Unidirectional expansion type horizontal rotating cable expansion device

Abstract

The invention belongs to the technical field of cable expansion devices, and particularly relates to a horizontal rotating cable expansion device which is mainly composed of an expansion chain arranged on bridge box girders. The horizontal rotating cable expansion device is characterized in that the expansion chain comprises a head expansion joint arranged on the first bridge box girder, a tail expansion joint, a middle expansion joint, a first connecting mechanism connected between the head expansion joint and the middle expansion joint, a second connecting mechanism connected between the middle expansion joint and the tail expansion joint and a third connecting mechanism connected between the tail expansion joint and the second bridge box girder. According to the unidirectional expansion type horizontal rotating cable expansion device, the protection effect on a cable is obvious, the problem that the cable is prone to excessive extrusion and breakage in cross-sea bridge running is completely eradicated, therefore, cable running is safe, the sustainable power supplying purpose is achieved, and later overhauling and maintaining are both very convenient; compared with submarine cable laying, the cost is low, and the very high economic benefit is achieved.

Description

technical field [0001] The invention belongs to the technical field of cable expansion devices, in particular to a one-way telescopic horizontal rotation cable expansion device. Background technique [0002] With the rapid development of the economy, the connection between the offshore islands and the mainland and between the bays is getting closer and closer. Therefore, the birth of the cross-sea bridge not only solves the problems of power supply and water supply on the islands, but also solves the problems of personnel exchanges and cargo transportation. It can be said to kill three birds with one stone. Compared with laying expensive submarine cables, using cross-sea bridges to lay long-distance cables can lay cables with larger interface sections and deliver greater capacity of electric energy to islands. Moreover, conventional cables are laid on the bridge, and the cables are laid in the bridge, which is convenient for inspection and maintenance, which not only improv...

AI Technical Summary

Problems solved by technology

[0004] 1. The current cable telescopic devices basically use the cable as a force transmission tool, and rely on the bending of the cable to drive the telescopic device to move. The entire movement process is that the cable is compressed and stretched, which can easily cause excessive fatigue of the cable and excessive tension of the cable. Squeezing and excessive stretching will cause great damage to the cable, which is a taboo in the use of cables, so that the cable expansion device does not play a good role in protecting the cable;

[0005] 2. Cables with different voltages cannot be protected by the same set of telescopic devices in upper and lower layers.

Sea-crossing cables work in high-temperature, high-salt, and high-humidity environments, and dust is unavoidable during operation. Ordinary guide wheels or ordinary shaft products will soon be rusted or dusty, making the movement of the sliding part inflexible or appearing. Stuck phenomenon, which disables the entire device

Especially when the production of PTFE is applied to the sliding part, when the device encounters an external force and deforms slightly, the PTFE product will be damaged and lose the sliding effect it should play. Polytetrafluoroethylene in such a harsh environment Tetrafluoroethylene products will age quickly, making the device unusable, so the device using this material is not advisable, because there are too many limitations, and the device cannot be used if the bridge body shakes a little bit, which will bring troubles to repair and maintenance. to a lot of inconvenience;

[0007] 4. For the special position of some bridge boxes of the cross-sea bridge, there is no special cable expansion device available for use

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