CN204884686U

CN204884686U - Vertical watertight difference twin transposition cable

Info

Publication number: CN204884686U
Application number: CN201520589967.8U
Authority: CN
Inventors: 邓海军; 刘景光; 徐庭元; 徐海敏; 沈建强
Original assignee: Jiangsu Zhongmei Cable Co Ltd
Current assignee: Jiangsu Zhongmei Cable Co Ltd
Priority date: 2015-08-07
Filing date: 2015-08-07
Publication date: 2015-12-16
Anticipated expiration: 2025-08-07

Abstract

The utility model discloses a vertical watertight difference twin transposition cable, including a cable core, the cable core strand the first shielding layer of the crowded package in back each other by three twin transposition cables in center to constitute around package round twin transposition cable outside the secondary shielding layer again, EVA rubber is filled by the department in the space of cable core, crowds package inner sheath, third shielding layer outside the cable core in proper order, the butyl rubber water layer that coats outside the third shielding layer, outmost crowded packet of oversheath. The utility model discloses having very strong anti -interference ability, also not receiving inside paired line to influence and the unstable scheduling problem of signal transmission appears simultaneously, the cable possess watertightness - performance simultaneously for the use of hydraulic environment can be had.

Description

A kind of direction waterproof difference pair cable

Technical field

The utility model relates to field of cable technology, particularly relates to a kind of direction waterproof difference pair cable.

Background technology

Difference pair cable; general as signal cable; such cable is Signal transmissions instrument; because signal intensity when transmitting is very little, by the impact of outside interference signal time in order to ensure Signal transmissions, the outside of such cable can arrange one deck screen usually; screen is generally braiding copper mesh or copper pool (aluminium); screen needs ground connection, and external interference signal can be imported the earth by this layer, avoids interference signal and enters the loss that inner conductor interference reduces signal transmission simultaneously.

Along with the development of marine industries, the difference pair cable with communication function requires also along with raising, and its subject matter has following 3 points:

1, the difference pair cable had will be used in the seawater of certain hydraulic pressure, therefore cable is needed to have the function of direction waterproof but the difference pair cable of current not watertight, in the hydraulic test, adopt the difference pair cable of prior art to pass through, its conductor, cable part all have elutriation and go out;

2, the difference pair cable of prior art is established in the seawater in the environment of seawater and is used, and itself has the performance of salt spray resistance, therefore reduces useful life;

3, in prior art, cable conductor outer setting has one deck screen, simultaneously to adopt same pitch to carry out stranded for each twisted-pair feeder, although outside signal disturbing effectively can be completely cut off, but the signal of inside also exists certain impact, can increase the loss of signal transmission, the pitch of each twisted-pair feeder is the same in addition, add the probability of the cross-talk between twisted-pair feeder, what also make in signals transmission is unintelligible simultaneously.

Utility model content

The utility model is in order to solve the problem of prior art, provide a kind of direction waterproof difference pair cable, solving difference pair cable in prior art and cannot realize the performance of watertight, easily there is the problem affected between cross-talk, internal signal in the inside simultaneously solving cable in prior art.

A kind of direction waterproof difference pair cable described in the utility model, comprises cable core, extrudes the first screen and form at the outer wrapped circle pair cable of secondary shielding layer after described three, cable core Shi You center pair cable is mutually stranded; Fill EVA rubber in the gap of cable core, extrude inner sheath, the 3rd screen outward successively at cable core; Apply butyl rubber water layer outward at the 3rd screen, outermost layer extrudes oversheath.

Further improvement, described pair cable is made up of one group of pair twist insulated wire cores and the first screen be extruded in outside insulated wire cores.

Further improvement, EVA rubber is filled in the gap of described pair cable.

Further improvement, described insulated wire cores is made up of conductor and the rubber insulation be extruded in outside conductor.

Further improvement, described conductor is made up of many copper wires and EVA rubber.

Compared with prior art, the utility model beneficial effect is:

1, the utility model all inserts the EVA rubber of thawing in the synnema of cable, multiple twin, cabling process, and EVA rubber cools in atmosphere naturally, facilitates following process; Extruding in process, EVA rubber and insulation or sheath sulfuration simultaneously, such that cable is inside and outside to be closely linked, achieving the water stop function of the water stop function cable of cable; Because EVA rubber is not containing noxious substance, do not produce toxic gas in combustion, the amount of being fuming is little simultaneously, thus realizes the low-pressure halogen-free function of cable.

2, in order to ensure that twisted-pair feeder inside does not influence each other, the outside of each twisted-pair feeder all arranges one deck screen, the twisted-pair feeder of cable inside can not be had an impact to other twisted-pair feeder, cable is provided with two-layer screen altogether simultaneously, ensures the stable and reduction loss of signal of signal transmission between cable inner twisted pairs to greatest extent; In order to ensure that the possibility of cross-talk does not occur a twisted-pair feeder, each multiple twin cabling lay ratio is all different, even if to ensure that cross-talk occurs cable, also can not have an impact to other cores of cable.

3, in order to ensure cable shield function, the jacket structure that cable have employed " inside protect+shield+protect outward ", in order to ensure that this structure can have water stop function, butyl rubber water layer is coated with after inner sheath has woven screen outward, then oversheath is extruded with, protect in sulfuration makes and protect and combine closely outward extruding butyl glue in process, thus achieve the block-water performance of cable cover(ing).

4, the utility model has very strong interference free performance, and also do not occur the problems such as Signal transmissions instability by inner twisted pairs affects, cable has watertightness performance simultaneously, and the environment made it possible to having hydraulic pressure uses simultaneously.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Embodiment

A kind of direction waterproof difference pair cable as shown in Figure 1, comprises cable core, extrudes the first screen and form at the outer wrapped circle pair cable of secondary shielding layer 5 after described three, cable core Shi You center pair cable is mutually stranded; Described pair cable is made up of one group of pair twist insulated wire cores and the first screen 4 be extruded in outside insulated wire cores, then fills EVA rubber 1 in the gap of pair cable; Wherein, described insulated wire cores is made up of conductor and the rubber insulation 3 be extruded in outside conductor; Described conductor is made up of many copper wires 2 and EVA rubber 1; Fill EVA rubber 1 in the gap of cable core again, extrude inner sheath 6, the 3rd screen 7 outward successively at cable core; Apply butyl rubber water layer 8 outward at the 3rd screen, outermost layer extrudes oversheath 9.

The utility model embody rule approach is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.

Claims

1. a direction waterproof difference pair cable, comprises cable core, it is characterized in that: extrude the first screen after described three, cable core Shi You center pair cable is mutually stranded and form at the outer wrapped circle pair cable of secondary shielding layer; Fill EVA rubber in the gap of cable core, extrude inner sheath, the 3rd screen outward successively at cable core; Apply butyl rubber water layer outward at the 3rd screen, outermost layer extrudes oversheath.

2. direction waterproof difference pair cable according to claim 1, is characterized in that: described pair cable is made up of one group of pair twist insulated wire cores and the first screen be extruded in outside insulated wire cores.

3. direction waterproof difference pair cable according to claim 2, is characterized in that: EVA rubber is filled in the gap of described pair cable.

4. direction waterproof difference pair cable according to claim 2, is characterized in that: described insulated wire cores is made up of conductor and the rubber insulation be extruded in outside conductor.

5. direction waterproof difference pair cable according to claim 4, is characterized in that: described conductor is made up of many copper wires and EVA rubber.