Highly heat-conductive flame-retardant cable

Abstract

The application discloses a high-heat-conducting flame-retardant cable and particularly relates to the technical field of flame-retardant cables, which comprises electric cores, flame-retardant parts, heat-conducting parts and adjusting parts, the electric cores are arranged in a circumferential array, the flame-retardant parts are arranged between two adjacent electric cores, and the two ends of each flame-retardant part are provided with receiving grooves; the heat-conducting part is arranged between two adjacent flame-retardant parts; and the adjusting part is arranged between the electric cores and can make the electric cores close to or away from the center of the array through elastic deformation. When the cable dissipates heat, the heat-conducting part is directly contacted with external air through the heat-conducting part and the heat-conducting groove, and the external airflow can blow the heat-conducting part when passing through the flow guide hole group, so that the heat dissipation efficiency is further improved, and the problem that the heat conduction capacity of the sheath after adding the flame retardant is usually poor and is not conducive to the heat conduction of the internal heat is solved.

Description

Technical Field

[0001] This invention relates to the field of flame-retardant cable technology, and more specifically, to a high thermal conductivity flame-retardant cable. Background Technology

[0002] With the continuous development of power transmission and communication technologies, cables are increasingly widely used in various industrial, construction, and transportation fields. Flame-retardant cables are special cables that can effectively suppress the spread of flames under fire conditions. By adding flame retardants to the sheath material, the cable is less likely to burn when in contact with a fire source, or it can quickly self-extinguish after leaving the fire source, thereby delaying the spread of fire along the line to the greatest extent and buying valuable time for personnel evacuation and fire fighting.

[0003] However, the thermal conductivity of the sheath after adding flame retardants is usually poor, which is not conducive to the dissipation of internal heat. Especially in high current and high power working environments, the internal conductors of the cable will generate a lot of heat due to the resistance effect. If the heat cannot be dissipated in time, the cable temperature will continue to rise, accelerating the aging of the insulation material and shortening the cable's service life. This contradiction makes it difficult for existing cables to meet the requirements of efficient heat dissipation and flame retardant safety under complex working conditions. Therefore, this invention proposes a high thermal conductivity flame retardant cable to solve the above problems. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a high thermal conductivity flame retardant cable to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high thermal conductivity flame-retardant cable, comprising: a battery core, a flame-retardant component, a heat-conducting component, and an adjusting component. The battery core is multiple and arranged in a circumferential array. The flame-retardant component is multiple and disposed between adjacent battery cores, with receiving grooves formed at both ends of each flame-retardant component. The heat-conducting component is disposed between two adjacent flame-retardant components. The adjusting component is disposed between the multiple battery cores, and the adjusting component can elastically deform to move the multiple battery cores closer to or further away from the center of the array. When the adjusting component moves the multiple battery cores closer to the center of the array, adjacent flame-retardant components move closer to each other; when the adjusting component moves the multiple battery cores further away from the center of the array, adjacent flame-retardant components move further away from each other; when two adjacent flame-retardant components move closer to each other until they contact, the heat-conducting component can be accommodated inside the two adjacent receiving grooves.

[0006] Preferably, an elastic element is provided between two adjacent flame-retardant elements, and the two ends of the elastic element are fixedly connected to the inner walls of two adjacent storage slots respectively. The heat-conducting elements are multiple and are respectively arrayed along the length direction of the elastic element inside the corresponding elastic element and fixedly connected to the elastic element.

[0007] Preferably, the adjusting member has an air chamber inside, a first through hole is provided on the side wall of the air chamber, a sealing member is provided inside the first through hole, and a second through hole is provided on the side wall of the adjusting member.

[0008] Preferably, an inner sheath is provided on the side of the multiple flame-retardant components away from the battery cell, and multiple heat-conducting grooves are formed on the side wall of the inner sheath, the heat-conducting grooves corresponding to the heat-conducting components.

[0009] Preferably, an outer sheath is fitted on the side of the inner sheath away from the flame-retardant component. The sidewall of the outer sheath has multiple sets of guide holes. Each set of guide holes consists of two symmetrically distributed guide holes. The guide holes are opened at an angle, and their axes form a certain angle with the central axis of the outer sheath.

[0010] Preferably, a temperature sensing element is provided between two adjacent heat conduction grooves, the sidewall of the temperature sensing element is in contact with the outer sheath, and the temperature sensing element can undergo elastic deformation when the temperature rises.

[0011] Preferably, the multiple sets of flow guide holes correspond to the heat conduction grooves, and the two flow guide holes in each set of flow guide holes are distributed at both ends of the corresponding heat conduction groove.

[0012] Preferably, the sealing element penetrates through the first through hole, and an elastic cup is provided at one end of the sealing element that extends into the air cavity. The outer diameter of the elastic cup is larger than the inner diameter of the first through hole, and the end of the sealing element away from the elastic cup extends into the second through hole.

