Self-resetting new energy sealing type ship high-pressure oil injector safety valve

Abstract

The invention provides a self-resetting new energy sealed ship high-pressure fuel injector safety valve, and relates to the technical field of new energy engines, the safety valve comprises a safety valve shell, a safety sealing block is slidably mounted in the safety valve shell, an annular buffer plate is arranged on the side face of the safety sealing block, and a buffer channel is formed in the annular buffer plate; the buffer channels are annularly arranged with the annular buffer piece as the circle center, an annular centrifugal piece is arranged on the side face of the annular buffer piece, an oil dirt filter screen is fixedly installed on the surface of the annular centrifugal piece, and a pressure buffer mechanism is arranged below the safety valve shell. By means of the annular buffer piece and the annularly-arranged buffer channels, high-pressure oil can be efficiently shunted and decompressed at the initial opening stage of the safety valve, when pipeline pressure suddenly rises and high-pressure oil is impacted due to fuel quality difference, fuel injector faults and the like of a ship extended-range engine, concentrated flow beams can be dispersed into multiple strands through the buffer channels, and therefore the safety valve is protected. And the initial impact force is greatly weakened.

Description

Technical Field

[0001] This invention belongs to the field of new energy engine technology, and more specifically, it relates to a self-resetting new energy sealed marine high-pressure fuel injector safety valve. Background Technology

[0002] Vessels using range extender engines are a core option for the green transformation of shipping. Their power system is based on a range extender plus electric drive. The range extender can be adapted to fuels such as diesel, methanol, or ammonia hydrogen. It is only responsible for driving the generator to generate electricity rather than directly driving the hull. With waterproof and explosion-proof power battery packs and intelligent control systems, it can flexibly switch between zero-emission and low-noise pure electric mode navigation and long-range navigation with range extender and recharge. These vessels avoid the range limitations of pure electric vessels, with a combined range of up to three times that of pure electric vessels of the same class. They do not rely on dense shore power facilities, and can significantly reduce pollutant emissions. Moreover, their operating costs are lower than those of traditional fuel oil vessels. They are widely applicable to scenarios such as inland waterway freight, near-shore commuting, tourism, and fishing operations, becoming a shipping solution that balances environmental and economic benefits.

[0003] Current fuel injector safety valves have been found to have at least the following problems: First, in the operating scenarios of range-extending engines for new energy ships, ships often sail in different sea areas, refueling with fuels of different standards and qualities. They also face engine load fluctuations caused by complex sea conditions over a long period of time. These factors can easily cause abnormal and sudden pressure increases in the injector lines. Faults such as injector needle valve sticking, nozzle blockage, and poor oil return system can further aggravate the problem of pressure sudden changes. High-pressure oil will form a concentrated impact force when the safety valve opens, directly acting on the low-pressure fuel tank and pipeline interfaces. Over time, this can easily lead to deformation of the fuel tank shell and failure of pipeline interface seals, causing the risk of fuel leakage. In addition, the safety valve is not continuously working. The fuel and lubricating oil remaining inside can easily solidify into grease under temperature changes. Impurities and deposits will adhere to the surface of core components such as safety sealing blocks, sealing pipelines, and safety valve seats. With the accumulation of use time, it may cause component sticking and a decrease in sealing precision, which will affect the opening and closing response speed of the safety valve, or even cause seal failure, making it impossible to effectively achieve overpressure protection. In severe cases, it will damage key components of the fuel injection system, affecting the navigation safety and reliability of the ship.

