CN222672649U - A cross-linked polyethylene cable resistant to heat deformation - Google Patents

Abstract

The utility model discloses a heat-deformation-resistant crosslinked polyethylene cable, which comprises a composite heat-deformation-resistant sheath layer, wherein the composite heat-deformation-resistant sheath layer consists of an external heat-deformation-resistant layer, a reinforcing layer and an inner protective layer, the composite shielding layer is arranged in the composite heat-deformation-resistant sheath layer and consists of an outer shielding layer, a middle buffer layer and an inner shielding layer, a composite heat-deformation-resistant crosslinked polyethylene insulating layer is arranged in the composite shielding layer, the composite heat-deformation-resistant crosslinked polyethylene insulating layer consists of a bending-resistant buffer layer, a heat-deformation-resistant reinforcing layer and an inner insulating layer, and a cable core is arranged in the composite heat-deformation-resistant crosslinked polyethylene insulating layer, so that the problems of air bubbles, cracks and hardness reduction of the cable caused by heat deformation of the cable are solved.

Description

Heat deformation-resistant crosslinked polyethylene cable

Technical Field

The utility model relates to the technical field of cables, in particular to a heat deformation-resistant crosslinked polyethylene cable.

Background

Cables play a significant role as one of the key infrastructure in modern electrified and informative societies. From deep communication networks to household appliances in daily life, cables are generally composed of conductors, insulating layers, shielding layers, sheath layers and the like. The cable is characterized in that the conductor is a core of the cable and is responsible for transmitting current or signals, the insulating layer is wrapped outside the conductor to ensure that the current or signals cannot leak or be interfered by the outside in the transmission process, the shielding layer further enhances the anti-interference capability of the cable, and the sheath layer plays roles of protecting the internal structure of the cable, enhancing the mechanical strength of the cable and preventing the cable from being damaged by the external environment.

For example, chinese issued patent CN214505039U, a crosslinked polyethylene cable, includes a filling core, a conductive core, and an insulating layer wrapped on an outer wall of the conductive core, where the insulating layer includes a shaping layer, a compression-resistant layer, an insulating inner layer, a wear-resistant inner layer, a flame-retardant layer, a reinforced outer layer, and an insulating outer layer, which are sequentially disposed. The friction inside the cable of avoiding that can be better, tensile strength is high, has solved current cable overall structure's stable form not good enough, and easy damage appears along with the growth of live time, influences whole security performance's problem.

Although the stability of the cable can be improved in the prior art, the problem that thermal deformation is easy to occur along with long-time use can affect the hardness of the cable, so that the performance of the cable is reduced, molecules of a cable material can be diffused along with the rise of temperature, so that the cable becomes softer, the hardness of the cable is reduced, bubbles and cracks can occur in the cable under the condition that the temperature of the material is too high or too fast, the hardness of the cable is reduced, the performance of the cable is further affected, and the prior requirement is not met, so that the heat deformation resistant crosslinked polyethylene cable is provided.

Disclosure of utility model

The utility model aims to provide a heat-deformation-resistant crosslinked polyethylene cable, which solves the problems of bubbles and cracks of the cable and reduced hardness caused by heat deformation of the cable in the prior art.

The heat-deformation-resistant crosslinked polyethylene cable comprises a composite heat-deformation-resistant sheath layer, wherein the composite heat-deformation-resistant sheath layer consists of an outer heat-deformation-resistant layer, a reinforcing layer and an inner protective layer, a composite shielding layer is arranged in the composite heat-deformation-resistant sheath layer and consists of an outer shielding layer, a middle buffer layer and an inner shielding layer, a composite heat-deformation-resistant crosslinked polyethylene insulating layer is arranged in the composite shielding layer, the composite heat-deformation-resistant crosslinked polyethylene insulating layer consists of a bending-resistant buffer layer, a heat-deformation-resistant reinforcing layer and an inner insulating layer, and a cable core is arranged in the composite heat-deformation-resistant crosslinked polyethylene insulating layer.

Preferably, the external heat-resistant deformation layer is positioned outside the reinforcing layer, the external heat-resistant deformation layer is attached to the reinforcing layer, the reinforcing layer is positioned outside the inner protective layer, and the reinforcing layer is attached to the inner protective layer.

Preferably, the outer shielding layer is located outside the middle buffer layer, the outer shielding layer is attached to the middle buffer layer, the middle buffer layer is located outside the inner shielding layer, and the middle buffer layer is attached to the inner shielding layer.

Preferably, the anti-bending buffer layer is positioned outside the heat-deformation-resistant reinforcing layer, and is formed by co-extrusion with the heat-deformation-resistant reinforcing layer, and the heat-deformation-resistant reinforcing layer is positioned outside the inner insulating layer, and is formed by extrusion with the inner insulating layer.

Preferably, the cable core comprises a conductor, a coating layer and a filling layer, wherein the coating layer wraps the conductor to form a wire core, and the filling layer fills a gap between the wire core and the composite heat deformation resistant crosslinked polyethylene insulating layer.

