Compression and impact resistant optical cable

Abstract

The application belongs to the field of optical cables, and particularly relates to a compression-resistant and impact-resistant optical cable. From outside to inside, the optical cable is sequentially provided with an outer sheath, an inner sheath, an elastic buffer layer and an axial line; a plurality of optical fiber cavities for passing optical fiber lines are arranged at the axial line; the inner sheath, the elastic buffer layer and the axial line are sequentially and tightly arranged layer by layer; the outer sheath is coated on the outer side of the inner sheath, and the minimum inner diameter of the outer sheath is greater than the maximum outer diameter of the inner sheath; the inner surface of the outer sheath is circumferentially and orderly provided with a tooth structure, and the outer surface of the inner sheath is correspondingly provided with a groove structure corresponding to the tooth structure, the number of the groove structure is equal to that of the tooth structure, and the groove structure is correspondingly arranged on the radial inner side of the tooth structure. The optical cable adopts a special structure, so that the optical cable itself has a certain compression resistance, and has the ability to withstand high frequency and repeated deformation, that is, has good impact resistance, and at the same time, the use of metal reinforcing parts is reduced, so that the optical cable also has the characteristics of light weight.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical cables, and particularly relates to a compression-resistant and impact-resistant optical cable. BACKGROUND

[0002] An optical cable is a communication cable that has developed rapidly in modern times and is widely used in various industries and fields. In some special fields, there are some specific requirements for optical cables. For example, in special scenes such as rescue sites and mine tunnels, the optical cable is easily affected by instantaneous strong impact force such as falling rocks, which may cause problems such as cable breakage and fiber breakage, and ultimately cause communication obstruction.

[0003] Although most of the existing optical cables have good compression resistance, they are only suitable for external forces that act relatively slowly, such as human trampling, object extrusion or wiring bending. Such external forces can be effectively buffered by the existing compression-resistant structure, but the impact force cannot produce good buffering effect.

[0004] Impact force usually has the characteristics of high frequency and repetition, which will be repeatedly applied to the optical cable within a certain cycle time. Therefore, it is very important to strengthen the deformation recovery and fatigue resistance of the optical cable on the basis of its certain compression mechanical properties. SUMMARY

[0005] To solve the problems of limited impact resistance of the existing optical cable, the existing compression-resistant structure cannot produce timely buffering deformation when facing impact force, and the internal optical fiber of the optical cable is easily damaged by force, the present application provides a compression-resistant and impact-resistant optical cable.

[0006] The purpose of the present application is to:

[0007] I. Ensure that the optical cable has good compression resistance;

[0008] II. Significantly improve the impact resistance of the optical cable;

[0009] III. Ensure that the optical cable has the characteristics of light weight.

[0010] To achieve the above purpose, the present application adopts the following technical solutions.

[0011] A compression-resistant and impact-resistant optical cable comprises:

[0012] An outer sheath, an inner sheath, an elastic buffer layer and an axial line are sequentially arranged from the outside to the inside;

[0013] A plurality of optical fiber cavities for passing optical fiber lines are arranged at the axial line;

[0014] The inner sheath, the elastic buffer layer and the axial line are sequentially and tightly encapsulated layer by layer;

[0015] The outer sheath is wrapped outside the inner sheath, and the minimum inner diameter of the outer sheath is greater than the maximum outer diameter of the inner sheath.

[0016] The inner surface of the outer sheath is circumferentially provided with a tooth structure, and the outer surface of the inner sheath is correspondingly provided with a groove structure corresponding to the tooth structure, the number of the groove structure is equal to the number of the tooth structure and is correspondingly arranged on the radially inner side of the tooth structure.

[0017] As a preferred,

[0018] The tooth structure is a plurality of tooth units formed by cooperation.

[0019] The tooth unit is composed of a short tooth and a long tooth.

[0020] The length of the long tooth along the radial direction of the optical cable is greater than that of the short tooth.