[0013] Preferably, each of the battery cells is covered with an insulating sleeve, and the two ends of each flame-retardant component are in contact with the adjacent insulating sleeves. When the heat-conducting component is not housed inside the receiving groove, the heat-conducting component can contact the insulating sleeve, and the sidewalls of the adjusting component are in contact with multiple insulating sleeves.

[0014] Preferably, a filler is provided between the inner sheath and the flame-retardant component, the filler being able to fill the gap between the inner sheath and the flame-retardant component and support the inner sheath and the flame-retardant component.

[0015] The technical effects and advantages of this invention are as follows:

[0016] In this invention, during cable heat dissipation, the heat-conducting components and heat-conducting grooves directly contact the external air, and the external airflow can blow on the heat-conducting components when passing through the guide hole group, further improving the heat dissipation efficiency. This prevents the problem that the sheath with added flame retardants usually has poor thermal conductivity, which is not conducive to the discharge of internal heat. When the cable encounters a fire source, the flame retardant components come into contact with each other and wrap the battery core. The heat-conducting components are housed inside the receiving groove and no longer come into contact with the external flame and battery core, thereby preventing the temperature of the external flame from being directly transferred to the battery core through the heat-conducting components, further improving the fire resistance and flame retardant performance of the cable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the end face structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the end face structure of the heat-conducting component of the present invention housed inside the receiving groove.

[0021] Figure 5 For the present invention Figure 4 An enlarged schematic diagram of the structure of part A.

[0022] Figure 6 For the present invention Figure 4 An enlarged schematic diagram of the structure of part B.

[0023] The attached figures are labeled as follows: 1. Battery cell; 11. Insulating sleeve; 12. Filler; 2. Flame retardant component; 21. Storage groove; 22. Inner sheath; 23. Heat conduction groove; 24. Temperature sensing component; 3. Heat conduction component; 31. Elastic component; 32. Outer sheath; 321. Flow guide hole group; 4. Adjustment component; 41. Air cavity; 411. First through hole; 42. Sealing component; 43. Second through hole. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] In actual production, the thermal conductivity of the sheath after adding flame retardants is usually poor, which is not conducive to the dissipation of internal heat. This embodiment is invented to solve the above problem.

[0027] Please see Figures 1 to 6As shown, an embodiment of the present invention provides a high thermal conductivity flame-retardant cable, comprising a battery core 1, a flame-retardant component 2, a heat-conducting component 3, and an adjusting component 4. Multiple battery cores 1 are arranged in a circumferential array. Multiple flame-retardant components 2 are respectively disposed between adjacent battery cores 1, with receiving grooves 21 at both ends of each flame-retardant component 2. The heat-conducting component 3 is disposed between two adjacent flame-retardant components 2. The adjusting component 4 is disposed between multiple battery cores 1, and can elastically deform to move multiple battery cores 1 closer to or further away from the center of the array. When the adjusting component 4 moves multiple battery cores 1 closer to the center of the array, adjacent flame-retardant components 2 move closer to each other; when the adjusting component 4 moves multiple battery cores 1 further away from the center of the array, adjacent flame-retardant components 2 move further away from each other; when adjacent flame-retardant components 2 move closer to each other until they contact, the heat-conducting component 3 can be accommodated inside two adjacent receiving grooves 21. The flame-retardant component 2 is made of a flexible material, such as halogen-free low-smoke flame-retardant polyolefin, which is existing technology and will not be described in detail here.

[0028] Please see Figure 3 As shown, an elastic element 31 is provided between two adjacent flame-retardant components 2. The two ends of the elastic element 31 are fixedly connected to the inner walls of the two adjacent storage slots 21 respectively. There are multiple heat-conducting components 3, which are arranged in an array along the length direction of the elastic element 31 and are fixedly connected to the corresponding elastic element 31. The elastic element 31 is an elastic band. When two adjacent flame-retardant components 2 move away from each other, the elastic element 31 is stretched to prevent external dust from entering the inside of the flame-retardant component 2.

[0029] Please see Figure 4 and Figure 6 As shown, the adjusting component 4 has an air chamber 41 inside, and a first through hole 411 is opened on the side wall of the air chamber 41. A sealing component 42 is installed inside the first through hole 411. A second through hole 43 is opened on the side wall of the adjusting component 4. The air chamber 41 can be filled with inert gas or liquid. The filling medium can expand when heated. When filled with liquid, the high temperature generated by the battery cell 1 causes the liquid to vaporize and absorb heat, which can further cool the battery cell 1. This is the prior art and will not be described in detail here.

