CN210403297U - Flexible mineral insulated cable copper sheath crack repairing structure - Google Patents
Flexible mineral insulated cable copper sheath crack repairing structure Download PDFInfo
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- CN210403297U CN210403297U CN201822268432.7U CN201822268432U CN210403297U CN 210403297 U CN210403297 U CN 210403297U CN 201822268432 U CN201822268432 U CN 201822268432U CN 210403297 U CN210403297 U CN 210403297U
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- insulated cable
- copper sheath
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Abstract
The utility model provides a flexible mineral insulated cable copper sheath crack repair structure, including welded structure, wherein, welded structure is obtained through the oxyacetylene gas welding by the phosphorus copper welding rod. The repairing structure is simple to operate, has wide repairing applicability, can be suitable for repairing various copper sheath cracks and holes, and has high sealing performance and high repairing strength after repairing; the service life of the cable can be prolonged, and the reliable operation of a cable system is promoted.
Description
Technical Field
The utility model belongs to the field is repaired to the copper sheath of flexible mineral insulated cable, in particular to flexible mineral insulated cable copper sheath crack repair structure.
Background
The flexible mineral insulated cable is a novel fireproof high-temperature-resistant cable, wherein a conductor adopts a stranded copper wire with good electric conductivity, insulation adopts a mica tape inorganic matter to wind, and a sheath adopts a corrugated copper tube. The cable can continuously work at a high temperature of 90 ℃, can continuously work at a high temperature of 1083 ℃ for a short time under special conditions, and has the characteristics of high temperature resistance of 950-1000 ℃, water immersion resistance, moisture resistance, no magnetic interference and the like.
When the copper sheath of the flexible mineral insulated cable is produced, the copper sheath is influenced by factors such as raw materials, equipment, processes and the like, various problems are difficult to avoid when the copper sheath is produced, wherein the problems are that welding joint rosin joint, desoldering, cracks of a copper pipe after embossing, integral fracture and the like are most frequently caused, the quality of the cable is reduced or the cable is scrapped, and great waste is caused. In the prior art, tin welding or direct cutting is often adopted, and an intermediate connector is adopted for joint treatment. The two methods have weak repairing applicability, the formed repairing structure has low strength and poor reliability, the repairing position is difficult to seal, and the use quality of the cable is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve above prior art, the technical problem that flexible mineral insulated cable copper sheath crack repair structural strength is low, the reliability is poor, the utility model provides a structure is repaired to flexible mineral insulated cable's copper sheath crack, should repair structure extensive applicability, repair intensity height, easy operation, leakproofness are good.
In order to achieve the above purpose, the utility model adopts the following scheme: a flexible mineral insulated cable copper sheath crack repairing structure comprises a welding structure, wherein the welding structure is obtained by carrying out oxyacetylene gas welding on a phosphorus copper welding rod.
Preferably, in the phosphor copper welding rod, the weight percentage of elements is as follows: 7-5% of phosphorus, 80-91% of copper and 15-2% of silver.
In any of the above schemes, preferably, the phosphor copper welding rod comprises the following elements by weight percent: 7% of phosphorus, 88% of copper and 5% of silver, namely a BCu88PAg phosphorus copper electrode.
In any of the above embodiments, preferably, the surface of the repair structure is finished by polishing.
In any of the above embodiments, preferably, the surface of the repaired structure has a rust preventive paint.
In any of the above embodiments, preferably, the color of the rust-proof paint is the same as the surface color of the copper sheath.
In any of the above solutions, the repairing structure is preferably welded by using an H02-1 micro welding torch. Other specifications of torches may be used, although the repair appearance is not as good. Because the repaired part is generally in a long slit shape, the flame of other types of welding torches is larger than the long slit shape, and the welding appearance is not easy to control.
The utility model discloses a nature mineral insulated cable copper sheath crack repair structure has following advantage: the method has the advantages of simple operation, wide repairing applicability, suitability for repairing various copper sheath cracks and holes, high sealing performance after repairing, and high repairing strength. The service life of the cable can be prolonged, and the reliable operation of a cable system is promoted.
Drawings
Fig. 1 is a schematic structural view of a copper sheath and a preferred embodiment of a crack repairing structure for a copper sheath of a flexible mineral insulated cable according to the present invention.
Detailed Description
In order to make the contents of the present invention more clear and correctly understood, the following further description and explanation are made in conjunction with the specific embodiments and the accompanying drawings.
Example 1
In this embodiment, a crack repairing structure for a copper sheath of a flexible mineral insulated cable is provided, as shown in fig. 1, the repairing structure is located at a crack position of a copper sheath 2 of a flexible mineral insulated cable, the repairing structure is composed of a welding structure 1, and the welding structure 1 is obtained by performing oxyacetylene gas welding on a phosphor-copper welding rod.
In this embodiment, the phosphor copper welding rod comprises the following elements by weight percent: 7% of phosphorus, 91% of copper and 2% of silver.