[0004] Secondly, the fuel injection system of the range extender engine for new energy ships is in a high-pressure, humid and hot marine environment for a long time. During the storage, transportation and refueling process, the fuel is easily mixed with mechanical impurities, combustion residues and other pollutants. In addition, the ship's navigation area is scattered and the fuel quality is uneven, which further increases the impurity content of the fuel. When the safety valve is not in operation, the fuel residue inside is prone to solidify due to temperature changes, forming sludge. If this sludge and impurities enter the fuel injection system with the fuel circulation, they will block the injector nozzles, resulting in poor fuel atomization and incomplete fuel combustion. This not only reduces the engine's power output efficiency, but also increases exhaust emissions. Impurities may also cause the injector needle valve to stick, affecting the fuel injection timing and fuel injection quantity control, and aggravating engine wear. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a self-resetting, sealed safety valve for high-pressure fuel injectors in new energy marine applications. This valve addresses the challenges of operating range-extending engines in new energy marine vessels, where ships frequently navigate different sea areas, receiving fuels of varying standards and qualities, and experiencing engine load fluctuations due to complex sea conditions. These factors can easily cause abnormal pressure spikes in the injector lines. Faults such as injector needle valve sticking, nozzle blockage, and poor return oil system operation can further exacerbate pressure surges. The high-pressure fuel creates a concentrated impact force the moment the safety valve opens, directly affecting the low-pressure fuel tank and pipeline interfaces. Over time, this can lead to fuel tank deformation, pipeline interface seal failure, and the risk of fuel leakage.

[0006] A self-resetting, new energy-sealed marine high-pressure fuel injector safety valve includes a safety valve housing. A safety sealing block is slidably installed inside the safety valve housing. An annular buffer plate is provided on the side of the safety sealing block. A buffer channel is opened on the annular buffer plate. The buffer channel is arranged in a ring around the annular buffer plate. An annular centrifugal plate is provided on the side of the annular buffer plate. An oil sludge filter screen is fixedly installed on the surface of the annular centrifugal plate. A pressure buffer mechanism is provided below the safety valve housing. The pressure buffer mechanism can buffer the impact when the safety valve is initially opened through the annular buffer plate and the buffer channel opened thereon. When the oil impacts, it can guide the oil to flush the other parts of the safety valve and remove internal oil sludge and other deposits. A cleaning oil filter mechanism is provided on the side of the safety valve housing. The cleaning oil filter mechanism can filter out impurities in the oil. When the oil impact force is too high, it converts the impact force into the rotation of the annular buffer plate and the annular centrifugal plate, throwing out the oil sludge filtered by the oil sludge filter screen.

[0007] Preferably, the pressure buffer mechanism includes an injector connection port located at the lower end of the safety valve housing. The lower end of the injector connection port is connected to the injection line of the new energy engine injector. A safety valve seat is fixedly installed inside the injector connection port. A safety sealing valve is fixedly installed above the safety valve seat. A safety sealing block is located above the safety sealing valve. The safety sealing valve and the safety sealing block form a sealing fit. A sealing line is fixedly installed inside the safety valve housing. A sealing push rod is fixedly installed at the upper end of the safety sealing block. A spring baffle is provided above the safety sealing block. The safety sealing block and the sealing push rod are slidably installed inside the sealing line. A safety valve top cover is provided above the sealing line. The other end of the sealing push rod is slidably installed with the safety valve top cover.

[0008] Preferably, the sealing push rod is provided with a sealing return spring, which is located between the safety sealing block and the top cover of the safety valve. The side of the injector connection port is provided with an oil discharge pipe, and a quick-release interface is fixedly installed on the oil discharge pipe by threads. The other end of the quick-release interface is connected to the low-pressure oil tank. The annular buffer plate is located inside the oil discharge pipe, and a connecting rod is fixedly installed on the annular buffer plate. A channel is opened at the center of the annular buffer plate. The oil discharge pipe is provided with a one-way valve, and a high-pressure flushing pipe is provided on the one-way valve. The other end of the high-pressure flushing pipe is connected to the outer shell of the safety valve.

[0009] Preferably, the cleaning and filtering mechanism includes a locking rod, an oil stain collection ring inside the oil discharge pipe, an impurity collection groove inside the oil stain collection ring, an annular centrifugal disc and an annular buffer disc rotatably mounted inside the oil stain collection ring, a locking rod fixedly mounted on the surface of the annular buffer disc, the locking rods arranged in a ring around the center of the annular buffer disc, the locking rods located between the annular buffer disc and the annular centrifugal disc, a positioning connecting groove opened on the annular centrifugal disc, the positioning connecting groove being opened corresponding to the position of the locking rod, a filter screen connecting groove opened on the annular buffer disc, a spring baffle on one end of the connecting rod, an oil separation groove opened on the annular centrifugal disc, a pressure spring installed on the connecting rod, the connecting rod slidingly mounted on the center of the annular centrifugal disc, and a filter screen being provided at the center of the annular centrifugal disc.

