CN112037993A - An optoelectronic hybrid cable - Google Patents

Abstract

The invention belongs to the field of cables, and particularly relates to a photoelectric hybrid cable. It includes: the sheath layer, and the conducting wire group and the optical fiber group which are symmetrically arranged in the sheath layer; the cross section of the conductive wire group is circular, the cross section of the optical fiber group is oval, and the extension line of the long axis of the optical fiber group passes through the circle center of the conductive wire group; a special-shaped reinforcing part is also arranged in the sheath layer; the special-shaped reinforcing piece consists of a head part and a tail part; the head part is covered outside the conductive wire group and faces the end opening of the optical fiber group; the tail part is formed by a structure of two sections of elliptical arcs, is connected to two ends of the opening of the head part and is symmetrically arranged at the upper end and the lower end of the optical fiber line group. The invention forms a structure which takes the conductive wire group and the special-shaped reinforcing piece as main bearing acting force through the improvement of the structure, and protects the optical fiber group.

Description

An optoelectronic hybrid cable

technical field

The invention belongs to the field of cables, and in particular relates to an optoelectronic hybrid cable.

Background technique

Optical power cable (OPC) is an integrated transmission medium that organically combines conductive wires and optical fibers, and can transmit electrical energy and optical information at the same time, in the same path, and in the same direction. It realizes the integration of power flow and information flow. Through one erection, one construction, and one investment, it transmits voice, data, video and other information while transmitting power, which greatly shortens the construction period, reduces construction costs, and saves resources. .

However, in the existing optoelectronic hybrid cables, most of the optical fiber wires and the conductive wires are coaxially arranged, and the optical fiber wires are arranged at the axial center. When the conductive wires are subjected to electrical breakdown, the optical fiber is easily damaged. , resulting in interruption of optical signal transmission and network disconnection. Secondly, the way the optical fiber cable is arranged at the axis makes it easy to form a concentrated force on the optical fiber cable when the optical fiber cable is subjected to external pressure, resulting in mechanical damage to the optical fiber cable. It is also easy to Causes problems such as disconnection and disconnection.

SUMMARY OF THE INVENTION

In order to solve the problems that the existing optoelectronic hybrid cable is usually difficult to avoid damage to the optical fiber caused by partial electrical breakdown or overheating of the conductive wire, and/or the optical fiber cable is easily damaged by mechanical damage and causes network disconnection, the present invention provides an optoelectronic hybrid cable.

The purpose of this invention is to:

1) The conductive wire group and the optical fiber wire group are set in an asymmetric structure to avoid the problem of damage to the optical fiber wire group caused by the electrical breakdown of the conductive wire group;

2) Use the better mechanical properties of the conductive wire set to protect the optical fiber set;

3) The protection effect of the optical fiber group in the hybrid cable is further improved by setting the asymmetric structure of the reinforcement.

In order to achieve the above objects, the present invention adopts the following technical solutions.

An optoelectronic hybrid cable, comprising:

The sheath layer and the conductive wire group and the optical fiber wire group arranged symmetrically in the sheath layer;

The cross-section of the conductive wire group is circular, the cross-section of the optical fiber wire group is oval, and the extension line of the long axis of the optical fiber wire group cross-section passes through the center of the cross-section of the conductive wire group;

The radius of the conductive wire group is greater than the semi-minor axis of the optical fiber wire group;

A special-shaped reinforcement is also arranged in the sheath layer;

The special-shaped reinforcement is composed of two parts: a head part and a tail part;

The cross section of the head is arc-shaped, wrapped outside the conductive wire group, and opened toward the end of the optical fiber wire group;

The tail is composed of two sections of elliptical arc structures, which are respectively connected to both ends of the opening of the head, and are symmetrically arranged on the upper and lower ends of the optical fiber group with the long axis of the cross-section of the optical fiber group as the symmetry line.

As a preference,

The conductive wire group is composed of a first bundle of tubes covered with a plurality of conductive wires, and the cross-section of the first bundle of tubes is circular;

The optical fiber line group is composed of a second bundle tube covering a plurality of optical fiber wires, and the cross section of the second bundle tube is elliptical.

As a preference,

The set of conductive wires and the set of optical fibers are not in contact with each other and are not tangent to the outer edge of the jacket layer.

As a preference,

The elliptical arc of the tail portion is arched outwards away from the optical fiber line group.

As a preference,

An isolation layer is arranged outside the sheath layer, and the isolation layer is made of waterproof rubber.

As a preference,

A flame retardant layer is arranged outside the isolation layer, and the flame retardant layer is made of silicone rubber.

As a preference,

The jacket layer is also provided with an arched reinforcing member symmetrically arranged with the long axis of the optical fiber group as the line of symmetry.

