High-strength anti-cracking outdoor overhead communication cable

Abstract

The invention relates to the technical field of cables, and provides a high-strength anti-cracking outdoor overhead communication cable which comprises a plurality of conductors and a plurality of insulating layers, the conductors and the insulating layers are in one-to-one correspondence, the insulating layers wrap the conductors, and the high-strength anti-cracking outdoor overhead communication cable further comprises a cable core wrapping tape, a metal sheath, an outer sheath, an expansion adaptation assembly and an external protection mechanism. The cable core wrapping tape is wound outside the insulating layer, the metal sheath is located outside the cable core wrapping tape, the space between the metal sheath and the cable core wrapping tape is filled with elastic filler, and the expansion and contraction adaptation assembly is arranged between the metal sheath and the outer sheath and used for adapting to expansion and contraction of the outer sheath and the metal sheath and supporting the outer sheath at the same time. The number of the external protection mechanisms is multiple, and the external protection mechanisms are used for protecting the exterior of the outer sheath. According to the technical scheme, the problems that in the prior art, a communication cable is low in strength and prone to cracking in extreme temperature weather are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a high-strength, crack-resistant outdoor overhead communication cable. Background Art

[0002] Communication cables are cables used to transmit telephone, telegram, fax documents, television and radio programs, data and other electrical signals. They are composed of one or more pairs of mutually insulated conductors twisted together. Compared with overhead lines, communication cables have the advantages of large communication capacity, high transmission stability, good confidentiality, and less influence by natural conditions and external interference.

[0003] Communication cables are mostly installed outdoors at high altitudes. Their strength depends on the strength of the cable insulation layer and sheath. In extreme weather such as high and low temperatures, as well as the heat generated by the cable itself, the cable insulation layer and surface sheath expand and contract. Over time, the outer sheath of the cable is more likely to crack during the expansion and contraction process, affecting the normal use of the communication cable. Therefore, we propose a high-strength, crack-resistant outdoor overhead communication cable that can reduce the cracking of the communication cable. Summary of the invention

[0004] The present invention provides a high-strength, crack-resistant outdoor overhead communication cable, which solves the problem in the prior art that the communication cable has low strength and is prone to cracking in extreme temperature weather.

[0005] The technical solution of the present invention is as follows: A high-strength, crack-resistant outdoor overhead communication cable comprises a conductor and an insulating layer, wherein a plurality of the conductors and the insulating layer are provided, the conductors and the insulating layers correspond to each other one by one, the insulating layer is wrapped around the outside of the conductor, and further comprises: A cable core wrapping tape, wherein the cable core wrapping tape is wound around the outside of the insulating layer; A metal sheath, wherein the metal sheath is located outside the cable core tape, and an elastic filler is filled between the metal sheath and the cable core tape; An outer sheath, the outer sheath being arranged outside the metal sheath; An expansion and contraction adaptation component, wherein a plurality of expansion and contraction adaptation components are provided, wherein the expansion and contraction adaptation component is provided between the metal sheath and the outer sheath, and the expansion and contraction adaptation component is used to adapt to the expansion and contraction of the outer sheath and the metal sheath, and at the same time supports the outer sheath, and the expansion and contraction adaptation component comprises: A fixing seat, the fixing seat being fixedly connected to the outside of the metal sheath; A sliding plate, wherein the fixing seat is provided with a sliding groove, and the sliding plate is slidably installed inside the sliding groove; A support spring, wherein the sliding plate is connected to the inner wall of the sliding groove through the support spring; A support plate, wherein the support plate is fixedly connected to the sliding plate, the support plate is in contact with the inner wall of the outer sheath, and there is a gap between the two support plates in two adjacent expansion and contraction adaptation components; An external protection mechanism, wherein the external protection mechanism is provided with multiple groups, and the external protection mechanism is used to protect the outside of the outer sheath, and the external protection mechanism comprises: A connecting ring, wherein two connecting rings are provided and the two connecting rings are detachably connected via connecting bolts; A clamping ring, wherein four clamping rings are provided, and the clamping rings are connected to the inside of the connecting ring via a clamping spring, and the clamping rings are in contact with the outside of the outer sheath.

[0006] In order to improve the protection effect on the outside of the outer sheath, a protection rod is connected between two adjacent compression rings, and the protection rod is a retractable structure.

[0007] In order to reduce the influence of external temperature on the deformation of the communication cable, lubricating oil is filled between the metal sheath and the outer sheath, and a plurality of elastic barrier rings are fixedly connected between the metal sheath and the outer sheath.

