Leaking oil collection and treatment device for medium speed diesel engines

Abstract

The application provides a leakage oil collecting and processing device for a medium-speed diesel engine, which is characterized in that a liquid level meter for displaying the oil level in the collecting tank in real time is arranged on one side wall of the collecting tank, a heater for heating the oil in the collecting tank and a temperature sensor for detecting the oil temperature are arranged on the other side wall of the collecting tank, an oil pump and a liquid level switch are arranged on the top of the collecting tank, the oil outlet of the oil pump is communicated with a daily fuel tank through an oil pipe, the oil pipe communicated with the oil inlet of the oil pump extends into the bottom of the collecting tank, and the temperature control switch of the oil pump, the heater, the liquid level switch and the temperature sensor are connected with an electric control device in a control box, and the start and stop of the oil pump and the heater are controlled by the electric control device. The application can collect all clean leakage oil of the diesel engine and deliver the leakage oil to the daily fuel tank, independently forms a module, realizes the functions of leakage oil collection, heating, delivery and alarm, has low cost, high fuel utilization rate, reduces the emission of dirty oil of the diesel engine and realizes the effective recycling of clean oil.

Description

Technical Field

[0001] This invention belongs to the field of diesel engine technology, specifically relating to a device for collecting and treating leaking oil in a medium-speed diesel engine. Background Technology

[0002] The design of fuel systems for large, medium-speed diesel engines is prone to leakage due to the high fuel pressure exerted on the injection pump, high-pressure fuel lines, and injectors. The injection pump, in particular, must be designed to burn both light and heavy fuel oil. Generally, the plunger-sleeve clearance of the injection pump is relatively large, resulting in significant leakage when burning light fuel oil. This leaked fuel is uncontaminated and can be used directly. However, in older diesel engines, this leaked fuel is typically discharged into the sludge tank along with the engine's sludge line. While some newer diesel engines have separate lines for clean fuel, they lack an integrated and efficient collection and utilization system. Current conventional marine diesel engine fuel systems have the following drawbacks: ① They do not separate clean fuel, instead discharging leaked clean fuel along with sludge into the sludge tank; ② Although some newer diesel engine fuel systems separate clean and sludge fuel, they lack a comprehensive and effective device to utilize this leaked clean fuel. Therefore, improvements are necessary to address these issues. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a leaking oil collection and treatment device for medium-speed diesel engines. By setting up a collection tank for collecting leaking oil and setting up temperature and conveying control structures, it can collect all clean leaking oil from the diesel engine and convey it to the daily fuel tank. It is an independent module that realizes the functions of collecting, heating, conveying and alarming leaking oil. It can effectively improve fuel efficiency at a low cost, reduce diesel engine waste oil emissions, and realize the effective and fully automatic recycling of clean oil, which is in line with the concept of unmanned cabins.

[0004] The technical solution adopted in this invention is as follows: a leakage oil collection and treatment device for medium-speed diesel engines, comprising a collection tank for collecting clean diesel engine oil, a level gauge for real-time display of the oil level in the collection tank installed on one side wall, and a heater for heating the oil inside and a temperature sensor for detecting the oil temperature installed on the other side wall. An oil pump and a level switch are installed on the top of the collection tank. The oil pump outlet is connected to the fuel tank via an oil pipe, and the oil pipe connected to the oil pump inlet extends into the bottom of the collection tank. The temperature control switches of the oil pump, heater, level switch, and temperature sensor are all connected to an electronic control device in a control box. The electronic control device controls the start and stop of the oil pump and heater based on the detection information of the level switch and the oil level information in the fuel tank. If the oil pump fails to start, the electronic control device will issue an alarm.

