CN213988356U - Environment-friendly PVC (polyvinyl chloride) insulating sheath power cable - Google Patents

Abstract

The utility model provides an environmental protection PVC insulation sheath power cable, including the cable core, the filling layer, the polyethylene film area is around the covering, the inner sheath, the aluminium foil is around the covering, armor and oversheath, the outside profile of inner sheath be square and inside profile for with cable core complex curved surface, four arris departments of inner sheath are provided with the structure chamfer and with the parallel dashpot of structure chamfer, the aluminium foil has set gradually fire-retardant layer of glass fiber and elastic buffer layer around between covering and the oversheath, elastic buffer layer's outside evenly distributed has the back to be curved elasticity sand grip, be provided with thermal-insulated elastic filler and waterproof layer between armor and the elastic buffer layer. The utility model relates to an environmental protection PVC insulation sheath power cable has good tensile strength, structural stability, shock-absorbing capacity, heat-proof quality and waterproof performance, reasonable in design, simple structure, and life is longer, is fit for extensive the popularization.

Description

Environment-friendly PVC (polyvinyl chloride) insulating sheath power cable

Technical Field

The utility model belongs to the technical field of the cable, especially, relate to an environmental protection PVC insulation sheath power cable.

Background

A cable is a single component formed by two or more wires bonded, twisted, or braided together to connect two devices to transmit electrical signals. The sheathed cable refers to a single-core or multi-core cable with a sheath layer.

The existing cable mainly comprises 4 parts, namely a conductor core, an insulating layer, an inner sheath, a flame-retardant layer or a flame-retardant layer and an outer sheath. Most cables are good in flexibility, but lack certain strength, so that the difficulty of laying or erecting is increased; in order to ensure the normal use of the cable, a single flame-retardant layer is usually added on the PVC insulating sheath to improve the flame retardancy of the PVC insulating sheath, but the flame retardancy is general, and after the flame-retardant layer is damaged, the flame retardancy of the whole cable is greatly reduced, so that the single flame-retardant layer cannot meet the requirement of the cable on the flame retardancy.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that foretell cable exists, provide a reasonable in design, simple structure, intensity are moderate, be convenient for erect, the fire resistance is better and the longer environmental protection PVC insulation sheath power cable of life.

In order to achieve the above purpose, the technical solution adopted by the present invention is that, the utility model provides an environment-friendly PVC insulating sheath power cable, which comprises a cable core, wherein the cable core comprises two power cable cores and two control cable cores, the power cable cores and the control cable cores are arranged symmetrically at intervals and a balance pipe is arranged between the power cable cores and the control cable cores, the power cable cores and the control cable cores respectively comprise a conductor, an insulating layer and a shielding layer coated outside the conductor, a first filling layer is arranged between the insulating layer and the conductor, a second filling layer is arranged outside the shielding layer, a polyethylene film tape is sequentially arranged outside the second filling layer, the inner sheath, a third filling layer, a wrapped aluminum foil, an armor layer and an outer sheath, the outer contour of the inner sheath is square and the inner contour is a curved surface matched with the cable core, four arris departments of inner sheath are provided with the structure chamfer, the chamfer limit of structure chamfer is 1/5 of inner sheath side width, the inner sheath is on its side and be close to the position of every structure chamfer and be provided with a pair of dashpot parallel with the structure chamfer, the opening of dashpot is towards the third filling layer, the aluminium foil has set gradually fire-retardant layer of glass fiber and elastic buffer layer around between covering and the oversheath, elastic buffer layer's outside evenly distributed has the back to be curved elasticity sand grip, be provided with thermal-insulated elastic filler between armor and the elastic buffer layer, be provided with the waterproof layer between thermal-insulated elastic filler and the armor.

Preferably, the arc-shaped surface of the elastic convex strip is provided with a plurality of sinking grooves distributed along the length of the elastic convex strip.

Preferably, the heat-insulating elastic filler is rigid polyurethane foam.