[0008] In order to further improve the protective effect of the outer sleeve, the protective rod is a hollow structure, and the interior of the protective rod is filled with water.

[0009] In order to further reduce the cracking of the communication cable, an elastic band is wrapped around the outside of the protective rod, and the interface position of the elastic band is detachably connected by Velcro.

[0010] The working principle and beneficial effects of the present invention are: 1. In the present invention, the sliding cooperation between the sliding plate and the fixing seat and the elasticity of the supporting spring can adapt to the deformation of the outer sheath and the metal sheath within a certain range, thereby preventing the outer sheath from cracking due to excessive deformation at extreme temperatures. The compression ring is pressed against the surface of the outer sheath by the compression spring, and at the same time, a certain inward force is applied to the outer sheath by the protective rod close to the outside of the outer sheath, thereby reducing the cracking of the outer sheath.

[0011] 2. In the present invention, by filling lubricating oil between the metal sheath and the outer sheath, and filling water into the inside of the protective rod, the external temperature is reduced from being transferred inwards. The specific heat capacity of water and lubricating oil is large, and their temperature changes are small when the external environment changes, thereby reducing the deformation of the communication cable under temperature changes. At the same time, the lubricating oil keeps the inside of the communication cable in a moist state, reducing the cracking of the communication cable due to high-temperature drying.

[0012] 3. Therefore, compared with the communication cables in the prior art, the present invention arranges an expansion and contraction adaptation component between the metal sheath and the outer sheath, and adapts to the small-range deformation of the outer sheath and the metal sheath through the sliding cooperation of the sliding plate and the support plate and the elasticity of the support spring, thereby avoiding the expansion and contraction and stress caused by the tight wrapping of the outer sheath and the metal sheath, and protecting the outside of the outer sheath through the clamping ring and the protective rod. At the same time, the clamping ring and the protective rod are close to the outside of the outer sheath to reduce the expansion and cracking of the outer sheath, and the lubricating oil between the outer sheath and the metal sheath and the water inside the protective rod can reduce the influence of the external ambient temperature on the communication cable, thereby reducing the deformation and cracking of the communication cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the planar structure of the present invention from the left side; Figure 3 It is a schematic diagram of the structure of a partial cross-section of the present invention; Figure 4 This is a schematic diagram of the structure of the expansion and contraction adaptation component of the present invention; Figure 5 It is a schematic diagram of the structure of the external protection mechanism, the protection rod and the elastic band of the present invention; Figure 6 For the present invention Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0015] In the figure: 1. Conductor; 2. Insulation layer; 3. Cable core wrapping tape; 4. Metal sheath; 5. Outer sheath; 6. Elastic filler; 7. Elastic barrier ring; 101, fixed seat; 102, sliding plate; 103, supporting spring; 104, supporting plate; 201. Connecting ring; 202. Compression ring; 203. Connecting bolt; 204. Compression spring; 205. Protective rod; 206. Elastic band; 207. Velcro. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figures 1 to 6As shown, this embodiment proposes a high-strength, crack-resistant outdoor overhead communication cable, including a conductor 1 and an insulating layer 2, wherein a plurality of conductors 1 and insulating layers 2 are provided, and the conductors 1 and insulating layers 2 correspond to each other one by one, and the insulating layer 2 is wrapped around the outside of the conductor 1, and further includes a cable core wrap 3, a metal sheath 4, an outer sheath 5, an expansion and contraction adaptation component and an external protection mechanism. Compared with the communication cable in the prior art, the present invention arranges an expansion and contraction adaptation component between the metal sheath 4 and the outer sheath 5, and the expansion and contraction adaptation component is provided ... The elasticity of 103 can adapt to the small-range deformation of the outer sheath 5 and the metal sheath 4, avoid the expansion and contraction and stress caused by the tight wrapping of the outer sheath 5 and the metal sheath 4, and protect the outside of the outer sheath 5 through the clamping ring 202 and the protective rod 205. At the same time, the clamping ring 202 and the protective rod 205 are close to the outside of the outer sheath 5 to reduce the expansion and cracking of the outer sheath 5. The lubricating oil between the outer sheath 5 and the metal sheath 4 and the water inside the protective rod 205 can reduce the influence of the external environmental temperature on the communication cable, thereby reducing the deformation and cracking of the communication cable.

