A superconducting cable

Abstract

The application discloses a forced cooling cable, which comprises a core and an insulating layer wrapped outside the core, and the outer part of the insulating layer is further wrapped with a forced cooling mechanism, wherein the forced cooling mechanism comprises a cover body distributed along the cable axis, one end of the cover body is provided with an air outlet, and the other end is connected with an air inlet through an air pipe, the cover body is used for providing an air flow blocking and flowing path space, and forced cooling of the cable is realized by combining a heat conducting member in the forced cooling mechanism. The forced cooling cable redesigns the external forced cooling structure of the cable, can be applied to forced cooling reconstruction of new cables or old cables while ensuring the cooling effect, has a larger market application space, and can realize effective protection and auxiliary flame-retardant protection of the cable through the forced cooling mechanism.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cables, in particular to a forced cooling cable. BACKGROUND

[0002] The forced cooling cable refers to a corresponding forced cooling structure arranged in the cable, such as a common water-cooled or air-cooled cable. For example, a water-cooled cable disclosed in the prior art with the announcement number CN215770661U comprises a cable body, the cable body comprises, from the inside to the outside, a cable core, a water-blocking layer, a water-cooled fireproof layer, a fire-resistant layer, an armored layer and an outer protective layer, the cable core comprises a first water-cooled pipe, a plurality of conductors and an insulation layer wrapped outside the conductors, the cross section of the conductor is in the shape of a sector, the plurality of conductors are arranged around the cable axis to form a central hole, and the first water-cooled pipe is arranged in the central hole and used for cooling the conductors. The water-cooled cable of the application can cool the conductors and has good fire resistance and flame resistance.

[0003] For another example, a water-cooled cable disclosed in the prior art with the announcement number CN209674970U comprises a conductive wire core and a rubber protective layer. The rubber protective layer and the conductive wire core are arranged in an insulating filling layer, and the insulating filling layer is externally provided with a shielding layer. The shielding layer is externally provided with a water-cooled layer. The water-cooled layer is externally provided with an anti-bending structure layer, wherein the anti-bending structure layer has a plurality of anti-bending structure strips arranged along the cable axis. An injection water layer is arranged outside the elastic buffer layer. The injection water layer is connected with the water-cooled layer through water conveying pipelines towards the cable axis. The injection water layer has an injection port and a water outlet. The injection water layer is provided with a partition plate arranged along the cable axis. The partition plate is arranged in the injection water layer below the injection port and the water outlet, and separates the injection water layer. The four water conveying pipelines of the injection water layer are arranged on both sides of the partition plate of the injection water layer. An anti-corrosion layer is arranged outside the injection water layer. The water-cooled cable has the advantages of good cooling effect, high cooling efficiency and high cable strength.

[0004] The above-mentioned prior art has made perfect improvements in improving the cooling efficiency and has high practical value. However, the traditional forced cooling cable is provided with a liquid cooling channel inside or outside the cable, and the liquid cooling mechanism is arranged. The safety of the cable is reduced due to the wear after long-time use and the water vapor intrusion caused by condensation. In addition, the liquid cooling mechanism is generally formed together with the cable for safety consideration, so the use cost is high, and the relatively old high-voltage cable cannot be provided with the forced cooling function through the added mode. SUMMARY

[0005] The present application aims to provide a forced cooling cable to solve the problem that the conventional forced cooling cable is provided with a liquid cooling channel inside or outside the cable, and the liquid cooling mechanism is provided, which is easy to be reduced in safety due to abrasion after long time use and water vapor intrusion caused by condensation, and the liquid cooling mechanism is generally formed together with the cable for safety consideration, so that the use cost is high, and the relatively old high-voltage cable cannot be provided with the forced cooling function by means of addition.

[0006] To achieve the above object, the present application provides the following technical scheme: a forced cooling cable, comprising a core and an insulating layer wrapped outside the core, and a forced cooling mechanism wrapped outside the insulating layer, wherein the forced cooling mechanism comprises a cover body distributed along the cable axis, one end of the cover body is provided with an air outlet, and the other end is connected with an air inlet through an air pipe, the cover body is used to provide air flow blocking and flow path space, and the forced cooling of the cable is provided by combining a heat conducting member in the forced cooling mechanism.

