High cold-resistant flexible cable

Abstract

The utility model provides a highly cold-resistant flexible cable, which comprises an inner sheath and a cable core arranged in the inner sheath, a reinforcing layer, a shielding layer, an armor layer, an outer insulating layer and an outer sheath are sequentially arranged outside the inner sheath from inside to outside, and a filling layer is arranged between the inner sheath and the cable core; an inner core, a support frame and a heating body are also arranged in the inner sheath; the supporting frame is a plurality of regular polygon pipes which are arranged along the length direction of the inner core and are sleeved outside the inner core, each side edge of the supporting frame is concave inwards to be arc-shaped, the side edges of the supporting frame correspond to the cable cores one by one and are mutually attached together, and the inner wall of each side edge of the supporting frame is in contact with the inner core; the multiple heating bodies are arranged in the supporting frame in a sleeved mode. The cold resistance of the cable is improved, so that the cable is suitable for an extremely low-temperature environment; by arranging the support frame in the middle of the cable, the radial shrinkage resistance of the cable is improved; the operation temperature of the cable is improved through the heating body, attenuation of cable material performance is slowed down, and it is ensured that the cable has a long service life in a low-temperature environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely relates to a high cold resistance flexible cable. BACKGROUND

[0002] With the popularization of new energy vehicles, new energy vehicles are more and more common on roads all over the place, but in the north, especially in high latitude and near high latitude areas, due to extremely low temperature in winter, in the extreme low temperature environment, the cable performance of new energy vehicles will be adversely affected, resulting in a series of problems such as reduced elasticity, poor flexibility, decreased insulation performance, increased conductor resistance, conductor deformation, brittle insulation layer and poor tensile property of the cable, thereby reducing the service life of the cable and affecting the normal use of the cable, ultimately leading to the use of new energy vehicles being limited, although there are currently a variety of cold resistance flexible cables, these cables are mostly from the means of changing cable materials to improve the cold resistance performance of the cable, but in the long-term extreme low temperature environment, the material performance also gradually decays with the increase of time, and the service life is still not ideal. SUMMARY

[0003] To solve the above problems, the purpose of the utility model is to provide a high cold resistance flexible cable which can adapt to extreme low temperature environment, has slow performance decay and long service life.

[0004] The embodiment is implemented by the following technical solutions:

[0005] A high cold resistance flexible cable, comprising an inner sheath and at least three cable cores uniformly arranged in the inner sheath, a reinforcing layer, a shielding layer, an armor layer, an outer insulation layer and an outer sheath are sequentially arranged from the inside to the outside outside the inner sheath, and a filling layer is arranged between the inner sheath and the cable core; an inner core, a support frame and a heating body are further arranged in the inner sheath; the inner core is surrounded in the middle by all the cable cores; the support frame is a plurality of regular polygonal tubes arranged along the length direction of the inner core and sleeved outside the inner core, each side of the support frame is concave in an arc shape, the sides of the support frame correspond one by one to the cable cores and are mutually attached together, and the inner walls of each side of the support frame are in contact with the inner core; the heating body is a plurality of hollow hoses sleeved in the support frame and arranged uniformly around the inner core.

[0006] Further, in one structure of the utility model, the heating body is three heating wires sleeved in the support frame and located around the inner core.

[0007] Further, in another structure of the utility model, the heating body is three hollow hoses sleeved in the support frame and located around the inner core, one end of the three heating bodies is connected with an externally prearranged heat source, the other end of the three heating bodies extends out of the cable from the other end of the cable, and the heat source is a hot air blower for blowing hot air into the heating body.

[0008] Further, the support frame is made of a metal high-thermal-conductivity material, and a limiting conduit is arranged between the two adjacent support frames, the limiting conduit being a hollow hose sleeved outside the inner core and the heating body.

[0009] The cable is made of low-temperature-resistant material, and the cold resistance of the cable is improved, so that the cable is suitable for an extremely low-temperature environment; the support frame arranged in the middle of the cable increases the radial contraction resistance of the cable; the heating body arranged in the support frame improves the overall temperature of the cable, increases the operating temperature of the cable, slows down the performance degradation of the cable material, and ensures a long service life of the cable in a low-temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0010] The structure of the utility model will be further described in detail below in combination with the drawings.

