A pressure reducing valve for safe filtering of cabin air in a long-distance ship

Abstract

The application belongs to the technical field of pressure reducing valves, and particularly relates to a pressure reducing valve for safe filtration of cabin airflow for ventilation of an ocean-going ship, which comprises a valve body, the inner wall of the valve body is provided with a valve cavity, the outer walls on the two sides of the valve cavity are provided with air inlet valve ports in communication with the valve cavity, the top outer wall of the valve body is provided with an air outlet valve port in communication with the inside of the valve cavity, the bottom outer wall of the valve body is fixedly provided with an accumulation cavity, the top inner cavity of the accumulation cavity is in communication with the bottom inner cavity of the valve cavity, the bottom inner wall of the accumulation cavity is fixedly provided with a bottom plate, the bottom outer wall of the bottom plate is provided with a discharge groove in communication with the inside of the accumulation cavity, and the bottom inner wall of the accumulation cavity is rotatably connected with an outer shunt pipe above the discharge groove, and the outer wall of the outer shunt pipe is movably attached with an annular float. By using the device, the filtration priority in the accumulation cavity can be adjusted, the impurities in the upper layer of oil stains can be normally discharged, and the safety hazard of wear of the valve body after long-time work can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of pressure reducing valve technology, specifically relating to a pressure reducing valve for safe airflow filtration in ventilation compartments of ocean-going vessels. Background Technology

[0002] A pressure reducing valve is a valve device that reduces the inlet pressure to a desired outlet pressure by adjustment, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself.

[0003] For example, the air compression filter pressure reducing valve disclosed in National Patent Publication No. CN117090973A includes: a valve body with an inlet end and an outlet end at both ends; a valve body fixed to the bottom of the valve body, and a valve bottom with an outlet fixed to the bottom of the valve body; a filter screen for filtering air fixed inside the valve body; a cleaning mechanism for cleaning dust on the outer wall of the filter screen, including a push plate that rotates due to the air pushed by the inlet end; a connecting block 1 fixed to the inner wall of the push plate; and the end of the connecting block 1 away from the push plate fixed to the outer wall of the rotating ring. The dust on the surface of the filter screen is cleaned by a brush plate, and the outer wall of the filter screen is knocked by the reciprocating push of a tapping plate, which helps to shake off the dust. At the same time, the knocking push of the tapping plate can flatten the wrinkles of the filter screen scraped by the brush plate, making the surface of the filter screen smoother and facilitating the cleaning of the filter screen surface. It is more convenient because the filter screen does not need to be disassembled for replacement or cleaning. After some of the excess water and oil impurities are discharged, the float position drops with the water level. Under the pull of spring two and the cooperation of gravity, the turntable moves down. The turntable drives the rubber plug to move down synchronously through the moving rod. The rubber plug is then inserted into the outlet again. Through the above design, it is beneficial to discharge excess water and oil impurities and avoid the accumulation of water and oil impurities that cause the water level to be too high and contaminate the filter screen.

[0004] However, traditional devices still have the following problems when in use: The water and oil impurity discharge of the above-mentioned filtration device can only be triggered at a certain water level, and a certain amount of water and oil impurities are discharged from the bottom outlet. However, due to the stratification of water and oil, the oil will float on the surface of the water. Each time a fixed amount is discharged, the water at the bottom will be discharged first, while the oil on the top layer will be difficult to discharge and will only accumulate more and more. Moreover, since the mass of different impurities is different and the filter screen is located on the top, some impurities will float on the surface of the water and oil, and it is also difficult to discharge them first from the bottom of the valve. The filtration priority is difficult to guarantee. After long-term operation, there is a safety hazard of wear on the valve. The device needs to be optimized. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a pressure reducing valve for safe airflow filtration in ventilation compartments of ocean-going vessels, which has the advantage of ensuring filtration priority within the valve, thereby reducing wear within the valve.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure reducing valve for airflow safety filtration in a ventilation compartment of an ocean-going vessel, comprising a valve body, characterized in that: a valve cavity is formed on the inner wall of the valve body; air inlet valves communicating with the valve cavity are formed on the outer walls of both sides of the valve cavity; an exhaust valve is formed on the outer wall of the top of the valve body communicating with the interior of the valve cavity; an accumulation chamber is fixedly installed on the outer wall of the bottom of the valve body; the top inner cavity of the accumulation chamber is connected to the bottom inner cavity of the valve cavity; a base plate is fixedly installed on the inner wall of the bottom of the accumulation chamber; a discharge groove communicating with the interior of the accumulation chamber is formed on the outer wall of the bottom of the base plate; an external diversion pipe is rotatably connected to the inner wall of the bottom of the accumulation chamber above the discharge groove; and an annular float is movably attached to the upper layer of the outer wall of the external diversion pipe, the annular float being made of lightweight PE plastic.