[0010] Compared with the prior art, the present invention has the following beneficial effects: In this invention, a pressure buffer mechanism is provided, which includes an annular buffer plate and annularly arranged buffer channels. This mechanism can efficiently divert and reduce the pressure of high-pressure oil at the initial opening of the safety valve. Marine range extender engines often experience a sudden increase in pipeline pressure due to fuel quality differences, injector malfunctions, etc. When high-pressure oil impacts, the buffer channels can disperse the concentrated flow into multiple streams, significantly weakening the initial impact force and preventing damage to the low-pressure tank and pipeline interfaces due to direct pressure. During the oil impact process, some fluid can be guided to the internal cavity of the safety valve to flush the surfaces of core components such as the safety sealing block, sealing pipeline, and safety valve seat. This effectively removes oil stains and impurities deposited over long-term use, preventing components from becoming stuck or failing to seal due to scale buildup. Furthermore, the oil film formed after flushing can reduce motion friction and extend the service life of components, making it suitable for the harsh operating conditions of long-term marine navigation.

[0011] In this invention, a cleaning and filtration mechanism is incorporated, integrating components such as annular centrifugal discs, oil stain filter screens, locking rods, positioning connecting grooves, and pressure springs. This achieves efficient filtration and automatic cleaning of oil impurities. During ship navigation, fuel is easily mixed with mechanical impurities and combustion residues, and residual oil inside the safety valve easily solidifies into oil stains. The dual filtration structure at the center of the oil stain filter screen and the annular centrifugal discs can accurately intercept these contaminants, ensuring the cleanliness of the oil returning to the low-pressure fuel tank. This prevents impurities from circulating into the fuel injection system and causing malfunctions such as nozzle blockage and needle valve jamming. When the oil impact force is too high, the pressure will push the annular buffer plate to compress the pressure spring, causing the locking rod to embed into the positioning connecting groove, thus linking the annular buffer plate and the annular centrifugal disc. The oil drives both to rotate at high speed through the inclined channel, using centrifugal force to throw the oil stains and impurities on the filter screen into the oil stain collection ring, preventing filter screen blockage from affecting the pressure relief flow and ensuring the continuous and stable operation of the safety valve.

[0012] In this invention, a cooperative structure consisting of a sealing return spring and a sealing pipeline achieves reliable self-resetting and high-pressure sealing of the safety valve. Under normal operating conditions, the preload of the sealing return spring pushes the safety sealing block to fit tightly against the safety sealing valve, forming a tight seal, blocking the pressure relief channel, and ensuring stable pressure in the fuel injection system. When the pipeline pressure exceeds the threshold, the safety sealing block slides upward along the sealing pipeline, forming a temporary sealing chamber to prevent pressure collision between the upper and lower ends and protect the upper components from high-pressure impact. After the pressure drops to a safe value, the sealing return spring quickly pushes the safety sealing block to reset, restoring the sealing state without manual intervention, thus improving system response efficiency. The sliding cooperation between the sealing pipeline and the safety sealing block ensures pressure stability during the pressure relief process and reduces the risk of oil leakage, meeting the stringent sealing requirements of high-pressure fuel injection in marine new energy engines, while avoiding fuel waste and environmental risks caused by seal failure.

[0013] In this invention, a self-cleaning and lubrication circuit for components is constructed by incorporating a high-pressure flushing pipe and a one-way valve. During pressure relief, some high-pressure oil enters the high-pressure flushing pipe through the one-way valve and flows back into the safety valve housing. The impact force of the high-pressure fluid thoroughly flushes key components such as the safety sealing block, the inner wall of the sealing pipe, and the safety valve seat, completely removing attached oil stains and deposits. This solves the problem of internal scale buildup in traditional safety valves caused by long-term inactivity. The flushed oil forms a uniform oil film on the surface of the components, which can significantly reduce the friction coefficient of moving parts such as the safety sealing block and sealing push rod, reduce wear and jamming risks, and extend the service life of the components. The one-way valve prevents the backflow of oil in the low-pressure oil tank, ensuring stable flushing pressure and preventing impurities from entering the safety valve from the back, ensuring the continuity of self-cleaning and lubrication effects. This invention is suitable for scenarios with long maintenance cycles and limited maintenance conditions during long-distance voyages of ships.