[0011] Figure 1 The structure of the high-cold-resistance flexible cable is shown in the schematic diagram.

[0012] As shown in the figure: 1-cable core, 101-strengthening steel core, 102-copper conductor, 103-inner insulation layer, 2-inner sheath, 3-strengthening layer, 4-shielding layer, 5-armor layer, 6-outer insulation layer, 7-outer sheath, 8-filling layer, 9-inner core, 10-support frame, 11-heating body, 12-Kevlar rope. DETAILED DESCRIPTION

[0013] The embodiments of the utility model will be further described below by specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0014] It should be known that the structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions of the utility model that can be implemented, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be produced by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like in the specification are only for clear description, not for limiting the scope of the utility model that can be implemented, and the change or adjustment of the relative relationship is also considered as the scope of the utility model that can be implemented without substantially changing the technical content.

[0015] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term '' connected '' '' connection '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium. For ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances. It should be explained that the term '' includes '' '' contains '' or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to such process, method, article or equipment. Embodiment 1

[0016] As Figure 1 Indicated, the utility model provides a kind of high cold-resistant flexible cable, including inner sheath 2 and three cable cores 1 evenly arranged in inner sheath 2.

[0017] Each cable core 1 is made of one reinforcing steel core 101, multiple copper conductors 102 twisted together and inner insulation layer 103, copper conductor 102 is surrounded outside reinforcing steel core 101, and inner insulation layer 103 is arranged outside copper conductor 102.

[0018] In inner sheath 2, reinforcing layer 3, shielding layer 4, armored layer 5, outer insulation layer 6 and outer sheath 7 are sequentially arranged from inside to outside, and filling layer 8 is arranged between inner sheath 2 and cable core 1.

[0019] The inner sheath 2 is made of polyurethane rubber;Outer sheath 7 is made of polytetrafluoroethylene;The reinforcing layer 3 is composed of multiple polytetrafluoroethylene ropes;The inner insulation layer 103 and the outer insulation layer 6 are both made of crosslinked polyvinyl chloride;The shielding layer 4 is composed of copper mesh braided layer;The filling layer 8 is composed of polypropylene particles.Each layer of cable is made of low-temperature resistant material, which improves the cold resistance of cable and makes it suitable for extreme low-temperature environment.

[0020] Inner core 9, support frame 10 and heating body 11 are further arranged in inner sheath 2.

[0021] The inner core 9 is a steel core surrounded in the middle by all cable cores 1.

[0022] The support frame 10 is a plurality of equilateral triangle tubes arranged along the length direction of the inner core and sleeved on the outer side of the inner core 9, each side of the support frame 10 is concave and arc-shaped (and cooperates with the outer side of the cable core 1), the sides of the support frame 10 correspond to the cable cores 1 one by one and are attached to each other, and the inner walls of each side of the support frame 10 are in contact with the inner core 9. The support frame 10 is made of metal high-thermal-conductivity material.

[0023] The heating body 11 is three electric heating wires sleeved in the support frame 10 and uniformly arranged at the periphery of the inner core 9, three channels are formed between the inner wall of the support frame 10 and the inner core 9, one heating body 11 is sleeved in each channel, and the outer part of the heating body 11 also contacts the inner wall of the support frame 10, so that heat is quickly transmitted to the support frame 10, and the support frame 10 dispersively transmits heat to the cable core 1 and each part of the cable.

[0024] Limiting pipes are arranged between the two adjacent support frames 10, the limiting pipe is a hollow hose sleeved outside the inner core 9 and the heating body 11, so that the cable has sufficient bending degree, and the limiting pipe also has the effect of fixing the two adjacent support frames 10, so that the two support frames 10 are prevented from being fixed close to each other and affecting the bending degree of the cable.

[0025] In addition, a plurality of Kevlar ropes 12 are uniformly arranged between the inner sheath 2 and the cable core 1, so that the tensile property of the cable is improved.

