CN108074669B - Compact structure's variable prevents overheated cable - Google Patents
Compact structure's variable prevents overheated cable Download PDFInfo
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- CN108074669B CN108074669B CN201711218542.6A CN201711218542A CN108074669B CN 108074669 B CN108074669 B CN 108074669B CN 201711218542 A CN201711218542 A CN 201711218542A CN 108074669 B CN108074669 B CN 108074669B
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- groove
- movable block
- sheath
- outer sheath
- cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
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Abstract
The invention discloses a variable overheating-proof cable with a compact structure, which comprises: the cable core and in proper order the cladding around the cable core periphery around covering, shielding layer, inner sheath and oversheath, wherein: the outer sheath is provided with a first groove, the bottom of the first groove is provided with a second groove, and a head sealing part is arranged in the first groove; a movable block is arranged in the second groove; one side of the movable block, which is close to the bottom of the second groove, is fixed with the bottom wall of the second groove, and one side of the movable block, which is far away from the bottom wall of the second groove, is fixed with the end enclosure part; an expansion body extending in the same direction as the movable block is arranged between the outer sheath and the inner sheath, the expansion body is made of thermal expansion materials, one side of the expansion body is fixed with the bottom surface of the second groove, and the side, far away from the bottom surface of the second groove, of the expansion body is fixed with the inner sheath. The invention can automatically change the external structure thereof according to the change of the internal heat, and has compact and reasonable structure and good roundness of the external shape in the initial state.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a variable anti-overheating cable with a compact structure.
Background
When the power cable passes through a certain load current, the power cable can generate heat certainly, the surface temperature of the power cable is higher along with the increase of the load current, and the consequences can not be imagined if the power cable is not processed in time.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a variable anti-overheating cable with a compact structure, which is reasonable and attractive in structure, and can automatically make corresponding changes to the structure according to the change of internal heat so as to accelerate the heat dissipation of the cable when the cable is overheated and keep the cable in an inherent state when the temperature of the cable is normal.
The invention provides a variable overheating-proof cable with a compact structure, which comprises: the cable core and in proper order the cladding around the cable core periphery around covering, shielding layer, inner sheath and oversheath, wherein:
the outer sheath is provided with a first groove which extends linearly along the length direction of the outer sheath; the bottom of the first groove is provided with a second groove extending in the same direction as the first groove, and the width of the first groove is larger than that of the second groove so as to form step surfaces on two sides of the notch of the second groove;
an end enclosure part which extends in the same direction as the first groove and is matched with the first groove in width is arranged in the first groove, the side surface of the end enclosure part, which is far away from the second groove, is an arc surface, and when the end enclosure part is attached to the step surface, the arc surface of the end enclosure part and the outer peripheral surface of the outer sheath are positioned in the same annular surface;
the second groove is formed by the bottom surface of the first groove sinking towards the inner sheath direction, and a movable block which extends in the same direction and is matched with the second groove in width is arranged in the second groove; one side of the movable block, which is close to the bottom of the second groove, is fixed with the bottom wall of the second groove, and one side of the movable block, which is far away from the bottom wall of the second groove, is fixed with the end enclosure part;
an expansion body extending in the same direction as the movable block is arranged between the outer sheath and the inner sheath, the expansion body is made of thermal expansion materials, one side of the expansion body is fixed with the bottom surface of the second groove, and the side, far away from the bottom surface of the second groove, of the expansion body is fixed with the inner sheath.
Preferably, the head portion is made of a heat shrinkable material and is in interference fit with the first groove.
Preferably, the step surface is provided with a sealing groove extending in the same direction as the first groove, one side of the seal head part close to the step surface is provided with a sealing strip extending in the same direction as the seal head part, and when the sealing strip is positioned in the sealing groove, the arc surface of the seal head part and the outer peripheral surface of the outer sheath are positioned in the same annular surface.
Preferably, both sides of the extending direction of the expansion body are provided with limiting bodies used for circumferentially limiting the expansion body, and both sides of the limiting bodies are respectively connected with the inner wall of the outer sheath and the outer wall of the inner sheath.
Preferably, the inner jacket layer is made of a hard material.