[0014] In this invention, an elastic connection structure consisting of a connecting rod and a pressure spring enables adaptive linkage between the annular buffer plate and the annular centrifugal plate. Under normal pressure relief conditions, the pressure spring supports the annular buffer plate at a fixed distance, ensuring the pressure reduction effect of the buffer channel. When the oil impact force exceeds the set range, the pressure spring is compressed, pushing the annular buffer plate and the annular centrifugal plate to engage and activate the high-speed rotation impurity removal mode, achieving adaptive switching between low-pressure buffering and high-pressure impurity removal. This design ensures stable pressure relief under normal overpressure conditions and can also cope with impurity blockage during extreme high-pressure impacts, improving the adaptability of the safety valve. At the same time, the cooperation between the connecting rod and the pressure spring can buffer the impact force when the annular buffer plate and the annular centrifugal plate engage, reducing component collision wear, extending the service life of the linkage mechanism, and ensuring stable operation of the safety valve under conditions of large fluctuations in ship engine load and drastic pressure changes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the high-pressure flushing pipe structure of the present invention; Figure 3 This is a schematic diagram of the safety sealing block structure of the present invention; Figure 4 This is a schematic diagram of the quick-release interface structure of the present invention; Figure 5 This is a schematic diagram of the oil discharge pipe structure of the present invention; Figure 6 This is a schematic diagram of the one-way valve structure of the present invention; Figure 7 This is a schematic diagram of the connecting rod structure of the present invention; Figure 8 This is a schematic diagram of the oil stain filter structure of the present invention; Figure 9This is a schematic diagram of the oil separation tank structure of the present invention; Figure 10 This is the present invention. Figure 6 Enlarged view of the structure at point A in the middle.

[0016] In the diagram, the correspondence between component names and attached drawing numbers is as follows: 1. Injector connector; 2. Safety valve seat; 3. Safety sealing valve; 4. Safety sealing block; 5. Sealing pipeline; 6. Safety valve housing; 7. Sealing return spring; 8. Sealing push rod; 9. Safety valve top cover; 10. Oil discharge pipe; 11. High-pressure flushing pipeline; 12. Quick-release interface; 13. One-way valve; 14. Oil sludge collection ring; 15. Annular buffer plate; 16. Locking push rod; 17. Buffer channel; 18. Filter screen connection groove; 19. Connecting rod; 20. Pressure spring; 21. Annular centrifugal disc; 22. Positioning connection groove; 23. Oil sludge filter screen; 24. Oil separation groove. Detailed Implementation

[0017] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0018] Please see Figures 1-10 This invention provides a self-resetting, new energy-sealed safety valve for marine high-pressure injectors, including a safety valve housing 6. A safety sealing block 4 is slidably installed inside the safety valve housing 6. The safety sealing block 4 seals the connection between the injector pipeline and the safety valve. When the pressure exceeds a set value, it can be pushed open to relieve pressure in the pipeline. An annular buffer plate 15 is provided on the side of the safety sealing block 4, and a buffer channel 17 is formed on the annular buffer plate 15. The buffer channels 17 are arranged in a ring around the annular buffer plate 15. In case of abnormal pressure inside the injector pipeline, the safety valve is opened. After the fully sealed block 4, the annular buffer plate 15 and the buffer channel 17 can buffer the high-pressure oil and prevent the low-pressure oil tank from being directly impacted and damaged. The annular buffer plate 15 is provided with an annular centrifugal plate 21 on its side. An oil stain filter screen 23 is fixedly installed on the surface of the annular centrifugal plate 21. Since the safety valve is not always in the working state, the internal lubricating oil and the oil from the last start may solidify into oil stains inside. The oil stain filter screen 23 is used to filter out the oil stains in the high-pressure oil, so that the oil entering the low-pressure oil tank is clean oil and reduces impurities in it.

