CN214850430U - Cold-shrinkage type flame-retardant outdoor cable terminal - Google Patents

Abstract

The utility model provides a cold-shrinkage flame-retardant outdoor cable terminal, which relates to the field of cable communication and comprises a three-phase main cable and three-phase branch cables, wherein the three-phase branch cables form the three-phase main cable through an insulating skin, the end parts of the three-phase branch cables are connected with wiring terminals in a pressing mode, the stripping positions of the three-phase main cables are nested with middle sleeves, cold-shrinkage insulating sleeves are embedded on the surfaces of the three-phase branch cables, the end part of the cold-shrinkage insulating sleeve is nested on the outer surface of the end part of the middle sleeve, the middle sleeve and the cold-shrinkage insulating sleeve both adopt a cold-shrinkage design, the end part circumference array on the surface of the middle sleeve is provided with sealing convex blocks, and the sealing lug and the middle sleeve are integrally formed, a sealing groove is formed in the circumferential array of the end part of the inner wall of the cold-shrink insulating sleeve, and the cold-shrink insulating sleeve and the middle sleeve are fixed through the sealing lug and the sealing groove. Through the design of the sealing convex block and the sealing groove, the sealing performance between the middle sleeve and the cold-shrinkage insulating sleeve is firmer.

Description

Cold-shrinkage type flame-retardant outdoor cable terminal

Technical Field

The utility model relates to a cable communication technical field especially relates to a fire-retardant outdoor cable terminal of shrinkage formula.

Background

At present, two types of cold-shrinkable terminals mainly exist for medium and low voltage cables, and are also the main categories of all cold-shrinkable terminals on the market at present, the first cold-shrinkable structure comprises an insulator body and an internal stress control tube, the whole body is sleeved on a stripped cable, the position is determined, then the internal stress control tube is pulled out, so that the insulator body is shrunk and wrapped on the cable for insulation protection; the second cold-shrinkage structure adopts a geometric stress control cone, is arranged on a stripped cable, and needs to be coated with silicone oil or silicone grease as a filling agent.

When installation, the main insulation of cable need be shelled to the cold shrinkage formula three-phase cable terminal on the market, after the installation is accomplished, in the nested middle sleeve pipe of the department of shelling, again in proper order three-phase cable surface nested cold-shrink insulating cover in inside, the handing-over department of middle sleeve pipe and cold-shrink insulating cover only relies on cold-shrink tube shrink extrusion fixed, and is sealed insecure, takes place the condition of infiltration easily to produce the condition of flashover or creepage, brought great harm.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the fire-retardant outdoor cable terminal of a cold shrinkage formula that proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a fire-retardant outdoor cable termination of shrinkage formula, includes three-phase main cable and three-phase branch cable, three-phase branch cable forms three-phase main cable through insulating skin, the tip crimping of three-phase branch cable has binding post, three-phase main cable is shelled the department of splitting nestedly and has middle sleeve pipe, every the insulating cover of shrinkage has all been inlayed on three-phase branch cable's surface, the tip nestification of insulating cover of shrinkage is in the surface of middle sleeve pipe tip, middle sleeve pipe and insulating cover of shrinkage all adopt the design of shrinkage formula, the tip circumference array on middle sleeve pipe's surface has sealed lug, and sealed lug and middle sleeve pipe integrated into one piece, the seal groove has been seted up to the tip circumference array of insulating cover inner wall of shrinkage, and shrinkage insulating cover and middle sleeve pipe are fixed through sealed lug and seal groove.

Preferably, the middle sleeve comprises a main sleeve and branch sleeves, the main sleeve covers the surface of the three-phase main cable, the branch sleeves cover the surface of the three-phase branch cable, the number of the branch sleeves is three, and the branch sleeves and the main sleeve are integrally formed.