[0007] Preferably, an inner diversion pipe is fixedly connected to the bottom inner wall of the storage chamber above the discharge trough. The outer wall of the inner diversion pipe is movably fitted with the inner wall of the outer diversion pipe. Multiple diversion holes I connected to the inner wall are arrayed on the outer walls of the inner diversion pipe. Multiple diversion holes II connected to the inner wall are arrayed on the outer walls of the outer diversion pipe. The positions of the diversion holes I and the diversion holes II can correspond and coincide.

[0008] Preferably, a valve plug is movably fitted to the inner wall of the discharge trough, a main rod is fixedly connected to the top outer wall of the valve plug, a fastening head is fixedly connected to the top outer wall of the main rod, and support rods are fixedly connected to the outer walls of both sides of the fastening head. The outer walls of the two ends of the support rods away from the fastening head are respectively fixedly connected to the inner walls of the annular float.

[0009] Preferably, an upper valve plate is fixedly connected to the inner wall of the exhaust valve port. The upper valve plate has a connecting air hole 1 on its top outer wall that communicates with the bottom outer wall. A lower valve plate is provided on the bottom outer wall of the upper valve plate. The lower valve plate has a connecting air hole 2 on its bottom outer wall that communicates with the top outer wall. The positions of the connecting air hole 1 and the connecting air hole 2 are staggered. Multiple valve plates are provided in the cavity between the upper valve plate and the lower valve plate. A filter screen is fixedly connected to the bottom outer wall of the outermost valve plate.

[0010] Preferably, the valve plate has a downward-facing semi-circular cross-section, the bottom outer wall of the valve plate is in contact with the upper end wall of the second connecting vent, and the top outer wall of the valve plate is in contact with the bottom outer wall of the upper valve plate, but not with the lower end wall of the first connecting vent.

[0011] Preferably, an extension tube that is vertically connected is fixedly connected to the axial position of the upper valve plate, a connecting cover is fixedly connected to the top outer wall of the extension tube, and a fixing rod is fixedly installed at the axial position of the top outer wall of the lower valve plate, with the top outer wall of the fixing rod being fixedly connected to the bottom outer wall of the connecting cover.

[0012] Preferably, the outer wall of the fixing rod is movably sleeved with a connecting pipe, the outer wall of the connecting pipe is movably sleeved at the inner wall of the extension pipe, and multiple fixing brackets are fixedly connected to the bottom outer wall of the connecting pipe, and the fixing brackets are fixedly connected to multiple valve plates.

[0013] Preferably, an upper meshing toothed ring is fixedly connected to the upper end of the inner wall of the extension tube, a lower meshing toothed ring is fixedly connected to the lower end of the inner wall of the extension tube, and a middle adjusting toothed ring is fixedly connected to the outer wall of the connecting tube. The upper meshing teeth of the middle adjusting toothed ring mesh with the upper meshing toothed ring, and the lower meshing teeth of the middle adjusting toothed ring mesh with the lower meshing toothed ring. The meshing teeth of the upper and lower meshing toothed rings are at opposite angles, the vertical convex teeth on the upper and lower sides of the middle adjusting toothed ring have the same angle, and the distance between the upper and lower meshing toothed rings is equal to the distance between the upper and lower valve plates.

