An automatic oil supply pump
The automatic oil supply pump with integrated oil level and flow channel detection devices solves the problem of frequent refueling of generators, achieves stable and reliable automatic oil supply and equipment continuity, simplifies the structure and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING LIDONG TECHNOLOGY CO LTD
- Filing Date
- 2025-10-25
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, rapid fuel consumption in generator fuel tanks leads to frequent shutdowns for refueling, affecting work efficiency and operational continuity, and existing modification solutions are cumbersome and complex.
An automatic oil supply pump was designed, which integrates an oil level detection device and a flow channel detection device. The pump assembly is controlled by a microcontroller to start and stop. The design adopts a time-delay trigger module and a dual Hall sensor to achieve automated oil supply, which simplifies the structure and improves reliability.
It achieves a smooth and reliable automated oil supply process, reduces frequent start-stop cycles, simplifies wiring and structure, lowers costs, and improves the continuity of equipment operation.
Smart Images
Figure CN224579422U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of refueling equipment and relates to an automatic fuel supply pump. Background Technology
[0002] For fuel-powered equipment (such as generators), operation depends on a continuous fuel supply. These devices typically have a limited-capacity fuel tank (such as a generator fuel tank). To improve the equipment's range, existing technologies employ an additional, large-capacity, portable external fuel tank and a small fuel pump to extend its range. The operator must manually connect and start the fuel pump when the equipment's main fuel tank is nearly empty to pump fuel from the external tank into the main tank. The pump is manually shut off after the external tank is full or when the external tank is depleted.
[0003] However, during continuous operation, the fuel in the generator tank is consumed rapidly, requiring frequent shutdowns and manual refueling, which severely impacts work efficiency and operational continuity. To achieve automatic fuel supply, sensors need to be installed at various points, including the external auxiliary fuel tank, the generator fuel tank, and the fuel pipeline, to monitor the fuel supply status in real time. This also involves modifications to existing equipment, making the process extremely cumbersome. Utility Model Content
[0004] This invention addresses the shortcomings of existing technologies by providing an automatic oil supply pump, which has the advantages of high integration, compact structure, and reliable operation.
[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: An automatic oil supply pump includes a housing, within which a pump assembly for conveying oil is disposed. The housing has an inlet port connected to the oil supply port of an external auxiliary oil tank and an outlet port connected to the oil filling port of a generator oil tank. An outlet pipe communicating with the outlet port of the pump assembly is disposed within the outlet port. An oil level detection device is disposed within the outlet port, extending downwards and adapted to be inserted into the generator oil tank to detect the oil level. A flow channel detection device is connected to the inlet port of the pump assembly to detect the flow state of the oil. The flow channel detection device communicates with the inlet port of the pump assembly through an inlet chamber. A main controller is also disposed within the housing, and the pump assembly, oil level detection device, and flow channel detection device are electrically connected to the main controller.
[0006] In the aforementioned automatic oil supply pump, the main controller is a microcontroller unit (MCU), programmable logic controller (PLC), or integrated circuit with logic processing capabilities, which are conventional in the art, and the pump assembly is a motor-driven plunger pump, gear pump, etc.
[0007] In the aforementioned automatic fuel pump, the detection end of the fuel level detection device is located only at the high fuel level setting position of the generator fuel tank, and the main controller is equipped with a delay trigger module; furthermore, the delay trigger module can use a monostable trigger circuit composed of a 555 timer chip or other modules, and the delay time of the delay trigger module is set to 25 minutes to 35 minutes; the delay time is configured to be adapted to the fuel consumption rate of the equipment during operation.
[0008] In the aforementioned automatic oil supply pump, the oil level detection device includes a first Hall sensor and a second Hall sensor arranged side by side. The signal output terminals of the first Hall sensor and the second Hall sensor are electrically connected to two independent input terminals of the main controller, respectively. The first Hall sensor and the second Hall sensor can independently trigger the oil level signal. Other sensors for detecting liquid level in the art can also be used for the Hall sensor.
[0009] In the aforementioned automatic oil supply pump, the flow channel detection device is a Hall effect flow sensor; however, other sensors capable of detecting whether there is oil flow in the flow channel can also be used.
[0010] In the aforementioned automatic fuel pump, the housing is equipped with a work light, a fuel pressure light, and a malfunction light, which are electrically connected to the main controller.
[0011] In the aforementioned automatic oil supply pump, the oil outlet interface adopts a threaded interface or a snap-fit interface.
[0012] In the aforementioned automatic oil supply pump, the oil level detection device is coaxially arranged with the oil outlet interface, and the oil outlet pipe is arranged along one side of the axial direction of the oil level detection device.
