment is to provide a ship fuel supply monitoring and pump shutdown system that performs comprehensive monitoring during fuel delivery and uses circuitry to start and stop the cargo oil pump, thereby reducing the risk of oil spills and preventing pollution to the marine environment.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A ship fuel supply monitoring and pump shutdown system includes a pressure sensor, an oil spill alarm unit, a microcontroller, an overpressure alarm circuit, an overpressure pump shutdown circuit, and an oil spill alarm pump shutdown circuit. The pressure sensor is installed in the output pipeline of the cargo oil pump, and the oil spill alarm unit is installed in the oil receiving tank.

[0009] The pressure sensor is electrically connected to the microcontroller, and the microcontroller is connected in parallel with the overpressure alarm circuit and the overpressure pump stop circuit respectively; the oil spill alarm unit is communicatively connected to the oil spill alarm pump stop circuit, the oil spill alarm pump stop circuit is connected in parallel with the overpressure pump stop circuit, and a selection switch is provided between the oil spill alarm pump stop circuit and the overpressure pump stop circuit;

[0010] The oil spill alarm and pump stop circuit includes an oil spill alarm host and a relay. The relay includes a first coil, a first normally open contact, and a second normally open contact. The oil spill alarm host is electrically connected to the first coil. The first normally open contact is connected in parallel to the overpressure alarm circuit, and the second normally open contact is connected in parallel to the overpressure pump stop circuit.

[0011] By adopting the above technical solution, pressure sensors are used to monitor pipeline pressure, and overpressure alarm circuits and overpressure pump stop circuits are used to alarm and stop the pump when the pressure exceeds the limit. An oil spill alarm unit is used to monitor the liquid level in the oil tank, and an oil spill alarm pump stop circuit is used to alarm and stop the pump when an oil spill occurs, thus achieving comprehensive monitoring of the fuel transportation process and reducing the risk of oil spill. At the same time, the connection and disconnection of the oil spill alarm pump stop circuit are controlled by a selector switch to avoid the impact of its failure on the operation of the cargo oil pump.

[0012] In some embodiments, the overpressure alarm circuit includes a high-pressure alarm switch and a buzzer;

[0013] The microcontroller is electrically connected to the high-voltage alarm switch, the high-voltage alarm switch is electrically connected to the buzzer, and the first normally open contact is connected in parallel to the high-voltage alarm switch.

[0014] By adopting the above technical solution, a buzzer alarm is triggered when the pipeline pressure is high or an oil spill occurs, attracting the attention of the operators.

[0015] In some embodiments, the overpressure pump stop circuit includes a pump stop auxiliary switch and an intermediate relay, the intermediate relay including a second coil and a third normally open contact, a fourth normally open contact and a fifth normally open contact;

[0016] The microcontroller is electrically connected to the pump stop auxiliary switch, the pump stop auxiliary switch is electrically connected to the coil of the intermediate relay, the third normally open contact and the second normally open contact are connected in parallel to the pump stop auxiliary switch, and the fourth normally open contact and the fifth normally open contact are connected in parallel to the emergency stop switch.

[0017] By adopting the above technical solution, the switching on and off of the control circuit of the switch and relay is used to control the stopping of the cargo oil pump, which has a fast response speed and strong stability.

[0018] In some embodiments, a reset switch is provided between the second coil and the pump stop auxiliary switch.

[0019] By adopting the above technical solution, the cargo oil pump can be restarted by pressing the reset switch to de-energize the intermediate relay.

[0020] In some implementations, an emergency pump stop indicator light is also included, which is electrically connected to the reset switch.

[0021] By adopting the above technical solution, visual instructions are provided to the operators. When the emergency stop pump indicator light is on, attention should be paid to the fuel delivery status. When the emergency stop pump indicator light goes out, the cargo oil pump can be restarted.

[0022] In some embodiments, the oil spill alarm unit includes an oil spill sensor and a wireless switch controller unit; the oil spill sensor is electrically connected to the wireless switch controller unit, and the wireless switch controller unit is communicatively connected to the oil spill alarm host unit.