[0014] Preferably, the top two outer walls of the annular float have connecting holes that communicate with the bottom outer wall. The inner wall of the connecting hole slides against a limiting rod. The outer wall of the outer diversion pipe is fixedly connected to a pad. The top outer wall of the pad is movably fitted against the bottom outer wall of the annular float. The top outer wall of the pad is fixedly connected to the bottom outer wall of the two limiting rods. The bottom outer wall of the filter screen is fixedly connected to two limiting sleeves. The bottom inner wall of the limiting sleeve is movably sleeved with the top four outer walls of the limiting rods.

[0015] Preferably, a cleaning scraper is fixedly connected to the bottom outer wall of the lower valve plate, and one side of the outer wall of the cleaning scraper is movably attached to the outer wall of the filter screen.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the air pressure entering through the air inlets on both sides is discharged through the exhaust valve. The airflow passing through the exhaust valve passes through a filter screen to remove dust and most of the water and oil components, which gradually accumulate in the accumulation chamber awaiting discharge. As the water and oil components accumulate in the accumulation chamber over time, the water level rises. In this invention, the annular float is made of lightweight PE plastic and floats as the water level rises. Its mass ensures that the upper layer of the annular float is always above the water level. When the positions of the first and second diversion holes are staggered, a sealed space is formed around the outer diversion pipe, preventing water from completely penetrating into the outer diversion pipe at certain times, and instead pressing it tightly against the outer diversion pipe. The annular float on the outer wall of the flow tube is always above the water level. Therefore, when the annular float is pressed down and sinks, the upper layer of oil in the accumulation chamber will preferentially overflow from the upper end hole of the annular float into the outer diversion pipe, thereby achieving water-oil separation. The oil can be preferentially discharged from the discharge trough in the outer diversion pipe. When the positions of diversion hole one and diversion hole two coincide, the bottom of the outer diversion pipe will be connected, and the lower layer of water will rush into the outer diversion pipe, balancing the water pressure in the accumulation chamber. At this time, the lower layer of water will be preferentially discharged. Using this device, the filtration priority in the accumulation chamber can be adjusted, so that the impurities of the upper layer of oil can be discharged normally, avoiding the safety hazard of valve body wear after long-term operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a front view structural diagram of the present invention.

[0019] Figure 3 This is a front view schematic diagram of the internal structure of the valve cavity of the present invention.

[0020] Figure 4 This is a schematic diagram of the valve cavity structure of the present invention from the upper right direction.

[0021] Figure 5 This is a schematic diagram of the half-section front view of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the present invention in the upper right direction.

[0023] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.

[0024] Figure 8 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0025] Figure 9 This is a schematic diagram of the lower left section of the present invention.

[0026] Figure 10This is a schematic diagram of the upper valve plate structure of the present invention.

[0027] Figure 11 This is a schematic diagram of a half-section of the lower valve plate of the present invention.

