CN210325292U - Low temperature resistant underground cable - Google Patents

Abstract

The utility model discloses a microthermal resistant underground cable, including corrosion-resistant overcoat and protective sheath, the inside of protective sheath is provided with middle supporter, and is provided with the conductor between middle supporter and the protective sheath, the inside of protective sheath is located middle supporter and the conductor is provided with the filling layer outward, the inboard fixed mounting of corrosion-resistant overcoat has compressive structure, and compressive structure's inboard is provided with and separates the temperature structure, the outside fixed mounting of protective sheath has the flame retardant coating that is used for the fire prevention high temperature resistance, and the flame retardant coating is located the inboard that separates the temperature structure, the protective sheath passes through the flame retardant coating and separates temperature structure fixed connection. A microthermal resistant underground cable, can effectual improvement whole cable's compressive capacity, guarantee that the cable can be in the ground end for a long time, prolonged life, transmission that can effectual isolated temperature guarantees that the cable also can normal use under low temperature environment, has guaranteed the transport effect of electric power.

Description

Low temperature resistant underground cable

Technical Field

The utility model relates to a cable field, in particular to microthermal resistant underground cable.

Background

Typically a rope-like cable made up of several or groups of conductors (at least two in each group) twisted together, with the conductors of each group being insulated from one another and often twisted around a center, the entire outer surface being coated with a highly insulating coating. The cable has the characteristics of internal electrification and external insulation, and the cable can be a power cable, a control cable, a compensation cable, a shielding cable, a high-temperature cable, a computer cable, a signal cable, a coaxial cable, a fire-resistant cable, a marine cable, a mining cable, an aluminum alloy cable and the like. They are composed of single-strand or multi-strand wires and insulating layers and are used for connecting circuits, electric appliances and the like; the cable is generally buried underground and used, but ground pressure is great, and cable compressive capacity is general, and is fragile after long-time use to the cable separates the temperature effect poor, and ground temperature reduces in low temperature weather, and low temperature can influence the electrically conductive effect of conductor in the cable, makes power loss more.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a microthermal resistant underground cable can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a low temperature resistant underground cable, includes corrosion-resistant overcoat and protective sheath, the inside of protective sheath is provided with middle supporter, and is provided with the conductor between middle supporter and the protective sheath, the inside of protective sheath is located middle supporter and conductor and is provided with the filling layer outward, the inboard fixed mounting of corrosion-resistant overcoat has compressive structure, and compressive structure's inboard is provided with and separates the temperature structure, the outside fixed mounting of protective sheath has the flame retardant coating that is used for fire prevention high temperature resistance, and the flame retardant coating is located the inboard that separates the temperature structure, the protective sheath passes through the flame retardant coating and separates temperature structure fixed connection.

Preferably, the intermediate support comprises a metal member and a ductile layer, and the ductile layer is disposed outside the metal member.

Preferably, the conductor comprises a PVC sheath, a waterproof layer, an armored shielding layer, an insulating layer and alloy wires, the waterproof layer is fixedly mounted on the inner side of the PVC sheath, the armored shielding layer is arranged on the inner side of the waterproof layer, the insulating layer is wrapped on the outer surface of the alloy wires, and the outer surface of the insulating layer is connected with the inner surface of the armored shielding layer.

Preferably, the compression-resistant structure comprises a metal supporting layer, a first elastic layer, a second elastic layer and a compression-resistant layer, the first elastic layer is fixedly mounted on the inner side of the metal supporting layer, the second elastic layer is arranged on the outer surface of the metal supporting layer, and the compression-resistant layer is arranged on the outer surface of the second elastic layer.

Preferably, the heat insulation structure comprises a first insulation frame, a second insulation frame, a cavity and a reinforcing support piece, wherein the cavity is formed between the first insulation frame and the second insulation frame, the reinforcing support piece is arranged in the cavity, two ends of the reinforcing support piece are fixedly connected with the first insulation frame and the second insulation frame respectively, and the first insulation frame is fixedly connected with the second insulation frame through the reinforcing support piece.

Compared with the prior art, the utility model discloses following beneficial effect has: this low temperature resistant underground cable through the compressive structure who sets up, can effectual improvement whole cable compressive capacity, guarantees that the cable can be in the ground end for a long time, has prolonged life, adopts the structure that separates the temperature, can effectual isolated temperature's transmission, guarantees that the cable also can normal use under low temperature environment, has guaranteed the transmission effect of electric power.