[0007] As a preferred scheme, the heat conducting member comprises a bottom sheet attached to the outer surface of the insulating layer and a heat conducting sheet installed on the surface of the bottom sheet, and the heat conducting sheets are distributed at equal angles with respect to the cable axis.

[0008] As a preferred scheme, a relatively closed air flow channel is formed between two adjacent heat conducting sheets, and the air flow channel is connected with at least one air pipe and the air outlet.

[0009] As a preferred scheme, the heat conducting sheets in the parallel direction of the cable axis are provided in equal intervals, and the bottom sheet for installing the heat conducting sheets is provided in corresponding intervals or integrally, and the heat conducting sheets are connected with a deformation mechanism for guiding the deformation of the heat conducting sheets when the temperature of the cable is too high.

[0010] As a preferred scheme, the deformation mechanism is composed of the heat conducting sheets, and the heat conducting sheets are made of a memory alloy material.

[0011] As a preferred scheme, the cover body is made of a light-transmitting material.

[0012] As a preferred scheme, the deformation mechanism can also be a metal sheet for connecting the heat conducting sheets and the bottom sheet, and the metal sheet actively deforms or passively deforms to pull the heat conducting sheets to deform synchronously.

[0013] As a preferred scheme, the bottom sheet is provided with a heat conducting column at the lower end surface, the heat conducting column is fitted into a slot formed integrally or by drilling in the insulating layer, and the heat conducting column is used to improve the heat conducting effect.

[0014] As a preferred scheme, the bottom end of the heat-conducting column is provided with a through hole, the inner end of the through hole is separated from the sliding sheet by a containing space, the space above the sliding sheet is an open space, and the movement of the sliding sheet is linked to the metal sheet through the connecting body.

[0015] Compared with the prior art, the strong cooling cable of the application has the following advantages: the external strong cooling structure of the cable is redesigned, which can be applied to the strong cooling modification of new cables or old cables while ensuring the cooling effect, has a larger market application space, and can realize effective protection and auxiliary flame-retardant protection of the cable through the strong cooling mechanism.

[0016] 1. The structure design of the bottom sheet of the cover body matched with the heat-conducting sheet can form a relatively closed space around the cable on the outside, which can form a better airflow strong cooling effect with the heat dissipation fin structure formed by the heat-conducting sheet with equal angle distribution when the space is used as an airflow flowing space, and the flexible and detachable design of the structure, such as bonding, etc., can provide a more flexible strong cooling scheme, and is suitable for adding a strong cooling mechanism to the surface of an old cable.

[0017] Further, by designing the heat-conducting sheet in the axial direction as a multi-segment design, the heat-conducting sheet can be passively deformed to achieve the cable protection effect, and on the other hand, by designing the heat-conducting sheet as a temperature-sensitive deforming memory alloy material, the heat-conducting sheet can be deformed by the abnormal temperature change of the cable, thereby achieving a better auxiliary reminding effect.

[0018] 2. The structure design of the heat-conducting column can enhance the connection stability between the strong cooling structure and the cable, make the strong cooling structure extending into the insulation layer have better heat-conducting effect, and realize the flame-retardant protection effect of the cable by the design of the sliding sheet and the through hole structure in the heat-conducting column. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the embodiment one of the application;

[0020] Figure 2 It is a gas pipe distribution structure schematic view of the application;

[0021] Figure 3 It is a heat-conducting sheet distribution structure schematic view of the embodiment one of the application;

[0022] Figure 4 It is a whole structure schematic view of the embodiment two of the application;

[0023] Figure 5The distribution structure diagram of the heat-conducting sheet of the second embodiment of the present application is shown in the figure.

[0024] Figure 6 The structure diagram of the heat-conducting sheet after deformation of the present application is shown in the figure.

[0025] Figure 7 The distribution structure diagram of the heat-conducting sheet of the third embodiment of the present application is shown in the figure.

[0026] Figure 8 The distribution structure diagram of the heat-conducting column of the present application is shown in the figure.

[0027] Figure 9 The internal structure diagram of the heat-conducting column of the present application is shown in the figure.

[0028] Figure 10 The distribution structure diagram of the slot of the present application is shown in the figure.