Preferably, a gap between the inner circumferential surface of the outer sheath and the outer circumferential surface of the inner sheath is provided with a filler, and the filler is made of a heat shrinkable material and fixed with the outer sheath and the inner sheath respectively.
Preferably, the first grooves are annularly and uniformly distributed on the circumferential surface of the outer sheath, the head sealing part is arranged in any one of the first grooves, the second groove is arranged at the bottom of any one of the first grooves, and the movable block is arranged in any one of the second grooves.
According to the invention, the outer sheath is provided with the first groove, the head sealing part is arranged in the first groove, the bottom of the first groove is provided with the second groove, the second groove is internally provided with the movable block, the expansion body is arranged between the outer sheath and the inner sheath, one side of the movable block is fixed with the head sealing part, the other side of the movable block is fixed with the bottom wall of the second groove, the expansion body is made of thermal expansion materials, one side of the expansion body is fixed with the bottom surface of the second groove, and the other side of the expansion body is fixed with the inner sheath. When the cable temperature exceeds a preset value, the expansion body is heated to expand to push the bottom surface of the second groove to move towards the direction of the first groove until the groove bottom of the second groove is outwards turned to form a bulge on the periphery of the cable, so that the heat dissipation area of the cable is increased, meanwhile, the outwards turned second groove pushes the movable block to outwards move, so that other cable lines around the cable are pushed to one side by the aid of thrust of the movable block, a certain ventilation space is reserved on the periphery of the cable, and when the cable temperature is normal, all corresponding parts are reset, so that the cable structure has good roundness in appearance.
In summary, the variable overheating-proof cable with a compact structure provided by the present invention not only can automatically change its external structure according to the change of its internal heat, but also can ensure good roundness in appearance while maintaining its inherent state, and can structurally make the first groove and the second groove have good sealing performance.
Drawings
Fig. 1 is a cross-sectional view of a variable overheating prevention cable according to the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Fig. 1 is a cross-sectional view of a variable overheating prevention cable according to the present invention, which is compact, as shown in fig. 1.
Referring to fig. 1, a variable overheating prevention cable with a compact structure according to an embodiment of the present invention includes: cable core 1 and cladding in proper order are around covering 2, shielding layer 3, inner sheath 4 and oversheath 5 of 1 periphery of cable core, wherein:
the outer sheath 5 is provided with a first groove which extends linearly along the length direction of the outer sheath; the bottom of the first groove is provided with a second groove extending in the same direction as the first groove, and the width of the first groove is larger than that of the second groove so as to form step surfaces on two sides of the notch of the second groove. An end socket part 6 which extends in the same direction and is matched with the first groove in width is arranged in the first groove, the side surface of the end socket part 6, which is far away from the second groove, is an arc surface, and when the end socket part 6 is attached to a step surface, the arc surface of the end socket part 6 and the outer peripheral surface of the outer sheath 5 are positioned in the same annular surface; the second groove is formed by the bottom surface of the first groove sinking towards the inner sheath 4, and a movable block 7 which extends in the same direction and is matched with the second groove in width is arranged in the second groove; one side of the movable block 7 close to the bottom of the second groove is fixed with the bottom wall of the second groove, and one side of the movable block 7 far away from the bottom wall of the second groove is fixed with the end enclosure part 6, so that the movable block 7 and the end enclosure part 6 are integrated.
An expansion body 8 extending in the same direction as the movable block 7 is arranged between the outer sheath 5 and the inner sheath 4, and the expansion body 8 is made of thermal expansion materials so as to generate a certain expansion amount when being heated. One side of the expansion body 8 is fixed with the bottom surface of the second groove, and one side of the expansion body, which is far away from the bottom surface of the second groove, is fixed with the inner sheath 4, so that the expansion body 8 can push the bottom surface of the second groove to be convex in the direction far away from the inner sheath 4 in the telescopic process.
When the temperature of the cable exceeds a preset value, the expansion body 8 is heated to expand to push the bottom surface of the second groove to move towards the first groove until the groove bottom of the second groove is outwards turned to form a bulge on the periphery of the cable so as to increase the heat dissipation area of the cable, meanwhile, the outwards turned second groove pushes the movable block 7 to outwards move, so that other cables around the cable are pushed to one side by utilizing the thrust of the movable block 7, a certain ventilation space is ensured on the periphery of the cable, and when the temperature of the cable is normal, all corresponding parts are reset so as to ensure that the cable has good roundness on the appearance, so that the first groove and the second groove have good sealing performance structurally, and the cable has good compactness on the whole.