[0019] A pressure buffer mechanism is provided below the safety valve housing 6. The pressure buffer mechanism can buffer the impact when the safety valve is first opened through the annular buffer plate 15 and the buffer channel 17 opened on it, so as to prevent excessive oil pressure impact from damaging the low-pressure oil tank. When the oil impacts, it can guide the oil to flush the other parts of the safety valve and remove internal oil and other deposits. A cleaning oil filter mechanism is provided on the side of the safety valve housing 6. The cleaning oil filter mechanism can filter out impurities in the oil. When the oil impact force is too high, it converts the impact force into the rotation of the annular buffer plate 15 and the annular centrifugal plate 21, which throws out the oil residue filtered by the oil residue filter screen 23.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, the pressure buffer mechanism includes an injector connection port 1, located at the lower end of the safety valve housing 6. The lower end of the injector connection port 1 is connected to the injection line of the new energy engine injector. A safety valve seat 2 is fixedly installed inside the injector connection port 1. A safety sealing valve 3 is fixedly installed above the safety valve seat 2. A safety sealing block 4 is located above the safety sealing valve 3. The safety sealing valve 3 and the safety sealing block 4 form a sealing fit. The safety sealing valve 3 is used to seal the medium on the injector line side in cooperation with the safety sealing block 4, and at the same time provides positioning support for the pressure relief channel in case of overpressure. A sealing pipeline 5 is fixedly installed inside the safety valve housing 6. A sealing push rod 8 is fixedly installed on the upper end of the safety sealing block 4. A spring stop is provided above the safety sealing block 4. The safety sealing block 4 and the sealing push rod 8 are slidably installed inside the sealing pipeline 5. A safety valve top cover 9 is located above the sealing pipeline 5. The other end of the sealing push rod 8 is slidably installed with the safety valve top cover 9. A sealing return spring 7 is located on the sealing push rod 8, between the safety sealing block 4 and the safety valve top cover 9. When a ship arrives in different countries or regions, the different fuel standards in different areas, and the replacement of different fuels with new energy range extender engines, may cause pressure fluctuations in the injector pipeline. If the pressure in the injector pipeline is too high, the pressure will push the safety sealing block 4 up. At this time, the safety sealing block 4 slides into the sealing pipeline 5 to form a sealing fit, reducing the impact of the oil on the parts above the safety sealing block 4. (Injector connection port) A side-mounted oil discharge pipe 10 is provided, on which a quick-release interface 12 is threadedly fixed. The other end of the quick-release interface 12 is connected to a low-pressure oil tank. An annular buffer plate 15 is located inside the oil discharge pipe 10, and a connecting rod 19 is fixedly installed on the annular buffer plate 15. A channel is opened at the center of the annular buffer plate 15. When oil impacts into the oil discharge pipe 10, it is buffered to a certain extent by the annular buffer plate 15 to avoid damage to the low-pressure oil tank at the other end of the quick-release interface 12. A one-way valve 13 is provided on the oil discharge pipe 10 to control the one-way transmission of oil. A high-pressure flushing pipe 11 is provided on the one-way valve 13, and the other end of the high-pressure flushing pipe 11 is connected to the safety valve housing 6. As the safety sealing block 4 is pushed upward, the oil can enter the safety valve housing 6 from the one-way valve 13 on the oil discharge pipe 10 and the high-pressure flushing pipe 11. The pressure in the injector connection port 1 can make the oil have a strong impact force, flushing the oil stains on the many parts inside the safety valve housing 6 and attaching an oil film on them, increasing their service life. The safety sealing block 4 moves upward and forms a sealed chamber with the sealing pipe 5, which can prevent the pressure at both ends from colliding. When the oil pressure in the injector pipe decreases, the safety sealing block 4 is pushed back to its original position by the sealing reset spring 7, and the seal between the sealing pipe 5 and the safety sealing block 4 is released. The oil with oil stains enters the oil discharge pipe 10 from the sealing pipe 5 and is subsequently intercepted by the cleaning and filtering mechanism.

