A jet hole plug with one-way closing function

Abstract

The application discloses a one-way closed air injection hole plug, which is characterized by the following technical scheme: an air injection hole is arranged at the bottom of a pressure stabilizing cavity structure, the air injection hole is arranged on a ship bottom outer plate, a top limiting structure is arranged in the air injection hole, a fixed supporting pin is sleeved and fixed in the top limiting structure, a sealing plug body is arranged outside a support structure at the bottom of the fixed supporting pin, the sealing plug body is in a cylindrical structure, a bottom limiting structure is arranged at the bottom of the sealing plug body, a circular bottom seat is arranged at the bottom of the bottom limiting structure, and the outer diameter of the circular bottom seat is larger than the diameter of the air injection hole. The application has the advantages that when the air layer drag reduction system stops working, seawater and marine organisms cannot enter the air cavity, seawater corrosion of the air cavity and the inner bottom plate of the ship body is avoided, the operation reliability of the air layer drag reduction system is improved, and the safety of the ship structure is improved. High-pressure gas can pass through the air injection hole plug from top to bottom, liquid cannot pass through the air injection hole plug from bottom to top, the plug body is stable and cannot slide out of the air injection hole.

Description

Technical Field

[0001] This invention relates to the field of air lubrication drag reduction, and more specifically, to a jet plug with a one-way sealing function. Background Technology

[0002] Marine gas drag reduction technology involves introducing air into the hull during navigation to form a stable gas lubrication layer, thereby reducing surface friction. The marine gas layer drag reduction system includes an air supply system, an air chamber, and jet nozzles. The jet nozzles are located on the bottom plate and communicate with the air chamber. When the ship is moving, the air supply system supplies air into the air chamber, and the gas in the chamber is ejected through the jet nozzles to the outside of the hull, forming a gas lubrication layer on the bottom of the hull that reduces drag.

[0003] When a ship is docked or encounters severe sea conditions during navigation, the ship's air layer drag reduction system will shut down. At this time, seawater will enter the air chamber through the jet nozzles, carrying marine organisms into the chamber. Furthermore, because seawater is corrosive, it will corrode the ship's steel plates and the air chamber. Prolonged immersion in seawater can lead to corrosion of the internal structure of the pressure chamber, affecting the ship's structural safety. The marine organisms that proliferate within the pressure chamber can also clog the jet nozzles, affecting the normal operation of the gas lubrication system.

[0004] Therefore, there is an urgent need for a suitable jet hole sealing device to solve the problem of seawater entering the air chamber through the jet hole. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes an improved air chamber structure that prevents seawater from carrying marine organisms into the air chamber when the air layer drag reduction system is not in operation, avoids seawater corrosion of the air chamber and the hull's inner bottom plate, improves the operational reliability of the air layer drag reduction system, enhances the structural safety of the ship, and reduces the number of times it needs to be docked for maintenance.

[0006] To achieve the above objectives, the present invention provides a jet plug with a one-way sealing function, including a bottom outer plate, a pressure stabilizing cavity structure on the upper side of the bottom outer plate, a jet hole at the bottom of the pressure stabilizing cavity structure, the jet hole being disposed on the bottom outer plate, the jet hole having a top limiting structure, the upper part being a notched ring, the outer diameter of the ring being larger than the diameter of the jet hole, the bottom of the ring being symmetrically connected to the two sides of the bottom, the first hanging arm having an inwardly extending first hanging lug at the end of the first hanging arm, the first hanging lug having a concave hole.

[0007] The top limiting structure is fitted with a fixed support pin. The upper part of the fixed support pin is a ring structure. The outer diameter of the ring structure is stepped. The outer diameter of the first ring of the stepped structure is the same as the inner diameter of the ring. The side surface of the first ring of the stepped structure has a protrusion corresponding to the shape of the ring notch. The outer diameter of the second ring of the stepped structure is the same as the distance between the inner surface of the first hanging arm. The lower end of the ring structure is provided with a support structure. The support structure includes four support plates. The four support plates are evenly connected in a circle at the bottom of the ring structure. The support plates extend downward and toward the center of the ring structure to form a cone structure.