Preferably, the branch sleeve pipe divide into inside and outside two-layer, and the tip circumference array on its inner layer surface has sealed lug, and the seal groove has been seted up to the tip circumference array of its outer inner wall, the tip circumference array of cold-shrink insulating cover surface has sealed lug, the seal groove has been seted up to the tip circumference array of cold-shrink insulating cover inner wall, the tip of cold-shrink insulating cover inlays between branch sleeve pipe's inlayer and skin, and the cold-shrink insulating cover is sealed fixed through sealed lug and seal groove and branch sleeve pipe. In another mode, the branch sleeve is arranged into two layers, when the cold-shrink insulating sleeve is installed, the end part of the cold-shrink insulating sleeve is embedded between the inner layer and the outer layer of the branch sleeve after the middle sleeve is installed, the corresponding sealing groove and the sealing convex block are aligned, the spiral supporting strip inside the cold-shrink insulating sleeve is drawn out, and therefore the cold-shrink insulating sleeve and the middle sleeve can be sealed and fixed more firmly.

Preferably, the one end that middle sleeve pipe was kept away from to the insulating cover of shrinkage is equipped with protruding muscle, and protruding muscle sets up along the tip circumference of insulating cover of shrinkage, and the inner wall and the binding post surface of protruding muscle paste mutually. The design of protruding muscle for the inner wall of protruding muscle can be hugged closely with binding post's surface, at the tip that takes place the infiltration most easily, carries out the design of protruding muscle, and when the insulating cover shrink of shrinkage, the tip can be tighter with binding post laminating, prevents to ooze from the port department.

Preferably, the surface array of the cold-shrink insulating sleeve is provided with an umbrella skirt, the upper surface of the umbrella skirt is an arc-shaped surface, and the umbrella skirt and the cold-shrink insulating sleeve are integrally formed. Due to the design of the arc-shaped surface of the upper surface of the umbrella skirt, dust and rainwater are not easy to gather on the surface of the umbrella skirt, and flashover is prevented.

Preferably, the surface of the umbrella skirt is sequentially sprayed with a light shielding layer and an anti-oxygen layer from outside to inside, the light shielding layer is formed by spraying a light shielding agent, and the anti-oxygen layer is formed by spraying an antioxidant. The umbrella skirt is used outdoors under severe conditions for a long time, the rubber is easy to age and deform, dust and rainwater are easy to accumulate on the smooth upper surface, and flashover is easy to occur, so that the light shielding agent and the antioxidant are sprayed on the surface of the umbrella skirt, the umbrella skirt is isolated from being contacted with strong ultraviolet light and oxygen, and the service life of the umbrella skirt is prolonged.

Preferably, the umbrella skirt is internally embedded with a PVC net layer, and the PVC net layer is woven by PVC fibers to form a net. The design that PVC fibers are woven into a net is embedded in the umbrella skirt, so that the strength of the umbrella skirt is improved, the umbrella skirt is prevented from deforming, and the flashover probability is reduced.

Advantageous effects

1. In the utility model, when the cable terminal is installed, the insulating layer on the surface of the three-phase main cable and the insulating layer on the surface of the three-phase branch cable are sequentially stripped, the middle sleeve is nested at the stripping position of the three-phase main cable, so that the main sleeve is coated on the surface of the three-phase main cable, the branch sleeve is coated on the surface of the three-phase branch cable, the spiral supporting bar inside the middle sleeve is taken out, the installation of the middle sleeve is completed, and then the crimping and fixing of the connecting terminal are carried out at the end part of the three-phase branch cable; and sequentially nesting cold-shrink insulating sleeves on the surfaces of the three-phase branch cables, aligning the sealing grooves in the inner walls of the cold-shrink insulating sleeves with the sealing lugs on the surfaces of the middle sleeves, taking out the spiral support bars inside the cold-shrink insulating sleeves, and realizing the sealing fixation of the cold-shrink insulating sleeves and the middle sleeves.

2. The utility model discloses in, the branch sleeve pipe also can set up to two-layer, when installing, and the back is accomplished in the middle sleeve pipe installation, inlays the tip of the insulating cover of shrinkage between branch sheathed tube inlayer and the skin to the seal groove and the sealed lug that will correspond align, take out the inside spiral brace bar of the insulating cover of shrinkage, can realize the insulating cover of shrinkage and the more firm sealed fixed of middle sleeve pipe.

