阅读说明：本技术 一种三层共挤交联聚乙烯绝缘控制电缆 (Three-layer co-extrusion crosslinked polyethylene insulated control cable ) 是由 宋磊 刘凯 张奇影 周建洲 时兆前 易林贵 于 2020-06-18 设计创作，主要内容包括：本发明涉及电缆技术领域,具体涉及一种三层共挤交联聚乙烯绝缘控制电缆,包括数根导体,数根导体的外侧依次挤包有内半导电层、绝缘层以及外半导电层；多根所述导体的外侧设置有成缆绕包层,所述成缆绕包层的外侧设置有总屏蔽层,所述总屏蔽层的外侧设置有第一护套层和第二护套层；所述第一护套层的外侧圆周上均匀设置有多个缓冲凸起,所述第二护套层内侧圆周上均匀设置有与所述缓冲凸起相互配合的缓冲凹槽,所述缓冲凸起的侧壁上一体设置有第一缓冲纹,所述缓冲凹槽的内壁上设置有第二缓冲纹；本发明结构灵巧,具备优异的吸收外界冲击力和抗挤压性能。(The invention relates to the technical field of cables, in particular to a three-layer co-extrusion cross-linked polyethylene insulated control cable which comprises a plurality of conductors, wherein the outer sides of the plurality of conductors are sequentially extruded and wrapped with an inner semi-conducting layer, an insulating layer and an outer semi-conducting layer; a cabling wrapping layer is arranged on the outer sides of the conductors, a main shielding layer is arranged on the outer side of the cabling wrapping layer, and a first sheath layer and a second sheath layer are arranged on the outer side of the main shielding layer; a plurality of buffering bulges are uniformly arranged on the circumference of the outer side of the first sheath layer, buffering grooves matched with the buffering bulges are uniformly arranged on the circumference of the inner side of the second sheath layer, first buffering grains are integrally arranged on the side walls of the buffering bulges, and second buffering grains are arranged on the inner walls of the buffering grooves; the invention has smart structure and excellent performance of absorbing external impact force and resisting extrusion.)

1. The utility model provides a three-layer is crowded crosslinked polyethylene insulation control cable altogether, includes several conductors (1), its characterized in that: the outer sides of a plurality of conductors (1) are sequentially extruded with an inner semi-conducting layer (2), an insulating layer (3) and an outer semi-conducting layer (4); a cabling lapping layer (5) is arranged on the outer side of the conductors (1), a total shielding layer (6) is arranged on the outer side of the cabling lapping layer (5), and a first sheath layer (7) and a second sheath layer (8) are arranged on the outer side of the total shielding layer (6); evenly be provided with a plurality of buffering archs (9) on the outside circumference of first restrictive coating (7), evenly be provided with on the inboard circumference of second restrictive coating (8) with buffering protruding (9) buffering recess (10) of mutually supporting, an organic whole is provided with first buffering line (11) on the lateral wall of buffering arch (9), be provided with second buffering line (12) on the inner wall of buffering recess (10).

2. The three-layer co-extrusion crosslinked polyethylene insulated control cable according to claim 1, characterized in that: the total shielding layer (6) is braided and shielded by adopting tinned copper wires, and the braiding density is not lower than 90%.

3. The three-layer co-extrusion crosslinked polyethylene insulated control cable according to claim 1, characterized in that: the inner semi-conducting layer (2), the insulating layer (3) and the outer semi-conducting layer (4) are of a three-layer co-extrusion structure.

4. The three-layer co-extrusion crosslinked polyethylene insulated control cable according to claim 1, characterized in that: the cross section of the first buffering lines (11) is in a plurality of semi-circles, and the cross section of the second buffering lines (12) is the same as that of the first buffering lines (11).

5. The three-layer co-extrusion crosslinked polyethylene insulated control cable according to claim 4, characterized in that: the positions of the first buffer veins (11) and the second buffer veins (12) are staggered.

6. The three-layer co-extrusion crosslinked polyethylene insulated control cable according to claim 1, characterized in that: in the direction of the control cable axis, the length of the buffering bulge (9) is equal to that of the first sheath layer (7).

Technical Field

The invention relates to the technical field of cables, in particular to a three-layer co-extrusion crosslinked polyethylene insulated control cable.

Background

The control cable is suitable for industrial and mining enterprises, energy traffic departments, and occasions such as control and protection lines with the AC rated voltage of below 450/750 volts.

With the development of the times, more and more electric appliances need control cables for circuit control, but the control cables have poor extrusion resistance, almost have no capacity of absorbing external impact force, and are easily extruded, deformed and even damaged.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a three-layer co-extrusion crosslinked polyethylene insulated control cable which is flexible in structure and has excellent external impact force absorption and extrusion resistance.

In order to achieve the purpose, the invention provides the following technical scheme: a three-layer co-extrusion cross-linked polyethylene insulated control cable comprises a plurality of conductors, wherein the outer sides of the plurality of conductors are sequentially extruded and wrapped with an inner semi-conducting layer, an insulating layer and an outer semi-conducting layer; a cabling wrapping layer is arranged on the outer sides of the conductors, a main shielding layer is arranged on the outer side of the cabling wrapping layer, and a first sheath layer and a second sheath layer are arranged on the outer side of the main shielding layer; evenly be provided with a plurality of buffering archs on the outside circumference of first restrictive coating, evenly be provided with on the inboard circumference of second restrictive coating with the protruding buffering recess of mutually supporting of buffering, an organic whole is provided with first buffering line on the bellied lateral wall of buffering, be provided with second buffering line on the inner wall of buffering recess.

