Longitudinal watertight control cable

Abstract

The invention discloses a longitudinal watertight control cable, which comprises a cable core, wherein the cable core is formed by reversely twisting insulated wire cores by a '1+6+12' structure; a butyl glue layer is arranged in a gap of the cable core; an inner sheath which is 0.25-0.5cm thick is extruded outside the cable core; a metal braid layer which is 0.3-0.5cm thick is braided outside the inner sheath; the butyl glue layer coats the outside of the metal braid layer; and an outer sheath which is 0.6-1.2cm thick is extruded on the outermost layer of the cable core. By the structure, the weight of the cable is reduced; the outer diameter is reduced; use of raw materials is reduced; meanwhile, the cable has a watertight function; the anti-electromagnetic interference capability of the cable is improved; and meanwhile, other cables are not affected.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a longitudinal watertight control cable. Background technique [0002] With the development of the marine industry, various control cables are also used in ships and diving equipment. 2. Control cables are mainly used to transmit control and measurement signals. During the signal transmission process, they are susceptible to electrical interference. The interference mainly has two aspects: (1) Static interference generated by the capacitive coupling between the applied voltage and the wire core; [0003] (2) Electromagnetic induction interference generated by energized current. When there are high-voltage and high-current interference sources nearby, the electrical interference will be more serious. Since the distance between the cores of the same cable is small, the degree of interference is much greater than that of adjacent cables laid in parallel. [0004] In order to make t...

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Problems solved by technology

[0003] (2) Electromagnetic induction interference generated by energized current

[0010] (1) When the grounding wire core scheme is adopted, a certain amount of interference voltage can be reduced, but when there is an external high-voltage, high-current interference source close to this type of control cable, it will affect the normal use of the cable;

[0011] (2) Shielding is used to weaken and prevent electrical interference. However, when used in ships and diving equipment, although multi-layer shielding has good anti-interference ability, it also increases the weight of the cable itself, which is not suitable for cables in this case. In the middle of the use, while increasing the cost of the cable, the cost increased by about 20%

[0012] (3) Due to the use environment of ships and diving equipment, cables are required to have longitudinal watertight function. Existing cables do not have longitudinal watertight function. Especially when used in diving equipment, the general control cables are connected to several cabins. After water enters and closes the cabin door, the control cable without watertight function will cause water to enter other cabins

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