[0021] like Figure 5 , Figure 6 , Figure 8 , Figure 9 and Figure 10 As shown, the cleaning and filtering mechanism includes a locking rod 16, an oil sludge collection ring 14 inside the oil discharge pipe 10, an impurity collection groove inside the oil sludge collection ring 14, an annular centrifugal disc 21 and an annular buffer disc 15 rotatably mounted inside the oil sludge collection ring 14, a locking rod 16 fixedly mounted on the surface of the annular buffer disc 15, the locking rods 16 arranged in a ring around the center of the annular buffer disc 15, the locking rods 16 located between the annular buffer disc 15 and the annular centrifugal disc 21, a positioning connecting groove 22 opened on the annular centrifugal disc 21, the positioning connecting groove 22 being opened corresponding to the position of the locking rod 16, a filter screen connecting groove 18 opened on the annular buffer disc 15, the filter screen connecting groove 18 being used to connect the channel opened on the annular buffer disc 15 and the buffer channel 17, a spring baffle at one end of a connecting rod 19, a pressure spring 20 mounted on the connecting rod 19, the connecting rod 19 slidingly mounted on the center of the annular centrifugal disc 21, the center of the annular centrifugal disc 21 being equipped with a filter screen, due to the different types of fuel added to the ship in different areas Fuel of different qualities and with excessive impurities may produce oil sludge when it enters the injector. The oil flowing back from the safety valve housing 6 also contains impurities. When the oil passes through the annular centrifugal plate 21, the impurities are intercepted by the oil sludge filter screen 23 and the filter screen in the center of the annular centrifugal plate 21. When the oil impact is too large, the impact force drives the annular buffer plate 15 to compress the pressure spring 20. The annular buffer plate 15 will move towards the annular centrifugal plate 21. The locking rod 16 on the annular buffer plate 15 is engaged with the positioning connecting groove 22. The annular centrifugal plate 21 has an oil separation groove 24, which is connected to the buffer channel 17 to form a connected inclined channel. When the oil impacts, it will drive the annular buffer plate 15 and the annular centrifugal plate 21 to rotate at high speed. The impurities filtered by the oil sludge filter screen 23 will be thrown into the collection groove on the oil sludge collection ring 14 by the centrifugal force generated by the high speed rotation. When the new energy engine stops working, the staff can directly rotate and remove the quick-release interface 12 to clean the impurities in the oil sludge collection ring 14.

[0022] Working principle: In the first step, when the new energy range extender engine is running normally, the sealing return spring 7 is in a pre-tightened state, and its elastic force continuously acts on the safety sealing block 4, pushing the safety sealing block 4 to fit tightly with the safety sealing valve 3 above the safety valve seat 2, forming a reliable sealing fit, completely blocking the connection between the injector pipeline and the pressure relief channel of the safety valve. At this time, after diesel fuel enters the main oil passage of the injector through the injector connection port 1, it is only delivered to the combustion chamber along the normal injection path to participate in combustion. The safety valve remains closed throughout the process, ensuring that the pressure of the injection system is stable within the design working range to meet the engine power output requirements. At the same time, the one-way valve 13 on the oil discharge pipe 10 is closed to prevent the oil in the low-pressure oil tank from flowing back into the safety valve, ensuring that the sealing environment is not disturbed.

[0023] The second step involves the following steps: When the ship refuels with different standards of fuel in different areas, or when the pressure in the injector pipeline rises abnormally due to faults such as stuck injector needle valve, blocked nozzle, or poor return system, and exceeds the preset safety threshold of the safety valve, the upward thrust generated by the high-pressure oil overcomes the preload of the sealing return spring 7 and pushes the safety sealing block 4 to slide upward along the sealing pipeline 5. During the upward movement of the safety sealing block 4, it forms a temporary sealing chamber with the sealing pipeline 5, effectively isolating the pressure at the upper and lower ends and preventing the high-pressure oil from directly impacting the upper part of the safety valve. At the same time, it provides a stable pressure transmission path for the pressure relief process. At this time, the high-pressure oil enters the pressure relief channel through the oil discharge pipe 10 on the side of the injector connection port 1. It first contacts the annular buffer plate 15 located in the oil discharge pipe 10. The pressure is reduced by diverting the concentrated high-pressure oil into multiple streams through the buffer channels 17 arranged in a circular pattern on the annular buffer plate 15. This significantly weakens the impact force during the initial pressure relief and prevents the high-pressure oil from directly impacting the low-pressure tank, causing damage to the tank or leakage at the interface.