[0021] As a preferred,

[0022] The number of tooth structures is an integer multiple of three, and the tooth unit is composed of three tooth structures.

[0023] As a preferred,

[0024] The three tooth structures in the tooth unit are arranged in the circumferential direction in the order of long tooth, short tooth and long tooth.

[0025] As a preferred,

[0026] The short tooth of the inner surface of the outer sheath is also correspondingly provided with an elastic strip.

[0027] As a preferred,

[0028] The elastic strip is in the shape of a concave letter on the radial cross section of the optical cable, and the outer side in the radial direction is a slot-shaped spigot, and the inner side in the radial direction is a spigot head.

[0029] As a preferred,

[0030] The width of the spigot is equal to the width of the short tooth, the short tooth is embedded in the spigot, and the length of the short tooth is less than the depth of the spigot.

[0031] The spigot head is embedded in the corresponding groove structure on the radially inner side of the short tooth, and the width of the spigot head is greater than or equal to the width of the groove structure.

[0032] As a preferred,

[0033] The sum of the depth of the spigot and the thickness of the spigot head of the elastic strip is greater than the length of the long tooth.

[0034] As a preferred,

[0035] The elastic buffer layer is provided with a bowstring.

[0036] The beneficial effects of the present application are:

[0037] The optical cable adopts special structure matching, so that the optical cable has certain compression resistance, high frequency resistance and repeated deformation resistance, that is, good impact resistance, and the use of metal reinforcing members is reduced, so that the optical cable also has the characteristics of light weight. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 Fig. 1 is a structural schematic diagram of the optical cable of the present application;

[0039] Figure 2 Fig. 2 is an axial structural schematic diagram of the optical cable of the present application;

[0040] Figure 3 Fig. 3 is a schematic diagram of a stress condition of the optical cable of the present application;

[0041] Figure 4 Fig. 4 is a schematic diagram of another stress condition of the optical cable of the present application;

[0042] In the figure: 100 outer sheath, 101 tooth unit, 1011 long tooth, 1012 short tooth, 1013 elastic strip, 10131 embedding opening, 10132 embedding head, 200 inner sheath, 201 groove structure, 300 elastic buffer layer, 301 elastic bow line, 400 axial line, 401 optical fiber cavity, 500 optical fiber line. DETAILED DESCRIPTION

[0043] The present application will be further described in detail below in combination with specific embodiments and the accompanying drawings. Those skilled in the art can implement the present application based on these descriptions. In addition, the embodiments of the present application involved in the following description are generally only a part of the embodiments of the present application, not all the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor should belong to the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., and the meaning of "several" is one or more, unless otherwise explicitly specified.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Unless otherwise specified, the raw materials used in the embodiments of the present application are commercially available or available to those skilled in the art. Unless otherwise specified, the methods used in the embodiments of the present application are methods mastered by those skilled in the art.

[0047] Embodiment

[0048] A light cable with good compression resistance and impact resistance as shown in Figure 1 , which specifically comprises:

[0049] An outer sheath 100, an inner sheath 200, an elastic buffer layer 300 and an axial line 400 are sequentially arranged from the outside to the inside;

[0050] A plurality of optical fiber cavities 401 are provided at the axial line 400, and an optical fiber line 500 is arranged in the optical fiber cavity 401;

[0051] The inner sheath 200, the elastic buffer layer 300 and the axial line 400 are sequentially and tightly wrapped to form a solid structure, which can provide good shaping support and reduce the specific gravity of the optical cable without metal reinforcing members, thereby facilitating the transportation and accommodation of the optical cable;

[0052] There is a gap between the outer sheath 100 and the inner sheath 200, that is, the minimum inner diameter of the outer sheath 100 is greater than the maximum outer diameter of the inner sheath 200, specifically:

[0053] The inner surface of the outer sheath 100 is circumferentially provided with a tooth structure, and the number of circumferentially arranged tooth structures is a multiple of three, wherein three tooth structures constitute a tooth unit 101;

