Forced cooling type cable

Abstract

The invention discloses a forced cooling type cable which comprises a wire core and an insulating layer wrapping the outer side of the wire core, the insulating layer is further wrapped with a forced cooling mechanism, the forced cooling mechanism comprises a cover body distributed along the axis of the cable, one end of the cover body is provided with an air flow output port, and the other end of the cover body is connected with an air flow input port through an air pipe. Wherein the cover body is used for providing an airflow enclosure and a circulation path space, and providing forced cooling of the cable by combining with a heat conduction piece in the forced cooling mechanism. According to the forced cooling type cable, the external forced cooling structure of the cable is redesigned, the cooling effect is guaranteed, meanwhile, the forced cooling type cable can be suitable for forced cooling transformation of a newly-manufactured cable or an old cable, a larger market application space is achieved, and meanwhile effective protection and auxiliary flame-retardant protection of the cable can be achieved through the forced cooling mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly to a forced-cooling cable. Background Art

[0002] A forced-cooling cable refers to a cable in which a corresponding forced cooling and temperature reduction structure is provided, such as common water-cooled or air-cooled cables. For example, a water-cooled cable with the publication number CN215770661U in the prior art includes a cable body, which sequentially includes a cable core, a water-blocking layer, a water-cooled fireproof layer, a fireproof layer, an armor layer, and an outer protective layer from the inside to the outside. The cable core includes a first water-cooling pipe, a plurality of conductors, and an insulating layer wrapped around the conductors. The cross-section of the conductor is fan-shaped, and the plurality of conductors are arranged around the cable axis to form a central hole. The first water-cooling pipe is arranged in the central hole and is used to cool the conductors. The water-cooled cable of this application can cool the conductors and has good fireproof and flame-retardant properties.

[0003] Another example is a water-cooled cable with the publication number CN209674970U in the prior art, which includes: a conducting wire core and a rubber protective layer; the rubber protective layer and the conducting wire core are arranged in an insulating filling layer, and a shielding layer is arranged outside the insulating filling layer; a water-cooling layer is arranged outside the shielding layer; an anti-bending structure layer is arranged outside the water-cooling layer, and the surface of the anti-bending structure layer has a plurality of anti-bending structure strips arranged along the cable axis; a water injection layer, which is arranged outside the elastic buffer layer, and the water injection layer is connected to the water-cooling layer through a water delivery pipe facing the cable axis. The water injection layer has a water injection port and a water outlet; a partition is arranged in the water injection layer along the cable axis, and the partition is arranged in the water injection layer below the water injection port and the water outlet and separates the water injection layer; the four water delivery pipes of the water injection layer are respectively located on both sides of the partition of the water injection layer; an anti-corrosion layer, which is arranged outside the water injection layer; this water-cooled cable has the advantages of good cooling and temperature reduction effect, high cooling and temperature reduction efficiency, and high cable strength.

[0004] The above-mentioned prior arts have all made perfect improvements in improving the cooling efficiency and have high practical value. However, traditional forced-cooling cables will set liquid cooling channels inside or outside the cables. The setting of the liquid cooling mechanism is likely to reduce the safety of the cables due to wear after long-term use and the intrusion of water vapor caused by condensation. At the same time, the liquid cooling mechanism is generally formed together with the cable for safety considerations, so the use cost is relatively high, and relatively old high-voltage cables cannot be equipped with forced-cooling functions by adding additional components. Summary of the Invention

[0005] The purpose of the present invention is to provide a forced-cooling cable, so as to solve the problems in the above-mentioned background technology that the traditional forced-cooling cable will be provided with liquid-cooling channels inside or outside the cable, and the setting of the liquid-cooling mechanism is likely to reduce the safety of the cable due to wear after long-term use and the intrusion of water vapor caused by condensation. At the same time, the setting of the liquid-cooling mechanism is generally formed together with the cable for safety considerations, so the use cost is relatively high, and the relatively old high-voltage cables cannot be equipped with the forced-cooling function by adding them.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A forced-cooling cable includes a core and an insulating layer wrapped around its outer side. The outside of the insulating layer is further wrapped with a forced-cooling mechanism. The forced-cooling mechanism includes a housing distributed along the axis of the cable. One end of the housing is provided with an air flow output port, and the other end is connected to an air flow input port through a trachea. The housing is used to provide an air flow enclosure and a circulation path space, and provide forced cooling of the cable by combining with a heat-conducting member in the forced-cooling mechanism.