[0030] Please see Figure 2 and Figure 3 As shown, an inner sheath 22 is provided on the side of the multiple flame-retardant components 2 away from the battery cell 1. Multiple heat-conducting grooves 23 are provided on the side wall of the inner sheath 22. The heat-conducting grooves 23 correspond to the heat-conducting components 3. When two adjacent flame-retardant components 2 are far apart from each other, the heat-conducting components 3 can enter the interior of the heat-conducting grooves 23.

[0031] Please see Figure 2 and Figure 3As shown, an outer sheath 32 is fitted on the side of the inner sheath 22 away from the flame retardant component 2. Multiple sets of guide hole groups 321 are opened on the side wall of the outer sheath 32. Each set of guide hole groups 321 consists of two symmetrically distributed guide holes. The guide holes are opened at an angle, and their axes form a certain angle with the central axis of the outer sheath 32.

[0032] Please see Figure 4 and Figure 5 As shown, a temperature sensing element 24 is provided between two adjacent heat conduction grooves 23. The side wall of the temperature sensing element 24 is in contact with the outer sheath 32. The temperature sensing element 24 can undergo elastic deformation when the temperature rises. The temperature sensing element 24 can undergo elastic deformation when the temperature rises, such as a bimetallic strip. This is existing technology and will not be limited here, nor will it be described in detail.

[0033] Please see Figure 3 As shown, multiple sets of flow guide holes 321 correspond to the heat conduction grooves 23, and two flow guide holes in each set of flow guide holes 321 are distributed at both ends of the corresponding heat conduction grooves 23.

[0034] Please see Figure 4 and Figure 6 As shown, the seal 42 penetrates the first through hole 411. One end of the seal 42 that extends into the air cavity 41 is provided with an elastic cup. The outer diameter of the elastic cup is larger than the inner diameter of the first through hole 411. The end of the seal 42 that is away from the elastic cup extends into the second through hole 43. When the seal 42 is squeezed, the elastic cup can undergo elastic deformation and pass through the first through hole 411.

[0035] Please see Figure 3 As shown, each battery cell 1 is covered with an insulating sleeve 11, combined with... Figure 1 and Figure 2 As shown, each flame-retardant component 2 has its two ends in contact with its adjacent insulating sleeve 11. When the heat-conducting component 3 is not housed inside the receiving groove 21, the heat-conducting component 3 can contact the insulating sleeve 11. The sidewall of the adjusting component 4 is in contact with multiple insulating sleeves 11.

[0036] Please see Figure 2 and Figure 4 As shown, a filler 12 is provided between the inner sheath 22 and the flame retardant 2. The filler 12 can fill the gap between the inner sheath 22 and the flame retardant 2 and support the inner sheath 22 and the flame retardant 2. The filler 12 can be filled with inert gas or flame retardant.

[0037] In use, multiple battery cells 1 are fixedly supported by the air chamber 41 and multiple flame-retardant components 2. When the internal temperature of the battery cell 1 is high, the medium inside the air chamber 41 expands due to heat, causing the air chamber 41 to elastically deform and extend outward. This causes the multiple battery cells 1 to push the multiple flame-retardant components 2 outward, thereby stretching the elastic component 31. The multiple battery cells 1 come into contact with the heat-conducting component 3 on the elastic component 31, pushing the heat-conducting component 3 into the heat-conducting groove 23. Through the contact between the battery cells 1 and the heat-conducting component 3, the heat in the battery cells 1 is transferred to the interior of the heat-conducting component 3. When the external airflow... When the airflow passes through the surface of the outer sheath 32, some of the airflow can enter the heat conduction groove 23 through the guide hole group 321 and blow on the heat conduction element 3, thereby dissipating heat from the battery cell 1. This allows the battery cell 1 inside the cable to directly contact the outside air through the heat conduction element 3 and the heat conduction groove 23 when dissipating heat, without the need for a sheath with poor thermal conductivity. Furthermore, the external airflow blowing on the heat conduction element 3 through the guide hole group 321 further improves the heat dissipation efficiency and prevents the problem that the sheath with added flame retardant usually has poor thermal conductivity, which is not conducive to the removal of internal heat.

[0038] Example 2

[0039] In actual use, it was found that the heat conduction groove 23 is connected to the outside through the flow guide hole group 321, resulting in poor fire resistance and flame retardancy. Furthermore, when the cable comes into contact with a fire source, the temperature of the external flame can be transferred to the inside of the battery cell 1 through the heat conduction component 3. Further improvements were made based on the above embodiment.