As a preference,

The connecting line of the midpoint of the arched reinforcement passes through the center of the optoelectronic hybrid cable, and is perpendicular to the extension line of the long axis of the optical fiber group;

The arched reinforcement is arched outward, and the outer surface is tangent to the inner surface of the isolation layer.

The beneficial effects of the present invention are:

1) It can effectively avoid damage to the optical fiber caused by electrical breakdown;

2) Through the improvement of the structure, the conductive wire group is formed as the part that mainly bears the external mechanical force, and the optical fiber wire group is mechanically protected;

3) The protection effect of the optical fiber line group is further improved by the arrangement of the asymmetric reinforcement.

Description of drawings:

Fig. 1 is the structural representation of the present invention;

Fig. 2 is a kind of force schematic diagram of the present invention;

Fig. 3 is another kind of force schematic diagram of the present invention;

In the picture: 100 jacket layer, 200 conductive wire set, 201 conductive wire, 202 first bundle tube, 300 optical fiber wire set, 301 optical fiber wire, 302 second bundle tube, 400 special-shaped reinforcement, 401 head, 402 tail, 403 nodes, 500 isolation layers, 600 flame retardant layers, 700 arch reinforcements.

Detailed ways:

The present invention will be further described and described in detail below with reference to specific embodiments and accompanying drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention referred to in the following description are generally only some embodiments of the present invention, not all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined, the meaning of "several" means one or more.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Unless otherwise specified, the raw materials used in the embodiments of the present invention are commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the embodiments of the present invention are all methods mastered by those skilled in the art.

Example

An asymmetric structure optoelectronic hybrid cable as shown in Figure 1, which mainly includes:

The jacket layer 100, the conductive wire group 200 and the optical fiber wire group 300, the conductive wire group 200 and the optical fiber wire group 300 are symmetrically arranged in the jacket layer 100, and both the conductive wire group 200 and the optical fiber wire group 300 are completely covered by the jacket layer 100 The cladding and edge parts are not tangent or abutting with the outer edge of the sheath layer 100 , the line connecting the geometric centers of the two passes through the geometric center of the sheath layer 100 and the midpoint of the line coincides with the geometric center of the sheath layer 100 , as shown in Figure 1, the two are set horizontally and symmetrically;

The conductive wire group 200 is composed of a first bundle tube 202 covered with a plurality of conductive wires 201. The optical fiber wire group 300 is composed of a second bundle tube 302 coated with a plurality of optical fiber wires 301. The optical fiber wires 301 are covered by a non-woven fabric. Mode fiber or multimode fiber or fiber bundle;

The cross section of the first bundle tube 202 is circular, the cross section of the second bundle tube 302 is oval, the extension of the long axis of the cross section of the second bundle tube 302 passes through the center of the cross section of the first bundle tube 202, and the cross section of the optical fiber 301 is a circle shape, and the optical fiber 301 is tangent to the inner walls of both ends in the short-axis direction of the second bundle tube 302, and the bundle tube can be made of commonly used PBT materials, but is not limited to PBT;

The radius of the circular section of the first bundle tube 202 is R, the semi-major axis of the ellipse section of the second bundle tube 302 is a, and the semi-minor axis is b, which needs to satisfy |R-a|≤0.05×R, |R-a|≤ 0.05×a and R≥2b, in this embodiment, take R=a and R=2b;

Under this condition, when the hybrid cable is subjected to longitudinal pressure, it can form a force distribution that is beneficial to the optical fiber assembly 300, that is, the conductive wire assembly 200 serves as the main bearing part of the hybrid cable when the hybrid cable is subjected to stress, so as to prevent the optical fiber assembly 300 from being subjected to a large amount of stress. Compared with the optical fiber line group 300, the overall compression resistance of the conductive line group 200 is better than that of the optical fiber line group 300, and the performance is less affected, and the optical fiber line group 300 is effectively protected;

On the other hand, when a lateral force is applied to the hybrid cable, that is, the direction of the force acts on the hybrid cable along the long axis of the second bundle tube 302, due to the elliptical structure of the second bundle tube 302, the optical fiber set 300 has a certain deformation. margin, when subjected to pressure in this direction, the second bundle tube 302 in the optical fiber assembly 300 is compressed along the long axis of its cross-section, and a is gradually reduced. Before a is reduced to be equal to b, the optical fiber assembly 300 will not directly Under the force, the optical fiber cable 301 is well protected.