[0023] By adopting the above technical solution, it is ensured that the oil overflow sensor will stably transmit the alarm signal to the oil overflow alarm pump stop circuit when oil overflow occurs in the oil receiving tank.

[0024] In some implementations, the oil spill alarm unit also includes an emergency stop button connected in parallel with the oil spill sensor.

[0025] By adopting the above technical solution, in case of an emergency, the operator can press the emergency stop button to send an alarm signal to the oil spill alarm pump stop circuit.

[0026] In some implementations, the number of the oil spill alarm sub-units is equal to the number of oil receiving tanks, and the number of the pressure sensors, the overpressure pump stop circuit, and the microcontroller is equal to the number of cargo oil pumps.

[0027] By adopting the above technical solution, it is convenient to monitor the oil receiving tanks corresponding to all vent holes, and it is convenient to control all cargo oil pumps.

[0028] In some implementations, the selection switch is a rotary switch.

[0029] By adopting the above technical solution, it is easier for operators to carry out the work.

[0030] In some embodiments, the oil spill alarm host is a wireless switch controller LA101, the oil spill sensor is a float sensor, and the microcontroller is model MXCL-A-805-Z.

[0031] By adopting the above technical solution, oil spill monitoring and electrical signal transmission can be performed using the existing functions of existing sensors, wireless switch controllers, and microcontrollers, which is simple and convenient.

[0032] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:

[0033] 1. The technical solution provided by this utility model monitors the delivery pressure of the cargo oil pump through a pressure sensor and monitors the liquid level of the oil tank through an oil overflow sensor, thereby achieving comprehensive monitoring of the entire fuel delivery process and facilitating timely detection of abnormalities.

[0034] 2. The technical solution provided by this utility model can issue a timely warning through the alarm circuit when the cargo oil pump is under high pressure, cut off the operation of the cargo oil pump through the pump stop circuit when the cargo oil pump is under ultra-high pressure, issue an alarm through the oil spill alarm pump stop circuit and automatically stop the pump in time when oil spill occurs. In an emergency, the operator can press the emergency stop button of the oil spill alarm unit to realize automatic remote pump stop, reduce the risk of oil spill caused by pipeline rupture or excessive fuel delivery to the tank, and protect the marine environment.

[0035] 3. The technical solution provided by this utility model can cut off the oil overflow alarm and pump stop circuit by means of a selector switch when components such as the oil overflow sensor and the oil overflow alarm and pump stop circuit fail, thus avoiding affecting the normal operation of the cargo oil pump.

[0036] 4. The technical solution provided by this utility model achieves pump shutdown by designing an overpressure alarm circuit, an overpressure pump stop circuit, and an oil spill alarm pump stop circuit. It does not require modification to the ship's original control system. The pump can be automatically stopped simply by connecting the normally open contact of the intermediate relay in parallel to the existing emergency stop switch. The modification is simple and can be applied to most existing ships, thus reducing costs. Attached Figure Description

[0037] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0038] Figure 1 This is a schematic diagram of the architecture of the ship fuel supply monitoring and pump shutdown system provided in Embodiment 1 of this utility model;

[0039] Figure 2 This is a circuit diagram of the ship fuel supply monitoring and pump shutdown system provided in Embodiment 1 of this utility model;

[0040] Figure 3 This is a schematic diagram of the architecture of the ship fuel supply monitoring and pump shutdown system provided in Embodiment 2 of this utility model;

[0041] Figure 4 This is a circuit diagram of the ship fuel supply monitoring and pump shutdown system provided in Embodiment 2 of this utility model.

[0042] The distances or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only. Detailed Implementation

[0043] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0044] Terminology Explanation:

[0045] Oil receiving tank: Used to collect fuel oil that may leak during the oil receiving process and prevent it from flowing into the deck drain hole or sea area. It is located below the vent of the receiving vessel.

