A control valve for regulating the pressure of a cabin of a marine ventilation system

Abstract

The application relates to the technical field of control valves, in particular to a control valve for cabin pressure regulation of a ship ventilation system, which comprises a butterfly valve body, the inner wall of the butterfly valve body is fixedly connected with a rectifier grid, the outer wall of the top of the butterfly valve body is fixedly connected with an equipment shell, the outer wall of one side of the equipment shell is fixedly connected with a motor, the inside of the equipment shell is rotationally connected with a valve rod, the outer wall of the valve rod is fixedly connected with a valve plate, the outer wall of the valve plate is provided with a mounting groove, and the inside of the mounting groove is movably connected with a sealing strip. When the soft magnetic ring frame moves to the inside of the mounting groove, the sealing strip moves simultaneously, the sealing strip is kept in contact with the inner wall of the butterfly valve body when the valve plate rotates in the butterfly valve body, thereby increasing the friction between the sealing strip and the inner wall of the butterfly valve body, the sealing strip enters the inside of the mounting groove correspondingly, the abrasion of the sealing strip is reduced, the sealing effect of the sealing strip is prevented from being reduced, and the service life of the sealing strip is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of control valve technology, specifically relating to a control valve for regulating the air pressure of a compartment in a ship ventilation system. Background Technology

[0002] The compartment pressure regulating control valve for marine ventilation systems is an automated valve device specifically designed for the marine environment. Its core function is to balance and control the air pressure between different compartments (such as engine room, cargo hold, living quarters, etc.) of the ship by regulating the airflow or air pressure in the ventilation duct, thereby ensuring the safety of ship operation, the comfort of personnel, and the normal operation of equipment.

[0003] However, traditional devices still have the following problems when in use: In the existing technology, the air pressure regulation between compartments mainly relies on butterfly valves. The butterfly valve achieves the sealing of the valve body through the cooperation of the valve plate and the sealing strip. When it is opened, the driving device drives the valve plate to rotate in the valve body to release the passage. However, during the opening and closing of the valve plate, there will be continuous friction between the sealing strip on its outer periphery and the inner wall of the valve body, which can easily cause the sealing strip to wear, affect the sealing effect and shorten its service life. Therefore, we need a control valve for regulating the air pressure of the compartment in a ship's ventilation system to solve the problem of friction caused by the sealing strip when it rotates, and to reduce the friction of the sealing strip when it rotates. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a control valve for regulating the air pressure of a compartment in a ship ventilation system, which has the advantage of reducing friction of the sealing strip during rotation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a control valve for regulating the air pressure of a ship's ventilation system, comprising a butterfly valve body, a flow rectifier grid fixedly connected to the inner wall of the butterfly valve body, an equipment housing fixedly connected to the outer wall of the top of the butterfly valve body, a motor fixedly connected to the outer wall of one side of the equipment housing, a valve stem rotatably connected inside the equipment housing, a valve plate fixedly connected to the outer wall of the valve stem, an installation groove provided on the outer wall of the valve plate, a sealing strip movably connected inside the installation groove, an anti-wear mechanism provided on the outer wall of the sealing strip, the anti-wear mechanism including a soft magnetic ring frame, the interior of the soft magnetic ring frame being fixedly connected to the outer wall of the sealing strip, and the outer wall of the soft magnetic ring frame being in movable contact with the interior of the installation groove.

[0006] Preferably, the inner wall of the butterfly valve body has a second groove at the position of the sealing strip, and a strong magnetic ring is fixedly connected to the inner wall of the second groove. The inner wall of the strong magnetic ring and the outer wall of the soft magnetic ring frame are attracted to each other by opposite poles.

[0007] Preferably, a reset spring three is fixedly connected to the inner wall of the soft magnetic ring frame, and the outer wall of one end of the reset spring three is fixedly connected to the inner wall of the mounting groove. A certain gap is left between the two ends of the soft magnetic ring frame and the two ends of the mounting groove.