Furthermore, the total shielding layer is formed by weaving a tinned copper wire for shielding, and the weaving density is not lower than 90%.

According to the technical scheme, the control cable can be ensured to have excellent capacity of resisting external current interference.

Further, the inner semi-conducting layer, the insulating layer and the outer semi-conducting layer are of a three-layer co-extrusion structure.

According to the technical scheme, the interior of the control cable can be guaranteed to be compact, the section size is smaller, and the space is saved for the installation of the control cable.

Furthermore, the cross section of the first buffering lines is in a plurality of semi-circles, and the cross section of the second buffering lines is the same as that of the first buffering lines.

According to the technical scheme, the semicircular section facilitates relative movement of the first buffering grains and the second buffering grains.

Further, the positions of the first buffering lines and the second buffering lines are staggered with each other.

According to the technical scheme, the first buffering grains and the second buffering grains are staggered from each other, so that the friction force between the first buffering grains and the second buffering grains can be increased, and more impact force can be absorbed.

Further, in the direction of the control cable axis, the length of the buffering protrusion is equal to the length of the first sheath layer.

According to the technical scheme, the control cable has better anti-extrusion performance on the whole length.

Compared with the prior art, the invention has the beneficial effects that: through be provided with buffering arch and the buffering recess of mutually supporting on first restrictive coating and second restrictive coating, when control cable received the extrusion, relative position and deformation can take place for first buffering line and second buffering line that are located on buffering arch and the buffering recess to absorb certain impact force, make control cable possess better anti extrusion performance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged schematic view of a point a in fig. 1.

In the figure: 1. a conductor; 2. an inner semiconductive layer; 3. an insulating layer; 4. an outer semiconducting layer; 5. a cabling lapping layer; 6. a total shielding layer; 7. a first jacket layer; 8. a second jacket layer; 9. a buffer protrusion; 10. a buffer groove; 11. a first buffer pattern; 12. and a second buffer pattern.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.

Example one

Referring to fig. 1 and 2, the present invention provides the following technical solutions: a three-layer co-extrusion cross-linked polyethylene insulated control cable comprises a plurality of conductors 1, wherein the outer sides of the conductors 1 are sequentially wrapped with an inner semi-conducting layer 2, an insulating layer 3 and an outer semi-conducting layer 4 in an extrusion manner; the insulating layer 3 is made of a cross-linked polyethylene material, and has more stable insulating property and excellent heat resistance; the outer sides of the conductors 1 are provided with cabling wrapping layers 5, the outer sides of the cabling wrapping layers 5 are provided with a total shielding layer 6, the cabling wrapping layers 5 can be made of non-woven fabrics and have good flame retardant performance, and the outer sides of the total shielding layer 6 are provided with a first sheath layer 7 and a second sheath layer 8; a plurality of buffering bulges 9 are uniformly arranged on the circumference of the outer side of the first sheath layer 7, buffering grooves 10 matched with the buffering bulges 9 are uniformly arranged on the circumference of the inner side of the second sheath layer 8, and the specific number of the buffering bulges 9 can be selected according to the overall dimension of the control cable and the dimension of the buffering bulges 9; the side wall of the buffering bulge 9 is integrally provided with a first buffering grain 11, and the inner wall of the buffering groove 10 is provided with a second buffering grain 12; when producing first restrictive coating 7 and second restrictive coating 8, can cooperate the production of extrusion molding mould, the inside shape of extrusion molding mould is the same with the outside shape of first restrictive coating 7, and the outside shape of extrusion molding mould is the same with the inside shape of second restrictive coating 8.

According to the above embodiments, specifically, referring to fig. 1 and fig. 2, the total shielding layer 6 is a tinned copper wire braided shield, the braiding density is not lower than 90%, and the excellent capability of resisting the external current interference of the control cable can be ensured.

According to the above embodiments, specifically, referring to fig. 1 and fig. 2, the inner semi-conductive layer 2, the insulating layer 3 and the outer semi-conductive layer 4 are a three-layer co-extrusion structure, which can ensure compact interior and smaller cross-sectional size of the control cable, and save space for installing the control cable.

According to the above embodiment, specifically, referring to fig. 1 and fig. 2, the cross section of the first cushion lines 11 is a plurality of semi-circular shapes, the cross section of the second cushion lines 12 is the same as the cross section of the first cushion lines 11, and the semi-circular cross section facilitates the relative movement of the first cushion lines 11 and the second cushion lines 12.

According to the above embodiment, specifically, referring to fig. 1 and fig. 2, the positions of the first buffering threads 11 and the second buffering threads 12 are staggered, and the mutual displacement of the positions of the first buffering threads 11 and the second buffering threads 12 can increase the friction force therebetween and absorb more impact force.

According to the above embodiment, specifically, referring to fig. 1 and fig. 2, in the direction of the axis of the control cable, the length of the buffering protrusion 9 is equal to the length of the first sheath layer 7, so that the control cable has a good anti-extrusion performance over the entire length thereof.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.