CN213424649U

CN213424649U - Large-section ultralow-temperature motor lead wire

Info

Publication number: CN213424649U
Application number: CN202022565449.6U
Authority: CN
Inventors: 熊常枫; 马辽林; 曾旭
Original assignee: Hunan Valin Wire and Cable Co Ltd
Current assignee: Hunan Valin Wire and Cable Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-06-11
Anticipated expiration: 2030-11-09

Abstract

The utility model provides a big cross-section ultra-low temperature motor lead wire, from interior to exterior include in proper order that the conductor sets up in the insulating layer in the conductor outside, mixed weaving layer and oversheath, the conductor adopts low temperature copper alloy small pitch syntropy hank system, the insulating layer includes that the one-level is around covering, second grade around covering and tertiary around the covering, the one-level is polytetrafluoroethylene raw material area around the covering, the second grade is the polyimide film around the covering, tertiary being polytetrafluoroethylene raw material area around the covering, mixed weaving layer is one kind or two kinds of combination in tinned copper wire weaving layer or the aramid fiber weaving layer, and the copper wire is woven and is had the effect of shielding electromagnetism, and the aramid fiber silk is woven and is had tensile strength, mixes and weaves the assurance cable steady operation under the high pressure condition to make the cable can not be because of the crooked fracture. The outer sheath is extruded outside the mixed braided layer.

Description

Large-section ultralow-temperature motor lead wire

Technical Field

The utility model belongs to the technical field of the cable, concretely relates to big cross-section ultra-low temperature motor lead wire.

Background

With the development of the modern society and the improvement of the modern industrial level, the types of the electric wires and the electric cables are diversified day by day, and the technology is mature gradually, so that the development of special electric cables under extreme conditions becomes possible. In some special operations, the environment is under ultralow temperature conditions, such as vacuum, liquid nitrogen or Liquefied Natural Gas (LNG), and the insulation and sheath of the common electric wire and cable are often hardened, fragile and even cracked under the severe conditions, so that the long-term operation requirement cannot be met.

Under the vigorous popularization and use of clean energy LNG, ultra-low temperature electric wires and cables for connecting equipment such as LNG transportation, transfer and storage are under vigorous development. Therefore, there is a need for autonomous development of a wire cable that can normally supply electric power and transmit signals under ultra-low temperature conditions.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in: in order to realize stable operation of the motor under ultra-low temperature conditions, it is necessary to use a protective material capable of withstanding ultra-low temperatures, and to ensure sufficient bending properties of the electric wire and the ability to prevent cracking under extreme conditions such as low temperatures.

The utility model provides a following technical scheme: the utility model provides a big cross-section ultra-low temperature motor lead wire, from interior to exterior includes in proper order that the conductor sets up in insulating layer, mixed weaving layer and the oversheath in the conductor outside, the conductor adopts low temperature copper alloy minor pitch syntropy hank system, the insulating layer includes that the one-level winds the covering, second grade around covering and tertiary around the covering, the one-level is polytetrafluoroethylene raw material area around the covering, the second grade is the polyimide film around the covering, tertiary being polytetrafluoroethylene raw material area around the covering, mixed weaving layer is one kind or two kinds of combination in tinned copper wire weaving layer or the aramid fiber weaving layer, and the copper wire is woven and is had the effect of shielding electromagnetism, and aramid fiber is woven and is had tensile strength, and mixed weaving guarantees that the cable operates steadily under the high-pressure condition to make the cable can not because of the. The outer sheath is extruded outside the mixed braided layer. The three-layer structure is used for wrapping insulation, so that the stable operation of the cable under a high-voltage condition is guaranteed, the cable is endowed with good bending performance, the outer diameter of the cable is small, and the installation is convenient.

As a further improvement of the above technical solution:

the primary winding layer is two layers of polytetrafluoroethylene raw material belts, the insulation performance of the primary winding layer is not affected by the environment, the low-temperature resistance performance is superior, and meanwhile, the primary winding layer can play an inner shielding role and shield the electromagnetic effect generated from the inside of the conductor. The two layers of polytetrafluoroethylene raw material belts of the primary winding layer are opposite in winding direction, and the winding overlapping rate is at least 30%. The wrapping direction is opposite, compared with the same-direction wrapping two layers. The shielding effect can be improved while the wrapping material is saved. The shielding effect cannot be guaranteed due to the low overlapping rate.