[0008] Preferably, the valve plate has vent holes that are connected to the outer walls on both sides, and the vent holes are in contact with a sealing plate.

[0009] Preferably, the valve plate has a sliding groove inside, the outer wall of one end of the sliding groove is connected through the inside of the mounting groove, the inside of the sliding groove is slidably connected to the outer wall of the sealing plate, a second return spring is fixedly connected to the outer wall of one end of the sealing plate, the outer wall of one end of the second return spring is fixedly connected to the inner wall of the sliding groove, and the outer wall of the other end of the sealing plate is in movable contact with the inner ring wall of the soft magnetic ring frame.

[0010] Preferably, a telescopic shell is fixedly connected inside the mounting groove, a discharge pipe is fixedly connected to the outer wall of one end of the telescopic shell, a circular hole is opened on the outer wall of the soft magnetic ring frame, the inside of the circular hole is fixedly connected to the outer wall of the discharge pipe, and a micropore is opened on the outer wall of the sealing strip at the position of the circular hole.

[0011] Preferably, a worm gear is fixedly connected to the outer wall of the top of the valve stem, a worm is meshed with the outer wall of the worm gear, and support rods are rotatably connected to the outer walls of both ends of the worm. The outer wall of the bottom of the support rod is fixedly connected to the lower part of the inner wall of the equipment housing.

[0012] Preferably, the worm gear has a groove inside, a force-bearing rod is slidably connected inside the worm gear, a handle is fixedly connected to the outer wall of one end of the force-bearing rod through the inside of the equipment housing, and a protruding strip is fixedly connected to the outer wall of the force-bearing rod, the outer wall of the protruding strip is slidably connected to the inside of the groove.

[0013] Preferably, the output end of the motor is fixedly connected to a main shaft, the main shaft has a cavity inside, a limit plate is fixedly connected to the inner wall of the cavity, a mounting plate is rotatably connected to the inside of the cavity, a return spring is fixedly connected to the outer wall of one end of the mounting plate, and a memory-shaped plate is fixedly connected to the outer wall of one end of the return spring.

[0014] Preferably, the outer wall of one side of the memory-shaped piece is in movable contact with the outer wall of one side of the limiting plate, and the outer wall of one side of the memory-shaped piece is fixedly connected to the outer wall of the other end of the force-bearing rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: As the soft magnetic ring moves into the mounting groove, the sealing strip moves accordingly. This prevents the sealing strip from constantly contacting the inner wall of the butterfly valve body when the valve plate rotates inside the butterfly valve body. This increases the friction between the sealing strip and the inner wall of the butterfly valve body, allowing the sealing strip to enter the mounting groove, reducing wear on the sealing strip, preventing a decrease in the sealing effect, and extending the service life of the sealing strip. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the rectifier grid structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the butterfly valve body structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of the device housing of the present invention.

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0020] Figure 5 This is a schematic diagram of the mounting plate structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the second groove structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the valve plate structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the internal structure of the mounting slot of the present invention.

[0024] Figure 9 This is a schematic cross-sectional view of the valve plate of the present invention.

[0025] Figure 10 for Figure 9 Enlarged structural diagram at point B.

[0026] Figure 11 This is a schematic diagram of the microporous structure of the present invention.

[0027] Figure 12 This is a schematic diagram of the circular hole structure of the present invention.

[0028] Figure 13 This is a schematic diagram of the telescopic shell structure of the present invention.

[0029] In the diagram: 1. Butterfly valve body; 11. Equipment housing; 12. Rectifier grid; 13. Motor; 131. Worm gear; 132. Worm; 133. Valve stem; 134. Main shaft; 14. Valve plate; 2. Handle; 21. Force rod; 22. Groove one; 23. Limiting plate; 24. Memory shape plate; 25. Return spring one; 26. Mounting plate; 3. Groove two; 31. Strong magnetic ring; 32. Mounting groove; 33. Sealing strip; 34. Soft magnetic ring frame; 35. Return spring three; 4. Vent hole; 41. Sealing plate; 42. Slide groove; 43. Return spring two; 5. Telescopic shell; 51. Micro-hole; 52. Round hole; 53. Discharge pipe. Detailed Implementation

[0030] 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.