[0008] A sealing plug is provided on the outside of the support structure at the bottom of the fixed support pin. The sealing plug is a cylindrical structure with an "M" shaped longitudinal section. The inside of the sealing plug is a lower funnel-shaped conical structure. The conical structure is divided into four fan-shaped pieces, each with an area greater than one-quarter of the conical area. Each fan-shaped piece overlaps with the others, and the overlap position is aligned with the support plate of the support structure.

[0009] The bottom of the sealing plug is provided with a bottom limiting structure, and the bottom of the bottom limiting structure is provided with a circular base. The outer diameter of the circular base is greater than the diameter of the air jet hole. The circular base is provided with a second hanging arm symmetrically arranged. The top of the second hanging arm is provided with a second hanging ear extending clockwise along the circular base. The lower side of the second hanging ear is provided with a protrusion that matches the concave hole. The second hanging ear is screwed into the gap between the first hanging ear and the bottom of the sealing plug, and the protrusion is inserted into the concave hole to form a locking structure.

[0010] In the preferred embodiment, the top limiting structure, the fixing support pin, and the bottom limiting structure of the aforementioned jet plug with one-way sealing function are all made of stainless steel.

[0011] In the preferred embodiment of the jet plug with one-way sealing function, the sealing plug body is made of an elastic and corrosion-resistant material.

[0012] In the preferred embodiment of the jet plug with one-way sealing function, the first hanging arm in the top limiting structure can be increased to three or four, and the first hanging lug on the first hanging arm can be increased to three or four accordingly.

[0013] In the preferred embodiment of the jet plug with one-way sealing function, the second hanging arm in the bottom limiting structure can be increased to three or four, and the second hanging lug on the second hanging arm can be increased to three or four accordingly.

[0014] In the preferred embodiment of the aforementioned jet plug with one-way sealing function, the support plate consists of three or five pieces.

[0015] In the preferred embodiment, the aforementioned jet plug with one-way sealing function has three or five fan-shaped pieces.

[0016] The advantages of this invention are that it prevents seawater from carrying marine organisms into the air chamber when the air layer drag reduction system is not operating, avoids seawater corrosion of the air chamber and the hull's inner bottom plate, improves the operational reliability of the air layer drag reduction system, enhances ship structural safety, and reduces the frequency of dry-docking maintenance. High-pressure gas can pass through the jet plug from top to bottom, while liquid (seawater) cannot pass through the jet plug from bottom to top, ensuring the plug is stable and will not slip out of the jet hole upwards or downwards. This solves the problem of seawater entering the pressure stabilizing chamber, and the design is simple and reliable. This invention can be installed and fixed from the bottom of the hull plate upwards on one side. Attached Figure Description

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

[0018] Figure 2 This is a cross-sectional schematic diagram of the overall structure of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the overall structure of the present invention.

[0020] Figure 4 This is a front view schematic diagram of the top limiting structure of the present invention.

[0021] Figure 5 This is a top view schematic diagram of the top limiting structure of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the top limiting structure of the present invention.

[0023] Figure 7 This is a front view schematic diagram of the fixed support pin structure of the present invention.

[0024] Figure 8 This is a top view schematic diagram of the fixed support pin structure of the present invention.

[0025] Figure 9 This is a three-dimensional structural diagram of the fixed support pin of the present invention.

[0026] Figure 10 This is a front view schematic diagram of the sealing plug body of the present invention.

[0027] Figure 11 This is a top view schematic diagram of the sealing plug structure of the present invention.

[0028] Figure 12 This is a schematic diagram of the three-dimensional structure of the sealing plug of the present invention.

[0029] Figure 13 This is a front view schematic diagram of the bottom limiting structure of the present invention.

[0030] Figure 14 This is a top view schematic diagram of the bottom limiting structure of the present invention.

[0031] Figure 15 This is a three-dimensional structural diagram of the bottom limiting structure of the present invention.