[0046] Example 1

[0047] As described in the background section, existing oil supply vessels do not comprehensively monitor fuel delivery, making it difficult to stop the pumps in time when there is a risk of oil spill on the receiving vessel. To solve the above technical problems, this utility model proposes a ship fuel supply monitoring and pump shutdown system that combines an overpressure alarm circuit, an overpressure pump shutdown circuit, and an oil spill alarm and pump shutdown circuit. The system alarms when the output pressure of the cargo oil pump exceeds the pressure limit and shuts down the cargo oil pump when the output pressure of the cargo oil pump exceeds the pressure limit or when there is oil spillage in the receiving tank.

[0048] Combination Figures 1-2 The ship's fuel supply monitoring and pump shutdown system includes a pressure sensor, an oil spill alarm unit, a microcontroller, an overpressure alarm circuit, an overpressure pump shutdown circuit, and an oil spill alarm and pump shutdown circuit. The oil spill alarm unit includes an oil spill sensor and a wireless switch controller unit. The pressure sensor is installed on the output pipeline of the cargo oil pump on the fuel supply vessel to collect the output pressure of the cargo oil pump. The pressure sensor is electrically connected to the microcontroller, which is connected in parallel with both the overpressure alarm circuit and the overpressure pump shutdown circuit. The oil spill sensor is installed in the receiving tank of the receiving vessel and is triggered to issue an alarm signal when an oil spill occurs. The oil spill sensor is electrically connected to the wireless switch controller unit, which is communicatively connected to the oil spill alarm and pump shutdown circuit.

[0049] like Figure 2As shown, the overpressure alarm circuit further includes a high-pressure alarm switch and a buzzer; the overpressure pump stop circuit includes a pump stop auxiliary switch and an intermediate relay KA1; the intermediate relay KA1 includes a second coil, a third normally open contact, a fourth normally open contact and a fifth normally open contact; the oil overflow alarm pump stop circuit includes an oil overflow alarm host and a relay KA3; the relay KA3 includes a first coil, a first normally open contact and a second normally open contact.

[0050] The pressure sensor is electrically connected to the microcontroller. Terminal 1 of the microcontroller is electrically connected to terminal 3 of the high-pressure alarm switch. Terminal 4 of the high-pressure alarm switch is electrically connected to terminal 5 of the buzzer. Terminal 3 of the high-pressure alarm switch is electrically connected to terminal L of the power supply. Terminal 6 of the buzzer is electrically connected to terminal N of the power supply. Terminal 1 of the microcontroller is electrically connected to terminal 9 of the pump stop auxiliary switch. Terminal 10 of the pump stop auxiliary switch is connected to a reset switch. Terminal 12 of the reset switch is connected to terminal 13 of the second coil. Terminal 3 of the pump stop auxiliary switch is electrically connected to terminal L of the power supply. Terminal 14 of the second coil is electrically connected to terminal N of the power supply. A third normally open contact is connected in parallel to the pump stop auxiliary switch. A fourth and fifth normally open contact are connected in parallel to the emergency stop switch. The emergency stop switch is a component of the original control system of the cargo oil pump. The emergency stop switch is electrically connected to the ship's built-in PLC controller, and the PLC controller is electrically connected to the cargo oil pump.

[0051] The first terminal 9 of the pump stop auxiliary switch is electrically connected to the first terminal 19 of the selector switch. The second terminal 20 of the selector switch is electrically connected to the first terminal 23 of the oil overflow alarm host. The second terminal 24 of the oil overflow alarm host is electrically connected to the first terminal 25 of the coil. The second terminal 26 of the coil is electrically connected to the third terminal 22 of the selector switch. The fourth terminal 21 of the selector switch is electrically connected to the second terminal 21 of the second coil. The first terminal of the oil overflow alarm host is electrically connected to a switching power supply, and the switching power supply is electrically connected to the first coil.

[0052] The operating mode of the ship fuel supply monitoring and pump shutdown system described in this embodiment is as follows:

[0053] In the initial state, the alarm auxiliary switch, high voltage alarm switch, and emergency stop switch are normally open contacts.

