Sealing device for apron fixing pipe of hovercraft

Abstract

The invention relates to a hovercraft apron fixing pipe sealing device, which belongs to the field of ship design, can be arranged on an apron fixing pipe and faces a ship body, and comprises a sealing support plate arranged on the outer surface of the apron fixing pipe, sealing rubber arranged on the sealing support plate, and a fastening assembly arranged on the sealing support plate and connected with the sealing rubber, the sealing rubber bypasses the side edge close to the ship body from one side face of the sealing supporting plate and then extends to the other side face, and a gap is reserved between the side edge, close to the ship body, of the sealing supporting plate and the sealing rubber. According to the apron, air cushion gas escaping from the gap between the apron fixing pipe and the groove can be blocked, and buffering can be achieved between the apron fixing pipe and the groove.

Description

Technical Field

[0001] The invention belongs to the field of ship design and relates to a skirt fixing pipe sealing device for an air cushion ship. Background Art

[0002] The apron fixing tube device of hovercraft is a special equipment for hovercraft equipped with a large springboard. The apron can be retracted and extended synchronously with the springboard so as not to affect the normal opening of the springboard. The apron fixing tube is generally an arc-shaped tubular structure, fixed between the springboard and the hull, and rotates along the hinge installation axis. When the apron fixing tube is retracted, it is stored in the groove of the hull structure. During the navigation of the hovercraft, the air in the air cushion will escape through the gap between the apron fixing tube and the groove, affecting the cushioning performance of the hovercraft; if there is a sudden severe sea condition such as strong winds and waves, the apron fixing tube in a locked state is still prone to slight jumping, which may cause the apron fixing tube and the groove to collide and be damaged.

[0003] Commonly used dynamic sealing forms include contact seals and non-contact seals. Non-contact seals have poor sealing properties and are suitable for occasions with high sealing surface linear velocity. They are not suitable for sealing the hovercraft apron fixed tube. Contact seals are usually divided into expansion ring seals, mechanical seals and packing seals. Among them, 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, and are not suitable for sealing the apron fixed tube when it is folded into place. Summary of the invention

[0004] The purpose of the present invention is to provide a sealing device for a hovercraft skirt fixing pipe, which can not only block the cushion gas escaping from the gap between the skirt fixing pipe and the groove, but also act as a buffer between the skirt fixing pipe and the groove.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a hovercraft skirt fixing tube sealing device, which can be installed on the skirt fixing tube and face the hull, including a sealing support plate arranged on the outer surface of the skirt fixing tube, a sealing rubber arranged on the sealing support plate, and a fastening assembly arranged 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 close to the hull to the other side, and a gap is left between the side of the sealing support plate close to the hull and the sealing rubber.

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

[0007] Preferably, the sealing rubber is tightly fitted to two side surfaces of the sealing support plate respectively.

[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 chloroprene rubber, and the inner core is provided with a braided fabric for increasing strength and toughness.

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

[0013] Preferably, a reinforcing rod is provided on the side of the sealing support plate close to 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 sealing rubber is deformed by extrusion by 6 to 8 mm, and the upper surface of the ball head at the end of the sealing support plate needs to be 10 to 15 mm away from the lower surface of the sealing rubber after extrusion deformation.

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

[0016] The hovercraft apron fixing tube sealing device proposed by the present invention is simple and reliable in form, easy to use and maintain, and can not only seal the cushion gas escaping from the gap between the apron fixing tube and the groove, but also utilize the elasticity of the sealing rubber to play a buffering and anti-collision role between the apron fixing tube and the hull structure groove when the ship encounters severe sea conditions such as strong winds and waves. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0019] Figure 3 The present invention is a partially enlarged cross-sectional structural schematic diagram of a hovercraft apron fixing pipe sealing device.

[0020] Figure numerals: 1. sealing rubber; 2. sealing support plate; 3. pressure plate; 4. bolt; 5. nut; 6. spring washer; 7. apron fixing pipe; 8. springboard; 9. hull; 10. hull structure groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The embodiment of the present invention discloses a sealing device for the apron fixing pipe of a hovercraft, wherein the locking device is arranged on the upper surface of the top panel of the apron fixing pipe 7, and is arranged symmetrically on the left and right sides. The locking device is mainly composed of a sealing support plate 2, a pressure plate 3, and a sealing rubber 1. Figure 1 , Figure 2 The embodiments of the present invention are described in detail.