Drawings

Fig. 1 is a schematic view of the overall structure of a low temperature resistant underground cable of the present invention;

fig. 2 is a cross-sectional view of a low temperature resistant underground cable of the present invention;

fig. 3 is a schematic structural view of the low temperature resistant underground cable intermediate support of the present invention;

fig. 4 is a schematic view of the internal structure of a low temperature resistant underground cable conductor according to the present invention;

fig. 5 is a schematic structural view of a low temperature resistant underground cable compression-resistant structure of the present invention;

fig. 6 is the utility model relates to a structural schematic diagram of low temperature resistant underground cable heat insulation structure.

In the figure: 1. a corrosion-resistant jacket; 2. a protective sleeve; 3. an intermediate support; 301. a metal member; 302. a ductile layer; 4. a conductor; 401. a PVC sheath; 402. a waterproof layer; 403. an armor shielding layer; 404. an insulating layer; 405. alloy wires; 5. a filling layer; 6. a compression resistant structure; 601. a metal support layer; 602. a first elastic layer; 603. a second elastic layer; 604. a pressure resistant layer; 7. a fire barrier layer; 8. a thermal insulation structure; 801. a first insulating frame; 802. a second insulating frame; 803. a cavity; 804. the support member is reinforced.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-6, a low temperature resistant underground cable comprises a corrosion resistant outer sleeve 1 and a protective sleeve 2, wherein an intermediate support body 3 is arranged inside the protective sleeve 2, a conductor 4 is arranged between the intermediate support body 3 and the protective sleeve 2, a filling layer 5 is arranged inside the protective sleeve 2 and outside the intermediate support body 3 and the conductor 4, a compression-resistant structure 6 is fixedly arranged inside the corrosion resistant outer sleeve 1, a heat insulation structure 8 is arranged inside the compression-resistant structure 6, a fireproof layer 7 for preventing fire and resisting high temperature is fixedly arranged outside the protective sleeve 2, the fireproof layer 7 is arranged inside the heat insulation structure 8, and the protective sleeve 2 is fixedly connected with the heat insulation structure 8 through the fireproof layer 7;

the intermediate support body 3 comprises a metal piece 301 and a tough layer 302, wherein the tough layer 302 is arranged outside the metal piece 301; the conductor 4 comprises a PVC sheath 401, a waterproof layer 402, an armored shielding layer 403, an insulating layer 404 and alloy wires 405, wherein the waterproof layer 402 is fixedly installed on the inner side of the PVC sheath 401, the armored shielding layer 403 is arranged on the inner side of the waterproof layer 402, the insulating layer 404 is wrapped on the outer surface of the alloy wires 405, and the outer surface of the insulating layer 404 is connected with the inner surface of the armored shielding layer 403; the compression-resistant structure 6 comprises a metal supporting layer 601, a first elastic layer 602, a second elastic layer 603 and a compression-resistant layer 604, wherein the first elastic layer 602 is fixedly mounted on the inner side of the metal supporting layer 601, the second elastic layer 603 is arranged on the outer surface of the metal supporting layer 601, and the compression-resistant layer 604 is arranged on the outer surface of the second elastic layer 603; the thermal insulation structure 8 includes a first insulation frame 801, a second insulation frame 802, a cavity 803 and a reinforcing support 804, the cavity 803 is formed between the first insulation frame 801 and the second insulation frame 802, the reinforcing support 804 is disposed in the cavity 803, two ends of the reinforcing support 804 are respectively fixedly connected with the first insulation frame 801 and the second insulation frame 802, and the first insulation frame 801 is fixedly connected with the second insulation frame 802 through the reinforcing support 804.