[0054] The pressure sensor collects the pressure signal from the output pipeline of the cargo oil pump and transmits it to the microcontroller. The microcontroller receives the pressure signal, and when the pressure signal reaches the alarm pressure threshold, the microcontroller sends an alarm electrical signal to the alarm auxiliary switch. The alarm auxiliary switch closes, and the power supply, alarm auxiliary switch, and buzzer form a closed loop, causing the buzzer to sound to remind the operator to check the oil delivery status in time. When the pressure signal reaches the pump stop pressure threshold, the microcontroller sends a pump stop electrical signal to the pump stop auxiliary switch, and the pump stop auxiliary switch closes. The power supply, pump stop auxiliary switch, reset switch, and coil form a closed loop, energizing the second coil. The fourth and fifth normally open contacts of the intermediate relay close, transmitting the pump stop electrical signal to the PLC controller. The PLC controller receives the pump stop electrical signal and controls the cargo oil pump to stop.

[0055] Here, the closure of the third normally open contact ensures that the intermediate relay is always energized, keeping the pump in a closed state and preventing the oil pump from running before the fault is properly resolved.

[0056] The cargo oil pump control system of the oil supply vessel is a SIEMENS CPU 313C of the SIMATIC S7-300 series. This is the original factory setting of the oil supply vessel. The technical solution described in this embodiment does not make any improvements to it. According to its technical manual, those skilled in the art can clearly understand the principle of stopping the cargo oil pump, so it will not be described in detail here.

[0057] When oil overflows into the oil receiving tank, the float of the oil overflow sensor actuates, causing the contacts inside the sensor to close and sending an alarm signal to the wireless switch controller. The wireless switch controller then transmits the signal to the oil overflow alarm host, which closes, energizes the coil, closes the first normally open contact, and triggers an alarm. Simultaneously, the second normally open contact closes, energizing the second coil, which in turn closes the fourth and fifth normally open contacts. These closures transmit a pump stop signal to the PLC controller, which receives the signal and controls the cargo oil pump to stop.

[0058] Here, the number of oil spill sensors is the same as the number of oil collection tanks.

[0059] When it is necessary to restart the cargo oil pump, press the reset switch to restart the pump.

[0060] When the oil overflow alarm pump stop circuit or oil overflow sensor is damaged or malfunctions, the selector switch can be turned off to disconnect the oil overflow alarm pump stop circuit, so as to avoid false alarms affecting the operation of the cargo oil pump.

[0061] In this embodiment, the high-pressure alarm switch and the pump stop auxiliary switch can be AL6-A self-locking switches, which close when energized; the selector switch can be a rotary switch, which opens when rotated to the off position; the pressure sensor can be a common pressure sensor in the prior art, such as YYFM2188; the oil overflow sensor is a float sensor, which can be model YS4510 1A1; the microcontroller can be an MXCL-A-805-Z smart pressure gauge, which can output a voltage signal according to the setting, which is the existing function of the MXCL-A-805-Z smart pressure gauge; the wireless switch controller sub-unit can be a wireless switch controller LB101, and the oil overflow alarm host can be a wireless switch controller LA101. The wireless switch controller LA101 can be matched with 50 wireless switch controllers LB101.

[0062] The model of the above-mentioned components can be selected according to the actual situation. This embodiment has not made any improvements to them, and will not be described in detail here. According to the chip or device manual, those skilled in the art can clearly know their connection relationship.

[0063] In addition, the MXCL-A-805-Z smart pressure gauge has a display screen that can show the pressure values ​​collected by the pressure sensor.

[0064] Furthermore, in order to provide operators with intuitive reminders in abnormal conditions, an emergency status indicator light is also included. The emergency status indicator light is electrically connected to the reset switch; when the pressure exceeds the pump stop pressure threshold, the emergency status indicator light will remain on.

