Prefabricated optical cable for multiple protection structures of transformer substation

Abstract

The utility model discloses a prefabricated optical cable used for a transformer station multi-protection structure, comprising fiber cores, a plurality of fiber cores each wrapped by an outer sheath, a plurality of fiber cores and outer sheath outer walls sleeved by a water-stop yarn strip, a sleeve sleeved by the water-stop yarn strip, a spiral armor tube sleeved by the sleeve outer wall, an S-shaped opening designed on the spiral armor tube body, and an aramid fiber layer sleeved by the spiral armor tube. The aramid fiber layer is sleeved with a protective sleeve, the S-shaped opening is a through opening penetrating through the two ends of the spiral armor pipe, the spiral armor pipe is made of spring steel, the water stop yarn strip recovers to the original state when absorbing water and expanding and dehydrating, and the technical scheme solves the problems encountered in the background technology.

Description

Technical Field

[0001] The utility model belongs to the technical field of optoelectronic communications, and in particular relates to a prefabricated optical cable for a multiple protection structure of a transformer substation. Background Art

[0002] Optical fiber cable is a communications cable assembly designed to meet optical, mechanical, or environmental performance specifications. It utilizes one or more optical fibers encased in a sheath as the transmission medium and can be used individually or in groups. The optical fibers undergo a specific process to form optical cables. When laying optical fiber cables in substations, it is important to consider the cable's deformation due to stress, such as from animals biting, people trampling, and vehicles and other objects running over it. It is also important to consider factors such as the cable's core's ability to absorb moisture and resist heat and thermal expansion. Existing optical cables meet substation installation requirements to a certain extent, but they lack the ability to provide better protection against deformation, moisture, or excessive thermal expansion. Therefore, they cannot meet standard requirements when laid in special locations such as substations. Utility Model Content

[0003] In view of the technical problems mentioned in the above background technology, a prefabricated optical cable for a multi-protection structure of a substation is designed to solve this problem.

[0004] The utility model is implemented as follows: a prefabricated optical cable for a multiple protection structure of a substation, including a fiber core, a plurality of fiber cores each wrapped with an outer sheath, a plurality of fiber cores and outer sheath outer walls covered with water-stop yarns, the water-stop yarns are covered with a sleeve, the outer wall of the sleeve is covered with a spiral armored tube, the spiral armored tube body is designed with an S-shaped opening, the outer wall of the spiral armored tube is covered with an aramid layer, and the aramid layer is covered with a protective sleeve.

[0005] Preferably, the S-shaped opening is a through opening that passes through both ends of the spiral armor tube, and the spiral armor tube is made of spring steel.

[0006] Preferably, the water-stop yarn strip expands when absorbing water and returns to its original shape when dehydrated.

[0007] Preferably, the water-stop yarn, sleeve, spiral armor tube, aramid layer and protective sleeve are all movably sleeved.

[0008] Preferably, the aramid layer and the water-stop yarn strips are both hair-like and multiple strands are superimposed.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] The utility model is an optical cable composed of a fiber core, an outer sheath, a water-stop yarn, a sleeve, a spiral armor tube, an aramid layer and a protective sleeve. When the fiber core continuously works for a long time in a high-temperature environment and generates thermal expansion, the S-shaped opening designed on the spiral armor tube body prevents the cable from bursting due to thermal expansion. The spiral tube has force-rebound elasticity, which can ensure that the optical cable in the spiral armor tube is not squeezed when encountering external forces such as stepping, crushing, and pulling. It also effectively prevents animals from gnawing and damaging it, thus protecting the safety of the cable. During use, the two ends of the cable are prone to water seepage. The water-stop yarn usually expands after absorbing water at both ends of the cable to prevent water vapor from further penetrating, thus having a good waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 It is a cross-sectional view of the present utility model;