Preferably, the conductor is formed by twisting a plurality of copper wires.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, the composite heat-resistant deformation sheath layer is arranged and consists of the inner sheath layer, the reinforcing layer and the outer heat-resistant deformation layer, the composite heat-resistant deformation sheath layer is made of the high-temperature-resistant material, so that stable performance can be kept in a high-temperature environment, the service life of the cable is prolonged, the bending resistance of the cable is remarkably improved due to the introduction of the reinforcing layer, stable electrical performance can be kept in a complex bending environment, and the cable is excellent in tensile resistance, compression resistance and the like due to the design of the multilayer structure, can adapt to various severe service environments, and has excellent insulating performance and protective performance.

2. The composite shielding layer is composed of the inner shielding layer, the middle buffer layer and the outer shielding layer, the multi-layer structure design of the composite shielding layer can provide more comprehensive electromagnetic shielding, the interference of an external electromagnetic field on internal signals of the cable is effectively reduced, the stability and accuracy of signal transmission are improved, the outer shielding layer is made of high-strength materials, the overall mechanical strength of the cable can be improved, good shielding performance can be still maintained under the action of external forces such as bending and stretching, and the pressure on the inner shielding layer can be reduced in the bending process of the cable due to the introduction of the middle buffer layer, the damage risk of the shielding layer is reduced, and therefore the service life of the cable is prolonged.

3. According to the utility model, the composite heat-deformation-resistant crosslinked polyethylene insulating layer is arranged and consists of the inner insulating layer, the heat-deformation-resistant reinforcing layer and the bending-resistant buffer layer, the heat resistance and the heat deformation resistance of the cable under a high-temperature environment are obviously improved by introducing the special modified crosslinked polyethylene material, the stability of the cable under long-time high-temperature operation is ensured, the stress generated in the bending process of the cable is effectively relieved by introducing the bending-resistant buffer layer, the risk of damage of the insulating layer is reduced, and therefore, the bending-resistant performance and the service life of the cable are improved, the cable has better insulating performance due to the design of the multilayer insulating structure, the occurrence probability of electric faults is reduced, and the electric safety of the cable is improved.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a schematic view of a composite heat distortion resistant jacket layer structure of the present utility model;

FIG. 4 is a schematic view of a composite shielding layer structure according to the present utility model;

FIG. 5 is a schematic view of the structure of the composite heat distortion resistant crosslinked polyethylene insulation layer of the present utility model.

In the figure, 1, a composite heat-deformation-resistant sheath layer, 11, an external heat-deformation-resistant layer, 12, a reinforcing layer, 13, an inner protective layer, 2, a composite shielding layer, 21, an outer shielding layer, 22, a middle buffer layer, 23, an inner shielding layer, 3, a composite heat-deformation-resistant crosslinked polyethylene insulating layer, 31, a bending-resistant buffer layer, 32, a heat-deformation-resistant reinforcing layer, 33, an inner insulating layer, 4, a cable core, 5, a conductor, 6, a coating layer, 7 and a filling layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-5, an embodiment of the present utility model provides a heat distortion resistant crosslinked polyethylene cable, which includes a composite heat distortion resistant sheath layer 1, wherein the composite heat distortion resistant sheath layer 1 is composed of an outer heat distortion resistant layer 11, a reinforcing layer 12 and an inner sheath layer 13, a composite shielding layer 2 is disposed in the composite heat distortion resistant sheath layer 1, the composite shielding layer 2 is composed of an outer shielding layer 21, an intermediate buffer layer 22 and an inner shielding layer 23, a composite heat distortion resistant crosslinked polyethylene insulating layer 3 is disposed in the composite shielding layer 2, the composite heat distortion resistant crosslinked polyethylene insulating layer 3 is composed of a bending resistant buffer layer 31, a heat distortion resistant reinforcing layer 32 and an inner insulating layer 33, a cable core 4 is disposed in the composite heat distortion resistant crosslinked polyethylene insulating layer 3, the composite heat distortion resistant sheath layer 1 is made of a high temperature resistant material, and can maintain stable performance under high temperature environment, and prolong service life of the cable, the multilayer structure design of the composite shielding layer 2 can provide more comprehensive electromagnetic shielding, effectively reduce interference of external electromagnetic field to internal signals of the cable, the composite heat distortion resistant crosslinked polyethylene insulating layer 3 is composed of a bending resistant buffer layer 31, the heat distortion resistant crosslinked polyethylene insulating layer 3 is formed by introducing special modified polyethylene, and the heat distortion resistant crosslinked cable can be ensured under high temperature environment and high temperature stability.

Referring to fig. 3, the external heat-resistant deformation layer 11 is located outside the reinforcing layer 12, the external heat-resistant deformation layer 11 is attached to the reinforcing layer 12, the reinforcing layer 12 is located outside the inner protection layer 13, the reinforcing layer 12 is attached to the inner protection layer 13, the external heat-resistant deformation layer 11 is made of crosslinked polyethylene, and a three-dimensional network structure is formed through a crosslinking reaction.