[0065] Example 2

[0066] Combination Figure 3 - Figure 4. The difference between this embodiment and Embodiment 1 is that the ship fuel supply monitoring and pump shutdown system described in this embodiment is applied to fuel supply ships using twin screw pumps. The cargo fuel pump includes a left pump and a right pump. Correspondingly, the number of pressure sensors is 2, which are installed on the output pipelines of the left pump and the right pump, respectively. The number of microcontrollers, high pressure alarm switches, and overpressure pump shutdown circuits are all 2, and the buzzer is shared by both pumps.

[0067] like Figure 4As shown, the ship's fuel supply monitoring and pump shutdown system includes a first microcontroller, a second microcontroller, an overpressure alarm circuit, a first overpressure pump shutdown circuit, a second overpressure pump shutdown circuit, and an oil spill alarm pump shutdown circuit. The overpressure alarm circuit includes a first high-pressure alarm switch, a second high-pressure alarm switch, and a buzzer. The first overpressure pump shutdown circuit includes a first pump shutdown auxiliary switch and a first intermediate relay. The second overpressure pump shutdown circuit includes a second pump shutdown auxiliary switch and a second intermediate relay. The oil spill alarm pump shutdown circuit includes an oil spill alarm host and a relay. The relay includes a coil, a first normally open contact, and two second normally open contacts.

[0068] The first pressure sensor is electrically connected to the first microcontroller. The first microcontroller is electrically connected to the first terminal 3 of the first high-pressure alarm switch. The second terminal 4 of the first high-pressure alarm switch is electrically connected to the first terminal 5 of the buzzer. The first terminal 3 of the first high-pressure alarm switch is electrically connected to the first terminal L of the power supply. The second terminal 6 of the buzzer is electrically connected to the second terminal N of the power supply. The second microcontroller is electrically connected to the first terminal 8 of the second high-pressure alarm switch. The second terminal 9 of the second high-pressure alarm switch is electrically connected to the first terminal 5 of the buzzer. The first terminal of the first microcontroller is electrically connected to the first terminal 9 of the first pump stop auxiliary switch. The second terminal 10 of the first pump stop auxiliary switch is electrically connected to a normally closed contact of a reset switch. This normally closed contact is connected to the coil of the first intermediate relay. The first terminal 9 of the first pump stop auxiliary switch is electrically connected to the first terminal L of the power supply. The coil of the first intermediate relay is electrically connected to the second terminal N of the power supply. One normally open contact of the first intermediate relay is connected in parallel to the first pump stop auxiliary switch. The other two normally open contacts of the first intermediate relay are connected in parallel to the emergency stop switch of the left pump. The emergency stop switch is electrically connected to the PLC controller. The PLC controller is electrically connected to the left pump.

[0069] The first terminal of the second microcontroller is electrically connected to the first terminal 37 of the second pump stop auxiliary switch. The second terminal 38 of the second pump stop auxiliary switch is electrically connected to another normally closed contact of the reset switch. This normally closed contact is connected to the coil of the second intermediate relay. The first terminal 37 of the second pump stop auxiliary switch is electrically connected to the first terminal L of the power supply. The coil of the second intermediate relay is electrically connected to the second terminal N of the power supply. One normally open contact of the second intermediate relay is connected in parallel to the second pump stop auxiliary switch. The other two normally open contacts of the second intermediate relay are connected in parallel to the emergency stop switch of the right pump. The emergency stop switch is electrically connected to the PLC controller. The PLC controller is electrically connected to the right pump.

[0070] The second terminal 20 of the selector switch is electrically connected to the first terminal 23 of the oil spill alarm host. The second terminal 24 of the oil spill alarm host is electrically connected to the first terminal 25 of the coil. The second terminal 26 of the coil is electrically connected to the third terminal 22 of the selector switch. A first normally open contact is connected in parallel to the first high-pressure alarm switch, a second normally open contact is connected in parallel to the first pump stop auxiliary switch, and another second normally open contact is connected in parallel to the second pump stop auxiliary switch.

