A hovercraft skirt fixing tube sealing device

Abstract

The invention relates to a kind of hovercraft skirt fixing pipe sealing device, it is related to the field of ship design, it can be installed on skirt fixing pipe and towards ship body, including the sealing support plate on the outer surface of skirt fixing pipe, the sealing rubber on the sealing support plate, and the fastening assembly on the sealing support plate and connecting sealing rubber, sealing rubber from the side of sealing support plate around the side close to ship body extends to the other side, there is a gap between the side close to ship body of sealing support plate and sealing rubber.The invention can not only block the hovercraft gas escaping from the gap between skirt fixing pipe and groove, but also can act as a buffer between skirt fixing pipe and groove.

Description

Technical Field

[0001] This invention belongs to the field of ship design and relates to a sealing device for the skirt fixing tube of an air-cushioned vessel. Background Technology

[0002] The apron fixing tube device is a specialized piece of equipment for hovercraft equipped with large gangplanks. It allows the apron to be raised and lowered synchronously with the gangplank, ensuring uninterrupted gangplank operation. The apron fixing tube is typically an arc-shaped tubular structure, fixed between the gangplank and the hull, rotating along a hinged mounting axis. When retracted, the apron fixing tube is housed in a recess within the hull structure. During hovercraft operation, air from the air cushion can escape through the gap between the apron fixing tube and the recess, affecting the hovercraft's lifting performance. Furthermore, in the event of severe sea conditions such as strong winds and high waves, even when locked, the apron fixing tube is prone to slight vibrations, potentially causing it to collide and damage the recess.

[0003] Common dynamic sealing methods include contact seals and non-contact seals. Non-contact seals have poor sealing performance and are suitable for applications with high sealing surface linear velocity, but are not suitable for sealing the skirt fixing pipe of hovercraft. Contact seals are usually divided into expansion ring seals, mechanical seals, and packing seals. Expansion ring seals require liquid lubrication and are generally used for sealing liquid media. Mechanical seals are often used for sealing rotating shafts. Packing seals are also mostly used for sealing reciprocating and rotating motions, but none of them are suitable for sealing the skirt fixing pipe when it is retracted into place. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing device for the skirt fixing tube of a hovercraft, which can both block the air cushion gas escaping from the gap between the skirt fixing tube and the groove, and also act as a buffer between the skirt fixing tube and the groove.

[0005] To achieve the above objectives, the present invention provides a sealing device for a hovercraft apron fixing tube, which can be installed on the apron fixing tube and facing the hull. It includes a sealing support plate on the outer surface of the apron fixing tube, a sealing rubber on the sealing support plate, and a fastening assembly on the sealing support plate and connected to the sealing rubber. The sealing rubber extends from one side of the sealing support plate around the side near the hull to the other side, and a gap is left between the sealing support plate and the sealing rubber on the side near the hull.

[0006] Preferably, the fastening assembly is provided with a pressure plate to improve the stress on the sealing rubber.

[0007] Preferably, the sealing rubber is tightly fitted to both sides of the sealing support plate.

[0008] Preferably, the fastening assembly includes a bolt, a nut, and a spring washer.

[0009] Preferably, the sealing support plate and the pressure plate are steel arc-shaped plates.

[0010] Preferably, the sealing support plate is connected to the outer surface of the apron fixing tube by double-sided welding.

[0011] Preferably, the sealing rubber is made of neoprene rubber, and the inner core is provided with a woven fabric to increase strength and toughness.

[0012] Preferably, the sealing rubber has a thickness of 3 mm and a Shore hardness of 75.

[0013] Preferably, the sealing support plate has a reinforcing rod on the side near the hull, and a gap is left between the reinforcing rod and the sealing rubber.

[0014] Preferably, when the apron fixing tube is retracted into place and locked, the deformation of the sealing rubber is 6-8 mm, and the upper surface of the ball head at the end of the sealing support plate needs to be 10-15 mm away from the lower surface of the deformed sealing rubber.

[0015] In summary, the present invention has the following beneficial technical effects:

[0016] The air-cushion boat skirt fixing tube sealing device proposed in this invention is simple and reliable, and easy to use and maintain. It can not only block the air cushion gas escaping from the gap between the skirt fixing tube and the groove, but also use the elasticity of the sealing rubber to buffer and prevent collisions between the skirt fixing tube and the groove of the hull structure when the boat encounters severe sea conditions such as strong winds and waves. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the arrangement of a sealing device for fixing the skirt of a hovercraft according to the present invention;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of a sealing device for a hovercraft apron fixing tube according to the present invention;

[0019] Figure 3 This is a partially enlarged cross-sectional view of the sealing device for the skirt fixing tube of a hovercraft according to the present invention.

[0020] Reference numerals: 1. Sealing rubber; 2. Sealing support plate; 3. Pressure plate; 4. Bolt; 5. Nut; 6. Spring washer; 7. Apron fixing tube; 8. Jumping board; 9. Hull; 10. Hull structural groove. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on 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.

[0022] This invention discloses a sealing device for the skirt fixing tube of a hovercraft. The locking device is arranged on the upper surface of the top panel of the skirt fixing tube 7, symmetrically arranged on the port and starboard sides. The locking device mainly consists of a sealing support plate 2, a pressure plate 3, and a sealing rubber 1. The following describes the process in conjunction with... Figure 1 , Figure 2 The embodiments of the present invention are described in detail below.