[0028] In the diagram: 1. Valve body; 2. Valve chamber; 3. Inlet valve port; 4. Exhaust valve port; 5. Accumulation chamber; 6. Filter screen; 7. Base plate; 8. Annular float; 9. External diversion pipe; 10. Discharge trough; 11. Upper valve plate; 12. Connecting air hole one; 13. Lower valve plate; 14. Connecting air hole two; 15. Connecting pipe; 16. Fixing bracket; 17. Valve plate; 18. Extension pipe; 19. Connecting cover; 20. Fixing rod; 21. Upper meshing gear ring; 22. Lower meshing gear ring; 23. Middle adjusting gear ring; 24. Valve plug; 25. Pad; 26. Limiting rod; 27. Limiting sleeve; 28. Connecting hole; 29. ​​Main rod; 30. Fastening head; 31. Support rod; 32. Internal diversion pipe; 33. Diversion hole one; 34. Diversion hole two; 35. Cleaning scraper. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1, please refer to Figures 1 to 11This invention provides a technical solution: a pressure reducing valve for airflow safety filtration in a ventilation compartment of an ocean-going vessel, comprising a valve body 1, characterized in that: a valve cavity 2 is formed on the inner wall of the valve body 1; air inlet valve ports 3 are formed on both outer walls of the valve cavity 2 and communicate with the valve cavity 2; an exhaust valve port 4 is formed on the top outer wall of the valve body 1 and communicates with the interior of the valve cavity 2; an accumulation cavity 5 is fixedly installed on the bottom outer wall of the valve body 1; the top inner cavity of the accumulation cavity 5 communicates with the bottom inner cavity of the valve cavity 2; a bottom plate 7 is fixedly installed on the bottom inner wall of the accumulation cavity 5; a discharge groove 10 is formed on the bottom outer wall of the bottom plate 7 and communicates with the interior of the accumulation cavity 5; an external diversion pipe 9 is rotatably connected above the discharge groove 10 on the bottom inner wall of the accumulation cavity 5; an annular float 8 is movably attached to the upper layer of the outer wall of the external diversion pipe 9; the annular float 8 is made of lightweight PE. Made of plastic, the bottom inner wall of the storage chamber 5 is fixedly connected to an inner diversion pipe 32 above the discharge trough 10. The outer wall of the inner diversion pipe 32 is movably fitted to the inner wall of the outer diversion pipe 9. Multiple diversion holes 1 33 connected to the inner wall are arrayed on the outer wall of the inner diversion pipe 32. Multiple diversion holes 2 34 connected to the inner wall are arrayed on the outer wall of the outer diversion pipe 9. The positions of the diversion holes 1 33 and the diversion holes 2 34 can correspond and coincide. A valve plug 24 is movably fitted to the inner wall of the discharge trough 10. A main rod 29 is fixedly connected to the top outer wall of the valve plug 24. A fastening head 30 is fixedly connected to the top outer wall of the main rod 29. Support rods 31 are fixedly connected to the outer walls of both sides of the fastening head 30. The outer walls of the two ends of the support rods 31 away from the fastening head 30 are fixedly connected to the inner walls of the annular float 8.

[0031] In this invention, the air pressure discharged from the air inlets 3 on both sides is discharged through the exhaust valve 4. The airflow passing through the exhaust valve 4 is filtered by the filter screen 6 to remove dust and most of the water and oil components in the airflow, and gradually accumulates in the accumulation chamber 5 to await discharge. As the water and oil components in the accumulation chamber 5 gradually accumulate over time, the water level rises. In this invention, the annular float 8 is made of lightweight PE plastic and floats as the water level rises. Its mass ensures that the upper layer of the annular float 8 is always higher than the horizontal plane. When the positions of the diversion holes 1 33 and 2 34 are staggered, a sealed space is formed around the outer diversion pipe 9, preventing water from completely penetrating into the outer diversion pipe 9 for a period of time, and instead pressing it tightly against the outer diversion pipe. The annular float 8 on the outer wall of the 9th layer is always above the water level. Therefore, when the annular float 8 is pressed down and sinks, the upper layer of oil in the storage chamber 5 will preferentially overflow from the upper end hole of the annular float 8 into the outer diversion pipe 9, thereby achieving water-oil separation. The oil can be preferentially discharged from the discharge trough 10 in the outer diversion pipe 9. When the positions of the diversion hole 1 33 and the diversion hole 2 34 coincide, the bottom of the outer diversion pipe 9 will be connected, and the lower layer of water will rush into the outer diversion pipe 9, so that the water pressure in the storage chamber 5 is balanced. At this time, the lower layer of water will be preferentially discharged. Using this device, the filtration priority in the storage chamber 5 can be adjusted, so that the impurities of the upper layer of oil can be discharged normally, avoiding the safety hazard of wear on the valve body 1 after long-term operation.

