CN217134044U - Control cable - Google Patents

Abstract

The utility model discloses a control cable, which comprises a plurality of core bodies, a first inner sheath, a second inner sheath and an outer sheath which are coaxially arranged from inside to outside in sequence, wherein the core bodies are divided into a first layer core body, a second layer core body and a third layer core body from inside to outside, said first layer of core being disposed within said first inner sheath, said second layer of core being disposed between said first inner sheath and said second inner sheath, a plurality of said cores forming said second layer of core around the periphery of said first inner sheath, the third layer of cores being disposed between the second inner sheath and the outer sheath, the plurality of cores forming the third layer of cores around an outer periphery of the second inner sheath, this control cable adopts the mode of multilayer inner sheath to make the structure of this control cable multilayer core more closely knit, and this control cable's mechanical strength is high, stable in structure.

Description

Control cable

Technical Field

The utility model is used for cable technical field especially relates to a control cable.

Background

The control cable has the characteristics of moisture resistance, corrosion resistance, damage prevention and the like, can be laid in a tunnel or a cable trench, has the defects of mechanical damage, insulation moisture, insulation aging deterioration, overvoltage, cable overheating and the like in the common faults of a control cable line in the using process, and requires to adopt a cable with higher flame retardant grade in the engineering construction fireproof standard along with the development of science and technology and the requirements of working and living of people, according to the stability and safety analysis of the existing cable, the flame retardant B1 grade cable is the best choice, the flame retardant B1 grade cable examines the flame spread height of the flame retardant B grade cable, and also examines the series items of heat release, smoke generation characteristics, single combustion, smoke density, combustion drippage/particle grade, smoke toxicity grade, corrosivity and the like of the cable, but the structure of the existing control cable with the special-shaped core number is unstable, so that the cable can not pass the B1 test and is difficult to meet the requirement of flame-retardant B1 cable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a control cable, its mechanical strength is high, stable in structure.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a control cable, includes many cores and from interior to exterior first inner sheath, second inner sheath and the oversheath of coaxial setting in proper order, many the core from interior to exterior divide into first layer core, second floor core and third layer core, the first layer core is established in the first inner sheath, the second floor core is established first inner sheath with between the second inner sheath, many the core is around the periphery of first inner sheath forms second floor core, the third layer core is established the second inner sheath with between the oversheath, many the core is around the periphery of second inner sheath forms the third layer core.

Preferably, the first layer core comprises an inner layer core and an outer layer core, the inner layer core comprises one core, the outer layer core comprises six cores, the inner layer core is located in the middle of the first layer core, the outer layer core surrounds the periphery of the inner layer core, and the cores are arranged in parallel.

Preferably, the core body sequentially comprises a conductor, a fire-resistant layer wrapped on the conductor and an insulating layer extruded on the fire-resistant layer from inside to outside.

Preferably, the outer surface of the third-layer core body is provided with a first flame-retardant layer, and the first flame-retardant layer comprises synthetic fibers wrapped on the third-layer core body.

Preferably, the outer surface of the first flame-retardant layer is provided with a heat-insulating layer, and the heat-insulating layer comprises a glass fiber tape wrapped on the first flame-retardant layer.

Preferably, a woven layer is arranged between the heat insulation layer and the outer sheath, and the woven layer is woven by tinned copper wires.

Preferably, the outer surface of weaving layer is equipped with the fire-retardant layer of second, the fire-retardant layer of second is including lapping synthetic fiber on weaving layer.

Preferably, the outer sheath is a B1-grade halogen-free low-smoke outer sheath extruded on the second flame-retardant layer.

Preferably, the first inner sheath and the second inner sheath are cross-linked polyolefin materials.

Preferably, the second layer core comprises 13 core bodies, and the third layer core comprises 20 core bodies.

One of the above technical solutions has at least one of the following advantages or beneficial effects: this control cable is through the first layer core, first inner sheath, second floor core, second inner sheath, third layer core and the oversheath of coaxial setting in proper order from interior to exterior, and first inner sheath, second inner sheath and oversheath are in the same place many inseparable interlocks of core, make each core keep balanced stable, and this control cable adopts the mode of multilayer inner sheath to make the structure of this control cable multilayer core more closely knit, and this control cable's mechanical strength is high, stable in structure.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it does not indicate or suggest that the indicated technical features must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

In the utility model, the meaning of "several" is one or more, the meaning of "a plurality of" is more than two, "greater than", "less than", "exceed" and so on are understood as not including the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise explicitly defined, the terms "set", "install", "connect", and the like are to be understood in a broad sense, and for example, may be directly connected or may be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

The embodiment of the utility model provides a control cable, refer to fig. 1, including many cores 100 and from inside to outside in proper order coaxial arrangement's first inner sheath 200, second inner sheath 300 and oversheath 800, many cores 100 divide into first layer core 110, second layer core 120 and third layer core 130 from inside to outside, first layer core 110 is established in first inner sheath 200, second layer core 120 is established between first inner sheath 200 and second inner sheath 300, many cores 100 form second layer core 120 around the periphery of first inner sheath 200, third layer core 130 is established between second inner sheath 300 and oversheath 800, many cores 100 form third layer core 130 around the periphery of second inner sheath 300, this control cable adopts the mode of multilayer inner sheath to make the multilayer core closely interlock together, make each core 100 keep balanced stable, make this control cable's structure denser, the control cable is high in mechanical strength and stable in structure.