[0005] The electrical control device includes a frequency converter. The input terminal of the frequency converter is electrically connected to a 24V DC power supply via a circuit breaker QF3. The heater operation branch, the oil pump operation branch, and the alarm and indicator branch are connected in parallel to the output terminal of the frequency converter. The heater and the oil pump are electrically connected to an AC power supply via circuit breakers QF1 and QF2, respectively. The heater operation branch includes a temperature control switch and a contactor KM1. The temperature control switch, the contactor KM1, and the normally open contact QF1-1 of the circuit breaker QF1 are connected in series. The normally open contact KM11-2 of the contactor KM1 is connected in series between the circuit breaker QF1 and the heater. The oil pump operating branch includes contactor KM2 and changeover switch SA2. The output terminal of changeover switch SA2 is connected in series with the normally open contact QF2-1 of thermal-magnetic circuit breaker QF2 and contactor KM2. The first and second input terminals of changeover switch SA2 are both connected in parallel to the output terminal of frequency converter. The liquid level switch includes a low liquid level switch, a high liquid level switch and an ultra-high liquid level switch. The low liquid level switch and the low liquid level switch and the high liquid level switch of the daily oil tank connected in series are connected in parallel to the second input terminal of changeover switch SA2. The normally open contact KM2-2 of contactor KM2 is connected in series between thermal-magnetic circuit breaker QF2 and oil pump.

[0006] Furthermore, the alarm and indication branches include a common fault alarm branch, a power indication branch, a heater operation indication branch, an oil pump operation indication branch, a fault alarm branch, a high liquid level alarm branch for the collection tank, and a high liquid level alarm branch for the daily oil tank, all connected in parallel.

[0007] Furthermore, the common fault alarm branch includes a relay KA1, the normally closed contact QF2-2 of the thermal-magnetic circuit breaker QF2 is connected in series with the relay KA1, and the normally closed contact KA1-2 of the relay KA1 is connected in series in the heater operation control branch.

[0008] Furthermore, the power indicator branch includes indicator light HL1; the heater operation indicator branch includes indicator light HL2, and the normally closed contact KM1-1 of contactor KM1 is connected in series with indicator light HL2; the oil pump operation indicator branch includes indicator light HL3, and the normally closed contact KM2-1 of contactor KM2 is connected in series with indicator light HL3; the fault alarm branch includes indicator light HL4, and the normally open contact KA1-1 of relay KA1 is connected in series with indicator light HL4; the high liquid level alarm branch of the collection tank includes indicator light HL5, and indicator light HL5 is connected in series with the ultra-high liquid level switch; the high liquid level alarm branch of the daily oil tank includes indicator light HL6, and indicator light HL6 is connected in series with the high liquid level switch of the daily oil tank.

[0009] Furthermore, a power switch SA1 is provided on the line where the circuit breaker QF3 is electrically connected to the 24V DC power supply.

[0010] Advantages of this invention compared to existing technologies:

[0011] 1. This technical solution effectively separates clean oil from waste oil by setting up a collection box for collecting leaked oil, thus providing conditions for the full utilization of clean oil;

[0012] 2. This technical solution, by setting up a detection and control structure for heating and transporting the oil in the collection tank, can collect all the clean leaked diesel oil and transport it to the daily fuel tank. It is an independent module that realizes the functions of collecting, heating, transporting and alarming the leaked oil, effectively utilizing the collected clean oil, and achieving a significant increase in fuel efficiency and a reduction in diesel engine waste oil emissions at a low cost.

[0013] 3. This technical solution has a simple structure, novel design, low cost, and reliable operation. It can realize the automatic start and stop of the oil pump according to the liquid level of clean oil in the collection tank, and realize the effective and fully automatic recycling of clean oil, which is in line with the concept of unmanned cabin. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is the control circuit diagram of the present invention;

[0016] Figure 3 This is a block diagram of the liquid level control logic for the collection tank in this invention.