[0054] The three tooth structures in the tooth unit 101 are arranged along the circumference and are long teeth 1011, short teeth 1012 and long teeth 1011 in turn, the length of the long teeth 1011 along the radial direction of the optical cable is greater than that of the short teeth 1012, and in the circumferential direction of the optical cable, the width of the long teeth 1011 and the short teeth 1012 is equal, that is, two long teeth 1011 are arranged on both sides of each short tooth 1012 in the circumferential direction of the inner surface of the outer sheath 100;

[0055] And compared with the way of alternating long teeth 1011 and short teeth 1012, that is, compared with the case of two teeth structure constituting a unit,

[0056] The outer surface of the inner sheath 200 is provided with a groove structure 201 corresponding to the tooth structure, and the number of groove structures 201 is equal to the number of tooth structures, and each tooth structure is provided with a groove structure 201 on the radially inner side;

[0057] The width of the groove structure 201 in the circumferential direction of the optical cable is greater than the width of the tooth structure, so as to ensure that the tooth structure of the outer sheath 100 cannot be tightly clamped in the groove structure 201 due to friction or extrusion, etc. and cannot rebound;

[0058] The short teeth 1012 on the inner surface of the outer sheath 100 are also provided with elastic strips 1013;

[0059] The elastic strip 1013 is in the shape of a concave letter in the radial cross section of the optical cable, and the outer side in the radial direction is a slot-shaped insertion port 10131, and the inner side in the radial direction is an insertion head 10132. The width of the insertion port 10131 is equal to the width of the short teeth 1012, the short teeth 1012 are embedded in the insertion port 10131, and the length of the short teeth 1012 is less than the depth of the insertion port 10131, so as to ensure that there is a gap between the end of the short teeth 1012 and the bottom of the insertion port 10131;

[0060] The insertion head 10132 is embedded in the corresponding groove structure 201 on the radially inner side of the short teeth 1012, and the width of the insertion head 10132 is greater than or equal to the width of the groove structure 201, so as to ensure the installation stability of the elastic strip 1013 and the groove structure 201;

[0061] The sum of the depth of the insertion port 10131 and the thickness of the insertion head 10132 of the elastic strip 1013 is greater than the length of the long teeth 1011, that is, the maximum length of the elastic strip 1013 in the radial direction of the optical cable is greater than the length of the long teeth 1011, so as to ensure that the elastic strip 1013 can play the role of elastic support and separate the inner wall of the outer sheath 100 and the outer wall of the inner sheath 200, so that the outer sheath 100 and the inner sheath 200 are separated;

[0062] The optical cable with the above structure has good impact resistance and pressure resistance when subjected to external force, specifically,

[0063] When the optical cable is subjected to external force, the outer sheath 100 is extruded and deformed, driving the tooth structure to deform. If the main deformation is in the long teeth 1011 part, Figure 3The long teeth 1011 shown form a certain preliminary buffer by colliding with the groove structure 201 of the inner sheath 200. During the collision process, due to the effects of impact force, friction, material deformation and rebound, etc., the external force cannot be directly transmitted inward, and compared with the solid structure, it has good buffering effect. Then the internal elastic buffer layer 300 is used to bear and buffer the external extrusion force, so as to reduce the stress on the shaft center line 400 and protect the internal optical fiber line 500. At the same time, the short teeth 1012 direction is also inevitably subjected to extrusion. When the short teeth 1012 direction is subjected to extrusion force, the elastic strip 1013 is first extruded, and multiple forms and levels of buffering are formed by friction and elastic deformation, which has good compression resistance effect. Figure 4 The short shaft is compressed inwardly first to extrude the elastic strip 1013, which forms multiple forms and levels of buffering by friction and elastic deformation, and has good compression resistance effect.