Referring to fig. 1, the first-layer core 110 includes an inner-layer core 101 and an outer-layer core 102, the inner-layer core 101 includes one core 100, the outer-layer core 102 includes six cores 100, the inner-layer core 101 is located at a middle position of the first-layer core 110, the outer-layer core 102 is disposed around the outer periphery of the inner-layer core 101, and the cores 100 are disposed in parallel.

Referring to fig. 1, the core body 100 sequentially comprises a conductor 140, a fire-resistant layer 150 wrapped on the conductor 140, and an insulating layer 160 wrapped on the fire-resistant layer 150 from inside to outside, wherein the fire-resistant layer 150 and the insulating layer 160 wrap the core body 140 to improve fire resistance and insulating property.

Referring to fig. 1, the outer surface of the third layer core 130 is provided with a first flame retardant layer 400, the first flame retardant layer 400 comprises synthetic fibers wrapped on the third layer core 130, the first flame retardant layer 400 has high flame retardancy and fire resistance of the control cable, and the structure of the control cable is more compact and stable.

Referring to fig. 1, preferably, the outer surface of the first flame-retardant layer 400 is provided with a heat-insulating layer 500, the heat-insulating layer 500 comprises a glass fiber tape wrapped on the first flame-retardant layer 400, the heat-insulating layer can play a heat-insulating role, the safety performance is high, and the structure of the control cable can be more compact and stable.

Referring to fig. 1, be equipped with weaving layer 600 between insulating layer 500 and oversheath 800, weaving layer 600 is woven by the tinned copper wire and is formed, and weaving layer 600 makes this control cable's structure closely knit stable more.

Referring to fig. 1, the surface of weaving layer 600 is equipped with the fire-retardant layer 700 of second, and the fire-retardant layer 700 of second is including lapping the synthetic fiber on weaving layer 600, and the fire-retardant layer 700 of second has improved this control cable's fire resistance and fire resistance, and has made this control cable's structure closely knit stable more.

Referring to fig. 1, the outer sheath 800 is a B1-grade halogen-free low-smoke outer sheath extruded on the second flame-retardant layer 700, so that the low-release property of the control cable is improved.

In a preferred embodiment of the present invention, the second layer core 120 includes 13 cores 100, the third layer core 130 includes 20 cores 100, and the control cable has 40 cores 100.

The materials used by the control cable are all easily available on the market, the conductor 140 is composed of a plurality of copper conductors subjected to annealing treatment, the fire-resistant layer 150 is made of a phlogopite material, the insulating layer 160 is a halogen-free low-smoke insulating material, preferably, the insulating layer 160 is a cross-linked polyolefin material, the first inner sheath 200 and the second inner sheath 300 are halogen-free low-smoke materials, preferably, the first inner sheath 200 and the second inner sheath 300 are cross-linked polyolefin materials, the first fire-resistant layer 400 and the second fire-resistant layer 700 are synthetic fiber materials, the heat-insulating layer 500 is made of a glass fiber material, the braided layer is woven by a tin-plated copper wire material, and the outer sheath 800 is a B1-grade halogen-free low-smoke material, so that the control cable has high fire resistance, fire resistance and low release performance.

In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. A control cable, characterized by: including many cores and from interior to exterior first inner sheath, second inner sheath and the oversheath of coaxial setting in proper order, many the core from interior to exterior divide into first layer core, second floor core and third layer core, the first layer core is established in the first inner sheath, second floor core is established first inner sheath with between the second inner sheath, many the core centers on the periphery of first inner sheath forms second floor core, third layer core is established the second inner sheath with between the oversheath, many the core centers on the periphery of second inner sheath forms the third layer core.

2. The control cable of claim 1, wherein: the first layer core includes inlayer core and outer core, the inlayer core includes one the core, outer core includes six the core, the inlayer core is located the intermediate position department of first layer core, outer core is around setting up the periphery of inlayer core, many core parallel arrangement.

3. The control cable of claim 1, wherein: the core body sequentially comprises a conductor, a fire-resistant layer wrapped on the conductor and an insulating layer extruded on the fire-resistant layer from inside to outside.

4. The control cable of claim 1, wherein: the outer surface of the third layer core body is provided with a first flame-retardant layer, and the first flame-retardant layer comprises synthetic fibers wrapped on the third layer core body.

5. The control cable of claim 4, wherein: the outer surface of the first flame-retardant layer is provided with a heat-insulating layer, and the heat-insulating layer comprises a glass fiber tape wrapped on the first flame-retardant layer.

6. The control cable of claim 5, wherein: a woven layer is arranged between the heat insulation layer and the outer sheath, and the woven layer is woven by tinned copper wires.

7. The control cable of claim 6, wherein: the surface of weaving layer is equipped with the fire-retardant layer of second, the fire-retardant layer of second is including lapping synthetic fiber on the weaving layer.

8. The control cable of claim 7, wherein: the outer sheath is a B1-grade halogen-free low-smoke outer sheath extruded on the second flame-retardant layer.

9. The control cable of claim 1, wherein: the first inner sheath and the second inner sheath are cross-linked polyolefin materials.

10. The control cable of claim 1, wherein: the second layer core comprises 13 core bodies, and the third layer core comprises 20 core bodies.

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