[0017] Figure 4 This is a block diagram of the oil temperature control logic in the collection tank of the present invention. Detailed Implementation

[0018] The following will be based on embodiments of the present invention. Figure 1-4 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] Oil leakage collection and treatment devices for medium-speed diesel engines, such as Figure 1-2 As shown, the system includes a collection tank 1 for collecting clean diesel engine oil. A level gauge 5 is installed on one side wall of the collection tank 1 to display the oil level in real time. A heater 4 for heating the oil inside the collection tank 1 and a temperature sensor 7 for detecting the oil temperature are installed on the other side wall. An oil pump 2 and a level switch 3 are installed on the top of the collection tank 1. The oil pump 2's outlet is connected to a fuel tank 8 via an oil pipe, and the oil pipe connected to the oil pump 2's inlet extends into the bottom of the collection tank 1. The oil pump 2, heater 4, level switch 3, and temperature sensor 7 are all connected to an electronic control device in a control box 6. The electronic control device adjusts the oil level based on the detection information from the level switch 3. The system controls the start and stop of the oil pump 2 and heater 4 based on the liquid level information in the daily fuel tank 8. If the oil pump 2 fails to start, the electronic control device will issue an alarm. In the above structure, by setting up a collection tank 1 for collecting leaked oil, clean oil and dirty oil are effectively stored separately, providing conditions for the full utilization of clean oil. By setting up a detection and control structure for heating and transporting the oil in the collection tank 1, all clean leaked oil from the diesel engine can be collected and transported to the daily fuel tank 8. This independent module realizes the functions of collecting, heating, transporting and alarming leaked oil, effectively utilizing the collected clean oil, and achieving a lower cost to effectively improve fuel efficiency and reduce diesel engine waste oil emissions.

[0022] like Figure 2As shown, the electrical control device is specifically as follows: The electrical control device includes a frequency converter 9, which provides the required 24V DC control power for the detection and control circuit. The input terminal of the frequency converter 9 is electrically connected to the 24V DC power supply through a circuit breaker QF3, and the heater operation branch, oil pump operation branch, and alarm and indicator branch are connected in parallel to the output terminal of the frequency converter 9. The heater 4 and oil pump 2 are electrically connected to the AC power supply through circuit breakers QF1 and QF2, respectively. The heater operation branch includes a temperature control switch 10 and a contactor KM1. The temperature control switch 10, contactor KM1, and the normally open contact QF1-1 of the circuit breaker QF1 are connected in series. The normally open contact KM11-2 of the contactor KM1 is connected in series between the circuit breaker QF1 and the heater 4. The oil pump operating branch includes contactor KM2 and changeover switch SA2. The output terminal of changeover switch SA2 is connected in series with the normally open contact QF2-1 of thermal-magnetic circuit breaker QF2 and contactor KM2. The first and second input terminals of changeover switch SA2 are both connected in parallel to the output terminal of frequency converter 9. The liquid level switch 3 includes a low liquid level switch 11, a high liquid level switch 12, and an ultra-high liquid level switch 15. The low liquid level switch 11 and the low liquid level switch 13 of the daily oil tank connected in series with the high liquid level switch 12 are connected in parallel to the second input terminal of changeover switch SA2. The normally open contact KM2-2 of contactor KM2 is connected in series between thermal-magnetic circuit breaker QF2 and oil pump 2. According to the control logic of the liquid level height of collection tank 1 and the oil temperature control logic, as follows: Figure 3-4 As shown.

[0023] In the above structure, when the thermal-magnetic circuit breaker QF2 is closed, the normally open contact QF2-1 is closed. When the changeover switch SA2 is in the manual position, the start and stop of the oil pump 2 can be manually controlled. When the changeover switch SA2 is closed, the coil of contactor KM2 is energized, the normally open contact KM2-2 is closed, and the oil pump 2 starts. When the changeover switch SA2 is in the automatic position, in the first case, when the oil level in the collection tank 1 is low, the low level switch 11 is open, the coil in contactor KM2 is not energized, the normally open contact KM2-2 is open, and the oil pump 2 stops. In the second case, when the oil level in the collection tank 1 is high and the oil level in the daily oil tank is low, the low level switch 11 is closed, and the daily oil pump 2 stops. When the low-level switch 13 and high-level switch 12 of the oil tank are closed simultaneously, the changeover switch SA2 is closed, the coil of contactor KM2 is energized, the normally open contact KM2-2 is closed, and the oil pump 2 starts. When the circuit breaker QF1 is closed, the normally open contact QF1-1 is closed. When the temperature sensor 7 detects that the oil temperature in the collection tank 1 is lower than the set temperature, the temperature control switch 10 is closed. At this time, the coil of contactor KM1 is energized, the normally open contact KM11-2 is closed, and the heater 4 starts. Conversely, when the temperature sensor 7 detects that the oil temperature in the collection tank 1 is higher than the set temperature, the temperature control switch 10 is opened, the coil of contactor KM1 is de-energized, the normally open contact KM11-2 is opened, and the heater 4 is turned off.