In the present embodiment, the forming process of the welded structure 1 is as follows:
and S1, processing the oxidized part of the surface of the repaired part by using a tool such as sand paper, a flat file and the like, and flattening the surface by using a proper tool to flatten the surface of the copper metal sheath. If the oil stain is adhered, the cleaning is carried out by absolute ethyl alcohol;
s2, using oxygen-acetylene flame gas welding, wherein the welding torch adopts an H02-1 micro welding torch, and the repaired part can be accurately welded; the welding rod is welded by adopting a phosphor copper flat welding rod;
s3, polishing and repairing the welding surface by using sand paper or a proper tool to make the surface smooth;
s4: and spraying antirust paint with the same color as the surface of the copper sheath to obtain the repair structure in the embodiment.
Example 2
The different from the embodiment 1, the flexible mineral insulated cable copper sheath crack repairing structure is obtained by performing oxyacetylene gas welding on a phosphorus-copper welding rod (namely BCu88PAg phosphorus-copper welding rod) with 7% of phosphorus, 88% of copper and 5% of silver by weight.
Example 3
The different from the embodiment 1, the flexible mineral insulated cable copper sheath crack repairing structure is obtained by performing oxyacetylene gas welding on a phosphor-copper welding rod with the elements of 5% by weight of phosphorus, 80% by weight of copper and 15% by weight of silver.
In order to highlight the characteristics of the flexible mineral insulated cable copper sheath crack repairing structure, the flexible mineral insulated cable copper sheath crack repairing structure is compared with the modes of a tin soldering bar and a silver-free phosphorus copper welding rod, and is called as a comparative example 1 and a comparative example 2 in the following, specifically as follows.
Comparative example 1
Different from the embodiment 1, the flexible mineral insulated cable copper sheath crack repairing structure is obtained by soldering tin solder.
Comparative example 2
Different from the embodiment 1, the flexible mineral insulated cable copper sheath crack repairing structure is obtained by a silver-free phosphorus-copper welding rod.
The bending properties, strength and sealing properties of the repaired structures obtained in the above examples and comparative examples were measured by the test method of GB/T34926-2017, and the results are shown in Table 1.
Table 1 shows the results of hardness, strength and sealing at the repaired site after completion of the repair
| Implementation sample | Repair part strength (Mpa) | Sealing property | Flexibility | Economy of use |
| Example 1 | 190 | Good effect | Has cracks | Good taste |
| Example 2 | 180 | Good effect | Without cracks | Good taste |
| Example 3 | 188 | Good effect | Without cracks | Difference (D) |
| Comparative example 1 | 15 | Good effect | Has cracks | Good taste |
| Comparative example 2 | 141 | Good effect | Has cracks | Good taste |
To sum up, the utility model provides a repair its intensity of structure and bending property can satisfy the requirement of the copper sheath when flexible mineral insulated cable copper sheath production process can and the job site installation lays completely. The method of oxyacetylene gas welding is adopted, the heat source is easy to obtain, and the method is more suitable for repairing the crack of the cable copper sheath and connecting the cable in remote project sites. Meanwhile, the cable has low cost, good reliability and good sealing performance of a connecting part, is not easy to damp, and can well solve the problem of the copper sheath of the neutral mineral insulated cable in the prior industry.
The utility model discloses in, used phosphorus copper welding rod is that market can purchase and obtain, the utility model discloses do not carry out any improvement to the constitution of phosphorus copper welding rod, the technology of oxygen acetylene gas welding and the formation company who repairs the structure.
It should be noted that the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a flexible mineral insulated cable copper sheath crack repair structure, includes welded structure, its characterized in that, welded structure is obtained by the oxyacetylene gas welding by the phosphorus copper welding rod, the phosphorus copper welding rod chooses BCu88PAg phosphorus copper welding rod for use, repair the structure surface and have the anti-rust paint.
2. The flexible mineral insulated cable copper sheath crack repair structure of claim 1, wherein the surface of the repair structure is finished by grinding.
3. The flexible mineral insulated cable copper sheath crack repair construction of claim 1, wherein the rust inhibitive paint color is the same as the copper sheath surface color.
4. The flexible mineral insulated cable copper sheath crack repair structure of claim 1, wherein the repair structure is obtained by welding with an H02-1 micro torch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822268432.7U CN210403297U (en) | 2018-12-29 | 2018-12-29 | Flexible mineral insulated cable copper sheath crack repairing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822268432.7U CN210403297U (en) | 2018-12-29 | 2018-12-29 | Flexible mineral insulated cable copper sheath crack repairing structure |
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| CN210403297U true CN210403297U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336438A (en) * | 2022-01-11 | 2022-04-12 | 四川新蓉电缆有限责任公司 | Method for repairing mineral insulated cable copper sheath |
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2018
- 2018-12-29 CN CN201822268432.7U patent/CN210403297U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336438A (en) * | 2022-01-11 | 2022-04-12 | 四川新蓉电缆有限责任公司 | Method for repairing mineral insulated cable copper sheath |
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