[0013] In the aforementioned automatic fuel pump, a control panel is provided on the housing, and the working light, fuel pressure light, and malfunction light are all located on the control panel. The control panel is also provided with a power interface and a power switch.
[0014] Compared with the prior art, this utility model has the following advantages: 1. This utility model provides an automatic oil supply pump that integrates all the components required for automatic oil supply onto the main unit of the oil pump. It has a compact structure and is easy to install. By integrating the oil level detection device into the oil outlet and the flow channel detection device into the oil inlet, the functions of refueling, oil level detection, and flow channel detection are unified, which not only simplifies the external wiring but also improves the reliability of the system.
[0015] 2. This invention introduces an independent delay trigger module as a hardware structure. When the system detects that the oil level has deviated from the high oil level, it does not immediately start the oil pump. Instead, it waits a reasonable delay to confirm whether fuel consumption is continuous. This mechanism effectively filters out brief fluctuations in the oil level caused by equipment tilting or vibration, fundamentally preventing frequent start-stop of the oil pump and making the automation process more stable and reliable. Furthermore, this invention adopts a "detection device only at the high oil level" approach, eliminating the need for a low oil level sensor, simplifying the structure, and reducing costs and failure rates. The high oil level sensor uses a dual Hall effect sensor redundancy design, further improving the reliability of the automatic shutdown function. Attached Figure Description
[0016] Figure 1 This is a front view of Embodiment 1 of this utility model; Figure 2 This is a perspective view of Embodiment 1 of this utility model; Figure 3 yes Figure 1 A sectional view; Figure 4 This is a perspective view of Embodiment 2 of this utility model; Reference numerals: 1. Housing; 2. Pump assembly; 3. Oil inlet port; 4. Oil outlet port; 5. Oil outlet pipe; 6. Oil level detection device; 7. Flow channel detection device; 8. Oil inlet chamber; 9. Main controller; 10. Work light; 11. Fuel pressure light; 12. Fault light; 13. Control panel; 14. Power interface; 15. Power switch. Detailed Implementation
[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-4 : Example 1 An automatic oil supply pump includes a housing 1, within which a pump assembly 2 for conveying oil is disposed. The housing 1 has an oil inlet 3 connected to the oil supply port of an external auxiliary oil tank and an oil outlet 4 connected to the oil filling port of a generator oil tank. An oil outlet pipe 5, communicating with the oil outlet of the pump assembly 2, is disposed within the oil outlet 4. An oil level detection device 6 is disposed within the oil outlet 4, extending downwards and adapted to be inserted into the generator oil tank to detect the oil level. A flow channel detection device 7 is connected to the oil inlet 3 to detect the flow state of the oil. The flow channel detection device 7 communicates with the oil inlet of the pump assembly 2 through an oil inlet chamber 8. A main controller 9 is also disposed within the housing 1, and the pump assembly 2, oil level detection device 6, and flow channel detection device 7 are electrically connected to the main controller 9.
[0018] In this embodiment, the main controller 9 employs a microcontroller unit (MCU), programmable logic controller (PLC), or integrated circuit with logic processing capabilities, which are conventional in the art. The pump assembly 2 employs a motor-driven plunger pump, gear pump, etc. Both the oil level detection device 6 and the flow channel detection device 7 employ Hall effect sensors. The oil level detection device 6 can detect the liquid level in the generator oil tank online, and the flow channel detection device 7 can detect the oil flow status in the flow channel online. By intelligently judging the liquid level status, the main controller 9 is promptly fed back to control the start and stop of the pump assembly 2 to achieve automatic refueling. The flow channel detection device 7 can monitor the oil storage status in the external auxiliary oil tank and promptly stop the pump assembly 2 and issue an alarm when there is insufficient or no oil.
[0019] Preferably, this embodiment uses delayed start to achieve automated refueling. The detection end of the oil level detection device 6 is located only at the high oil level setting position of the generator oil tank, and the main controller 9 is equipped with a delayed trigger module. Furthermore, the delayed trigger module can use a monostable trigger circuit composed of a 555 timer chip or other modules. The delay time of the delayed trigger module is set to 25 minutes to 35 minutes. The delay time is configured to match the oil consumption rate of the equipment during operation.
[0020] To improve the sensitivity of oil level detection, the oil level detection device 6 includes a first Hall sensor and a second Hall sensor arranged side by side. The signal output terminals of the first Hall sensor and the second Hall sensor are electrically connected to two independent input terminals of the main controller 9, respectively. The first Hall sensor and the second Hall sensor can independently trigger the oil level signal. When the magnetic float rises to the high oil level with the oil level, it will trigger one or both Hall sensors, and the sensor will generate a signal and send it to the main controller 9.