[0024] like Figure 2 As shown, the alarm and indication branches are as follows: The alarm and indication branches include a common fault alarm branch, a power indication branch, a heater operation indication branch, an oil pump operation indication branch, a fault alarm branch, a high liquid level alarm branch for the collection tank, and a high liquid level alarm branch for the daily oil tank, all connected in parallel.

[0025] The power indicator branch includes indicator light HL1; the heater operation indicator branch includes indicator light HL2, and the normally closed contact KM1-1 of contactor KM1 is connected in series with indicator light HL2; the oil pump operation indicator branch includes indicator light HL3, and the normally closed contact KM2-1 of contactor KM2 is connected in series with indicator light HL3; the fault alarm branch includes indicator light HL4, and the normally open contact KA1-1 of relay KA1 is connected in series with indicator light HL4; the high liquid level alarm branch of the collection tank includes indicator light HL5, and indicator light HL5 is connected in series with ultra-high liquid level switch 15; the high liquid level alarm branch of the daily oil tank includes indicator light HL6, and indicator light HL6 is connected in series with high liquid level switch 14 of the daily oil tank.

[0026] The common fault alarm branch includes a relay KA1, the normally closed contact QF2-2 of the thermal magnetic circuit breaker QF2 is connected in series with the relay KA1, and the normally closed contact KA1-2 of the relay KA1 is connected in series in the heater operation control branch.

[0027] When the thermal-magnetic circuit breaker QF2 trips abnormally, the normally closed contact QF2-2 closes, relay KA1 is energized, the normally closed contact KA1-2 opens, the contactor KM1 coil is de-energized, the normally open contact KM11-2 opens, and the heater 4 stops operating, thus protecting the heater 4 in case of a fault in oil pump 2. Simultaneously, the normally open contact KA1-1 closes, and indicator light HL3 is energized, providing a fault display alarm. When the contactor KM1 coil is de-energized, the normally closed contact KM1-1 closes, and indicator light HL2 is energized, displaying a heater operation fault. Alarm: When circuit breaker QF2 trips abnormally, normally open contact QF2-1 opens, contactor KM2 coil is de-energized, normally closed contact KM2-1 closes, and indicator light HL3 is energized, thus triggering an alarm to indicate the operation of the oil pump. When the oil level in collection tank 1 is too high, high level switch 15 closes, and indicator light HL5 is energized, thus triggering an alarm to indicate the high level in collection tank 1. When the oil level in the daily oil tank is high, high level switch 14 closes, and indicator light HL6 is energized, thus triggering an alarm to indicate the high level in the daily oil tank.

[0028] The circuit breaker QF3 is connected to a 24V DC power supply via a power switch SA1. The power switch SA1 is used to control the power supply to the alarm circuit.