[0031] Example 1, please refer to Figures 1 to 13 This invention provides a technical solution for a control valve for regulating the air pressure of a ship's ventilation system: It includes a butterfly valve body 1, a flow rectifier 12 fixedly connected to the inner wall of the butterfly valve body 1, an equipment housing 11 fixedly connected to the outer wall of the top of the butterfly valve body 1, a motor 13 fixedly connected to the outer wall of one side of the equipment housing 11, a valve stem 133 rotatably connected inside the equipment housing 11, a valve plate 14 fixedly connected to the outer wall of the valve stem 133, and an installation groove 32 formed on the outer wall of the valve plate 14. The installation groove 32 is movably connected to... The sealing strip 33 has an anti-wear mechanism on its outer wall. The anti-wear mechanism includes a soft magnetic ring frame 34. The inside of the soft magnetic ring frame 34 is fixedly connected to the outer wall of the sealing strip 33. The outer wall of the soft magnetic ring frame 34 is in movable contact with the inside of the mounting groove 32. The outer wall of the top of the valve stem 133 is fixedly connected to a worm gear 131. The outer wall of the worm gear 131 is meshed with a worm 132. The outer walls of both ends of the worm 132 are rotatably connected to support rods. The outer wall of the bottom of the support rod is fixedly connected to the bottom of the inner wall of the equipment housing 11.

[0032] Since the motor 13 has system control functions, operators can easily remotely control the opening and closing of the butterfly valve body 1, avoiding the need for operators to run to the butterfly valve body 1 for manual operation. The opening and closing of the butterfly valve body 1 can be controlled remotely, increasing the convenience of the operator in operating the butterfly valve body 1.

[0033] In Example 2, based on Example 1, a groove 2 3 is provided on the inner wall of the butterfly valve body 1 at the position of the sealing strip 33. A strong magnetic ring 31 is fixedly connected to the inner wall of the groove 2 3. The inner wall of the strong magnetic ring 31 and the outer wall of the soft magnetic ring frame 34 are attracted to each other by opposite poles. A return spring 35 is fixedly connected to the inner wall of the soft magnetic ring frame 34. The outer wall of one end of the return spring 35 is fixedly connected to the inner wall of the mounting groove 32. A certain gap is left between the two ends of the soft magnetic ring frame 34 and the two ends of the mounting groove 32.

[0034] As the soft magnetic ring 34 moves into the mounting groove 32, the sealing strip 33 moves accordingly. This prevents the sealing strip 33 from always contacting the inner wall of the butterfly valve body 1 when the valve plate 14 rotates inside the butterfly valve body 1. This increases the friction between the sealing strip 33 and the inner wall of the butterfly valve body 1. Consequently, the sealing strip 33 enters the mounting groove 32 through the mounting groove 32, reducing the wear of the sealing strip 33, preventing a decrease in the sealing effect of the sealing strip 33, and extending the service life of the sealing strip 33.

[0035] In Example 3, based on Example 2, the valve plate 14 has a vent hole 4 with two outer walls connected to each other. The vent hole 4 has a sealing plate 41 in contact with the inside. The valve plate 14 has a sliding groove 42 inside. The outer wall of one end of the sliding groove 42 is connected to the inside of the mounting groove 32. The inside of the sliding groove 42 is slidably connected to the outer wall of the sealing plate 41. A second return spring 43 is fixedly connected to the outer wall of one end of the sealing plate 41. The outer wall of one end of the second return spring 43 is fixedly connected to the inner wall of the sliding groove 42. The outer wall of the other end of the sealing plate 41 is in contact with the inner wall of the soft magnetic ring frame 34.

