Movable sealing device for bridge rope penetrating pipeline and construction method of movable sealing device

Abstract

The invention discloses a movable sealing device for a bridge rope penetrating pipeline. The movable sealing device is characterized in that the device comprises a first rubber ring, a second rubber ring and a flexible soil engineering film, the first rubber ring is cohered and wound at the end of the outer side of the pipeline, the second rubber ring is cohered and wound on a drawing rope, the flexible soil engineering film forms a cone by the aid of a welding process, the cone is provided with a small end and a large end, the large end of the flexible soil engineering film is connected withthe first rubber ring, and the small end of the flexible soil engineering film is connected with the second rubber ring. The movable sealing device has sealing effects and good durability and economy,can sufficiently adapt to relative displacement between the pipeline and the rope and is low in manufacturing cost. The sealing device can be used for closing a pipeline of a new construction bridgeand can also be widely applied to closed maintenance of a pipeline of a built bridge.

Description

technical field [0001] The invention belongs to the new technical field of bridge engineering involved in civil engineering, and in particular relates to a movable sealing device for a bridge passing through a cable pipeline. Background technique [0002] With the rapid development of bridge technology in my country, steel box girders and cable systems are increasingly used in long-span bridge structures. [0003] In the application of steel structures, in order to maintain the dryness of the inner space of the steel box girder and ensure the durability of the steel structure, it is generally necessary to seal the inner box space of the steel box girder and dehumidify the air sealed therein. However, the stay cables participating in the structural stress in the bridge need to pass through the box girder, and the openings of the box girder through which these stay cables pass will become the channel for external moist air to enter the girder. [0004] At present, for this ty...

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Problems solved by technology

[0007] The first method is the most widely used in China, but the rubber sealing strip that plays a key sealing role is due to the uninterrupted vibration caused by the long-term vehicle load between the cable and the casing, the rubber sealing strip is rapidly aging, and the actual sealing effect is poor.

[0008] In the second way, the flexible aluminum alloy airbag plays a good buffer role and can effectively seal the air, but its cost is relatively high and its popularity is poor

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