[0029] In the figure: 1, insulating layer; 2, wire core; 3, cover body; 4, air pipe; 5, heat-conducting sheet; 6, bottom sheet; 7, metal sheet; 8, heat-conducting column; 9, sliding sheet; 10, perforation; 11, connecting body; 12, slot. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] Please refer to Figures 1-10 The present application provides the following technical solutions: EMBODIMENT

[0032] Embodiment one: the scheme disclosed in the present embodiment is to solve the problems existing in the prior art, and the specific mode is as follows Figures 1-3As shown, the cable includes a core 2 and an insulating layer 1 wrapped outside the core 2, and the outside of the insulating layer 1 is further wrapped with a forced cooling mechanism, wherein the forced cooling mechanism includes a cover 3 distributed along the cable axis, wherein one end of the cover 3 is provided with an air outlet, and the other end is connected with an air inlet through an air pipe 4, wherein the cover 3 is used to provide air flow blocking and flow path space, and forced cooling of the cable is provided by combining the heat conduction piece in the forced cooling mechanism, which includes a bottom sheet 6 attached to the outer surface of the insulating layer 1 and a heat conduction sheet 5 installed on the surface of the bottom sheet 6, wherein the heat conduction sheet 5 is distributed at equal angles about the cable axis, and adjacent two heat conduction sheets 5 form a relatively closed air flow channel, and the air flow channel is respectively connected with at least one air pipe 4 and the air outlet. In the conventional means, a fan or air pump device is directly used to cooperate with the air outlet mechanism to act on the surface of the cable, which is limited by the surface area and length of the cable. Therefore, in the present embodiment, a relatively closed air flow space with an output inlet is formed around the outside of the cable, which is formed by the cover 3 and the annular enclosures at both ends of the cover 3, and the output inlet is also provided in the enclosure. The air pipe 4 connected with the air pump or other equipment is used as the input end. The air flow in the cover 3 and the heat conduction sheet 5 which plays the role of heat dissipation fin can achieve the effect of forced cooling and cooling. Since the heat conduction sheet 5 is attached to the surface of the insulating layer 1 through the bottom sheet 6, the cover 3 and the enclosures at both ends can be installed on the surface of the cable by the way of post-installation. Therefore, the scheme can not only be installed together with new cables, but also be post-installed in old cables which have strong cooling needs, effectively reducing energy consumption and being more energy-saving and environmentally friendly.

[0033] In the scheme disclosed in the embodiment, on the one hand, the fin-shaped heat conduction cooling effect is provided, and on the other hand, the protection effect for the cable is provided, as shown in Figures 4-6 As shown, the heat conduction sheets 5 in the parallel direction of the cable axis are set to be disconnected at equal intervals, and the bottom sheet 6 for installing the set of heat conduction sheets 5 is set to be disconnected or integrated, and the heat conduction sheet 5 is connected with a deformation mechanism for deforming the heat conduction sheet 5 when the temperature of the cable is too high. The deformation mechanism is composed of the heat conduction sheet 5, wherein the heat conduction sheet 5 is made of a memory alloy material. The protection effect is mainly the protection of the cable when it is subjected to pressure or impact force. The main means is to design the originally integrated heat conduction sheet 5 in the axial direction as a multi-segment type. When a certain area is subjected to force, the non-rigid cover 3 will deform together with the elastic heat conduction sheet 5 at the corresponding position to produce a better anti-impact and anti-puncture protection effect. On the other hand, as shown below:

[0034] The cover 3 is made of light-transmitting material. Since the heat-conducting sheet 5 is made of memory alloy material, when the heat-conducting sheet 5 is in an abnormally high temperature state, the segmented heat-conducting sheet 5 corresponding to the outer periphery of the cable will actively deform, so that the staff can intuitively determine the abnormal temperature position of the cable. At the same time, since the heat-conducting sheet 5 is in contact with the high-speed airflow at the edge after deformation, vibration effect is generated to emit a specified frequency sound to play an auxiliary reminding effect.