It should be noted that, the utility model relates to a low temperature resistant underground cable, during production, conductor 4 is passed to protective sheath 2, make the surface of conductor 4 contact with intermediate support body 3, under the combined action of metal component 301 and toughness layer 302 in intermediate support body 3, conductor 4 closely contacts with the inner wall of protective sheath 2, then set up filling layer 5 between protective sheath 2 and conductor 4, after conductor 4 wears, wrap up flame retardant coating 7, thermal insulation structure 8, compressive structure 6 and corrosion-resistant overcoat 1 in proper order on the surface of protective sheath 2, subsequently roll up whole cable, during the use, the staff lays the cable under the ground, first elastic layer 602 and second elastic layer 603 of the inside and outside of metal support layer 601 have good elasticity, when the cable is extruded under the ground, the elastic layer cooperates with compressive layer 604 and forms buffer structure, thereby reduce the pressure that bears when burying deeply, the normal use of the cable is ensured, after the cable is buried, the conductor 4 is connected to related components, and then the cable is used for carrying out power transmission, when power transmission is carried out, the alloy wire 405 in the conductor 4 transmits power, the PVC sheath 401 plays a role in protecting the whole conductor 4, the insulating layer 404 insulates current on the alloy wire 405, the mutual conductor 4 is not influenced, the normal use of the cable is ensured, meanwhile, the armored shielding layer 403 eliminates electrostatic influence when the alloy wire 405 works, the waterproof layer 402 can be waterproof, in low-temperature weather, the ground temperature can be reduced along with the waterproof layer, at the moment, the cavity 803 formed between the first isolation frame 801 and the second isolation frame 802 can well isolate temperature transmission, the conductor 4 is ensured not influenced by low temperature, the use of the conductor 4 is further ensured, the reinforcing support 804 provides effective support for the thermal insulation structure 8, when the cable is used for a long time, the ground bottom is wet, the corrosion-resistant outer sleeve 1 can protect the whole cable from being influenced, the cable is prevented from being corroded by damp, the service life is prolonged, and the use cost is reduced.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. A low temperature resistant underground cable, its characterized in that: including corrosion-resistant overcoat (1) and protective sheath (2), supporter (3) in the middle of the inside of protective sheath (2) is provided with, and is provided with conductor (4) between supporter (3) in the middle of and protective sheath (2), the inside of protective sheath (2) is located in the middle of supporter (3) and conductor (4) and is provided with filling layer (5) outward, the inboard fixed mounting of corrosion-resistant overcoat (1) has compressive structures (6), and the inboard of compressive structures (6) is provided with and separates temperature structure (8), the outside fixed mounting of protective sheath (2) has flame retardant coating (7) that are used for fire prevention high temperature resistance, and flame retardant coating (7) are located the inboard that separates temperature structure (8), protective sheath (2) are through flame retardant coating (7) and separate temperature structure (8) fixed connection.

2. A low temperature-resistant underground cable according to claim 1, wherein: the middle support body (3) comprises a metal piece (301) and a toughness layer (302), and the toughness layer (302) is arranged outside the metal piece (301).

3. A low temperature-resistant underground cable according to claim 1, wherein: the conductor (4) comprises a PVC (polyvinyl chloride) sheath (401), a waterproof layer (402), an armored shielding layer (403), an insulating layer (404) and alloy wires (405), the waterproof layer (402) is fixedly mounted on the inner side of the PVC sheath (401), the armored shielding layer (403) is arranged on the inner side of the waterproof layer (402), the insulating layer (404) is wrapped on the outer surface of the alloy wires (405), and the outer surface of the insulating layer (404) is connected with the inner surface of the armored shielding layer (403).

4. A low temperature-resistant underground cable according to claim 1, wherein: the compression-resistant structure (6) comprises a metal supporting layer (601), a first elastic layer (602), a second elastic layer (603) and a compression-resistant layer (604), wherein the first elastic layer (602) is fixedly mounted on the inner side of the metal supporting layer (601), the second elastic layer (603) is arranged on the outer surface of the metal supporting layer (601), and the compression-resistant layer (604) is arranged on the outer surface of the second elastic layer (603).

5. A low temperature-resistant underground cable according to claim 1, wherein: the heat insulation structure (8) comprises a first insulation frame (801), a second insulation frame (802), a cavity (803) and a reinforcing support (804), wherein the cavity (803) is formed between the first insulation frame (801) and the second insulation frame (802), the reinforcing support (804) is arranged in the cavity (803), two ends of the reinforcing support (804) are fixedly connected with the first insulation frame (801) and the second insulation frame (802) respectively, and the first insulation frame (801) is fixedly connected with the second insulation frame (802) through the reinforcing support (804).

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