[0018] The cable core tape 3 is wrapped around the outside of the insulating layer 2. The cable core tape 3 makes the cable cylindrical to prevent the cable from being loose. At the same time, it plays a shielding role to prevent the data signal from being affected. The metal sheath 4 is located outside the cable core tape 3. Elastic filler 6 is filled between the metal sheath 4 and the cable core tape 3. The outer sheath 5 is arranged on the outside of the metal sheath 4. The metal sheath 4 and the outer sheath 5 play a protective role on the cable. Through the elasticity of the elastic filler 6 and the cable core tape 3, the metal sheath 4 can adapt to the deformation of the metal sheath 4 to avoid damage to the cable core caused by close contact between the metal sheath 4 and the cable core.

[0019] There are multiple expansion and contraction adaptation components, which are arranged between the metal sheath 4 and the outer sheath 5. The expansion and contraction adaptation components are used to adapt to the expansion and contraction of the outer sheath 5 and the metal sheath 4, and at the same time support the outer sheath 5. The expansion and contraction adaptation components include a fixed seat 101, a sliding plate 102, a support spring 103 and a support plate 104. The fixed seat 101 is fixedly connected to the outside of the metal sheath 4, and a sliding groove is opened on the fixed seat 101. The sliding plate 102 is slidably installed inside the sliding groove. The sliding plate 102 is connected to the inner wall of the sliding groove through the support spring 103. The support plate 104 is fixedly connected to the sliding plate 102, and the support plate 104 and the outer sheath 5 There is a gap between the two support plates 104 in the two adjacent expansion and contraction adaptation components. Through the sliding cooperation between the sliding plate 102 and the fixing seat 101 and the elasticity of the support spring 103, the support plate 104 can stably support the outer sheath 5 while adapting to the deformation of the outer sheath 5 within a certain range. At the same time, there is a certain gap between the support plates 104, which also allows the outer sheath 5 and the metal sheath 4 to produce a certain range of deformation. When the outer sheath 5 is reduced and the support plates 104 are in contact with each other, the outer sheath 5 can be stably supported to prevent the outer sheath 5 from shrinking to a smaller size, thereby preventing the outer sheath 5 from cracking due to excessive reduction.

[0020] There are multiple groups of external protection mechanisms, which are used to protect the outside of the outer sheath 5. The external protection mechanisms include a connecting ring 201 and a clamping ring 202. There are two connecting rings 201, which are detachably connected by a connecting bolt 203. There are four clamping rings 202, which are connected to the inside of the connecting ring 201 by a clamping spring 204. The clamping ring 202 is in contact with the outside of the outer sheath 5. In order to improve the protection effect on the outside of the outer sheath 5, a protective rod 205 is connected between two adjacent clamping rings 202. The protective rod 205 is a retractable structure. In order to further reduce the cracking of the communication cable, an elastic band 206 is wrapped around the outside of the protective rod 205. The interface position of the elastic band 206 is detachably connected by a Velcro 207. The two connecting rings 201 are connected by a connecting bolt 203. The two connecting rings 201 are spliced ​​into a circular ring shape. The compression spring 204 presses the compression ring 202 against the outside of the outer sheath 5, and the compression ring 202 and the protective rod 205 are pressed against the outside of the outer sheath 5 to limit the outer sheath 5 to prevent the outer sheath 5 from expanding to a certain extent, thereby preventing the outer sheath 5 from bursting. At the same time, the connecting ring 201, the compression ring 202 and the protective rod 205 protect the outside of the communication cable, reduce the damage to the communication cable by foreign objects, and increase the strength of the communication cable. The protective rod 205 has a certain elasticity and can adapt to the bending of the communication cable. At the same time, the protective rod 205 is composed of two slidably connected rod bodies. The extension and retraction of the protective rod 205 can adapt to the deformation of the communication cable within a certain range. The elastic band 206 is mounted on the outside of multiple protective rods 205 through Velcro 207, and the protective rod 205 is limited to a certain extent, so that the protective rod 205 is close to the surface of the outer sheath 5 to clamp the outer sheath 5 and reduce the bursting of the outer sheath 5.

[0021] In order to reduce the influence of external temperature on the deformation of communication cables, lubricating oil is filled between the metal sheath 4 and the outer sheath 5. A plurality of elastic barrier rings 7 are fixedly connected between the metal sheath 4 and the outer sheath 5. The metal sheath 4 and the outer sheath 5 are separated into a plurality of relatively isolated spaces by the elastic barrier rings 7. At the same time, the elasticity of the elastic barrier rings 7 can adapt to the deformation of the metal sheath 4 and the outer sheath 5 to avoid leakage of all the lubricating oil when cracks occur at one position. Lubricating oil is less affected by external temperature than metal, thereby reducing the temperature influence on the metal sheath 4 and the internal conductor 1, and reducing the expansion and contraction of the communication cable caused by heating and cooling.