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

[0008] As a preferred solution, a relatively airtight air flow channel is formed between adjacent two heat-conducting sheets, and the air flow channel is respectively connected to at least one trachea and the air flow output port.

[0009] As a preferred solution, the heat-conducting sheets in the direction parallel to the axis of the cable are arranged at equal intervals and disconnected, and the bottom sheet for installing this group of heat-conducting sheets is correspondingly disconnected or integrally arranged. At the same time, the heat-conducting sheets are connected to a deformation mechanism and are used to guide the deformation of the heat-conducting sheets when the temperature of the cable is too high.

[0010] As a preferred solution, the deformation mechanism is composed of the heat-conducting sheet itself, and the heat-conducting sheet is made of a shape memory alloy material.

[0011] As a preferred solution, the housing is made of a light-transmitting material.

[0012] As a preferred solution, the deformation mechanism can also be a metal sheet used to connect the heat-conducting sheet and the bottom sheet, and the metal sheet drives the heat-conducting sheet to deform synchronously through active deformation or passive deformation.

[0013] As a preferred solution, heat-conducting columns are further installed on the lower end surface of the bottom sheet. The heat-conducting columns are fitted into slots integrally formed or drilled in the insulating layer, and the heat-conducting columns are used to improve the heat-conducting effect.

[0014] As a preferred solution, a perforation is provided at the bottom end of the heat conduction column. The inner end of the perforation is separated from the accommodating space of the sliding piece elastically and slidably installed inside the heat conduction column. At the same time, the space above the sliding piece is a non-closed space, and the movement of the sliding piece is linked with the metal piece through a connecting body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: For this forced-cooling cable, the external forced-cooling structure of the cable is redesigned. While ensuring the cooling effect, it can be applied to new cables or the forced-cooling transformation of old cables, having a larger market application space. At the same time, it can achieve effective protection and auxiliary flame retardant protection for the cable through the forced-cooling mechanism, as shown in the following content.

[0016] 1. The structural design of the cover body cooperating with the bottom plate of the heat conduction sheet can, on the one hand, use the cover body to form a relatively closed space around the cable. When this space serves as the air flow space, it can cooperate with the heat dissipation fin structure formed by the equally-angled distributed heat conduction sheets to achieve a better air flow forced-cooling effect. On the other hand, the flexible detachable design of the above structure, such as bonding, etc., is used to provide a more flexible forced-cooling solution, and it is also applicable to adding a forced-cooling mechanism to the surface of old cables. As a further improvement, by designing the whole heat conduction sheet in the axial direction as a multi-segment type, while ensuring the heat dissipation and temperature reduction effect, the heat conduction sheet can achieve the cable protection effect of passive deformation through the way of deformation after being stressed. On the other hand, by designing the heat conduction sheet as a temperature-sensitive deformable shape memory alloy material, the abnormal temperature change of the cable can be used to guide the deformation of the heat conduction sheet, thereby generating a better auxiliary reminder effect.

[0017] 2. The structural design of the heat conduction column can enhance the connection stability between the forced-cooling structure and the cable, make the forced-cooling structure extending into the insulation layer have a better heat conduction effect, and can achieve the flame retardant protection effect of the cable by using the design of the sliding piece and the perforation structure in the heat conduction column. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the air pipe distribution structure of the present invention; Figure 3 It is a schematic diagram of the heat conduction sheet distribution structure of Embodiment 1 of the present invention; Figure 4 It is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 5 It is a schematic diagram of the heat conduction sheet distribution structure of Embodiment 2 of the present invention; Figure 6 It is a schematic diagram of the structure of the heat conduction sheet after deformation of the present invention; Figure 7 Schematic diagram of the distribution structure of the heat conducting sheet according to the third embodiment of the present invention; Figure 8 Schematic diagram of the distribution structure of the heat conducting columns according to the present invention; Figure 9 Schematic diagram of the internal structure of the heat conducting column according to the present invention; Figure 10 Schematic diagram of the distribution structure of the slots according to the present invention.