[0036] By setting the vent hole 4, the valve plate 14 can be stably fixed inside the butterfly valve body 1 when the opening angle is not ninety degrees, reducing the impact force of airflow on the valve plate 14, thereby reducing the risk of cracks at the connection due to excessive force, and protecting the connection structure between the valve plate 14 and the valve stem 133. At the same time, during the closing process, the presence of the vent hole 4 balances the air pressure on both sides of the valve plate 14, reducing the aerodynamic resistance encountered by the valve plate 14 when closing, thereby reducing the aerodynamic load on the valve plate 14 during the closing process. This not only makes the valve plate 14 close more smoothly, but also reduces the impact on the valve plate 14 and related components during the closing process, improving the stability and reliability of the closing process.

[0037] In Example 4, based on Example 2, a telescopic shell 5 is fixedly connected inside the mounting groove 32, and a discharge pipe 53 is fixedly connected to the outer wall of one end of the telescopic shell 5. A round hole 52 is opened on the outer wall of the soft magnetic ring frame 34, and the inside of the round hole 52 is fixedly connected to the outer wall of the discharge pipe 53. A micro hole 51 is opened on the outer wall of the sealing strip 33 at the position of the round hole 52.

[0038] The antioxidant opens the micropores 51 on the sealing strip 33 through the discharge pipe 53, allowing the antioxidant to flow from the micropores 51 to the outer wall of the sealing strip 33. This maintains the outer wall of the sealing strip 33 and prevents it from cracking due to prolonged use, which would affect the sealing effect of the sealing strip 33. Correspondingly, by adding antioxidant to the inside of the sealing strip 33 when the valve plate 14 is opened, the sealing strip 33 is nourished and protected, effectively preventing the outer wall from cracking and maintaining the good performance of the sealing strip 33.

[0039] In Example 5, based on Example 1, a groove 22 is provided inside the worm gear 132, and a force-bearing rod 21 is slidably connected inside the worm gear 132. A handle 2 is fixedly connected to the outer wall of one end of the force-bearing rod 21 through the interior of the equipment housing 11. A protruding strip is fixedly connected to the outer wall of the force-bearing rod 21, and the outer wall of the protruding strip is slidably connected to the interior of the groove 22. A main shaft 134 is fixedly connected to the output end of the motor 13. A cavity is provided inside the main shaft 134, and a limit plate 23 is fixedly connected to the inner wall of the cavity. A mounting plate 26 is rotatably connected inside the cavity. A return spring 25 is fixedly connected to the outer wall of one end of the mounting plate 26, and a memory-shaped piece 24 is fixedly connected to the outer wall of one end of the return spring 25. The outer wall of one side of the memory-shaped piece 24 is in movable contact with the outer wall of one side of the limit plate 23, and the outer wall of one side of the memory-shaped piece 24 is fixedly connected to the outer wall of the other end of the force-bearing rod 21.

[0040] By moving the handle 2, the force rod 21 can drive the worm gear 132 to move, thereby controlling the valve plate 14 to open or close. This avoids the inability to open or close the valve plate 14 through the system cabinet in the event of a fire or power outage, ensuring that the ship's ventilation system can still be effectively regulated in emergency situations, maintaining or adjusting the air pressure in the compartments, providing the necessary ventilation conditions for emergency operations such as personnel evacuation and fire fighting, and ensuring the safety of the ship.

[0041] The working principle and usage process of this invention are as follows: During operation, firstly, the motor 13 is started. Because a limiting hole is provided on the main shaft 134, and this hole is movably connected to the protrusion on the force-bearing rod 21, the force-bearing rod 21 cannot rotate inside the main shaft 134. Then, through the operation of the motor 13, the main shaft 134 drives the force-bearing rod 21 to rotate. Furthermore, due to the connection between the protrusion on the force-bearing rod 21 and the groove 22, as the force-bearing rod 21 rotates, the protrusion drives the worm gear 132 to rotate accordingly. Due to the meshing connection between the worm gear 132 and the worm wheel 131, the worm gear… As motor 132 rotates, worm gear 131 rotates accordingly. The rotation of worm gear 131 then causes valve stem 133 to drive valve plate 14 to rotate, thereby controlling the opening or closing of butterfly valve body 1. Since motor 13 has system control function, operators can easily remotely control the opening and closing of butterfly valve body 1, avoiding the need for operators to go to the butterfly valve body 1 for manual operation. The opening or closing of butterfly valve body 1 can be controlled remotely, increasing the convenience of operation for operators.