[0023] Figure 1 It is a schematic diagram of the arrangement of the present invention, which mainly includes a sealing device, an apron fixing tube 7, a gangway 8, and a hull 9. The apron fixing tube 7 is connected between the hull 9 and the gangway 8, and 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 just stuck in the gap between the apron fixing tube 7 and the hull structure groove 10, and the sealing rubber 1 on the top of the sealing device is squeezed and deformed, thereby playing a role in blocking gas leakage and sealing.

[0024] Figure 2 It is a typical cross-sectional enlarged schematic diagram of the present invention, which mainly includes a sealing rubber 1, a sealing support plate 2, a pressure plate 3, a bolt 4, a nut 5, and a spring washer 6. The sealing support plate 2 is a steel arc-shaped plate with a reinforcing rod welded at the end. Its extension direction is consistent with the apron fixing tube 7. 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 member to support and install the sealing rubber 1. The sealing rubber 1 mainly serves as the main body of the sealing device and plays a role of sealing and buffering. The pressure plate 3 is also a steel arc-shaped plate. Its extension direction is consistent with the apron fixing tube 7. It is installed on the inner and outer sides of the sealing support plate 2 respectively, which increases the contact area of ​​the fastener, improves the force of the sealing rubber 1, and reduces the risk of the sealing rubber 1 being torn at the fastener. The installation hole on the pressure plate 3 needs to be drilled on site. The bolt 4, nut 5, and spring washer 6 are fasteners of the sealing device, which are used to connect the pressure plate 3, the sealing rubber 1 and the sealing support plate 2. The spring washer 6 plays a role of preventing loosening.

[0025] The present invention should be noted that:

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

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

[0028] The specific embodiments of the present invention are 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 made to the present invention are also within the scope of the present invention. Therefore, the equalization and modification made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. The scope of protection claimed in the present invention is defined by the attached claims and their equivalents.

Claims

1. A sealing device for a hovercraft skirt fixing pipe, characterized in that: The invention can be installed on the skirt fixing tube (7) and face the hull (9), and comprises a sealing support plate (2) arranged on the outer surface of the skirt fixing tube (7), a sealing rubber (1) arranged on the sealing support plate (2), and a fastening component arranged on the sealing support plate (2) and connected to the sealing rubber (1), wherein the sealing rubber (1) extends from one side of the sealing support plate (2) around the side close to the hull (9) to the other side, and a gap is left between the side of the sealing support plate (2) close to the hull (9) and the sealing rubber (1).

2. The hovercraft skirt fixing pipe sealing device 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 hovercraft skirt fixing pipe sealing device according to claim 2, characterized in that: The sealing rubber (1) is respectively tightly fitted to two side surfaces of the sealing support plate (2).

4. The hovercraft skirt fixing pipe sealing device according to claim 3, characterized in that: The fastening assembly comprises a bolt (4), a nut (5), and a spring washer (6).

5. The hovercraft skirt fixing pipe sealing device according to claim 2, characterized in that: The sealing support plate (2) and the pressing plate (3) are steel arc-shaped plates.

6. The hovercraft skirt fixing pipe sealing device 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 hovercraft skirt fixing pipe sealing device according to claim 1, characterized in that: The sealing rubber (1) is made of chloroprene rubber, and the inner core is provided with a braided fabric for increasing strength and toughness.

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

9. The hovercraft skirt fixing pipe sealing device according to claim 1, characterized in that: A reinforcing rod is provided on the side of the sealing support plate (2) close to the hull (9), and a gap is left between the reinforcing rod and the sealing rubber (1).

10. The hovercraft skirt fixing pipe sealing device according to claim 9, characterized in that: When the apron fixing tube (7) is retracted into place and locked, the deformation of the sealing rubber (1) due to extrusion deformation is 6 to 8 mm, and the upper surface of the ball head at the end of the sealing support plate (2) needs to be 10 to 15 mm away from the lower surface of the sealing rubber (1) after extrusion deformation.

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