[0032] In Embodiment 2, based on Embodiment 1, an upper valve plate 11 is fixedly connected to the inner wall of the exhaust valve port 4. The top outer wall of the upper valve plate 11 has a connecting vent hole 12 that communicates with the bottom outer wall. A lower valve plate 13 is provided on the bottom outer wall of the upper valve plate 11. The bottom outer wall of the lower valve plate 13 has a connecting vent hole 14 that communicates with the top outer wall. The positions of the connecting vent hole 12 and the connecting vent hole 14 are staggered. Multiple valve plates 17 are arranged in the cavity between the upper valve plate 11 and the lower valve plate 13, with the outermost valve... A filter screen 6 is fixedly connected to the bottom outer wall of valve plate 17. The cross-section of valve plate 17 is a downward-facing semi-circular arc. The bottom outer wall of valve plate 17 is in contact with the upper end wall of the connecting vent 14, and the top outer wall of valve plate 17 is in contact with the bottom outer wall of upper valve plate 11, but not with the lower end wall of connecting vent 12. An extension tube 18 that connects vertically is fixedly connected to the axial position of upper valve plate 11. A connecting cover 19 is fixedly connected to the top outer wall of extension tube 18. A filter screen 6 is fixedly installed at the axial position of the top outer wall of lower valve plate 13. A fixing rod 20 is fixedly connected to the top outer wall of a connecting cover 19. A connecting pipe 15 is movably sleeved on the outer wall of the fixing rod 20. The outer wall of the connecting pipe 15 is movably sleeved on the inner wall of the extension pipe 18. Multiple fixing brackets 16 are fixedly connected to the bottom outer wall of the connecting pipe 15. The fixing brackets 16 are fixedly connected to multiple valve plates 17. An upper meshing toothed ring 21 is fixedly connected to the upper end of the inner wall of the extension pipe 18, and a lower meshing toothed ring 22 is fixedly connected to the lower end of the inner wall of the extension pipe 18. The outer wall is fixedly connected to a middle layer adjusting gear ring 23. The upper meshing teeth of the middle layer adjusting gear ring 23 mesh with the upper meshing gear ring 21, and the lower meshing teeth of the middle layer adjusting gear ring 23 mesh with the lower meshing gear ring 22. The meshing teeth of the upper meshing gear ring 21 and the meshing teeth of the lower meshing gear ring 22 are at opposite angles. The vertical convex teeth on the upper and lower sides of the middle layer adjusting gear ring 23 have the same angle. The distance between the upper meshing gear ring 21 and the lower meshing gear ring 22 is equal to the distance between the upper valve plate 11 and the lower valve plate 13.

[0033] In this invention, valve plate 17 is pressed against the lower valve plate 13 by gravity, causing the second connecting vent 14 to achieve a sealed compartment state. Airflow cannot normally enter the ship from the inlet valve 3 through the outlet valve 4. When a negative pressure state occurs inside the ship, i.e., the internal and external pressures are unbalanced, the pressure generated by this negative pressure state will cause a stronger surge of external airflow. At this time, the high-speed airflow will push valve plate 17, causing it to move upwards and adhere to the bottom of the upper valve plate 11. Airflow enters through the second connecting vent 14 and exits through the first connecting vent 12 into the ship, thereby achieving pressure regulation inside the ship. When the pressure decreases, valve plate 17 falls back down and adheres to the lower valve plate 13. The reciprocating movement will cause the filter screen 6, which is fixedly connected to the valve plate 17, to move synchronously and vertically. When the filter screen 6 falls, the limiting sleeve 27 below the filter screen 6 will hit the top outer wall of the annular float 8, thereby causing the annular float 8 to move vertically in a small amplitude. This movement process will cause the upper oil film in the accumulation chamber 5 to overflow into the outer diversion pipe 9 in multiple stages. This process can make the water level line present a continuous multi-stage axial flow attraction. Compared with the traditional single overflow effect, the single overflow effect achieved by this invention can more effectively make the impurities floating on the oil surface overflow into the outer diversion pipe 9 and be discharged, thereby improving the screening effect of this invention.

[0034] In Example 3, based on Example 2, the outer walls of the top two sides of the annular float 8 are provided with connecting holes 28 that communicate with the bottom outer wall. The inner wall of the connecting hole 28 is slidably fitted with a limiting rod 26. The outer wall of the outer diversion pipe 9 is fixedly connected with a pad 25. The top outer wall of the pad 25 is movably fitted with the bottom outer wall of the annular float 8. The top outer wall of the pad 25 is fixedly connected with the bottom outer wall of the two limiting rods 26. The bottom outer wall of the filter screen 6 is fixedly connected with two limiting sleeves 27. The bottom inner wall of the limiting sleeve 27 is movably fitted with the top four outer walls of the limiting rods 26. The bottom outer wall of the lower valve plate 13 is fixedly connected with a cleaning scraper 35. One side outer wall of the cleaning scraper 35 is movably fitted with the outer wall of the filter screen 6.