3. The utility model discloses in, the surface array of insulating cover of shrinkage is equipped with the full skirt, and the full skirt upper surface is the arcwall face, and full skirt and insulating cover integrated into one piece of shrinkage. Due to the design of the arc-shaped surface of the upper surface of the umbrella skirt, dust and rainwater are not easy to gather on the surface of the umbrella skirt, and flashover is prevented. The umbrella skirt is used outdoors under severe conditions for a long time, the rubber is easy to age and deform, dust and rainwater are easy to accumulate on the smooth upper surface, and flashover is easy to occur. Meanwhile, the design that PVC fibers are woven into a net is embedded in the umbrella skirt, so that the strength of the umbrella skirt is improved, the umbrella skirt is prevented from deforming, and the flashover probability is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a connection mode between a cold-shrink insulating sleeve and an intermediate sleeve according to a first embodiment of the present invention;

FIG. 3 is a schematic view of a second embodiment of the present invention showing a connection between a cold-shrink insulating sleeve and an intermediate sleeve;

fig. 4 is a cross-sectional view of the umbrella skirt of the present invention.

Illustration of the drawings:

1. a three-phase main cable; 2. a three-phase branch cable; 3. a wiring terminal; 4. an intermediate sleeve; 41. a main casing; 42. a branch sleeve; 5. a cold-shrink insulating sleeve; 6. an umbrella skirt; 61. a light shielding layer; 62. an oxygen resistant layer; 63. a PVC mesh layer; 7. a rib is protruded; 8. a sealing groove; 9. and sealing the bump.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

The specific embodiment is as follows:

referring to fig. 1-4, a cold-shrink type flame-retardant outdoor cable terminal comprises a three-phase main cable 1 and three-phase branch cables 2, wherein the three-phase branch cables 2 form the three-phase main cable 1 through insulating skins, the end parts of the three-phase branch cables 2 are connected with wiring terminals 3 in a pressing mode, a stripping part of the three-phase main cable 1 is nested with an intermediate sleeve 4, a cold-shrink insulating sleeve 5 is embedded on the surface of each three-phase branch cable 2, the end part of the cold-shrink insulating sleeve 5 is nested on the outer surface of the end part of the intermediate sleeve 4, the intermediate sleeve 4 and the cold-shrink insulating sleeve 5 are designed in a cold-shrink type mode, sealing convex blocks 9 are arrayed on the circumference of the end part of the surface of the intermediate sleeve 4, and the sealing bump 9 and the middle sleeve 4 are integrally formed, a sealing groove 8 is formed in the circumferential array of the end part of the inner wall of the cold-shrink insulating sleeve 5, and the cold-shrink insulating sleeve 5 and the middle sleeve 4 are fixed through the sealing bump 9 and the sealing groove 8. When the cable terminal is installed, sequentially stripping an insulating layer on the surface of the three-phase main cable 1 and an insulating layer on the surface of the three-phase branch cable 2, nesting the middle sleeve 4 at the stripping position of the three-phase main cable 1 to enable the main sleeve 41 to be coated on the surface of the three-phase main cable 1, enabling the branch sleeve 42 to be coated on the surface of the three-phase branch cable 2, taking out a spiral supporting strip inside the middle sleeve 4 to complete installation of the middle sleeve 4, and then performing compression joint and fixation on the end part of the three-phase branch cable 2 by using the wiring terminal 3; the cold-shrink insulating sleeve 5 is sequentially nested on the surface of each three-phase branch cable 2, the sealing groove 8 in the inner wall of the cold-shrink insulating sleeve 5 is aligned with the sealing lug 9 on the surface of the middle sleeve 4, the spiral supporting bar inside the cold-shrink insulating sleeve 5 is taken out, and the cold-shrink insulating sleeve 5 and the middle sleeve 4 are sealed and fixed.

Specifically, the middle casing 4 includes a main casing 41 and branch casings 42, the main casing 41 covers the surface of the three-phase main cable 1, the branch casings 42 covers the surface of the three-phase branch cable 2, the number of the branch casings 42 is three, and the branch casings 42 and the main casing 41 are integrally formed.