[0021] Preferably, the oil level detection device 6 is coaxially arranged with the oil outlet 4, and the oil outlet pipe 5 is arranged along one side of the axial direction of the oil level detection device 6.
[0022] To visually display the working status of the oil pump, the housing 1 is equipped with a working light 10, a fuel pressure light 11, and a fault light 12, which are electrically connected to the main controller 9 respectively. The housing 1 is equipped with a control panel 13, on which the working light 10, fuel pressure light 11, and fault light 12 are all located. The control panel 13 is also equipped with a power interface 14 and a power switch 15.
[0023] In this embodiment, the oil outlet 4 is a threaded interface.
[0024] The working principle of this embodiment is as follows: After the system is powered on, it is turned on via the push-button switch. The main controller 9 first performs a delay of approximately 5 seconds to prevent accidental operation, while simultaneously detecting the signal from the oil level detection device 6. If a high oil level signal is detected, the pump assembly 2 does not start, and the indicator light 10 flashes once every 2 seconds, indicating that it is in standby mode. If no high oil level signal is detected, the main controller 9 starts the pump assembly 2 and begins pumping oil from the external auxiliary oil tank to the generator oil tank; at this time, the indicator light 10 remains constantly lit. When the oil level rises to the high oil level, the oil level detection device 6 sends a signal, and the main controller 9 controls the pump assembly 2 to stop working, entering standby cycle mode.
[0025] In the cyclic operation mode, when the generator oil tank level drops and the high oil level signal disappears, the delay trigger circuit of the main controller 9 starts to work. After a delay of about 30 minutes (this time can be set as needed), the pump assembly 2 is restarted to replenish oil until the high oil level is reached again.
[0026] During operation, the flow detection device 7 continuously monitors the oil flow and displays it via the fuel pressure light 11. If no oil flow is detected for more than one minute (timed by the main controller 9), the main controller 9 determines it to be a flow fault, forcibly stops the pump assembly 2, and controls the fault light 12 to flash twice per second as an alarm, reminding the user to check the fuel system. After a fault occurs, the user usually needs to manually reset it via a push-button switch to restart it.
[0027] Example 2 This embodiment provides an oil pump with an alternative connection structure to adapt to different generator oil tanks. Specifically, the oil outlet port 4 in this embodiment adopts a snap-fit interface.
[0028] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.
Claims
1. An automatic oil supply pump, comprising a housing (1), wherein a pump assembly (2) for conveying oil is disposed within the housing (1), and the housing (1) is provided with an oil inlet (3) connected to the oil supply port of an external auxiliary oil tank and an oil outlet (4) connected to the oil filling port of a generator oil tank, wherein an oil outlet pipe (5) communicating with the oil outlet of the pump assembly (2) is disposed within the oil outlet (4), characterized in that, An oil level detection device (6) is provided inside the oil outlet (4). The oil level detection device (6) extends downward and is suitable for insertion into the generator oil tank to detect the oil level. The oil inlet (3) is connected to a flow channel detection device (7) to detect the flow state of the oil. The flow channel detection device (7) is connected to the oil inlet of the pump assembly (2) through the oil inlet chamber (8). A main controller (9) is also provided inside the housing (1). The pump assembly (2), the oil level detection device (6), and the flow channel detection device (7) are electrically connected to the main controller (9).
2. An automatic oil feed pump according to claim 1, characterized in that The detection end of the oil level detection device (6) is located only at the high oil level setting position of the generator oil tank, and the main controller (9) is equipped with a delay trigger module.
3. The automatic oil feed pump according to claim 1, wherein The oil level detection device (6) includes a first Hall sensor and a second Hall sensor arranged side by side. The signal output terminals of the first Hall sensor and the second Hall sensor are electrically connected to the two independent input terminals of the main controller (9), respectively.
4. The automatic oil feed pump according to claim 1, wherein The flow channel detection device (7) is a Hall effect flow sensor.
5. The automatic oil feed pump according to claim 1, wherein The housing (1) is provided with a working light (10), a fuel pressure light (11) and a fault light (12) that are electrically connected to the main controller (9).
6. An automatic oil feed pump according to claim 1, wherein The oil outlet (4) adopts a threaded interface or a snap-fit interface.
7. The automatic oil feed pump according to claim 1, wherein The oil level detection device (6) is coaxially arranged with the oil outlet (4), and the oil outlet pipe (5) is arranged along one side of the axial direction of the oil level detection device (6).
8. An automatic oil feed pump according to claim 5, wherein The housing (1) is provided with a control panel (13), and the working light (10), fuel pressure light (11) and fault light (12) are all provided on the control panel (13). The control panel (13) is also provided with a power interface (14) and a power switch (15).