[0013] In the figure: 1 protective sleeve, 2 aramid layer, 3 spiral armor tube, 4 S-shaped opening, 5 casing, 6 outer skin, 7 fiber core, 8 water-stop yarn. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the implementation of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0015] Please refer to Figure 1 and Figure 2 A prefabricated optical cable for a multi-protection structure in a substation includes a fiber core 7, several fiber cores 7, each wrapped in a sheath 6, the outer walls of the fiber cores 7 and the sheath 6 covered with a water-stop yarn 8, the water-stop yarn 8 covered with a sleeve 5, and the outer wall of the sleeve 5 covered with a spiral armor tube 3. The spiral armor tube 3 has an S-shaped opening 4 designed on the body, and an aramid layer 2 is covered on the outer wall of the spiral armor tube 3, which is covered with a protective sleeve 1. The fiber core will heat up under long-term continuous operation and will expand thermally when exposed to high temperature environments. The S-shaped opening 4 is designed in the spiral armor tube 3 to prevent the spiral armor tube 3 from bursting due to thermal expansion of the cable. The installation of the aramid layer 2 can enhance the overall resistance of the cable to mechanical stress, effectively preventing damage to the fiber core caused by pulling the cable during construction. The aramid layer 2 is a plurality of hair-like strands stacked together.

[0016] Furthermore, the S-shaped opening 4 is a through opening that passes through both ends of the spiral armor tube 3. The spiral armor tube 3 is made of spring steel, which has force-rebound elasticity. When encountering external forces such as trampling and crushing, it can ensure that the optical cable in the spiral armor tube 3 is not squeezed, and it can also prevent animals from gnawing and damaging it, thereby protecting the safety of the cable.

[0017] Furthermore, the water-stop gauze 8 expands when absorbing water and returns to its original shape when dehydrated. When the water-stop gauze 8 encounters water, it will first begin to expand from the water-encountered place. After expansion, it will absorb and absorb the sleeve 5 to prevent water vapor from further penetrating. During use, the two ends of the cable are prone to become the source of water seepage. The water-stop gauze 8 usually expands after absorbing water at both ends of the cable to prevent water vapor from further penetrating, and has a good waterproof effect; when the water-stop gauze 8 is dehydrated, it returns to its original state and is sheathed on the outer wall of the fiber core 7 and the outer skin 6. The water-stop gauze 8 is a plurality of hair-like strips overlapping each other.

[0018] Furthermore, the water-stop yarn 8, sleeve 5, spiral armor tube 3, aramid layer 2 and protective cover 1 are all movably sleeved, which makes it convenient for peeling, bifurcating and cutting on site under different circumstances. The aramid layer 2 is composed of multiple hair-like strips overlapping each other.

[0019] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A prefabricated optical cable for a multi-protection structure of a substation, comprising a fiber core (7), characterized in that: Each of the plurality of fiber cores (7) is wrapped with an outer skin (6); the outer walls of the plurality of fiber cores (7) and the outer skin (6) are covered with a water-stop yarn (8); the outer wall of the water-stop yarn (8) is covered with a sleeve (5); the outer wall of the sleeve (5) is covered with a spiral armor tube (3); the body of the spiral armor tube (3) is designed with an S-shaped opening (4); the outer wall of the spiral armor tube (3) is covered with an aramid layer (2); and the outer wall of the aramid layer (2) is covered with a protective sleeve (1).

2. The prefabricated optical cable for a multi-protection structure of a substation according to claim 1, characterized in that: The S-shaped opening (4) is a through opening that passes through both ends of the spiral armor tube (3), and the spiral armor tube (3) is made of spring steel.

3. The prefabricated optical cable for a multi-protection structure of a substation according to claim 1, characterized in that: The water-stop yarn strip (8) expands when absorbing water and returns to its original shape when dehydrating.

4. The prefabricated optical cable for a multi-protection structure of a substation according to claim 1, characterized in that: The water-stop yarn (8), sleeve (5), spiral armor tube (3), aramid layer (2) and protective sleeve (1) are all movably sleeved.

5. The prefabricated optical cable for a multi-protection structure of a substation according to claim 1, characterized in that: The aramid layer (2) and the water-stopping yarn strips (8) are both hair-like and multiple strands are superimposed.

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