[0035] In this embodiment, two schemes are disclosed. As shown in the figure, the deformation mechanism can also be a metal sheet 7 for connecting the heat-conducting sheet 5 and the bottom sheet 6. The metal sheet 7 is deformed actively or passively to pull the heat-conducting sheet to deform synchronously. The lower end surface of the bottom sheet 6 is also provided with a heat-conducting column 8 which is fitted into a slot 12 formed integrally or by drilling in the insulating layer 1. The heat-conducting column 8 is used to improve the heat-conducting effect. The bottom end of the heat-conducting column 8 is provided with a through hole 10. The inner end of the through hole 10 is separated from the sliding sheet 9 elastically and slidingly installed in the heat-conducting column 8 by a containing space. The space above the sliding sheet 9 is an open space. The movement of the sliding sheet 9 is linked with the metal sheet 7 through a connecting body 11. In one of the schemes, the containing space below the sliding sheet 9 contains a fire-retardant medium such as fire-retardant sand and the like. When the cable is in an abnormally high temperature state and causes the insulating layer 1 to melt or even burn, the tail end of the through hole 10 will not be blocked. At this time, under the rebound movement effect of the sliding sheet 9, the fire-retardant medium in the containing space will be squeezed and come into contact with the melting or burning part in the cable through the through hole 10, thereby playing a good auxiliary fire-retardant effect. At the same time, the movement of the sliding sheet 9 will drive the metal sheet 7 to deform as a whole through the connecting body 11 (rope body or the like). On the one hand, it can play the reminding effect as in the previous scheme. On the other hand, it can wrap the cable to avoid the further spread of open fire to the outside to a certain extent.

[0036] In the second scheme, the metal sheet 7 made of memory alloy material actively deforms under the abnormally high temperature state of the cable and pulls the sliding sheet 9 through the connecting body 11. Thus, the negative pressure effect of the containing space is used to suck the insulating material in a burning or hot melting state into the containing space, thereby playing an effective auxiliary fire-retardant effect. It is needless to say that the above scheme will obviously increase the weight and economic investment of the cable and is not suitable for conventional cables. It can be used in high-voltage cables or extra-high-voltage plant cable according to the needs of downstream manufacturers.

[0037] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A supercooled cable comprising a core (2) and an insulating layer (1) wrapped on the outside thereof, characterized in that: The outer part of the insulation layer (1) is also wrapped with a forced cooling mechanism, wherein the forced cooling mechanism comprises a cover (3) distributed along the cable axis, wherein one end of the cover (3) is provided with an air outlet, and the other end is connected with an air inlet through an air pipe (4), wherein the cover (3) is used to provide air flow blocking and flow path space, and the forced cooling of the cable is provided by combining the heat conduction member in the forced cooling mechanism. The heat conduction member comprises a bottom sheet (6) attached to the outer surface of the insulation layer (1) and a heat conduction sheet (5) installed on the surface of the bottom sheet (6), wherein the heat conduction sheet (5) is distributed at equal angles about the cable axis. The air flow channel formed between the two adjacent heat conduction sheets (5) is relatively closed, and the air flow channel is connected with at least one air pipe (4) and an air outlet, respectively.

2. A supercooled cable according to claim 1, characterized in that: The heat conduction sheets (5) in the parallel direction of the cable axis are arranged at equal intervals, and the bottom sheet (6) for installing the group of heat conduction sheets (5) is correspondingly arranged in a broken or integrated manner, and the cable temperature is too high to guide the deformation of the heat conduction sheet (5).

3. A supercooled cable according to claim 2, characterized in that: The heat conduction sheet (5) is a memory alloy material.

4. A supercooled cable according to claim 3, characterized in that: The cover (3) is a light-transmitting material.

5. A supercooled cable according to claim 4, characterized in that: Meanwhile, the heat conduction sheet (5) is connected with a deformation mechanism, and the deformation mechanism is a metal sheet (7) for connecting the heat conduction sheet (5) and the bottom sheet (6), wherein the metal sheet (7) is deformed actively or passively to pull the heat conduction sheet to deform synchronously.

6. A cryogenic cable according to claim 5, characterized in that: The lower end surface of the bottom sheet (6) is also provided with a heat conduction column (8), and the heat conduction column (8) is fitted in a slot (12) formed integrally or by drilling in the insulation layer (1), and the heat conduction column (8) is used to improve the heat conduction effect.

7. A supercooled cable according to claim 6, characterized in that: The bottom end of the heat conduction column (8) is provided with a through hole (10), and the inner end of the through hole (10) is separated from the accommodation space of the sliding sheet (9) elastically and slidingly installed in the heat conduction column (8), and the space above the sliding sheet (9) is a non-closed space, and the movement of the sliding sheet (9) is linked with the metal sheet (7) through a connecting body (11).

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