[0042] When the valve stem 133 drives the valve plate 14 to open, the valve plate 14 rotates inside the butterfly valve body 1, thereby causing the related structures inside the mounting groove 32 to rotate synchronously. As the soft magnetic ring frame 34 gradually moves away from the position of the strong magnetic ring 31, the magnetic force between the two disappears. Due to the loss of the attraction between opposite poles, the strong magnetic ring 31 no longer applies tension to the return spring 35. At this time, the return spring 35, with its own automatic rebound characteristic, will pull the soft magnetic ring frame 34 back into the mounting groove 32. The fixed connection between the frame 34 and the sealing strip 33 allows the sealing strip 33 to move along with the soft magnetic ring frame 34 as it moves into the mounting groove 32. This prevents the sealing strip 33 from always contacting the inner wall of the butterfly valve body 1 when the valve plate 14 rotates inside the butterfly valve body 1, thereby increasing the friction between the sealing strip 33 and the inner wall of the butterfly valve body 1. Consequently, the sealing strip 33 enters the mounting groove 32 through the sealing strip 33, reducing the wear of the sealing strip 33, preventing a decrease in the sealing effect of the sealing strip 33, and extending the service life of the sealing strip 33.

[0043] It should be noted that the force of the return spring 35 itself is less than the attraction force between the opposite poles of the soft magnetic ring 34 and the strong magnetic ring 31. The force of the return spring 35 itself is greater than the hardness of the soft magnetic ring 34 itself, which can pull the soft magnetic ring 34 to deform. Since the sealing strip 33 itself will deform under the force, it will not affect the interior of the mounting groove 32 inside the sealing strip 33.

[0044] When the soft magnetic ring 34 moves into the mounting groove 32, it generates a pushing force on the sealing plate 41. When the sealing plate 41 is pushed, it will squeeze the slide groove 42, causing the wider part of the sealing plate 41 to enter the lower part of the slide groove 42. When the sealing plate 41 stops at the position of the vent hole 4 at the narrower part, because the width of the vent hole 4 is greater than the narrower width of the sealing plate 41, the airflow can flow through the vent hole 4, avoiding the occurrence of cracks at the connection between the valve plate 14 and the valve stem 133 due to the large impact force of the airflow on the valve plate 14. The setting of the vent hole 4 ensures that the valve plate 14 is not open at a 90-degree angle. Under certain conditions, it can be stably fixed inside the butterfly valve body 1, reducing the impact force of airflow on the valve plate 14, thereby reducing the risk of cracks at the connection due to excessive force, protecting the connection structure between the valve plate 14 and the valve stem 133. At the same time, during the closing process, the presence of the vent hole 4 balances the air pressure on both sides of the valve plate 14, reducing the aerodynamic resistance encountered by the valve plate 14 when closing, thereby reducing the aerodynamic load on the valve plate 14 during the closing process. This not only makes the valve plate 14 close more smoothly, but also reduces the impact on the valve plate 14 and related components during the closing process, improving the stability and reliability of the closing process.

[0045] As the soft magnetic ring 34 moves downward, it compresses the telescopic shell 5. When the telescopic shell 5 is subjected to compressive force, it changes the pressure of the antioxidant inside the telescopic shell 5. At the same time, the antioxidant moves towards the discharge pipe 53 and supports the outer wall of the telescopic shell 5. The antioxidant opens the micropores 51 on the sealing strip 33 through the discharge pipe 53, allowing the antioxidant to flow from the micropores 51 to the outer wall of the sealing strip 33. This maintains the outer wall of the sealing strip 33 and prevents it from cracking under long-term use, thus affecting the sealing effect of the sealing strip 33. Correspondingly, by adding antioxidant to the inside of the sealing strip 33 when the valve plate 14 is opened, the sealing strip 33 is nourished and protected, effectively preventing the outer wall from cracking and maintaining the good performance of the sealing strip 33.