Specifically, the branch sleeve 42 is divided into an inner layer and an outer layer, the end part circumference array on the inner layer surface of the branch sleeve is provided with a sealing bump 9, the end part circumference array on the inner wall of the outer layer is provided with a sealing groove 8, the end part circumference array on the outer surface of the cold-shrink insulating sleeve 5 is provided with a sealing bump 9, the end part circumference array on the inner wall of the cold-shrink insulating sleeve 5 is provided with a sealing groove 8, the end part of the cold-shrink insulating sleeve 5 is embedded between the inner layer and the outer layer of the branch sleeve 42, and the cold-shrink insulating sleeve 5 is sealed and fixed with the branch sleeve 42 through the sealing bump 9 and the sealing groove 8. In another mode, branch sleeve 42 sets up to two-layerly, when installing, after middle sleeve 4 installation is accomplished, inlays the tip of cold-shrink insulating cover 5 between branch sleeve 42's inlayer and outer layer to align corresponding seal groove 8 and sealing bump 9, take out the inside spiral support bar of cold-shrink insulating cover 5, can realize cold-shrink insulating cover 5 and middle sleeve 4 more firm sealed fixed.

Specifically, the one end that middle sleeve 4 was kept away from to insulating cover of shrinkage 5 is equipped with protruding muscle 7, and protruding muscle 7 sets up along insulating cover of shrinkage 5's tip circumference, and the inner wall of protruding muscle 7 pastes with 3 surfaces of binding post mutually. The design of protruding muscle 7 for the inner wall of protruding muscle 7 can be hugged closely with binding post 3's surface, at the tip that takes place the infiltration most easily, carries out the design of protruding muscle 7, and when 5 shrink insulating cover shrinkages, the tip can be tighter with binding post 3 laminating, prevents to ooze from the port department.

Specifically, the surface array of the cold-shrink insulating sleeve 5 is provided with the umbrella skirt 6, the upper surface of the umbrella skirt 6 is an arc-shaped surface, and the umbrella skirt 6 and the cold-shrink insulating sleeve 5 are integrally formed. Due to the design of the arc-shaped surface of the upper surface of the umbrella skirt 6, dust and rainwater are not easy to gather on the surface of the umbrella skirt, and flashover is prevented.

Specifically, the surface of the umbrella skirt 6 is sequentially sprayed with a light shielding layer 61 and an antioxidant layer 62 from outside to inside, the light shielding layer 61 is formed by spraying a light shielding agent, and the antioxidant layer 62 is formed by spraying an antioxidant. The umbrella skirt 6 is used outdoors under severe conditions for a long time, the rubber is easy to age and deform, dust and rainwater are easily accumulated on the flat upper surface, and flashover is easy to occur, so that the light shielding agent and the antioxidant are sprayed on the surface of the umbrella skirt 6, the umbrella skirt 6 is isolated from being contacted with strong ultraviolet light and oxygen, and the service life of the umbrella skirt 6 is prolonged.

Specifically, a PVC net layer 63 is embedded in the umbrella skirt 6, and the PVC net layer 63 is woven by PVC fibers to form a net. The design that PVC fibers are woven into a net is embedded in the umbrella skirt 6, so that the strength of the umbrella skirt 6 is improved, the umbrella skirt is prevented from deforming, and the flashover probability is reduced.

The utility model discloses a theory of operation: in the utility model, when the cable terminal is installed, the insulating layer on the surface of the three-phase main cable 1 and the insulating layer on the surface of the three-phase branch cable 2 are sequentially stripped, the middle sleeve 4 is nested at the stripping position of the three-phase main cable 1, so that the main sleeve 41 is coated on the surface of the three-phase main cable 1, the branch sleeve 42 is coated on the surface of the three-phase branch cable 2, the spiral supporting strip inside the middle sleeve 4 is taken out, the installation of the middle sleeve 4 is completed, and the crimping and fixing of the wiring terminal 3 are carried out at the end part of the three-phase branch cable 2; the cold-shrink insulating sleeve 5 is sequentially nested on the surface of each three-phase branch cable 2, the sealing groove 8 in the inner wall of the cold-shrink insulating sleeve 5 is aligned with the sealing lug 9 on the surface of the middle sleeve 4, the spiral supporting bar inside the cold-shrink insulating sleeve 5 is taken out, and the cold-shrink insulating sleeve 5 and the middle sleeve 4 are sealed and fixed.