Preferably, the waterproof layer includes inside and outside waterproof ventilated membrane of interior adhesive layer, the waterproof ventilated membrane of polymer and the outer adhesive layer that sets gradually, interior adhesive layer and the waterproof ventilated membrane of polymer and outer adhesive layer and the waterproof ventilated membrane of polymer all are connected through the adhesive.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the utility model provides an environmental protection PVC insulation sheath power cable, utilize square inner sheath to improve the intensity of cable, reduced the degree of difficulty of laying and setting up the cable, and the design of inner sheath upper structure chamfer and dashpot improves the stability of inner sheath in the cable, is favorable to prolonging the life of cable; the glass fiber flame-retardant layer is beneficial to improving the flame-retardant performance and tensile strength of the cable, and the elastic buffer layer and the heat-insulating elastic filler are beneficial to improving the buffer performance and heat-insulating performance of the cable; the waterproof layer is beneficial to prolonging the protection period of the heat-insulating elastic filler. The utility model relates to a rationally, simple structure, life is longer, is fit for extensive the popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of an environment-friendly PVC insulated sheath power cable provided by an embodiment;

in the above figures:

1. a cable core; 1a, a power cable core; 1b, controlling a cable core; 1c, a balance tube; 2. a filling layer; 21. a first filling layer; 22. a second filling layer; 23. a third filling layer; 3. the polyethylene film is wrapped with a covering; 4. an inner sheath; 41. chamfering the structure; 42. a buffer tank; 5. an aluminum foil wrapping layer; 6. an outer sheath; 7. a fiberglass flame retardant layer; 8. an elastic buffer layer; 81. elastic convex strips; 82. sinking a groove; 9. heat-insulating elastic filler; 10. a waterproof layer; 11. an armor layer.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

An embodiment, as shown in fig. 1, the utility model provides a pair of environmental protection PVC insulation sheath power cable, including cable core 1, cable core 1 includes two power cable sinle silks 1a and two control cable sinle silks 1b, power cable sinle silk 1a and control cable sinle silk 1b interval symmetric arrangement and be provided with balance pipe 1c in its middle, power cable sinle silk 1a and control cable sinle silk 1b all include the conductor and the cladding insulating layer and the shielding layer in the conductor outside, be provided with first filling layer 21 between insulating layer and the conductor, the outside of shielding layer is provided with second filling layer 22, the outside of second filling layer 22 has set gradually the polyethylene film area around covering 3, inner sheath 4, third filling layer 23, the aluminium foil is around covering 5, armor 11 and oversheath 6. Wherein, first filling layer 21, second filling layer 22 and third filling layer 23 constitute the utility model discloses a filling layer 2, and filling layer 2, cable core 1, polyethylene film area are prior art around covering 3, aluminium foil around covering 5, armor 11 and oversheath 6, and this embodiment is no longer repeated here. The utility model discloses the structure of sheath 4 is improved to the key point to the outside of sheath 4 has increased glass fiber flame retardant coating 7, elastic buffer layer 8 and waterproof layer 10 structure in order including, with the working property that improves the cable.

Specifically, the utility model discloses the outside profile of inner sheath 4 be square and inside profile for with cable core complex curved surface, four arris departments of inner sheath 4 are provided with structure chamfer 41, the chamfer limit of structure chamfer 41 is 1/5 of 4 side width of inner sheath, inner sheath 4 is on its side and be close to every structure chamfer 41's position and be provided with a pair of parallel dashpot 2 with the structure chamfer, the opening of dashpot 42 is towards third filling layer 23, the aluminium foil has set gradually glass fiber flame retardant coating 7 and elastic buffer layer 8 around between covering 5 and the oversheath 6, elastic buffer layer 8's outside evenly distributed has the back to be curved elasticity sand grip 81, be provided with thermal-insulated elastic filler 9 between armor 11 and the elastic buffer layer 8, be provided with waterproof layer 10 between thermal-insulated elastic filler 9 and the armor 11. Inner sheath 4 mainly adopts pyrocondensation material and adopts the pyrocondensation cladding in the polyethylene film area around the covering outside to the part of its structure chamfer 41 is favorable to the exterior structure of inner sheath 4 to wrap up it, in addition can make the inner sheath compress tightly in the inside of cable fully as the buffering clearance with dashpot 42, thereby obtains higher structural stability, and then improves the performance of cable. Furthermore, the utility model utilizes the glass fiber flame-retardant layer 7 to play the role of enhancing fire resistance; by utilizing the elastic buffer layer 8 and the heat insulation buffer filler 9, the buffer property and the heat insulation property of the cable are improved, the inner sheath 4 and the internal electrical structure thereof are protected, and the actual service life of the cable is prolonged. And simultaneously, the utility model discloses a set up waterproof layer 10, be favorable to prolonging thermal-insulated elastic filler 9's guard period, further prolong the life of cable.