[0046] It should be noted that by inserting the micro-tube containing the antioxidant into the micro-hole 51 and making it contact with the discharge pipe 53, the antioxidant can be added into the interior of the telescopic shell 5.

[0047] When the valve plate 14 is closed by the valve stem 133, the mounting groove 32 on the valve plate 14 moves the internal structure to the position of the strong magnetic ring 31, causing the strong magnetic ring 31 and the soft magnetic ring frame 34 to enter the magnetic field. Through the attraction between the opposite poles of the strong magnetic ring 31 and the soft magnetic ring frame 34, the soft magnetic ring frame 34 pushes the sealing strip 33 upward to the outer wall of the mounting groove 32. When the sealing strip 33 moves into the interior of the mounting groove 32, under the compression of the strong magnetic ring 31 and the soft magnetic ring frame 34, the sealing strip 33 will be pressed against the butterfly valve body 1. The contact surface with the valve plate 14 deforms, causing the sealing strip 33 to fill the gap between the butterfly valve body 1 and the valve plate 14, thereby increasing the sealing effect between the butterfly valve body 1 and the valve plate 14. This ensures that when ventilation is closed, gas will not escape from the valve plate 14, maintaining the stability of the compartment air pressure. Secondly, the deformation capability of the sealing strip 33 allows it to adapt to minor dimensional changes or unevenness between the butterfly valve body 1 and the valve plate 14, maintaining a good sealing effect under different operating conditions and enhancing the adaptability of the butterfly valve body 1 to various operating environments.

[0048] After the reset spring 43 loses the pressure of the soft magnetic ring frame 34, it will push the sealing plate 41 to move inside the slide groove 42, so that the wider part of the sealing plate 41 moves to the position of the vent hole 4, which can mechanically block the vent hole 4 and prevent gas from leaking through the vent hole 4 when the valve plate 14 is blocking. Accordingly, the sealing effect of the valve plate 14 is increased, and the stability of the compartment air pressure is better maintained.

[0049] By pulling the handle 2 outward, the force applied to the handle 2 can drive the force rod 21 to move inside the main shaft 134. Through the fixed connection between the force rod 21 and the memory plate 24, when the force rod 21 drives the memory plate 24 to move, the memory plate 24 deforms due to the obstruction of the limiting plate 23 when it passes through the limiting plate 23. Thus, it moves inside the cavity through the limiting plate 23. Through the cooperation between the limiting plate 23 and the memory plate 24, the centrifugal force that would cause the mounting plate 26 to move out of the cavity when the motor 13 drives the main shaft 134 to rotate is avoided, thereby increasing the stability of the force rod 21 inside the cavity.

[0050] After one end of the force rod 21 is completely removed from the cavity, the operator can manually turn the handle 2. The movement of the handle 2 will cause the force rod 21 to drive the worm gear 132 to move, thereby controlling the valve plate 14 to open or close. This avoids the inability to open or close the valve plate 14 through the system cabinet in the event of a fire or power outage. It ensures that the ship's ventilation system can still be effectively controlled in emergency situations, maintaining or adjusting the air pressure in the compartments, providing the necessary ventilation conditions for emergency operations such as personnel evacuation and fire fighting, and ensuring the safety of the ship.