[0024] Thirdly, after passing through the buffer channel 17 of the annular buffer plate 15, the high-pressure oil continues to flow to the annular centrifugal plate 21. First, it passes through the oil stain filter 23 fixedly installed on the surface of the annular centrifugal plate 21. Since the safety valve is not continuously working, the lubricating oil remaining inside and the oil that was not discharged after the last depressurization may solidify due to temperature changes, forming oil stains. At the same time, the fuel may contain mechanical impurities, combustion residues, etc. The oil stain filter 23 can effectively intercept these deposits, ensuring that the oil flowing into the low-pressure fuel tank is clean. Meanwhile, some of the high-pressure oil opens the one-way valve 13 under pressure and flows back to the inside of the safety valve housing 6 through the high-pressure flushing pipe 11. The high-pressure impact force of the oil thoroughly flushes the surfaces of core components such as the safety sealing block 4, the sealing pipe 5, and the safety valve seat 2, completely removing the oil stains and impurities attached to the surface of the components, avoiding the accumulation of deposits that may lead to sealing failure or component jamming. The flushed oil will also form a uniform oil film on the surface of the components, which plays a lubricating role, reducing mechanical wear during subsequent movement and extending the service life of the components.

[0025] Fourthly, if the pressure inside the injector line is abnormally high, causing the oil impact force to exceed the bearing limit of the pressure spring 20 on the connecting rod 19, the thrust of the oil will drive the annular buffer plate 15 to move towards the annular centrifugal plate 21, compressing the pressure spring 20. As the annular buffer plate 15 moves, the locking pins 16 arranged in a circular pattern on its surface gradually embed into the corresponding positioning connecting grooves 22 on the annular centrifugal plate 21, achieving rigid linkage between the annular buffer plate 15 and the annular centrifugal plate 21. At this time, the buffer on the annular buffer plate 15... Channel 17 is precisely aligned with the oil separation groove 24 on the annular centrifugal disc 21 to form a continuous inclined guide channel. When the high-pressure oil flows through this channel, it generates a tangential force, driving the annular buffer disc 15 and the annular centrifugal disc 21 to rotate synchronously at high speed. During the rotation, the centrifugal force is used to peel off the oil and impurities intercepted by the oil filter screen 23 from the surface of the filter screen and throw them into the impurity collection groove of the oil collection ring 14 in the oil discharge pipe 10, so as to achieve the centralized collection of impurities and prevent impurities from clogging the filter screen or flowing back to the pressure relief channel.

[0026] Fifth, the clean oil, after being buffered, depressurized, filtered, and purified, continues to flow along the oil discharge pipe 10 and smoothly flows into the low-pressure oil tank through the threaded quick-release interface 12, completing the entire pressure relief process. When the pressure in the injector pipeline drops below the safety threshold, the elastic force of the sealing reset spring 7 is greater than the oil pressure, pushing the safety sealing block 4 down along the sealing pipeline 5 to reset and re-fit tightly with the safety sealing valve 3, restoring the sealing state. The safety valve closes, and the injection system resumes normal operation. During this process, the annular buffer plate 15 resets under the elastic force of the pressure spring 20, the locking rod 16 disengages from the positioning connection groove 22, and the annular buffer plate 15 is decoupled from the annular centrifugal plate 21, returning to the initial standby position to prepare for the next possible overpressure relief.

[0027] The sixth step involves the staff dismantling the entire safety valve when the ship is docked or the engine is shut down for maintenance. They can simply rotate the quick-release connector 12 to disconnect the oil drain pipe 10 from the low-pressure oil tank, remove the oil sludge collection ring 14 located inside the oil drain pipe 10, and thoroughly clean the oil sludge and impurities collected in its collection tank. After cleaning, the oil sludge collection ring 14 is reinstalled, and the oil drain pipe 10 is reconnected to the low-pressure oil tank via the quick-release connector 12. This completes the maintenance operation, significantly simplifying the maintenance process and shortening maintenance time. It is particularly suitable for scenarios with limited maintenance conditions during long voyages. Furthermore, during maintenance, components such as the annular buffer plate 15, annular centrifugal plate 21, and oil sludge filter 23 can be visually inspected. If wear or damage is found, these components can be replaced individually, reducing maintenance costs.