[0023] Figure 1 This is a schematic diagram of the arrangement of the present invention, mainly including a sealing device, an apron fixing tube 7, a gangplank 8, and a hull 9. The apron fixing tube 7 is connected between the hull 9 and the gangplank 8. The sealing device is arranged on the upper surface of the top panel of the apron fixing tube 7. When the apron fixing tube 7 is retracted into place, the sealing device is precisely locked in the gap between the apron fixing tube 7 and the groove 10 of the hull structure. The sealing rubber 1 at the top of the sealing device is squeezed and deformed, thereby preventing gas leakage and achieving a sealing effect.

[0024] Figure 2 This is a typical enlarged cross-sectional view of the present invention, mainly including sealing rubber 1, sealing support plate 2, pressure plate 3, bolts 4, nuts 5, and spring washers 6. The sealing support plate 2 is a steel arc-shaped plate with reinforcing rods welded to its ends. Its extension direction is consistent with that of the apron fixing tube 7, and it is connected to the upper surface of the top panel of the apron fixing tube 7 by double-sided welding. The sealing support plate 2 serves as a structural component, supporting and installing the sealing rubber 1. The sealing rubber 1 mainly serves as the main body of the sealing device, providing sealing and buffering. The pressure plate 3 is also a steel arc-shaped plate, extending in the same direction as the apron fixing tube 7. It is installed on the inner and outer sides of the sealing support plate 2, increasing the contact area of ​​the fasteners, improving the stress on the sealing rubber 1, and reducing the risk of the sealing rubber 1 being torn at the fasteners. The mounting holes on the pressure plate 3 need to be drilled on-site. Bolts 4, nuts 5, and spring washers 6 are the fasteners of the sealing device, used to connect the pressure plate 3, sealing rubber 1, and sealing support plate 2. The spring washers 6 serve to prevent loosening.

[0025] It should be noted that the present invention includes the following:

[0026] (1) Considering that the working environment of the sealing rubber 1 is a harsh environment with high temperature, high humidity and strong ultraviolet radiation, the rubber material is chloroprene rubber with good aging resistance, heat resistance and oil resistance, with a thickness of about 3 mm, Shore hardness of 75, and an inner core containing a layer of woven material to increase its strength and toughness.

[0027] (2) The height of the sealing support plate 2 and the width of the sealing rubber 1 should take into account the amount of compression deformation and the margin under impact inertia, so as to ensure that when the apron fixing tube 7 is retracted and locked, the sealing rubber 1 must undergo a certain amount of compression deformation, with a deformation of about 6 to 8 mm. The upper surface of the ball head at the end of the sealing support plate 2 should be about 10 to 15 mm away from the lower surface of the compressed sealing rubber 1.

[0028] The specific embodiments of the present invention have been described in detail above, but they are only examples. The present invention is not limited to the specific implementation examples described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device for the skirt fixing tube of a hovercraft, characterized in that, It can be installed on the apron fixing tube (7) and facing the hull (9) to seal the air cushion gas between the apron fixing tube (7) and the hull structure groove (10) and buffer the collision. It includes a sealing support plate (2) on the outer surface of the apron fixing tube (7), a sealing rubber (1) on the sealing support plate (2), and a fastening assembly on the sealing support plate (2) and connected to the sealing rubber (1). The sealing rubber (1) extends from one side of the sealing support plate (2) around the side near the hull (9) to the other side. There is a gap between the side of the sealing support plate (2) near the hull (9) and the sealing rubber (1). When the apron fixing tube (7) is retracted and locked, the deformation of the sealing rubber (1) is 6~8 mm, and the upper surface of the ball head at the end of the sealing support plate (2) needs to be 10~15 mm away from the lower surface of the deformed sealing rubber (1).

2. The sealing device for the skirt fixing tube of a hovercraft according to claim 1, characterized in that, The fastening assembly is provided with a pressure plate (3) to improve the stress on the sealing rubber (1).

3. The sealing device for the skirt fixing tube of a hovercraft according to claim 2, characterized in that, The sealing rubber (1) is tightly fitted to the two sides of the sealing support plate (2).

4. The sealing device for the skirt fixing tube of a hovercraft according to claim 3, characterized in that, The fastening assembly includes a bolt (4), a nut (5), and a spring washer (6).

5. A sealing device for a hovercraft apron fixing tube according to claim 2, characterized in that, The sealing support plate (2) and the pressure plate (3) are steel arc-shaped plates.

6. A sealing device for a hovercraft apron fixing tube according to claim 5, characterized in that, The sealing support plate (2) is connected to the outer surface of the apron fixing tube (7) by double-sided welding.

7. The sealing device for the skirt fixing tube of a hovercraft according to claim 1, characterized in that, The sealing rubber (1) is made of neoprene rubber, and the inner core is provided with a woven material to increase strength and toughness.

8. A sealing device for a hovercraft apron fixing tube according to claim 7, characterized in that, The sealing rubber (1) has a thickness of 3 mm and a Shore hardness of 75.

9. A sealing device for a hovercraft apron fixing tube according to claim 1, characterized in that, The sealing support plate (2) is provided with a reinforcing rod on the side near the hull (9), and there is a gap between the reinforcing rod and the sealing rubber (1).

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