[0032] Figure 16 This is a schematic diagram of the assembly of the present invention.

[0033] In the diagram: 1. Top limiting structure; 11. Ring; 12. First hanging arm; 13. First hanging ear; 14. Recessed hole; 2. Fixed support pin; 21. Ring structure; 22. Protrusion; 23. Bracket structure; 3. Sealing plug; 31. Fan-shaped single piece; 4. Bottom limiting structure; 41. Ring-shaped base; 42. Second hanging arm; 43. Second hanging ear; 44. Protruding hole; 100. Air jet hole; 101. Bottom outer plate; 102. Pressure stabilizing chamber structure. Detailed Implementation

[0034] like Figure 1 As shown, the present invention provides a jet plug with a one-way sealing function, including a bottom outer plate 101, a pressure stabilizing cavity structure 102 on the upper side of the bottom outer plate 101, and a jet hole 100 at the bottom of the pressure stabilizing cavity structure 102. The jet hole 100 is disposed on the bottom outer plate 101.

[0035] like Figures 2-6 As shown, the jet hole 100 is provided with a top limiting structure 1, the upper part of which is a ring 11 with a notch. The outer diameter of the ring 11 is larger than the diameter of the jet hole 100. The bottom two sides of the ring 11 are symmetrically connected to the first hanging arm 12. The end of the first hanging arm 12 is provided with an inwardly extending first hanging ear 13, and the first hanging ear 13 is provided with a concave hole 14.

[0036] like Figures 7-9 As shown, a fixed support pin 2 is sleeved inside the top limiting structure 1. The upper part of the fixed support pin 2 is a ring structure 21. The outer diameter of the ring structure 21 is a stepped structure. The outer diameter of the first ring of the stepped structure is the same as the inner diameter of the ring 11. The side surface of the first ring of the stepped structure is provided with a protrusion 22 corresponding to the shape of the notch of the ring 11. The outer diameter of the second ring of the stepped structure is the same as the distance between the inner surface of the first hanging arm 12. The lower end of the ring structure 21 is provided with a support structure 23. The support structure 23 includes four support plates. The four support plates are evenly connected in a circle at the bottom of the ring structure 21. The support plates extend downward and toward the center of the ring structure 21 to form a cone structure.

[0037] like Figures 10-12As shown, a sealing plug 3 is provided on the outside of the support structure 23 at the bottom of the fixed support pin 2. The sealing plug 3 is a cylindrical structure with an "M" shaped longitudinal section. The interior of the sealing plug 3 is a funnel-shaped conical structure. The conical structure is divided into four fan-shaped pieces 31. The area of ​​each fan-shaped piece 31 is greater than one-quarter of the area of ​​the conical surface. Each fan-shaped piece 31 overlaps with the others, and the overlap position is aligned with the position of the support plate of the support structure 23.

[0038] like Figures 13-15 As shown, the bottom of the sealing plug 3 is provided with a bottom limiting structure 4, and the bottom of the bottom limiting structure 4 is provided with a circular base 41. The outer diameter of the circular base 41 is greater than the diameter of the air jet hole 100. The circular base 41 is provided with symmetrically arranged second hanging arms 42. The top of the second hanging arm is provided with a second hanging ear 43 extending clockwise along the circular base 41. The lower side of the second hanging ear 43 is provided with a protruding hole 44 that matches the concave hole 14. The second hanging ear 43 is screwed into the gap between the first hanging ear 13 and the bottom end of the sealing plug 3, and the protruding hole 44 is inserted into the concave hole 14 to form a locking structure.

[0039] The top limiting structure 1, the fixed support pin 2, and the bottom limiting structure 4 are all made of stainless steel.

[0040] The sealing plug 3 is made of an elastic, corrosion-resistant material.

[0041] In another embodiment, the first hanging arm 12 in the top limiting structure 1 can be increased to three or four, and the first hanging ear 13 on the first hanging arm 12 can be increased to three or four accordingly.