[0022] In order to further improve the protective effect of the outer sheath, the protective rod 205 is a hollow structure, and the interior of the protective rod 205 is filled with water. Water has a large specific heat capacity. The protective rod 205 can provide a certain degree of insulation for the outer sheath 5, reducing the temperature impact of the external ambient temperature on the outer sheath 5.

[0023] The working principle of this high-strength crack-resistant outdoor overhead communication cable is: The connecting ring 201 is connected by the connecting bolt 203, and the position of the nut of the connecting bolt 203 is adjusted to adjust the distance between the two connecting rings 201, that is, the pressure applied by the compression spring 204 to the compression ring 202 is adjusted, and the compression spring 204 presses the compression ring 202 on the surface of the outer sheath 5, and the outer part of the outer sheath 5 is protected by the compression ring 202 and the protection rod 205; The elasticity of the compression spring 204 and the support spring 103 can adapt to the deformation of the outer sheath 5 and the metal sheath 4 caused by the temperature, and at the same time, the outer sheath 5 and the metal sheath 4 are limited to a certain extent to avoid large deformation under temperature changes and reduce cracking; At the same time, the lubricating oil and water can reduce the influence of the external environment temperature on the communication cable itself. The lubricating oil can also maintain the lubricating environment of the outer sheath 5 and reduce the drying and cracking phenomenon of the outer sheath 5.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength, crack-resistant outdoor overhead communication cable, comprising a conductor (1) and an insulating layer (2), wherein a plurality of the conductor (1) and the insulating layer (2) are provided, the conductor (1) and the insulating layer (2) correspond one to one, and the insulating layer (2) is wrapped around the outside of the conductor (1), characterized in that: It also includes a cable core wrapping tape (3), a metal sheath (4), an outer sheath (5), an expansion and contraction adaptation component and an external protection mechanism; The cable core wrapping tape (3) is wound around the outside of the insulating layer (2); The metal sheath (4) is located outside the cable core tape (3), and an elastic filler (6) is filled between the metal sheath (4) and the cable core tape (3); The outer sheath (5) is arranged outside the metal sheath (4); A plurality of expansion and contraction adaptation components are provided, and the expansion and contraction adaptation components are provided between the metal sheath (4) and the outer sheath (5). The expansion and contraction adaptation components are used to adapt to the expansion and contraction of the outer sheath (5) and the metal sheath (4), and at the same time support the outer sheath (5); The external protection mechanism is provided in multiple groups, and the external protection mechanism is used to protect the outside of the outer sheath (5).

2. A high-strength, crack-resistant outdoor overhead communication cable according to claim 1, characterized in that: The expansion and contraction adaptation component comprises: A fixing seat (101), the fixing seat (101) being fixedly connected to the outside of the metal sheath (4); A sliding plate (102), wherein the fixing seat (101) is provided with a sliding groove, and the sliding plate (102) is slidably mounted inside the sliding groove; A support spring (103), wherein the sliding plate (102) is connected to the inner wall of the sliding groove via the support spring (103); A support plate (104), the support plate (104) being fixedly connected to the sliding plate (102), the support plate (104) being in contact with the inner wall of the outer sheath (5), and a gap existing between the two support plates (104) in two adjacent expansion-contraction adaptation assemblies.

3. A high-strength, crack-resistant outdoor overhead communication cable according to claim 2, characterized in that: The external protection mechanism comprises: A connecting ring (201), wherein two connecting rings (201) are provided, and the two connecting rings (201) are detachably connected via a connecting bolt (203); A clamping ring (202), wherein four clamping rings (202) are provided, and the clamping rings (202) are connected to the inside of the connecting ring (201) via a clamping spring (204), and the clamping ring (202) is in contact with the outside of the outer sheath (5).

4. A high-strength, crack-resistant outdoor overhead communication cable according to claim 3, characterized in that: A protection rod (205) is connected between two adjacent clamping rings (202), and the protection rod (205) is a retractable structure.

5. A high-strength, crack-resistant outdoor overhead communication cable according to claim 4, characterized in that: Lubricating oil is filled between the metal sheath (4) and the outer sheath (5), and a plurality of elastic barrier rings (7) are fixedly connected between the metal sheath (4) and the outer sheath (5).

6. A high-strength, crack-resistant outdoor overhead communication cable according to claim 5, characterized in that: The protection rod (205) is a hollow structure, and the interior of the protection rod (205) is filled with water.

7. A high-strength, crack-resistant outdoor overhead communication cable according to claim 6, characterized in that: An elastic band (206) is wound around the outside of the protection rod (205), and the interface position of the elastic band (206) is detachably connected via a Velcro (207).

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