[0051] 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 control valve for regulating compartment air pressure in a ship ventilation system, comprising a butterfly valve body (1), characterized in that: A flow rectifier grid (12) is fixedly connected to the inner wall of the butterfly valve body (1). A device housing (11) is fixedly connected to the outer wall of the top of the butterfly valve body (1). A motor (13) is fixedly connected to the outer wall of one side of the device housing (11). A valve stem (133) is rotatably connected inside the device housing (11). A valve plate (14) is fixedly connected to the outer wall of the valve stem (133). An installation groove (32) is provided on the outer wall of the valve plate (14). A sealing strip (33) is movably connected inside the installation groove (32). An anti-wear mechanism is provided on the outer wall of the sealing strip (33). The anti-wear mechanism includes a soft magnetic ring frame (34), the interior of which is fixedly connected to the outer wall of the sealing strip (33), the outer wall of which is in movable contact with the interior of the mounting groove (32), the inner wall of the butterfly valve body (1) is provided with a groove two (3) at the position of the sealing strip (33), the inner wall of the groove two (3) is fixedly connected to a strong magnetic ring (31), the inner wall of the strong magnetic ring (31) and the outer wall of the soft magnetic ring frame (34) are attracted to each other by opposite poles, the inner wall of the soft magnetic ring frame (34) is fixedly connected to a return spring three (35), the outer wall of one end of the return spring three (35) is fixedly connected to the inner wall of the mounting groove (32), and there is a certain gap between the two ends of the soft magnetic ring frame (34) and the two ends of the mounting groove (32); The valve plate (14) has a vent hole (4) with two outer walls connected to each other. The vent hole (4) is in contact with a sealing plate (41). The valve plate (14) has a sliding groove (42) inside. The outer wall of one end of the sliding groove (42) is connected to the inside of the mounting groove (32). The inside of the sliding groove (42) is slidably connected to the outer wall of the sealing plate (41). A second return spring (43) is fixedly connected to the outer wall of one end of the sealing plate (41). The outer wall of one end of the second return spring (43) is fixedly connected to the inner wall of the sliding groove (42). The outer wall of the other end of the sealing plate (41) is in contact with the inner wall of the soft magnetic ring frame (34).

2. The control valve for regulating compartment air pressure in a ship ventilation system according to claim 1, characterized in that: The installation groove (32) is fixedly connected to a telescopic shell (5), and a discharge pipe (53) is fixedly connected to the outer wall of one end of the telescopic shell (5). A round hole (52) is opened on the outer wall of the soft magnetic ring frame (34). The inside of the round hole (52) is fixedly connected to the outer wall of the discharge pipe (53). A micro hole (51) is opened on the outer wall of the sealing strip (33) at the position of the round hole (52).

3. A control valve for regulating compartment air pressure in a ship ventilation system according to claim 1, characterized in that: A worm gear (131) is fixedly connected to the outer wall of the top of the valve stem (133). A worm (132) is meshed with the outer wall of the worm gear (131). Support rods are rotatably connected to the outer walls of both ends of the worm (132). The outer wall of the bottom of the support rod is fixedly connected to the lower part of the inner wall of the equipment housing (11).

4. A control valve for regulating compartment air pressure in a ship ventilation system according to claim 3, characterized in that: The worm (132) has a groove (22) inside. A force rod (21) is slidably connected inside the worm (132). A handle (2) is fixedly connected to the outer wall of one end of the force rod (21) through the inside of the equipment shell (11). A protruding strip is fixedly connected to the outer wall of the force rod (21). The outer wall of the protruding strip is slidably connected to the inside of the groove (22).

5. A control valve for regulating compartment air pressure in a ship ventilation system according to claim 1, characterized in that: The output end of the motor (13) is fixedly connected to a main shaft (134). The main shaft (134) has a cavity inside. A limit plate (23) is fixedly connected to the inner wall of the cavity. An installation plate (26) is rotatably connected inside the cavity. A return spring (25) is fixedly connected to the outer wall of one end of the installation plate (26). A memory plate (24) is fixedly connected to the outer wall of one end of the return spring (25).

6. A control valve for regulating compartment air pressure in a ship ventilation system according to claim 5, characterized in that: The outer wall of one side of the memory-shaped piece (24) is in contact with the outer wall of one side of the limiting plate (23), and the outer wall of one side of the memory-shaped piece (24) is fixedly connected to the outer wall of the other end of the force-bearing rod (21).

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