[0040] Based on the above embodiments, during use, when a fire occurs outside the cable or the cable comes into contact with a fire source, the flame causes the temperature of the outer sheath 32 to rise. Since the temperature sensing element 24 inside the inner sheath 22 is in contact with the inner wall of the outer sheath 32, the temperature of the temperature sensing element 24 inside the inner sheath 22 near the flame rises, causing elastic deformation. This causes the temperature sensing element 24 to bend and compress the battery cell 1 towards the battery cell 1. The compression of the battery cell 1 by the temperature sensing element 24 increases the pressure inside the air cavity 41, thereby increasing the pressure at which the sealing element 42 is pushed out of the first through hole 411. When the pressure on the sealing element 42 increases, causing the elastic cup to deform and pass through the first through hole 411, the sealing element 42 detaches from the air cavity 41. At this time, the gas inside the air cavity 41 can be discharged outward through the first through hole 411 and the second through hole 43, thereby causing the air cavity 41 to undergo elastic deformation and contraction. As a result, the battery cell 1 moves towards the center of the array and no longer squeezes the flame-retardant component 2, thereby causing the elastic component 31 to contract and drive the two adjacent flame-retardant components 2 to move closer to each other. When the two adjacent flame-retardant components 2 come into contact with each other, the heat-conducting component 3 is housed inside the receiving groove 21, thereby preventing the heat-conducting component 3 from coming into contact with the external flame and the battery cell 1. This prevents the temperature of the external flame from being directly transferred to the inside of the battery cell 1 through the heat-conducting component 3. Through the contact between the internal flame-retardant components 2, the battery cell 1 is wrapped, further improving the fire-resistant and flame-retardant performance of the cable.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high thermal conductivity and flame retardant cable, comprising multiple battery cells arranged in a circumferential array, characterized in that, Also includes: Flame-retardant components, wherein there are multiple flame-retardant components and they are respectively disposed between two adjacent battery cells, and each of the flame-retardant components has a storage groove at both ends; A heat-conducting component, wherein the heat-conducting component is disposed between two adjacent flame-retardant components; An adjusting element is disposed among multiple battery cells, and the adjusting element is capable of elastically deforming the multiple battery cells to move closer to or away from the center of the array; When the adjusting member brings multiple battery cells closer to the center of the array, two adjacent flame-retardant members move closer to each other. When the adjusting member moves multiple battery cells away from the center of the array, two adjacent flame-retardant members move further away from each other. When two adjacent flame-retardant members move closer to each other until they come into contact, the heat-conducting member can be accommodated inside two adjacent storage slots.

2. The high thermal conductivity and flame retardant cable according to claim 1, characterized in that: An elastic element is provided between two adjacent flame-retardant elements. The two ends of the elastic element are fixedly connected to the inner walls of two adjacent storage slots, respectively. There are multiple heat-conducting elements, which are arranged in an array along the length of the elastic element and are fixedly connected to the elastic element.

3. The high thermal conductivity flame-retardant cable according to claim 1, characterized in that: The adjusting component has an air chamber inside, and a first through hole is provided on the side wall of the air chamber. A sealing element is provided inside the first through hole, and a second through hole is provided on the side wall of the adjusting component.

4. The high thermal conductivity flame-retardant cable according to claim 1, characterized in that: An inner sheath is provided on the side of the flame-retardant components away from the battery cell. Multiple heat-conducting grooves are provided on the side wall of the inner sheath, and the heat-conducting grooves correspond to the heat-conducting components.

5. The high thermal conductivity flame-retardant cable according to claim 4, characterized in that: An outer sheath is fitted on the side of the inner sheath away from the flame-retardant component. The sidewall of the outer sheath has multiple sets of guide holes. Each set of guide holes consists of two symmetrically distributed guide holes. The guide holes are opened at an angle, and their axes form a certain angle with the central axis of the outer sheath.

6. The high thermal conductivity flame-retardant cable according to claim 5, characterized in that: A temperature sensing element is provided between two adjacent heat conduction grooves. The side wall of the temperature sensing element is in contact with the outer sheath. The temperature sensing element can undergo elastic deformation when the temperature rises.

7. The high thermal conductivity and flame retardant cable according to claim 6, characterized in that: The multiple sets of flow guide holes correspond to the heat conduction grooves, and the two flow guide holes in each set of flow guide holes are distributed at both ends of the corresponding heat conduction groove.

8. The high thermal conductivity flame-retardant cable according to claim 3, characterized in that: The sealing element penetrates through the first through hole, and an elastic cup is provided at one end of the sealing element that extends into the air cavity. The outer diameter of the elastic cup is larger than the inner diameter of the first through hole, and the end of the sealing element away from the elastic cup extends into the second through hole.

9. The high thermal conductivity flame-retardant cable according to claim 1, characterized in that: Each of the battery cells is covered with an insulating sleeve. The two ends of each flame-retardant component are in contact with the adjacent insulating sleeves. When the heat-conducting component is not housed inside the receiving groove, the heat-conducting component can contact the insulating sleeve. The sidewalls of the adjusting component are in contact with multiple insulating sleeves.

10. The high thermal conductivity flame-retardant cable according to claim 9, characterized in that: A filler is provided between the inner sheath and the flame-retardant component. The filler can fill the gap between the inner sheath and the flame-retardant component and support the inner sheath and the flame-retardant component.

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