Further, the jacket layer 100 is also provided with a special-shaped reinforcing member 400, which is made of hard silica gel material;

The special-shaped reinforcing member 400 is composed of two parts, a head portion 401 and a tail portion 402. The special-shaped reinforcing member 400 is shown in FIG. 1. The cross-section of the head portion 401 is arc-shaped, and is coaxially arranged on the conductive wire group 200 without touching each other. In addition, it is provided with an opening toward the optical fiber set 300, and the opening angle is 60-90°. In this embodiment, the opening angle is 90°. The tail 402 is a structure with two sections of elliptical arcs, which are respectively connected to the head 401. The two ends of the opening are symmetrically arranged with the long axis of the section of the optical fiber group 300 as the symmetry axis. As shown in FIG. 1 , the tail ends are symmetrically arranged on the upper and lower ends of the optical fiber group 300, and the elliptical arc of the tail 402 faces away from the optical fiber group. 300 arched outwards.

The purpose of the special-shaped reinforcement 400 is to further improve the protection effect of the optical fiber group 300 under longitudinal or lateral pressure, and to disperse the force of part of the conductive wire group 200, so that the overall hybrid cable has better compression resistance, and the conductive wire Both group 200 and fiber optic line group 300 are not easily damaged;

In the case where the special-shaped reinforcing member 400 is not provided, when the optical cable is subjected to longitudinal pressure, although most of the force is concentrated on the conductive wire group 200, a part of the force still acts on the optical fiber wire group 300. The wire group 300 is easily squeezed by a large lateral pressure. After the special-shaped reinforcing member 400 is installed, when it is subjected to longitudinal pressure, the force originally acting on the optical fiber wire group 300 will be absorbed or weakened by the tail portion 402 of the special-shaped reinforcing member 400, reducing the The force of the optical fiber set 300 protects the optical fiber 301. When the hybrid cable is subjected to lateral pressure, although the left and right sides of the hybrid cable will still form a deformation difference, under the action of the tail 402 of the special-shaped reinforcement 400, the second bundle of The tube 302 is no longer simply deformed, but forms a tendency to move the guide wire set 200 , and the force on the tail 402 will be transmitted to the head 401 of the special-shaped reinforcement 400 , that is, the force part that will act on the optical fiber set 300 in disguise Guided to the conductive wire group 200, and the advantages of the conductive wire group 200 being more resistant to pressure and less damage are used to form a good protection for the optical fiber wire group 300;

When subjected to longitudinal pressure, specifically as shown in FIG. 2 , the longitudinal pressure F1 acts on the hybrid cable, and the sheath layer 100 first forms a tendency to compress and deform along the a-direction and expand along the b-direction, and transmit the force to the special-shaped reinforcement 400 , The head 401 of the special-shaped reinforcement 400 has a tendency to deform along the c1 direction, and the tail 402 has a tendency to deform along the c2 direction, and the c1 direction and the c2 direction are parallel, that is, the deformation trend of the head 401 and the tail 402 tends to be consistent in the initial state, However, since both are arc-shaped structures, the connection between the head 401 and the tail 402 is simultaneously affected by the head 401 and the tail 402 during the deformation process. In FIG. 2, the node 403 at the connection between the head 401 and the tail 402 receives a larger lateral force, so the head 401 will tend to close. The tail 402 of the special-shaped reinforcement 400 is set to the left side as the head The end and the right side are the tail ends. The closing of the head 401 will cause the head end of the tail 402 to also close inward, and the tail end will form a tendency to open, which reduces the deformation of the tail 402 in the direction of c2. Therefore, the special-shaped reinforcement is used. 400 is the demarcation point, the area outside the special-shaped reinforcement 400 in the hybrid cable is marked as A, and the area covered by the special-shaped reinforcement 400 is marked as B. Due to the barrier and deformation buffer of the special-shaped reinforcement 400, the area B is reduced. force, so that the deformation of area A along the longitudinal direction is greater than that of area B, and the deformation ratio of the two is increased from 1:1 to x:1 (x>1), resulting in a deformation difference, which makes the conductive wire group in area B 200 and the optical fiber line group 300 are actually less deformed and squeezed by the sheath layer 100, which improves the protection effect of the conductive line group 200 and the optical fiber line group 300;