Therefore, the variable anti-overheating cable with the compact structure can automatically change the external structure thereof correspondingly according to the change of the internal heat so as to accelerate the heat dissipation or restore the original state. Meanwhile, when the sealing structure is kept in an inherent state, good roundness can be guaranteed in appearance, and the first groove and the second groove can have good sealing performance in structure.
In addition, in this embodiment, the first grooves are provided with a plurality of, and each first groove is annularly and evenly distributed on the circumferential surface of the outer sheath 5, and the inside of any one first groove is provided with the head sealing part 6, the bottom of any one first groove is provided with the second groove, and the inside of any one second groove is provided with the movable block 7.
In this embodiment, the sealing head portion 6 is made of a thermal contraction material and is in interference fit with the first groove, so that when the cable is used, the sealing head portion 6 and the first groove have good sealing performance at a preset temperature, and when the temperature of the cable is higher than the preset temperature, the sealing head portion 6 and the first groove are in clearance fit to facilitate the movable block 7 to push the sealing head portion 6 to move outwards synchronously.
In this embodiment, the step surface is provided with a sealing groove extending in the same direction as the first groove, one side of the end enclosure portion 6 close to the step surface is provided with a sealing strip 61 extending in the same direction as the step surface, and when the sealing strip 61 is located in the sealing groove, the arc surface of the end enclosure portion 6 and the outer peripheral surface of the outer sheath 5 are located in the same annular surface, so as to improve the sealing performance between the end enclosure portion 6 and the first groove in the normal temperature state of the cable.
In this embodiment, both sides of the extending direction of the expansion body 8 are provided with a limiting body 9 for circumferentially limiting the expansion body 8, and both sides of the limiting body 9 are connected with the inner wall of the outer sheath 5 and the outer wall of the inner sheath 4 respectively. So that when the expansion body 8 is heated, the expansion amount is fully used for pushing the movable block 7 to move. In addition, in this embodiment, the inner sheath 4 is made of a hard material, so that when the expansion body 8 is heated, the expansion body can only extend and retract to the outer side of the inner sheath 4, thereby improving the effective utilization rate of the thermal expansion amount of the expansion body 8.
In this embodiment, a gap between the inner circumferential surface of the outer sheath 5 and the outer circumferential surface of the inner sheath 4 is provided with a filler 10, and the filler 10 is made of a heat shrinkable material and fixed to the outer sheath 5 and the inner sheath 4, respectively. When the heat of the cable exceeds a preset value, the filling body 10 can pull the outer sheath 5 to be tightened towards the inner side of the cable, so that the space between the periphery of the cable and other cables is enlarged, the air circulation surface is further enlarged, and the heat dissipation effect is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A variable overheating prevention cable with a compact structure, comprising: cable core (1) and in proper order the cladding around cable core (1) periphery around covering (2), shielding layer (3), inner sheath (4) and oversheath (5), wherein:
the outer sheath (5) is provided with a first groove which extends linearly along the length direction of the outer sheath; the bottom of the first groove is provided with a second groove extending in the same direction as the first groove, and the width of the first groove is larger than that of the second groove so as to form step surfaces on two sides of the notch of the second groove;
an end enclosure part (6) which extends in the same direction and is matched with the first groove in width is arranged in the first groove, the side surface of the end enclosure part (6) far away from the second groove is an arc surface, and when the end enclosure part (6) is attached to the step surface, the arc surface of the end enclosure part (6) and the outer peripheral surface of the outer sheath (5) are positioned in the same annular surface;
the second groove is formed by the bottom surface of the first groove sinking towards the inner sheath (4), and a movable block (7) which extends in the same direction and is matched with the second groove in width is arranged in the second groove; one side of the movable block (7) close to the bottom of the second groove is fixed with the bottom wall of the second groove, and one side of the movable block (7) far away from the bottom wall of the second groove is fixed with the end enclosure part (6);
an expansion body (8) extending in the same direction as the movable block (7) is arranged between the outer sheath (5) and the inner sheath (4), the expansion body (8) is made of thermal expansion materials, one side of the expansion body (8) is fixed with the bottom surface of the second groove, and the side of the expansion body far away from the bottom surface of the second groove is fixed with the inner sheath (4).