[0028] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A self-resetting, new energy-sealed marine high-pressure fuel injector safety valve, comprising a safety valve housing (6), characterized in that: A safety sealing block (4) is slidably installed inside the safety valve housing (6). An annular buffer plate (15) is provided on the side of the safety sealing block (4). A buffer channel (17) is provided on the annular buffer plate (15). The buffer channel (17) is arranged in a ring with the annular buffer plate (15) as the center. An annular centrifugal plate (21) is provided on the side of the annular buffer plate (15). An oil stain filter screen (23) is fixedly installed on the surface of the annular centrifugal plate (21). The safety valve housing (6) is provided with a pressure buffer mechanism below. The pressure buffer mechanism can buffer the impact when the safety valve is first opened by the annular buffer plate (15) and the buffer channel (17) opened on it. When the oil impacts, it can guide the oil to flush the other parts of the safety valve and remove the internal oil stains and other deposits. The safety valve housing (6) is provided with a cleaning oil filter mechanism on the side. The cleaning oil filter mechanism can filter out impurities in the oil. When the oil impact force is too high, it converts the impact force into the rotation of the annular buffer plate (15) and the annular centrifugal plate (21) to throw out the oil stains filtered by the oil stain filter screen (23).

2. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 1, characterized in that, The pressure buffer mechanism includes an injector connection port (1), which is located at the lower end of the safety valve housing (6). The lower end of the injector connection port (1) is connected to the injection pipeline of the new energy engine injector. A safety valve seat (2) is fixedly installed inside the injector connection port (1).

3. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 2, characterized in that, A safety sealing valve (3) is fixedly installed above the safety valve seat (2), and a safety sealing block (4) is located above the safety sealing valve (3). The safety sealing valve (3) and the safety sealing block (4) form a sealing fit. A sealing pipeline (5) is fixedly installed inside the safety valve housing (6).

4. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 3, characterized in that, A sealing push rod (8) is fixedly installed on the upper end of the safety sealing block (4). A spring baffle is provided above the safety sealing block (4). The safety sealing block (4) and the sealing push rod (8) are slidably installed in the sealing pipeline (5). A safety valve top cover (9) is provided above the sealing pipeline (5). The other end of the sealing push rod (8) is slidably installed with the safety valve top cover (9).

5. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 4, characterized in that, The sealing push rod (8) is provided with a sealing return spring (7), which is located between the safety sealing block (4) and the safety valve top cover (9). The side of the injector connection port (1) is provided with an oil discharge pipe (10), and a quick-release interface (12) is fixedly installed on the oil discharge pipe (10) by threads. The other end of the quick-release interface (12) is connected to the low-pressure oil tank.

6. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 5, characterized in that, The annular buffer plate (15) is located inside the oil discharge pipe (10). A connecting rod (19) is fixedly installed on the annular buffer plate (15). A channel is opened at the center of the annular buffer plate (15). A one-way valve (13) is provided on the oil discharge pipe (10). A high-pressure flushing pipe (11) is provided on the one-way valve (13). The other end of the high-pressure flushing pipe (11) is connected to the safety valve housing (6).

7. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 6, characterized in that, The cleaning and filtering mechanism includes a locking top rod (16), an oil stain collection ring (14) is provided inside the oil discharge pipe (10), an impurity collection groove is provided inside the oil stain collection ring (14), the annular centrifugal plate (21) and the annular buffer plate (15) are rotatably installed inside the oil stain collection ring (14), and the locking top rod (16) is fixedly installed on the surface of the annular buffer plate (15).

8. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 7, characterized in that, The locking rod (16) is arranged in a ring around the center of the annular buffer plate (15). The locking rod (16) is located between the annular buffer plate (15) and the annular centrifugal plate (21). The annular centrifugal plate (21) is provided with a positioning connection groove (22).

9. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 8, characterized in that, The positioning connection groove (22) is opened at the position corresponding to the locking top rod (16), the annular buffer plate (15) is provided with a filter screen connection groove (18), one end of the connecting rod (19) is provided with a spring baffle, and the annular centrifugal plate (21) is provided with an oil separation groove (24).

10. The self-resetting new energy sealed marine high-pressure fuel injector safety valve as described in claim 9, characterized in that, A pressure spring (20) is installed on the connecting rod (19). The connecting rod (19) is slidably installed at the center of the annular centrifugal disc (21). A filter screen is provided at the center of the annular centrifugal disc (21).

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