The secondary winding layer is two layers of polyimide films, the long-term working temperature of the polyimide is-200-300 ℃, the insulation performance is excellent, the dielectric loss is low, and the secondary winding layer is a good choice of ultralow-temperature insulation materials. The two layers of polyimide films of the secondary lapping layer are opposite in lapping direction, and the lapping overlapping rate is at least 40%. And the opposite direction of the wrapping is realized, so that the wrapping material can be saved, and the temperature adaptability of the cable can be ensured. The overlapping rate is low, and the temperature adaptation effect of the polyimide film cannot be well reflected.

The three-level winding covering is two layers of polytetrafluoroethylene raw material belts, has an external shielding effect, and prevents external electromagnetic interference from influencing conductor data transmission. The two layers of polytetrafluoroethylene raw material belts of the three-level wrapping layer are opposite in wrapping direction, and the wrapping overlapping rate is at least 30%. The three-level is the same around the covering with the one-level around the covering, presss from both sides the second grade that the polyimide film formed around the package around the covering in the middle of the two, and the three-layer is around the covering sintering and is formed a whole for the conductor is insulating, has guaranteed its shielding effect when insulating, has still guaranteed its temperature adaptability, can use under-150 ℃ low temperature environment. The sintered insulating layer can improve the high-voltage resistance of the cable and meet the bending performance requirement of the cable.

The outer sheath is ethylene-tetrafluoroethylene copolymer. The ethylene-tetrafluoroethylene copolymer has good electrical insulation, chemical resistance and mechanical property, and can ensure that the cable is not cracked and corroded in an ultralow-temperature medium, so that the cable can stably run.

The extruded thickness of the outer sheath is 0.3-0.5 mm. The outer sheath is not too thick, so that the outer sheath is not convenient to bend due to too thick thickness, the flexibility of the outer sheath can be greatly reduced, meanwhile, the thickness is small, the weight of the cable cannot be increased, and the outer sheath is convenient to use.

The utility model has the advantages that:

the utility model discloses a big cross-section ultra-low temperature motor lead wire can be normal use under the ultra-low temperature condition, has overcome the technical problem of the flexible fracture of electric wire under extreme condition. Through selecting for use polytetrafluoroethylene raw material area semi-conductive shielding and polyimide to wrap insulating, realized the resistant ultra-low temperature ability of cable, good bending ability and high pressure steady operation ability simultaneously. Through additionally arranging the tinned copper wires and the aramid fibers to be mixed and woven, the stable operation of the cable under the high-pressure condition is ensured, and the cable is prevented from cracking due to bending under the ultralow-temperature condition. The three-layer structure is used for wrapping insulation, so that the stable operation of the cable under a high-voltage condition is guaranteed, the cable is endowed with good bending performance, the outer diameter of the cable is small, and the installation is convenient.

Drawings

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.

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 is the utility model provides a big cross-section ultra-low temperature motor lead wire section structure sketch map.

Reference numerals: 1. a conductor; 2. a primary lapping layer; 3. a secondary lapping layer; 4. a third-stage wrapping layer; 5. mixing the braided layers; 6. an outer sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1, the big cross-section ultra-low temperature motor lead wire of this embodiment, from the inside to including conductor 1 in the insulating layer in the conductor 1 outside outward in proper order, mixed weaving layer 5 and oversheath 6, conductor 1 adopts low temperature copper alloy minor pitch syntropy hank system, the insulating layer includes that the one-level winds covering 2, the second grade winds covering 3 and tertiary covering 4 around, the one-level is polytetrafluoroethylene raw material area around covering 2, the second grade is polyimide film around covering 3, tertiary covering 4 is polytetrafluoroethylene raw material area around, mixed weaving layer 5 is the combination of this embodiment in tinned copper wire weaving layer or the aramid fiber weaving layer or two kinds, oversheath 6 is crowded package in 5 outsides in mixed weaving layer.

The one-level is around covering 2 and is two-layer polytetrafluoroethylene raw material area, and the one-level is around two-layer polytetrafluoroethylene raw material area of covering 2 around the package opposite direction, is 60% around the package overlap rate.