[0035] In this invention, when the valve plate 17 moves upward, it drives the middle adjusting gear ring 23 to move from the engagement position of the lower engaging gear ring 22 to the engagement position of the upper engaging gear ring 21 via the connecting pipe 15. Since the engagement teeth of the upper engaging gear ring 21 and the lower engaging gear ring 22 are at opposite angles, and the vertical convex teeth on both sides of the middle adjusting gear ring 23 have the same angle, the middle adjusting gear ring 23 will experience a small sliding offset when it moves upward and engages with the upper engaging gear ring 21. This causes the valve plate 17 and the filter screen 6 to maintain a small deflection around the axis. Furthermore, the filter screen 6 connected to the valve plate 17 drives the limiting rod 26 and the outer diversion pipe 9 to move in the same direction via the limiting sleeve 27. The rotation of the outer diversion pipe 9 causes the positions of the diversion holes 33 and 34 to repeatedly alternate and close, thereby achieving the phased accumulation and discharge of water and oil. When the annular float 8 rises to the top of the accumulation chamber 5 as the water level rises, its buoyancy will drive the valve plug 24 to rise and be pulled out through the main rod 29, so that the discharge trough 10 is in a flowing state to discharge water and oil. In this invention, the pressure of the ocean wind and the negative pressure generated by the movement of the ship can drive the valve plate 17 and its linkage device to operate normally. At the same time, the reciprocating deflection of the filter screen 6 allows the cleaning scraper 35 to continuously clean the dust and impurities attached to the outer wall of the filter screen 6, ensuring the unobstructed flow of the filter holes.