[0026] In use, the heating body 11 is powered and heated, heat is transmitted to the support frame 10, the support frame 10 receives heat and dispersively transmits heat to the cable core 1 and each layer of the cable, the overall temperature of the cable is improved, the cable runs at a more suitable temperature, the performance attenuation of the cable material at an extremely low temperature is slowed down, and the service life of the cable in a low-temperature environment is ensured to be longer. Meanwhile, the support frame 10 is arranged in a stable triangular structure, and the radial contraction resistance of the cable in a low-temperature environment is improved. Embodiment 2

[0027] The difference between the embodiment and the embodiment 1 lies in that the heating body 11 is three hollow hoses sleeved in the support frame 10 and located at the periphery of the inner core 9, one end of the three heating bodies 11 is connected with an external pre-set heat source, and the other end extends out of the cable from the other end of the cable, and the heat source is a hot air blower used for blowing hot air into the heating body 11.

[0028] The hot air blower blows hot air into the heating body 11, the heating body 11 transmits heat to each part of the cable, the overall temperature of the cable is improved, the cable runs at a more suitable temperature, the performance attenuation of the cable material at an extremely low temperature is slowed down, and the service life of the cable in a low-temperature environment is ensured to be longer.

[0029] Other parts of the utility model not described in detail are conventional technologies known by those skilled in the art.

[0030] It should be noted that the terms “include”, “contain” or any other variant are intended to cover non-exclusive inclusion, so that the process, method, article or equipment containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0031] The protection scope of the utility model is not limited to the technical scheme disclosed by the specific embodiment, and any modification, equivalent replacement, improvement and the like made to the above embodiment according to the technical essence of the utility model all fall into the protection scope of the utility model.

Claims

1. A high cold-resistant flexible cable, comprising an inner sheath and at least three cable cores uniformly arranged in the inner sheath, and from inside to outside, a reinforcing layer, a shielding layer, an armor layer, an outer insulating layer and an outer sheath are arranged outside the inner sheath, and a filling layer is arranged between the inner sheath and the cable cores; characterized in that: The inner core is surrounded by all the cable cores in the middle part; the support frame is a plurality of regular polygon tubes arranged along the length direction of the inner core and sleeved outside the inner core, each side of the support frame is concave and arc-shaped, the sides of the support frame correspond to the cable cores one by one and are attached to each other, and the inner walls of each side of the support frame are in contact with the inner core; the heating body is a plurality of electric heating wires sleeved in the support frame.

2. The highly cold-resistant flexible electrical cable of claim 1, wherein: The inner core is a steel core.

3. The highly cold-resistant flexible electrical cable of claim 1, wherein: The support frame is a regular triangle tube, and the cable cores corresponding to the three mutually adjacent sides of the support frame are also three; the inner walls of the support frame are attached to the inner core, and three passages are formed between the inner walls of the support frame and the inner core, and one electric heating wire is sleeved in each passage.

4. The highly cold-resistant flexible electrical cable of claim 3, wherein: The heating body is three hollow hoses sleeved in the support frame and located outside the inner core, one end of the three heating bodies is connected with an external preset heat source, and the other end extends out of the cable from the other end of the cable; the heat source is a hot air blower for blowing hot air into the heating body.

5. The highly cold-resistant flexible electrical cable of claim 3, wherein: The support frame is made of a metal high-thermal-conductivity material, and a limiting pipe is arranged between two adjacent support frames, the limiting pipe being a hollow hose sleeved outside the inner core and the heating body.

6. The highly cold-resistant flexible cable according to claim 4 or 5, characterized in that: A plurality of Kevlar ropes are evenly arranged between the inner sheath and the cable core.

7. The highly cold-resistant flexible electrical cable of claim 1, wherein: The cable core includes a reinforcing steel core, a plurality of copper conductors, and an inner insulation layer, the copper conductors being surrounded outside the reinforcing steel core, and the inner insulation layer being arranged outside the copper conductors.

8. The highly cold-resistant flexible electrical cable of claim 1, wherein: The inner sheath is made of polyurethane rubber; the outer sheath is made of polytetrafluoroethylene; the reinforcing layer is composed of a plurality of polytetrafluoroethylene ropes; the inner insulation layer and the outer insulation layer are both made of cross-linked polyvinyl chloride; the shielding layer is composed of a copper mesh braid layer; and the filling layer is composed of polypropylene particles.

9. The highly cold-resistant flexible electrical cable of claim 8, wherein: ​

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