In order to improve elastic buffer layer 8's shock-absorbing capacity, the utility model discloses be provided with a plurality of heavy grooves 82 along its length distribution on elastic convex strip 81's arcwall face, utilize heavy groove 82 to provide certain shrink expansion performance and heat dispersion for elastic buffer layer 8's outer peripheral face, in addition the effect of elastic buffer layer 8 material itself makes the utility model discloses an elastic buffer layer 8 has higher shock-absorbing capacity and longer life.

In order to improve the practicability of the heat insulation elastic filler 9, the utility model provides a heat insulation elastic filler 9 is rigid polyurethane foam. The hard polyurethane foam plastic is one kind of organic high polymer foam material, and is foamed plastic with inside open pore or nostril structure with organic synthetic resin as material and added foaming agent.

In order to improve waterproof layer 10's waterproof performance, the utility model provides a waterproof layer 10 includes inside and outside interior adhesive layer, the waterproof ventilated membrane of polymer and the outer adhesive layer that sets gradually, and interior adhesive layer and the waterproof ventilated membrane of polymer and outer adhesive layer are all connected through the adhesive.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (4)

1. An environment-friendly PVC insulating sheath power cable comprises a cable core, wherein the cable core comprises two power cable cores and two control cable cores, the power cable cores and the control cable cores are symmetrically arranged at intervals and are provided with a balance pipe in the middle, the power cable cores and the control cable cores comprise conductors, insulating layers and shielding layers, the insulating layers and the shielding layers are coated outside the conductors, a first filling layer is arranged between the insulating layers and the conductors, a second filling layer is arranged outside the shielding layers, a polyethylene film tape is sequentially arranged outside the second filling layer, the polyethylene film tape is wound on the covering, the inner sheath, a third filling layer, an aluminum foil is wound on the covering, an armor layer and an outer sheath, the environment-friendly PVC insulating sheath power cable is characterized in that the outer contour of the inner sheath is square, the inner contour of the inner sheath is a curved surface matched with the cable core, structural chamfers are arranged at four side edges of the inner sheath, and the chamfered edges of the structural chamfers are 1/5 of the side width of the inner sheath, the inner sheath is provided with a pair of buffer grooves parallel to the structural chamfers on the side faces of the inner sheath and close to the position of each structural chamfer, the opening of each buffer groove faces towards a third filling layer, a glass fiber flame-retardant layer and an elastic buffer layer are sequentially arranged between the aluminum foil wrapping layers and the outer sheaths, elastic convex strips with arc-shaped back faces are uniformly distributed on the outer portions of the elastic buffer layers, heat-insulating elastic fillers are arranged between the armor layers and the elastic buffer layers, and waterproof layers are arranged between the heat-insulating elastic fillers and the armor layers.

2. The environment-friendly PVC power cable with an insulating sheath according to claim 1, wherein a plurality of sinking grooves are formed on the arc-shaped surface of each elastic protruding strip and distributed along the length of the elastic protruding strip.

3. The environment-friendly PVC insulation sheath power cable according to claim 2, wherein the heat-insulating elastic filler is rigid polyurethane foam.

4. The power cable with the environment-friendly PVC insulating sheath according to claim 3, wherein the waterproof layer comprises an inner bonding layer, a polymer waterproof breathable film and an outer bonding layer which are sequentially arranged inside and outside, and the inner bonding layer and the polymer waterproof breathable film and the outer bonding layer and the polymer waterproof breathable film are connected through adhesives.

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