[0042] In another embodiment, the second hanging arm 42 in the bottom limiting structure 4 can be increased to three or four, and the second hanging ear 43 on the second hanging arm 42 can be increased to three or four accordingly.

[0043] In another implementation, there are three or five support plates.

[0044] In another implementation, the fan-shaped single piece 31 consists of three or five pieces.

[0045] like Figure 1 As shown, the partial system consists of a bottom outer plate 101, a pressure-stabilizing cavity structure 102, and jet nozzles 100 on the outer plate. It can be seen that, due to the limitations of the pressure-stabilizing cavity structure, the jet nozzle plugs can only be installed unidirectionally from the outside of the outer plate upwards.

[0046] A jet plug with a one-way sealing function consists of a top limiting structure 1, a fixing support pin 2, a sealing plug body 3, and a bottom limiting structure 4. Its main function is to allow high-pressure gas to pass through the jet plug from top to bottom, while preventing liquid (seawater) from passing through the jet plug from bottom to top.

[0047] The top limiting structure 1 is made of stainless steel. The upper part is a notched ring 11, the outer diameter D11 of which is larger than the diameter d of the air jet hole, thus preventing the air jet plug from falling out of the air jet hole in a downward direction. First hanging arms 12 are connected to both sides of the ring, each with a first hanging lug 13 and a recessed hole 14. This structure allows for temporary reduction of the ring's outer diameter by pressing it to allow it to pass through the air jet hole, enabling installation from the bottom of the air jet hole upwards.

[0048] The fixed support pin 2 is made of stainless steel. The upper part is a ring structure 21 with a stepped outer diameter. The outer diameter D21 of the uppermost part is equal to the inner diameter D12 of the ring 11 of the top limiting structure 1, and it has a protrusion 22 with the same width as the notch in the ring 11 of the top limiting structure 1. The outer diameter D22 of the lower part is equal to the distance L between the inner end faces of the two first hanging arms 12 of the top limiting structure 1. This structure acts as a fixing pin for the top limiting structure 1. The protrusion 22 fills the notch in the ring 11 and expands the ring 11. The combination of these two parts prevents the jet plug from falling downwards. The lower part of the fixed support pin 2 is a bracket structure 23 with four support plates evenly distributed in a V-shape. The support plates provide unidirectional support, preventing the sealing plug 3 from being depressed upwards by the water pressure below.

[0049] The sealing plug 3 is made of elastic corrosion-resistant material (such as rubber, silicone). Its outer shape is cylindrical, with the outer diameter D3 equal to D22. The inside is a concave funnel-shaped cone surface, which is divided into 4 fan-shaped pieces 31. The area of ​​each fan-shaped piece 31 is greater than one-quarter of the area of ​​the cone surface. Each piece overlaps with the others, and the overlap position is aligned with the support plate of the fixed support pin 2.

[0050] The bottom limiting structure 4 is made of stainless steel, with a circular base 41 at the bottom. The outer diameter D41 of the circular base 41 is larger than the diameter d of the jet hole, thus preventing the jet hole plug from falling out of the jet hole in the upward direction. Second hanging arms 42 are symmetrically connected to both sides of the circular base 41. Second hanging arms have second hanging ears 43, and each second hanging ear 43 has a protruding hole 44. This structure can be pressed in and rotated to lock the protruding hole 44 on the second hanging ear 43 into the concave hole 14 on the first hanging ear 13, thereby connecting the top limiting structure 1 and the bottom limiting structure 4 and completing the assembly of the jet hole plug. After assembly, the second hanging ear 43 is flush with the lower end of the sealing plug body 3, serving to fix the sealing plug body 3.