[0036] The working principle and usage process of this invention: In this invention, the air pressure discharged from the air inlet valves 3 on both sides is discharged through the exhaust valve 4. The airflow passing through the exhaust valve 4 will be filtered by the filter screen 6 to remove dust and most of the water and oil components in the airflow, and gradually accumulate in the accumulation chamber 5 to wait for discharge. As the water and oil components in the accumulation chamber 5 gradually accumulate over time, the water level rises. In this invention, the annular float 8 is made of lightweight PE plastic material and floats as the water level rises. Its mass ensures that the upper layer of the annular float 8 is always higher than the horizontal plane. When the positions of the diversion holes 1 33 and 2 34 are staggered, a sealed space is formed around the outer diversion pipe 9. Water cannot completely penetrate into the outer diversion pipe 9 for a period of time, and is tightly pressed against the outer wall of the outer diversion pipe 9. The annular float 8 is always above the water level. Therefore, when the annular float 8 is pressed down and sinks, the upper layer of oil in the accumulation chamber 5 will preferentially overflow from the upper end hole of the annular float 8 into the outer diversion pipe 9, thereby achieving water-oil separation. The oil can be preferentially discharged from the discharge trough 10 in the outer diversion pipe 9. When the positions of the first diversion hole 33 and the second diversion hole 34 coincide, the bottom of the outer diversion pipe 9 will be connected, and the lower layer of water will rush into the outer diversion pipe 9, balancing the water pressure in the accumulation chamber 5. At this time, the lower layer of water will be preferentially discharged. Using this device, the filtration priority in the accumulation chamber 5 can be adjusted, allowing the impurities of the upper layer of oil to be discharged normally, avoiding the safety hazard of wear on the valve body 1 after long-term operation. In this invention, the valve plate 17 is pressed on the lower valve plate 13 by natural gravity. This allows the connecting vent 2 14 to achieve a sealed compartment state, preventing airflow from normally entering the ship from the inlet valve 3 through the exhaust valve 4. When a negative pressure state occurs inside the ship, i.e., the internal and external pressures are unbalanced, the pressure generated by this negative pressure state will cause a stronger surge of external airflow. At this time, the high-speed airflow will push the valve plate 17, causing the valve plate 17 to move upward and adhere to the bottom of the upper valve plate 11. Airflow enters from the connecting vent 2 14 and exits into the ship through the connecting vent 1 12, thereby achieving pressure regulation inside the ship. When the pressure decreases, the valve plate 17 falls back and adheres to the lower valve plate 13. This pressurized reciprocating movement will cause the filter screen 6, which is fixedly connected to the valve plate 17, to move synchronously and vertically. When the filter screen 6 falls, the limiting sleeve 27 below the filter screen 6 will hit the annular... The top outer wall of the float 8 causes the annular float 8 to move vertically in a small-amplitude reciprocating motion. This movement causes the upper oil film in the accumulation chamber 5 to overflow into the outer diversion pipe 9 in multiple stages. This process can make the water level line present a continuous multi-stage axial flow attraction. Compared with the traditional single overflow effect, the single overflow effect achieved by this invention can more effectively make the impurities floating on the oil surface overflow into the outer diversion pipe 9 for discharge, thereby improving the screening effect of this invention. In this invention, when the valve plate 17 moves upward, it will drive the middle layer adjusting tooth ring 23 to move from the meshing position of the lower meshing tooth ring 22 to the meshing position of the upper meshing tooth ring 21 through the connecting pipe 15. Since the meshing teeth of the upper meshing tooth ring 21 and the meshing teeth of the lower meshing tooth ring 22 are at opposite angles,The vertical convex teeth on both the upper and lower sides of the middle layer adjusting gear ring 23 have the same angle, causing a small sliding offset when the middle layer adjusting gear ring 23 moves upward and engages with the upper layer meshing gear ring 21. This causes the valve plate 17 and the filter screen 6 to make a small deflection movement around the axis. Furthermore, the filter screen 6 connected to the valve plate 17 drives the limiting rod 26 and the outer diversion pipe 9 to rotate synchronously through the limiting sleeve 27. The rotation of the outer diversion pipe 9 causes the positions of the diversion hole 1 33 and the diversion hole 2 34 to repeatedly appear in an alternating and closed state, thereby realizing water... The oil is accumulated and discharged in stages. When the annular float 8 rises to the top of the accumulation chamber 5 as the water level rises, its buoyancy drives the valve plug 24 to rise and be pulled out through the main rod 29, allowing the discharge trough 10 to flow and discharge water and oil. In this invention, the pressure of the ocean current and the negative pressure generated by the movement of the ship can drive the normal operation of the valve plate 17 and its linkage device. At the same time, the reciprocating deflection of the filter screen 6 allows the cleaning scraper 35 to continuously clean the dust and impurities adhering to the outer wall of the filter screen 6, ensuring the unobstructed flow of the filter holes.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel, comprising a valve body (1), characterized in that: The valve body (1) has a valve cavity (2) on its inner wall. The valve cavity (2) has an air inlet (3) on both outer walls that communicate with the valve cavity (2). The valve body (1) has an exhaust valve (4) on its top outer wall that communicates with the inside of the valve cavity (2). The valve body (1) has a storage cavity (5) fixedly installed on its bottom outer wall. The top inner cavity of the storage cavity (5) communicates with the bottom inner cavity of the valve cavity (2). The storage cavity (5) has a bottom plate (7) fixedly installed on its bottom inner wall. The bottom outer wall of the bottom plate (7) has an air inlet (3) on its bottom outer wall. There is a discharge trough (10) connected to the inside of the storage chamber (5). The bottom inner wall of the storage chamber (5) is rotatably connected to an external diversion pipe (9) above the discharge trough (10). An annular float (8) is movably attached to the upper layer of the outer wall of the external diversion pipe (9). The annular float (8) is made of lightweight PE plastic. An upper valve plate (11) is fixedly connected to the inner wall of the exhaust valve port (4). A connecting air hole (12) is opened on the top outer wall of the upper valve plate (11) and connected to the bottom outer wall. The bottom outer wall of the float is provided with a lower valve plate (13). The bottom outer wall of the lower valve plate (13) is provided with a connecting air hole 2 (14) that communicates with the top outer wall. The positions of the connecting air hole 1 (12) and the connecting air hole 2 (14) are staggered. Multiple valve plates (17) are provided in the cavity between the upper valve plate (11) and the lower valve plate (13). The bottom outer wall of the outermost valve plate (17) is fixedly connected with a filter screen (6). The top two outer walls of the annular float (8) are provided with connecting holes (28) that communicate with the bottom outer wall. The inner wall of the connecting hole (28) is slidably fitted with the limiting rod (26), the outer wall of the outer diversion pipe (9) is fixedly connected with a pad (25), the top outer wall of the pad (25) is movably fitted with the bottom outer wall of the annular float (8), the top outer wall of the pad (25) is fixedly connected with the bottom outer wall of the two limiting rods (26), the bottom outer wall of the filter screen (6) is fixedly connected with two limiting sleeves (27), and the bottom inner wall of the limiting sleeve (27) is movably fitted with the top four outer walls of the limiting rod (26).