[0064] When subjected to periodic impact, the optical cable has better impact resistance. Due to the separate arrangement of the outer sheath 100 and the inner sheath 200 and the arrangement of the elastic strip 1013, the structure can quickly reset after being subjected to impact and the impact force disappears to cope with the next impact, and is not easy to be subjected to periodic impact as the solid structure, which causes permanent deformation of the structure and causes internal extrusion damage.

[0065] Further,

[0066] The elastic buffer layer 300 is provided with a bowstring 301, which is easy to deform in the axial direction when subjected to extrusion, further disperses the force, forms better elastic buffering effect, and makes the optical cable have better compression resistance and impact resistance;

[0067] In addition, the optical fiber cavity 401 adopts a non-circular cross-sectional structure, so that when the optical fiber line 500 is arranged in the optical fiber cavity 401, a certain excess space can be formed. The excess space should be on the radial outside of the optical fiber line 500. Due to the existence of the excess space, the optical cable is more difficult to act on the optical fiber line 500 when subjected to impact and extrusion;

[0068] Specifically,

[0069] As shown in the embodiment, the optical fiber cavity 401 of the embodiment is in the shape of a bullet on the radial cross section of the optical cable. The optical fiber line 500 is arranged at the head end on the radial inside of the optical fiber cavity 401, and has more excess space on the radial outside. After the external force acts on the shaft center line 400, the excess space can effectively avoid the direct stress on the optical fiber line 500, so that the compression resistance and impact resistance of the optical cable are significantly improved.

Claims

1. A crush and impact resistant optical cable, characterized in that, The application relates to an anti-pressing and anti-impacting optical cable. The anti-pressing and anti-impacting optical cable comprises, from outside to inside, an outer sheath, an inner sheath, an elastic buffer layer and an axis line. The axis line is provided with a plurality of optical fiber cavities for penetrating optical fiber lines. The inner sheath, the elastic buffer layer and the axis line are sequentially and tightly wrapped. The outer sheath is wrapped outside the inner sheath, and the minimum inner diameter of the outer sheath is greater than the maximum outer diameter of the inner sheath. The inner surface of the outer sheath is provided with tooth structures in sequence in the circumferential direction, the outer surface of the inner sheath is provided with groove structures corresponding to the tooth structures, the number of the groove structures is equal to that of the tooth structures, and the groove structures are arranged on the radially inner side of the tooth structures. The tooth structures form a tooth unit. The tooth unit is composed of short teeth and long teeth. The length of the long teeth along the radial direction of the optical cable is greater than that of the short teeth. The short teeth on the inner surface of the outer sheath are further provided with elastic strips.

2. The anti-pressing and anti-impacting optical cable according to claim 1, wherein the number of the tooth structures is an integer multiple of three, and the tooth unit is composed of three tooth structures.

3. The anti-pressing and anti-impacting optical cable according to claim 2, wherein the three tooth structures in the tooth unit are arranged in sequence along the circumferential direction as long teeth, short teeth and long teeth.

4. The anti-pressing and anti-impacting optical cable according to claim 1, wherein the elastic strip is in the shape of a concave letter on the radial cross section of the optical cable, the outer side of the elastic strip in the radial direction is a groove-shaped spigot, and the inner side of the elastic strip in the radial direction is a spigot head.

5. The anti-pressing and anti-impacting optical cable according to claim 4, wherein the width of the spigot is equal to the width of the short teeth, the short teeth are embedded in the spigot, and the length of the short teeth is less than the depth of the spigot; and the spigot head is embedded in the groove structure corresponding to the radially inner side of the short teeth, and the width of the spigot head is greater than or equal to the width of the groove structure.

6. The anti-pressing and anti-impacting optical cable according to claim 4, wherein the sum of the depth of the spigot and the thickness of the spigot head is greater than the length of the long teeth.

7. The anti-pressing and anti-impacting optical cable according to claim 1, wherein the elastic buffer layer is provided with a bowstring line. ​ ​ ​ ​ ​ ​ ​

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