Referring to fig. 4, the outer shielding layer 21 is located outside the middle buffer layer 22, the outer shielding layer 21 is attached to the middle buffer layer 22, the middle buffer layer 22 is located outside the inner shielding layer 23, the middle buffer layer 22 is attached to the inner shielding layer 23, the outer shielding layer 21 is copper tape, has excellent conductivity and mechanical strength, and can effectively resist external electromagnetic interference, the middle buffer layer 22 is a polyester film, is located between the inner shielding layer and the outer shielding layer, is made of a soft and elastic material, not only provides mechanical buffering, reduces the pressure of a cable on the inner shielding layer in a bending process, but also maintains a shielding effect to a certain extent, the inner shielding layer 23 is aluminum foil, has the characteristics of light weight and good conductivity, can provide a good electromagnetic shielding effect, and is attached to the outer part of the cable insulating layer, and has the main effects of primarily isolating electromagnetic interference and effectively blocking the interference of external electromagnetic fields on signals inside the cable.

Referring to fig. 5, the anti-bending buffer layer 31 is located outside the anti-thermal deformation reinforcing layer 32, the anti-bending buffer layer 31 and the anti-thermal deformation reinforcing layer 32 are formed by co-extrusion, the anti-thermal deformation reinforcing layer 32 is located outside the inner insulating layer 33, the anti-thermal deformation reinforcing layer 32 and the inner insulating layer 33 are formed by extrusion, the anti-bending buffer layer 31 is made of silicone rubber, the outermost layer is made of soft anti-bending materials, stress generated when the cable is bent can be effectively relieved, the anti-thermal deformation reinforcing layer 32 is made of modified crosslinked polyethylene, stability and thermal deformation resistance of the cable at high temperature are improved by adding a heat stabilizer and a crosslinking agent, the inner insulating layer 33 is made of crosslinked polyethylene, and a three-dimensional net structure is formed after crosslinking reaction, so that insulation performance and heat resistance are improved, namely, the cable conductor is clung to the cable conductor and serves as primary isolation of the insulating layer.

Referring to fig. 1 and 2, the cable core 4 includes a conductor 5, a coating layer 6 and a filling layer 7, the coating layer 6 wraps the conductor 5 to form a core, and the filling layer 7 fills a gap between the core and the composite heat deformation-resistant crosslinked polyethylene insulating layer 3.

Referring to fig. 2, the conductor 5 is formed by twisting a plurality of copper wires.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The heat deformation resistant crosslinked polyethylene cable comprises a composite heat deformation resistant sheath layer (1), and is characterized in that the composite heat deformation resistant sheath layer (1) consists of an external heat deformation resistant layer (11), a reinforcing layer (12) and an inner protective layer (13), a composite shielding layer (2) is arranged in the composite heat deformation resistant sheath layer (1), the composite shielding layer (2) consists of an outer shielding layer (21), an intermediate buffer layer (22) and an inner shielding layer (23), a composite heat deformation resistant crosslinked polyethylene insulating layer (3) is arranged in the composite shielding layer (2), the composite heat deformation resistant crosslinked polyethylene insulating layer (3) consists of a bending resistant buffer layer (31), a heat deformation resistant reinforcing layer (32) and an inner insulating layer (33), and a cable core (4) is arranged in the composite heat deformation resistant crosslinked polyethylene insulating layer (3).

2. A heat distortion resistant crosslinked polyethylene cable according to claim 1 wherein said outer heat distortion resistant layer (11) is located outside of the reinforcing layer (12) and the outer heat distortion resistant layer (11) is bonded to the reinforcing layer (12), said reinforcing layer (12) is located outside of the inner jacket (13) and the reinforcing layer (12) is bonded to the inner jacket (13).

3. A heat distortion resistant crosslinked polyethylene cable according to claim 1 wherein said outer shield layer (21) is positioned outside of said intermediate buffer layer (22), said outer shield layer (21) is bonded to said intermediate buffer layer (22), said intermediate buffer layer (22) is positioned outside of said inner shield layer (23), and said intermediate buffer layer (22) is bonded to said inner shield layer (23).

4. A crosslinked polyethylene cable according to claim 1, wherein the buckling-resistant buffer layer (31) is located outside the buckling-resistant reinforcing layer (32), and the buckling-resistant buffer layer (31) is co-extruded with the buckling-resistant reinforcing layer (32), the buckling-resistant reinforcing layer (32) is located outside the inner insulating layer (33), and the buckling-resistant reinforcing layer (32) is extruded with the inner insulating layer (33).

5. A heat distortion resistant crosslinked polyethylene cable according to claim 1, wherein the cable core (4) comprises a conductor (5), a coating layer (6) and a filling layer (7), the coating layer (6) is wrapped on the outer part of the conductor (5) to form a wire core, and the filling layer (7) fills a gap between the wire core and the composite heat distortion resistant crosslinked polyethylene insulating layer (3).

6. A heat distortion resistant crosslinked polyethylene cable according to claim 5 wherein said conductor (5) is stranded from a plurality of copper wires.