2. The pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel according to claim 1, characterized in that: The bottom inner wall of the storage chamber (5) is fixedly connected to the discharge trough (10) with an inner diversion pipe (32). The outer wall of the inner diversion pipe (32) is movably attached to the inner wall of the outer diversion pipe (9). The outer wall of the inner diversion pipe (32) is arrayed with multiple diversion holes 1 (33) that communicate with the inner wall. The outer wall of the outer diversion pipe (9) is arrayed with multiple diversion holes 2 (34) that communicate with the inner wall. The positions of the diversion holes 1 (33) and the diversion holes 2 (34) can correspond to each other.

3. A pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel according to claim 1, characterized in that: The inner wall of the discharge trough (10) is movably fitted with a valve plug (24). The top outer wall of the valve plug (24) is fixedly connected to a main rod (29). The top outer wall of the main rod (29) is fixedly connected to a fastening head (30). The outer walls on both sides of the fastening head (30) are fixedly connected to support rods (31). The outer walls at both ends of the support rods (31) away from the fastening head (30) are fixedly connected to the inner walls on both sides of the annular float (8).

4. A pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel according to claim 1, characterized in that: The valve plate (17) has a downward semi-circular cross-section. The bottom outer wall of the valve plate (17) is in contact with the upper end wall of the connecting air hole two (14). The top outer wall of the valve plate (17) is in contact with the bottom outer wall of the upper valve plate (11) and is not in contact with the lower end wall of the connecting air hole one (12).

5. A pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel according to claim 4, characterized in that: An extension tube (18) is fixedly connected to the axial position of the upper valve plate (11), and a connecting cover (19) is fixedly connected to the top outer wall of the extension tube (18). A fixing rod (20) is fixedly installed at the axial position of the top outer wall of the lower valve plate (13), and the top outer wall of the fixing rod (20) is fixedly connected to the bottom outer wall of the connecting cover (19).

6. A pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel according to claim 5, characterized in that: The outer wall of the fixed rod (20) is movably sleeved with a connecting pipe (15), the outer wall of the connecting pipe (15) is movably sleeved on the inner wall of the extension pipe (18), and multiple fixing brackets (16) are fixedly connected to the bottom outer wall of the connecting pipe (15), and the fixing brackets (16) are fixedly connected to multiple valve plates (17).

7. A pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel according to claim 6, characterized in that: The upper end of the inner wall of the extension tube (18) is fixedly connected to an upper meshing tooth ring (21), the lower end of the inner wall of the extension tube (18) is fixedly connected to a lower meshing tooth ring (22), and the outer wall of the connecting tube (15) is fixedly connected to a middle adjusting tooth ring (23). The upper meshing teeth of the middle adjusting tooth ring (23) mesh with the upper meshing tooth ring (21), the lower meshing teeth of the middle adjusting tooth ring (23) mesh with the lower meshing tooth ring (22), the meshing teeth of the upper meshing tooth ring (21) and the meshing teeth of the lower meshing tooth ring (22) are at opposite angles, the vertical convex teeth on the upper and lower sides of the middle adjusting tooth ring (23) have the same angle, and the distance between the upper meshing tooth ring (21) and the lower meshing tooth ring (22) is equal to the distance between the upper valve plate (11) and the lower valve plate (13).

8. A pressure reducing valve for safe airflow filtration in a ventilation compartment of an ocean-going vessel according to claim 1, characterized in that: A cleaning scraper (35) is fixedly connected around the bottom outer wall of the lower valve plate (13), and one side of the outer wall of the cleaning scraper (35) is movably attached to the outer wall of the filter screen (6).

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