[0019] 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 implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 - 10 , the present invention provides the following technical solutions: Embodiment

[0022] Embodiment 1: The solution disclosed in this embodiment is to solve the problems existing in the prior art. The specific method is as Figures 1 - 3As shown in the figure, it includes a wire core 2 and an insulating layer 1 wrapped around its outer side. The outside of the insulating layer 1 is also wrapped with a forced cooling mechanism. The forced cooling mechanism includes a housing 3 distributed along the axis of the cable. One end of the housing 3 is provided with an air flow output port, and the other end is connected to an air flow input port through a trachea 4. The housing 3 is used to provide an air flow enclosure and a flow path space, and provides forced cooling of the cable by combining with a heat conducting member in the forced cooling mechanism. The heat conducting member includes a bottom plate 6 attached to the outer surface of the insulating layer 1 and heat conducting fins 5 installed on the surface of the bottom plate 6. The heat conducting fins 5 are distributed at equal angles with respect to the axis of the cable. A relatively closed air flow channel is formed between two adjacent heat conducting fins 5, and the air flow channel is respectively connected to at least one trachea 4 and the air flow output port. In traditional methods, directly using a fan or a pump device to cooperate with an air outlet mechanism to act on the surface of the cable is limited by the surface area and length of the cable. Therefore, in this embodiment, a relatively closed air flow space with an output and an input is formed around the cable. This space is formed by the housing 3 and the annular enclosures at its two ends, and the output and input are also provided in the enclosures. The trachea 4 as the input end is used to connect to an air pump or other devices. The air flow flowing in the housing 3 and cooperating with the heat conducting fins 5 that act as heat dissipation fins can achieve the effect of forced cooling and temperature reduction. At the same time, since the heat conducting fins 5 are installed on the surface of the insulating layer 1 through the bottom plate 6, the housing 3 and its enclosures at both ends can be set on the surface of the cable by a post-installation method. Therefore, this solution can not only be integrally formed and installed with a new cable, but also be post-installed in old cables with a strong cooling requirement, effectively reducing energy consumption and being more energy-saving and environmentally friendly.

[0023] Embodiment 2: In the solution disclosed in the embodiment, on the one hand, it is to provide a fin-type heat conduction and temperature reduction effect, and on the other hand, it is to provide a protection effect for the cable, such as Figures 4 - 6 As shown in the figure, the heat conducting fins 5 in the direction parallel to the axis of the cable are arranged at equal intervals and disconnected, and the bottom plate 6 for installing this group of heat conducting fins 5 is correspondingly disconnected or integrally arranged. At the same time, the heat conducting fins 5 are connected to a deformation mechanism and are used to guide the deformation of the heat conducting fins 5 when the temperature of the cable is too high. The deformation mechanism is composed of the heat conducting fins 5 themselves. The heat conducting fins 5 are made of a shape memory alloy material. The protection effect is mainly for the protection of the cable when it is subjected to pressure or impact force. The main method is to design the originally integral and whole heat conducting fins 5 into a multi-segment type in the axial direction. In this way, when a certain area is stressed, the non-rigid housing 3 will deform together with the elastic heat conducting fins 5 at the corresponding position, thus producing a good anti-impact and anti-puncture protection effect. On the other hand, as shown below: The cover 3 is made of a light-transmitting material. Since the heat-conducting sheet 5 itself is a shape-memory alloy material, when it is in an abnormally high-temperature state, the segmented heat-conducting sheet 5 around the corresponding section of the cable will actively deform, so that it is convenient for the staff to visually judge the position of the abnormal temperature of the cable. At the same time, after the heat-conducting sheet 5 deforms, its edge will contact the high-speed flowing air, and then produce a vibration effect to emit a sound with a specified frequency to play an auxiliary reminder effect.