[0071] The operation of the ship fuel supply monitoring and pump shutdown system described in this embodiment is the same as that in Embodiment 1, and will not be repeated here. It should be noted that when oil overflows in any oil tank, the oil overflow alarm host closes, the coil is energized, and both second normally open contacts close simultaneously, enabling the left and right pumps to stop at the same time.

[0072] In this embodiment, both the reset switch and the selector switch are double switches.

[0073] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A ship fuel supply monitoring and pump shutdown system, characterized in that, It includes a pressure sensor, an oil spill alarm unit, a microcontroller, an overpressure alarm circuit, an overpressure pump stop circuit, and an oil spill alarm pump stop circuit. The pressure sensor is installed on the output pipeline of the cargo oil pump, and the oil spill alarm unit is installed in the oil receiving tank. The pressure sensor is electrically connected to the microcontroller, and the microcontroller is connected in parallel with the overpressure alarm circuit and the overpressure pump stop circuit respectively; the oil spill alarm unit is communicatively connected to the oil spill alarm pump stop circuit, the oil spill alarm pump stop circuit is connected in parallel with the overpressure pump stop circuit, and a selection switch is provided between the oil spill alarm pump stop circuit and the overpressure pump stop circuit; The oil spill alarm and pump stop circuit includes an oil spill alarm host and a relay. The relay includes a first coil, a first normally open contact, and a second normally open contact. The oil spill alarm host is electrically connected to the first coil. The first normally open contact is connected in parallel to the overpressure alarm circuit, and the second normally open contact is connected in parallel to the overpressure pump stop circuit.

2. The ship fuel supply monitoring and pump shutdown system as described in claim 1, characterized in that, The overpressure alarm circuit includes a high-pressure alarm switch and a buzzer; The microcontroller is electrically connected to the high-voltage alarm switch, the high-voltage alarm switch is electrically connected to the buzzer, and the first normally open contact is connected in parallel to the high-voltage alarm switch.

3. The ship fuel supply monitoring and pump shutdown system as described in claim 1, characterized in that, The overpressure pump stop circuit includes a pump stop auxiliary switch and an intermediate relay. The intermediate relay includes a second coil and a third normally open contact, a fourth normally open contact, and a fifth normally open contact. The microcontroller is electrically connected to the pump stop auxiliary switch, the pump stop auxiliary switch is electrically connected to the second coil, the third normally open contact and the second normally open contact are connected in parallel to the pump stop auxiliary switch, and the fourth normally open contact and the fifth normally open contact are connected in parallel to the emergency stop switch.

4. The ship fuel supply monitoring and pump shutdown system as described in claim 3, characterized in that, A reset switch is provided between the second coil and the pump stop auxiliary switch.

5. The ship fuel supply monitoring and pump shutdown system as described in claim 4, characterized in that, It also includes an emergency pump stop indicator light, which is electrically connected to the reset switch.

6. The ship fuel supply monitoring and pump shutdown system as described in claim 1, characterized in that, The oil spill alarm unit includes an oil spill sensor and a wireless switch controller unit. The oil spill sensor is electrically connected to the wireless switch controller unit, and the wireless switch controller unit is communicatively connected to the oil spill alarm host unit.

7. The ship fuel supply monitoring and pump shutdown system as described in claim 6, characterized in that, The oil spill alarm unit also includes an emergency stop button, which is connected in parallel with the oil spill sensor.

8. The ship fuel supply monitoring and pump shutdown system as described in claim 1, characterized in that, The number of oil spill alarm sub-units is equal to the number of oil receiving tanks, and the number of pressure sensors, overpressure pump stop circuits, and microcontrollers is equal to the number of cargo oil pumps.

9. The ship fuel supply monitoring and pump shutdown system as described in claim 1, characterized in that, The selector switch is a rotary switch.

10. The ship fuel supply monitoring and pump shutdown system as described in claim 6, characterized in that, The oil spill alarm host is a wireless switch controller LA101, the oil spill sensor is a float sensor, and the microcontroller model is MXCL-A-805-Z.

Images