2. The compactly structured variable overheating prevention cable according to claim 1, wherein the head sealing portion (6) is made of a heat shrinkable material and is in interference fit with the first groove.
3. The variable overheating-preventing cable with the compact structure as recited in claim 1, wherein the step surface is provided with a sealing groove extending in the same direction as the first groove, one side of the sealing head portion (6) close to the step surface is provided with a sealing strip (61) extending in the same direction as the step surface, and when the sealing strip (61) is located in the sealing groove, the arc surface of the sealing head portion (6) and the outer circumferential surface of the outer sheath (5) are located in the same annular surface.
4. The variable overheating-prevention cable with the compact structure according to claim 1 is characterized in that limiting bodies (9) for limiting the expansion bodies (8) circumferentially are arranged on two sides of the expansion bodies (8) in the extending direction, and two sides of each limiting body (9) are respectively connected with the inner wall of the outer sheath (5) and the outer wall of the inner sheath (4).
5. The compactly structured variable overheating-prevention cable according to claim 1, wherein the inner sheath (4) layer is made of a hard material.
6. The compactly configurable variable overheat prevention cable according to claim 1, wherein a filler (10) is provided in a gap between an inner circumferential surface of the outer sheath (5) and an outer circumferential surface of the inner sheath (4), and the filler (10) is made of a heat shrinkable material and fixed to the outer sheath (5) and the inner sheath (4), respectively.
7. The structurally compact variable overheating-prevention cable according to any one of claims 1 to 6, wherein a plurality of first grooves are formed, each first groove is annularly and uniformly distributed on the circumferential surface of the outer sheath (5), a head portion (6) is arranged inside any one first groove, a second groove is arranged at the bottom of any one first groove, and a movable block (7) is arranged inside any one second groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218542.6A CN108074669B (en) | 2017-11-28 | 2017-11-28 | Compact structure's variable prevents overheated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218542.6A CN108074669B (en) | 2017-11-28 | 2017-11-28 | Compact structure's variable prevents overheated cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108074669A CN108074669A (en) | 2018-05-25 |
| CN108074669B true CN108074669B (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711218542.6A Active CN108074669B (en) | 2017-11-28 | 2017-11-28 | Compact structure's variable prevents overheated cable |
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| CN (1) | CN108074669B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883309B (en) * | 2020-06-18 | 2021-08-13 | 广东祥利塑料有限公司 | Congeal scattered self-control formula cable sheath |
| CN112289496B (en) * | 2020-10-12 | 2022-04-08 | 湖北特缆集团有限公司 | Multi-core cable with fire-resistant and waterproof functions and connector device thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016010205A1 (en) * | 2014-07-18 | 2016-01-21 | 권병운 | Conduit |
| CN106683782A (en) * | 2015-11-11 | 2017-05-17 | 衡阳恒飞电缆有限责任公司 | Temperature reducing type electric power and signal composite cable |
-
2017
- 2017-11-28 CN CN201711218542.6A patent/CN108074669B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016010205A1 (en) * | 2014-07-18 | 2016-01-21 | 권병운 | Conduit |
| CN106683782A (en) * | 2015-11-11 | 2017-05-17 | 衡阳恒飞电缆有限责任公司 | Temperature reducing type electric power and signal composite cable |
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| Publication number | Publication date |
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| CN108074669A (en) | 2018-05-25 |
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Effective date of registration: 20191129 Address after: 650000 Yunnan Province, Kunming city high tech Development Zone Jinpu Street Office No. 88 Wen Xing Lu Applicant after: Yunnan Duobao cable group Limited by Share Ltd Address before: 238300 Ruikan Cable Company, Rixin Section of Wuwei High-tech Avenue, Wuhu City, Anhui Province Applicant before: Anhui Ruikan Science Cable Co., Ltd. |
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