On the other hand, when the optoelectronic hybrid cable is subjected to the lateral pressure F2, as shown in FIG. 3, the lateral pressure F2 acts on the hybrid cable, and the sheath layer 100 first undergoes lateral compression deformation along the d direction, and the tail 402 of the special-shaped reinforcement 400 The tail end is deformed along the e direction, and the head end is deformed along the f direction. The e direction and the f direction are parallel, but the actual deformation amount of the head end and the tail end is different, and the deformation range of the tail end is larger. At the same time, the head end has a deformation limit. The node 403 at the connection between the head end 402 of the rear part 402 of the reinforcement member 400 and the head part 401 of the special-shaped reinforcement member 400, the deformation of the node 403 will gradually approach the conductive wire group 200 until it can no longer be compressed and deformed. At this time, the conductive wire group 200 will form an alternative The force, that is, part of the force acts on the conductive wire group 200 through the tail portion 402 of the special-shaped reinforcement member 400, making it the main force-bearing part, as shown in FIG. In the area C covered by the 402 up and down symmetrically, the area C tends to be laterally compressed and shifted to the left, compared to the way in which the second bundle tube 302 in the optical fiber group 300 is directly squeezed when the special-shaped reinforcing member 400 is not provided , the area C reduces the degree of compression by offsetting the guide wire group 200, achieving the purpose of reducing the amount of compression of the second bundle tube 302 in the optical fiber group 300 along the long axis direction, and improving the protection effect of the optical fiber group 300 , and part of the force acts on the conductive wire group 200 through the special-shaped reinforcement 400, further reducing the actual force in the area C, and optimizing the force of the optical fiber group 300 to a great extent. Good protection is achieved.

further,

The sheath layer 100 is provided with a waterproof and moisture-proof isolation layer 500, which is made of waterproof rubber, and has a certain flexibility and insulation while playing the role of waterproof and moisture-proof;

further,

A flame retardant layer 600 is provided outside the isolation layer 500, and the flame retardant layer 600 is made of fire-resistant and insulating silicone rubber, and also has flexibility;

The jacket layer 100 is also provided with an arched reinforcing member 700 that is symmetrical up and down. The arched reinforcing member 700 is made of hard silicone material, and its cross-section is arc-shaped as shown in FIG. 1 . The connection line of the points passes through the center of the optoelectronic hybrid cable, and is perpendicular to the extension line of the long axis of the optical fiber group 300;

The arched reinforcement 700 is arched outward, and the outer surface is tangent to the inner surface of the isolation layer 500 .

The arrangement of the arched reinforcing member 700 can further reduce the stress on the optical fiber group 300 when the hybrid cable is subjected to longitudinal stress. Through the tendency of the two sides of the arched reinforcing member 700 to be lifted outward after being stressed, the second bundle of tubes The 302 is more difficult to be compressed along the short axis direction of the cross section, which squeezes the optical fiber 301, and at the same time plays the role of dispersing force and protecting the conductive wire group 200.

Claims (8)

1. A photoelectric hybrid cable, characterized in that, comprising: The sheath layer and the conductive wire group and the optical fiber wire group arranged symmetrically in the sheath layer; The cross-section of the conductive wire group is circular, the cross-section of the optical fiber wire group is oval, and the extension line of the long axis of the optical fiber wire group cross-section passes through the center of the cross-section of the conductive wire group; The radius of the conductive wire group is greater than the semi-minor axis of the optical fiber wire group; A special-shaped reinforcement is also arranged in the sheath layer; The special-shaped reinforcement is composed of two parts: a head part and a tail part; The cross section of the head is arc-shaped, wrapped outside the conductive wire group, and opened toward the end of the optical fiber wire group; The tail is composed of two sections of elliptical arc structures, which are respectively connected to both ends of the opening of the head, and are symmetrically arranged on the upper and lower ends of the optical fiber group with the long axis of the cross-section of the optical fiber group as the symmetry line. 2. A kind of optoelectronic hybrid cable according to claim 1, is characterized in that, The conductive wire group is composed of a first bundle of tubes covered with a plurality of conductive wires, and the cross-section of the first bundle of tubes is circular; The optical fiber line group is composed of a second bundle tube covering a plurality of optical fiber wires, and the cross section of the second bundle tube is elliptical. 3. A kind of optoelectronic hybrid cable according to claim 1, is characterized in that, The set of conductive wires and the set of optical fibers are not in contact with each other and are not tangent to the outer edge of the jacket layer. 4. A kind of optoelectronic hybrid cable according to claim 1, is characterized in that, The elliptical arc of the tail portion is arched outwards away from the optical fiber line group. 5. A kind of optoelectronic hybrid cable according to claim 1, is characterized in that, An isolation layer is arranged outside the sheath layer, and the isolation layer is made of waterproof rubber. 6. A kind of optoelectronic hybrid cable according to claim 5, is characterized in that, A flame retardant layer is arranged outside the isolation layer, and the flame retardant layer is made of silicone rubber. 7. A kind of optoelectronic hybrid cable according to claim 5 or 6, is characterized in that, The jacket layer is also provided with an arched reinforcing member symmetrically arranged with the long axis of the optical fiber group as the line of symmetry. 8. A kind of optoelectronic hybrid cable according to claim 7, is characterized in that, The connecting line of the midpoint of the arched reinforcement passes through the center of the optoelectronic hybrid cable, and is perpendicular to the extension line of the long axis of the optical fiber group; The arched reinforcement is arched outward, and the outer surface is tangent to the inner surface of the isolation layer.

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