In another mode, branch sleeve 42 sets up to two-layerly, when installing, after middle sleeve 4 installation is accomplished, inlays the tip of cold-shrink insulating cover 5 between branch sleeve 42's inlayer and outer layer to align corresponding seal groove 8 and sealing bump 9, take out the inside spiral support bar of cold-shrink insulating cover 5, can realize cold-shrink insulating cover 5 and middle sleeve 4 more firm sealed fixed.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a fire-retardant outdoor cable termination of cold contraction formula, includes three-phase main cable (1) and three-phase branch cable (2), three-phase branch cable (2) form three-phase main cable (1) through insulating skin, the tip crimping of three-phase branch cable (2) has binding post (3), its characterized in that: the nested middle sleeve pipe (4) that has, every of the department of shelling of three-phase main cable (1) the insulating cover of shrinkage has all been inlayed on the surface of three-phase branch cable (2), the end nested in the surface of middle sleeve pipe (4) tip of insulating cover of shrinkage (5), middle sleeve pipe (4) and insulating cover of shrinkage (5) all adopt the design of shrinkage formula, the tip circumference array on the surface of middle sleeve pipe (4) has sealed lug (9), and sealed lug (9) and middle sleeve pipe (4) integrated into one piece, seal groove (8) have been seted up to the tip circumference array of insulating cover of shrinkage (5) inner wall, and insulating cover of shrinkage (5) and middle sleeve pipe (4) are fixed through sealed lug (9) and seal groove (8).

2. A cold-shrink flame-retardant outdoor cable termination according to claim 1, wherein: the middle sleeve (4) comprises a main sleeve (41) and branch sleeves (42), the main sleeve (41) covers the surface of the three-phase main cable (1), the branch sleeves (42) cover the surface of the three-phase branch cable (2), the number of the branch sleeves (42) is three, and the branch sleeves (42) and the main sleeve (41) are integrally formed.

3. A cold-shrink flame-retardant outdoor cable termination according to claim 2, wherein: the branch sleeve pipe (42) divide into inside and outside two-layer, and the tip circumference array on its inner layer surface has sealed lug (9), and seal groove (8) have been seted up to the tip circumference array of its inner wall, the tip circumference array of cold-shrink insulating cover (5) surface has sealed lug (9), seal groove (8) have been seted up to the tip circumference array of cold-shrink insulating cover (5) inner wall, the tip of cold-shrink insulating cover (5) inlays between the inlayer and the skin of branch sleeve pipe (42), and cold-shrink insulating cover (5) are sealed fixed through sealed lug (9) and seal groove (8) and branch sleeve pipe (42).

4. A cold-shrink flame-retardant outdoor cable termination according to claim 1, wherein: one end of the cold-shrink insulating sleeve (5) far away from the middle sleeve (4) is provided with a convex rib (7), the convex rib (7) is circumferentially arranged along the end part of the cold-shrink insulating sleeve (5), and the inner wall of the convex rib (7) is attached to the surface of the wiring terminal (3).

5. A cold-shrink flame-retardant outdoor cable termination according to claim 1, wherein: the surface array of shrinkage insulating boot (5) is equipped with full skirt (6), and full skirt (6) upper surface is the arcwall face, and full skirt (6) and shrinkage insulating boot (5) integrated into one piece.

6. A cold-shrink, flame retardant outdoor cable termination according to claim 5, wherein: the surface of the umbrella skirt (6) is sequentially sprayed with a light shielding layer (61) and an anti-oxygen layer (62) from outside to inside, the light shielding layer (61) is formed by spraying a light shielding agent, and the anti-oxygen layer (62) is formed by spraying an antioxidant.

7. A cold-shrink, flame retardant outdoor cable termination according to claim 5, wherein: the umbrella skirt (6) is embedded with a PVC net layer (63), and the PVC net layer (63) is woven into a net by PVC fibers.

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