[0024] Embodiment 3: Two solutions are disclosed in this embodiment. 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 drives the heat-conducting sheet to deform synchronously through active deformation or passive deformation. A heat-conducting column 8 is also installed on the lower end surface of the bottom sheet 6. The heat-conducting column 8 fits into a slot 12 integrally formed or drilled in the insulating layer 1, and the heat-conducting column 8 is used to improve the heat-conducting effect. A perforation 10 is opened at the bottom end of the heat-conducting column 8. The inner end of the perforation 10 is separated from the sliding sheet 9 elastically slidably installed inside the heat-conducting column 8 to form an accommodation space. At the same time, 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. One solution is that a flame-retardant medium such as flame-retardant sand is accommodated in the accommodation space below the sliding sheet 9. When the inside of 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 perforation 10 will not be blocked. At this time, driven by the rebound movement effect of the sliding sheet 9, the flame-retardant medium in the accommodation space will be squeezed and contact the melted or burning part of the cable through the perforation 10, so as to achieve a better auxiliary flame-retardant effect. At the same time, the movement of the sliding sheet 9 will drive the overall deformation of the metal sheet 7 through the connecting body 11 (such as a rope). On the one hand, it can achieve the reminder effect existing in the foregoing solution. On the other hand, it can wrap the cable and, to a certain extent, prevent the open flame from spreading further to the outside. The second solution is that when the inside of the cable is in an abnormally high-temperature state, that is, when the inside of the cable is in an abnormally high-temperature state and causes the insulating layer 1 to melt or even burn, the metal sheet 7, which is also a shape-memory alloy material, will actively deform and pull the sliding sheet 9 through the connecting body 11. Therefore, by using the negative pressure effect generated by the accommodation space, the insulating material that has already been in a burning or molten state is sucked into the accommodation space, and in this way, an effective auxiliary flame-retardant effect is achieved. Without a doubt, the above solutions will significantly increase the weight of the cable and the economic investment, and are not suitable for conventional cables. They can be used for high-voltage cables or factory equipment cables of ultra-high voltage according to the needs of downstream manufacturers.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forced-air-cooled cable, comprising a core (2) and an insulating layer (1) wrapped around the outside thereof, characterized in that: An external cooling mechanism is also wrapped around the insulation layer (1). The external cooling mechanism includes a housing (3) distributed along the axis of the cable. One end of the housing (3) is provided with an air flow outlet, and the other end is connected to an air flow inlet through a trachea (4). The housing (3) is used to provide an air flow enclosure and a space for the flow path, and provides forced cooling of the cable by combining with a heat conducting member in the external cooling mechanism.

2. The forced-cooling cable according to claim 1, wherein: The heat conducting member includes a bottom sheet (6) attached to the outer surface of the insulation layer (1) and heat conducting fins (5) installed on the surface of the bottom sheet (6). The heat conducting fins (5) are distributed at equal angles with respect to the axis of the cable.

3. The forced-air-cooled cable according to claim 2, characterized in that: A relatively closed air flow channel is formed between two adjacent heat conducting fins (5), and the air flow channel is respectively connected to at least one trachea (4) and the air flow outlet.

4. A forced-air-cooled cable according to claim 2 or 3, characterized in that: The heat conducting fins (5) in the direction parallel to the axis of the cable are arranged in an equally spaced and disconnected manner, and the bottom sheet (6) for installing the group of heat conducting fins (5) is correspondingly disconnected or integrally provided. At the same time, the heat conducting fins (5) are connected to a deformation mechanism and are used to guide the deformation of the heat conducting fins (5) when the temperature of the cable is too high.

5. The forced-cooling cable according to claim 4, characterized in that: The deformation mechanism is composed of the heat conducting fins (5) themselves, and the heat conducting fins (5) are made of a shape memory alloy material.

6. The forced-cooling cable according to claim 5, wherein: The housing (3) is made of a light-transmitting material.

7. The forced-cooling cable according to claim 6, characterized in that: The deformation mechanism can also be a metal sheet (7) used to connect the heat conducting fins (5) and the bottom sheet (6). The metal sheet (7) drives the heat conducting fins to deform synchronously through active deformation or passive deformation.

8. The forced-air-cooled cable according to claim 7, wherein: A heat conducting column (8) is also installed on the lower end surface of the bottom sheet (6). The heat conducting column (8) fits into a slot (12) integrally formed or drilled in the insulation layer (1), and the heat conducting column (8) is used to improve the heat conduction effect.

9. The forced-cooling cable according to claim 8, characterized in that: A perforation (10) is provided at the bottom end of the heat conducting column (8). The inner end of the perforation (10) is separated from a sliding sheet (9) elastically slidably installed inside the heat conducting column (8) to form an accommodation space. At the same time, the space above the sliding sheet (9) is a non-closed space, and the movement of the sliding sheet (9) is linked to the metal sheet (7) through a connecting body (11).

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