An inflatable barrier type bellows seal

Abstract

The utility model belongs to marine equipment technical field, concretely belongs to a kind of inflatable blocking type bellows sealing structure, water seal moving ring, water seal static ring, bellows, inflatable blocking assembly;Inflatable blocking assembly includes air tire seat, air tire gland, air tire, air tire inner framework;Air tire seat is installed on the marine stern shaft, in air tire seat, air tire is provided, in air tire, air tire inner framework is provided, and air tire is outside, air tire gland is installed on air tire seat, air channel is connected in air tire seat, and air channel is connected in air tire seat;Marine stern shaft is provided with water seal moving ring and water seal static ring;The both ends of bellows are connected respectively on water seal static ring and air tire seat.

Description

Technical Field

[0001] This utility model belongs to the field of marine equipment technology, specifically to an inflatable blocking type bellows sealing structure. Background Technology

[0002] In existing technologies, although a bellows sealing structure is installed on the stern shaft, the stern shaft must be kept dry during stern shaft seal maintenance to prevent water from entering the hull. Therefore, existing technologies require the ship to be towed into a dry dock for stern shaft seal maintenance, resulting in lengthy and costly repairs. Summary of the Invention

[0003] This invention provides an inflatable blocking bellows sealing structure to facilitate ship seal maintenance and reduce maintenance costs.

[0004] A pneumatic blocking type bellows sealing structure, characterized by a water seal dynamic ring, a water seal stationary ring, a bellows, and a pneumatic blocking component; The inflation blocking assembly includes a pneumatic tire seat, a pneumatic tire cover, a pneumatic tire, and a pneumatic tire inner frame. The pneumatic tire seat is installed on the stern shaft of the ship. Inside the pneumatic tire seat, a pneumatic tire is provided. Inside the pneumatic tire, a pneumatic tire inner frame is provided. On the outside of the pneumatic tire, on the pneumatic tire seat, a pneumatic tire cover is installed. An air passage is connected in the pneumatic tire seat to the pneumatic tire. The ship's stern shaft is equipped with a water seal dynamic ring and a water seal stationary ring; The two ends of the bellows are connected to the water seal stationary ring and the air tire seat, respectively.

[0005] Furthermore, the pneumatic tire seat is connected to the stern tube.

[0006] Furthermore, the corrugated pipe is connected to the outside of the water seal stationary ring and the pneumatic tire seat by clamps.

[0007] The beneficial effects of this utility model are: In use, this invention involves inflating the air tire to tighten the stern shaft, preventing water from entering the stern shaft tube and creating a seal. Even when the stern shaft is underwater, maintenance work such as replacing parts of the bellows water seal can still be performed. Therefore, this sealing structure eliminates the need for docking and hoisting during maintenance, saving costs and improving efficiency. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of the structure within the circle.

[0009] In the diagram: 1. Water seal moving ring; 2. Water seal stationary ring; 3. Bellows; 4.1. Pneumatic tire seat; 4.2. Pneumatic tire gland; 4.3. Pneumatic tire; 4.4. Pneumatic tire inner frame; 4.5. Air passage; 5. Ship stern shaft; 6. Clamp; 7. Stern shaft tube. Detailed Implementation

[0010] The technical solution of the present invention will be further explained and illustrated below through specific embodiments.

[0011] Referring to the attached drawings, this utility model provides an inflatable blocking type bellows sealing structure, characterized by a water seal dynamic ring 1, a water seal stationary ring 2, a bellows 3, and an inflatable blocking assembly; The inflation blocking assembly includes a pneumatic tire seat 4.1, a pneumatic tire cover 4.2, a pneumatic tire 4.3, and a pneumatic tire inner frame 4.4. The pneumatic tire seat 4.1 is installed on the stern shaft 5 of the ship. The pneumatic tire 4.3 is installed inside the pneumatic tire seat 4.1. The pneumatic tire inner frame 4.4 is installed in the pneumatic tire 4.3. The pneumatic tire cover 4.2 is installed on the pneumatic tire seat 4.1 on the outside of the pneumatic tire 4.3. An air passage 4.5 is connected in the pneumatic tire seat 4.1, which leads to the pneumatic tire 4.3. The pneumatic tire seat 4.1 is connected to the stern shaft tube 7.

[0012] The ship's stern shaft 5 is equipped with a water seal moving ring 1 and a water seal stationary ring 2; The two ends of the bellows 3 are connected to the water seal ring 2 and the pneumatic tire seat 4.1 respectively, and fixed with clamps 6.

[0013] This invention is not used when the water seal of bellows 3 is functioning normally; the air tire 4.3 is in a deflated state. When the water seal of bellows 3 fails and needs replacement, the compressed air valve is opened to inject compressed air at a certain pressure (0.1~0.2MPa) into the cavity of the air tire 4.3, causing the air tire to expand and thus tighten the stern shaft; this prevents water from entering the stern shaft tube and also prevents water from entering the hull; once the water is blocked, maintenance work such as replacing parts of the bellows water seal can be performed. After maintenance is completed, the pressure inside the air tire is released, thus restoring the bellows to its working state.

Claims

1. An inflatable, blocking type bellows sealing structure, characterized in that, Water seal rotating ring, water seal stationary ring, bellows, and air-filled blocking assembly; The inflation blocking assembly includes a pneumatic tire seat, a pneumatic tire cover, a pneumatic tire, and a pneumatic tire inner frame. The pneumatic tire seat is installed on the stern shaft of the ship. Inside the pneumatic tire seat, a pneumatic tire is provided. Inside the pneumatic tire, a pneumatic tire inner frame is provided. On the outside of the pneumatic tire, on the pneumatic tire seat, a pneumatic tire cover is installed. An air passage is connected in the pneumatic tire seat to the pneumatic tire. The ship's stern shaft is equipped with a water seal dynamic ring and a water seal stationary ring; The two ends of the bellows are connected to the water seal stationary ring and the air tire seat, respectively.

2. The air-filled, blocking bellows sealing structure according to claim 1, characterized in that, The pneumatic tire seat is connected to the stern tube.

3. The air-filled, blocking bellows sealing structure according to claim 1, characterized in that, The corrugated pipe is connected to the outside of the water seal stationary ring and the pneumatic tire seat by clamps.

Images