[0029] This technical solution has a simple structure, novel design, low cost, and reliable operation. It can realize the automatic start and stop of oil pump 2 according to the liquid level of clean oil in collection tank 1, and realize the effective and fully automatic recycling of clean oil, which is in line with the concept of unmanned cabin.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for collecting and treating leaking oil from a medium-speed diesel engine, characterized in that: The system includes a collection tank (1) for collecting clean diesel engine oil. A level gauge (5) for displaying the oil level in the collection tank (1) in real time is installed on one side wall of the collection tank (1), and a heater (4) for heating the oil inside the collection tank (1) and a temperature sensor (7) for detecting the oil temperature are installed on the other side wall of the collection tank (1). An oil pump (2) and a level switch (3) are installed on the top of the collection tank (1). The oil outlet of the oil pump (2) is connected to the fuel tank (8) for daily use via an oil pipe. The oil pipe, which is connected to the oil inlet of the oil pump (2), extends into the bottom of the collection tank (1). The temperature control switch (10) of the oil pump (2), heater (4), liquid level switch (3), and temperature sensor (7) are all connected to the electrical control device in the control box (6). The electrical control device controls the start and stop of the oil pump (2) and heater (4) according to the detection information of the liquid level switch (3) and the liquid level information in the fuel daily fuel tank (8). When the oil pump (2) fails to start, the electrical control device will issue an indication alarm. The electrical control device includes a frequency converter (9). The input terminal of the frequency converter (9) is electrically connected to a 24V DC power supply through a circuit breaker QF3. The heater operation branch, the oil pump operation branch, and the alarm and indicator branch are connected in parallel to the output terminal of the frequency converter (9). The heater (4) and the oil pump (2) are electrically connected to an AC power supply through a circuit breaker QF1 and a thermal-magnetic circuit breaker QF2, respectively. The heater operation branch includes a temperature control switch (10) and a contactor KM1. The temperature control switch (10), the contactor KM1, and the normally open contact QF1-1 of the circuit breaker QF1 are connected in series. The normally open contact KM11-2 of the contactor KM1 is connected in series between the circuit breaker QF1 and the heater (4). The oil pump The operating branch includes contactor KM2 and changeover switch SA2. The output terminal of changeover switch SA2 is connected in series with the normally open contact QF2-1 of thermal-magnetic circuit breaker QF2 and contactor KM2. The first and second input terminals of changeover switch SA2 are both connected in parallel to the output terminal of frequency converter (9). The liquid level switch (3) includes a low liquid level switch (11), a high liquid level switch (12) and an ultra-high liquid level switch (15). The low liquid level switch (11) and the low liquid level switch (13) of the daily oil tank connected in series with the high liquid level switch (12) are connected in parallel to the second input terminal of changeover switch SA2. The normally open contact KM2-2 of contactor KM2 is connected in series between thermal-magnetic circuit breaker QF2 and oil pump (2).

2. The oil leakage collection and treatment device for a medium-speed diesel engine according to claim 1, characterized in that: The alarm and indication branches include a common fault alarm branch, a power indication branch, a heater operation indication branch, an oil pump operation indication branch, a fault alarm branch, a high liquid level alarm branch for the collection tank, and a high liquid level alarm branch for the daily oil tank, all connected in parallel.

3. The oil leakage collection and treatment device for a medium-speed diesel engine according to claim 2, characterized in that: The common fault alarm branch includes relay KA1, the normally closed contact QF2-2 of the thermal magnetic circuit breaker QF2 is connected in series with relay KA1, and the normally closed contact KA1-2 of relay KA1 is connected in series in the heater operation control branch.

4. The oil leakage collection and treatment device for a medium-speed diesel engine according to claim 3, characterized in that: The power indicator branch includes indicator light HL1; the heater operation indicator branch includes indicator light HL2, and the normally closed contact KM1-1 of the contactor KM1 is connected in series with indicator light HL2; the oil pump operation indicator branch includes indicator light HL3, and the normally closed contact KM2-1 of the contactor KM2 is connected in series with indicator light HL3; the fault alarm branch includes indicator light HL4, and the normally open contact KA1-1 of the relay KA1 is connected in series with indicator light HL4; the high liquid level alarm branch of the collection tank includes indicator light HL5, and indicator light HL5 is connected in series with the ultra-high liquid level switch (15); the high liquid level alarm branch of the daily oil tank includes indicator light HL6, and indicator light HL6 is connected in series with the high liquid level switch (14) of the daily oil tank.

5. The oil leakage collection and treatment device for a medium-speed diesel engine according to any one of claims 2-4, characterized in that: A power switch SA1 is installed on the line where the circuit breaker QF3 is electrically connected to the 24V DC power supply.

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