The secondary winding layer 3 is two layers of polyimide films, the two layers of polyimide films of the secondary winding layer 3 are opposite in winding direction, and the winding overlapping rate is 80%.

The tertiary covering 4 that winds is two-layer polytetrafluoroethylene raw material area, and the tertiary two-layer polytetrafluoroethylene raw material area that winds covering 4 winds the package opposite direction, winds the package overlap rate and is 60%.

The outer sheath 6 is ethylene-tetrafluoroethylene copolymer. The extruded thickness of the outer sheath 6 is 0.5 mm.

Example 2

The one-level is around covering 2 and is three-layer polytetrafluoroethylene raw material area, and the adjacent two-layer of three-layer polytetrafluoroethylene raw material area is around the opposite direction, and it is 50% to wind the overlapping rate.

The second-stage wrapping layer 3 is three layers of polyimide films, the wrapping directions of two adjacent layers of the three layers of polyimide films are opposite, and the wrapping overlapping rate is 60%.

The three-level wrapping layer 4 is a three-layer polytetrafluoroethylene raw material belt, the adjacent two layers of the three-layer polytetrafluoroethylene raw material belt are opposite in wrapping direction, and the wrapping overlapping rate is 50%. The outer sheath 6 is ethylene-tetrafluoroethylene copolymer.

The extruded thickness of the outer sheath 6 is 0.4 mm.

Example 3

The one-level is four-layer polytetrafluoroethylene raw material area around the covering 2, and four adjacent two-layer of polytetrafluoroethylene raw material area are around the opposite direction, and it is 30% to wind the overlapping rate.

The secondary winding layer 3 is four layers of polyimide films, the directions of adjacent two layers of winding layers of the four layers of polyimide films are opposite, and the winding overlapping rate is 40%.

The three-level wrapping layer 4 is a four-layer polytetrafluoroethylene raw material belt, the adjacent two layers of the four-layer polytetrafluoroethylene raw material belt are opposite in wrapping direction, and the wrapping overlapping rate is 30%.

The outer sheath 6 is ethylene-tetrafluoroethylene copolymer. The extruded thickness of the outer sheath 6 is 0.3 mm.

The cable thus produced has adequate bending properties and has the ability to crack under cold extreme conditions.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. The utility model provides a big cross-section ultra-low temperature motor lead wire, its characterized in that includes conductor (1) outward in proper order and sets up in insulating layer, mixed weaving layer (5) and oversheath (6) in the conductor (1) outside, conductor (1) adopts low temperature copper alloy minor pitch syntropy hank system, the insulating layer includes that the one-level winds covering (2), second grade around covering (3) and tertiary around covering (4), the one-level is polytetrafluoroethylene raw material area around covering (2), the second grade is polyimide film around covering (3), the tertiary is polytetrafluoroethylene raw material area around covering (4), mixed weaving layer (5) are the combination of one kind or two kinds in tinned copper wire weaving layer or the aramid fiber silk weaving layer, oversheath (6) are crowded package in mixed weaving layer (5) outside.

2. The large-section ultralow-temperature motor lead wire as claimed in claim 1, wherein the primary winding layer (2) is formed by two layers of polytetrafluoroethylene raw material belts, the two layers of polytetrafluoroethylene raw material belts of the primary winding layer (2) are opposite in winding direction, and the winding overlapping rate is at least 30%.

3. The large-section ultralow-temperature motor lead wire as claimed in claim 1, wherein the secondary winding layer (3) is formed by two layers of polyimide films, the two layers of polyimide films of the secondary winding layer (3) are opposite in winding direction, and the winding overlapping rate is at least 40%.

4. The large-section ultralow-temperature motor lead wire as claimed in claim 1, wherein the three-stage winding layer (4) is formed by two layers of polytetrafluoroethylene raw material belts, the winding directions of the two layers of polytetrafluoroethylene raw material belts of the three-stage winding layer (4) are opposite, and the winding overlapping rate is at least 30%.

5. The large-section ultra-low temperature motor lead wire according to claim 1, wherein the outer sheath (6) is ethylene-tetrafluoroethylene copolymer.

6. The large-section ultralow-temperature motor lead wire according to claim 5, wherein the extrusion thickness of the outer sheath (6) is 0.3-0.5 mm.