[0051] The working principle of this invention is as follows: When the gas layer drag reduction system is working, gas accumulates in the pressure stabilizing chamber. The high-pressure gas blows downwards, opening the conical surface of the sealing plug 3 and passing through the jet hole plug. When the gas layer drag reduction system stops working, the external seawater exerts upward pressure on the conical surface of the sealing plug 3. Due to the support of the upper support structure, the conical surface cannot collapse upwards, and the elastic conical surfaces overlap to achieve a sealing effect. The top limiting structure 1 and the bottom limiting structure 4 are connected to each other by the second hanging arm to form a whole, fixing the jet hole plug in the jet hole 100 and preventing it from falling upwards or downwards.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A jet plug with a one-way sealing function, characterized in that, The vessel includes a bottom outer plate (101), a pressure stabilizing cavity structure (102) on the upper side of the bottom outer plate (101), an air jet hole (100) at the bottom of the pressure stabilizing cavity structure (102), the air jet hole (100) is located on the bottom outer plate (101), a top limiting structure (1) is provided inside the air jet hole (100), the upper part is a ring (11) with a notch, the outer diameter of the ring (11) is larger than the diameter of the air jet hole (100), the bottom of the ring (11) is symmetrically connected to the two sides of the bottom of the ring (11) and the first hanging arm (12) is provided on the end of the first hanging arm (12) with an inwardly extending first hanging ear (13), and the first hanging ear (13) is provided with a concave hole (14); The top limiting structure (1) is fitted with a fixed support pin (2). The upper part of the fixed support pin (2) is a ring structure (21). The outer diameter of the ring structure (21) is a stepped structure. The outer diameter of the first ring of the stepped structure is the same as the inner diameter of the ring (11). The side surface of the first ring of the stepped structure is provided with a protrusion (22) corresponding to the notch shape of the ring (11). The outer diameter of the second ring of the stepped structure is the same as the distance between the inner surface of the first hanging arm (12). The lower end of the ring structure (21) is provided with a bracket structure (23). The bracket structure (23) includes four support plates. The four support plates are evenly connected to the bottom of the ring structure (21) in a circle. The support plates extend downward and toward the center of the ring structure (21) to form a cone structure. The bottom of the fixed support pin (2) has a sealing plug (3) on the outside of the support structure (23). The sealing plug (3) is a cylindrical structure. The longitudinal section of the sealing plug (3) is "M" shaped. The inside of the sealing plug (3) is a lower funnel-shaped conical structure. The conical structure is divided into four fan-shaped pieces (31). The area of ​​the fan-shaped piece (31) is greater than one-quarter of the area of ​​the conical surface. Each fan-shaped piece (31) overlaps with the others. The overlapping position is aligned with the position of the support plate of the support structure (23). The bottom of the sealing plug (3) is provided with a bottom limiting structure (4), and the bottom of the bottom limiting structure (4) is provided with a circular base (41). The outer diameter of the circular base (41) is greater than the diameter of the air jet (100). The circular base (41) is provided with symmetrically arranged second hanging arms (42). The top of the second hanging arm is provided with a second hanging ear (43) extending clockwise along the circular base (41). The lower side of the second hanging ear (43) is provided with a protruding hole (44) that matches the concave hole (14). The second hanging ear (43) is screwed into the gap between the first hanging ear (13) and the bottom end of the sealing plug (3). The protruding hole (44) is inserted into the concave hole (14) to form a locking structure.

2. The jet plug with one-way sealing function according to claim 1, characterized in that, The top limiting structure (1), the fixed support pin (2), and the bottom limiting structure (4) are all made of stainless steel.

3. The jet plug with one-way sealing function according to claim 1, characterized in that, The sealing plug (3) is made of an elastic and corrosion-resistant material.

4. The jet plug with one-way sealing function according to claim 1, characterized in that, The first hanging arm (12) in the top limiting structure (1) can be increased to three or four, and the first hanging ear (13) on the first hanging arm (12) can be increased to three or four accordingly.

5. The jet plug with one-way sealing function according to claim 1, characterized in that, The second hanging arm (42) in the bottom limiting structure (4) can be increased to three or four, and the second hanging ear (43) on the second hanging arm (42) can be increased to three or four accordingly.

6. The jet plug with one-way sealing function according to claim 1, characterized in that, The support plates consist of three or five pieces.

7. The jet plug with one-way sealing function according to claim 1, characterized in that, The fan-shaped single piece (31) consists of three or five pieces.

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