CN113224725A - Non-fusion connection fireproof cable joint and construction process thereof - Google Patents
Non-fusion connection fireproof cable joint and construction process thereof Download PDFInfo
- Publication number
- CN113224725A CN113224725A CN202110412669.1A CN202110412669A CN113224725A CN 113224725 A CN113224725 A CN 113224725A CN 202110412669 A CN202110412669 A CN 202110412669A CN 113224725 A CN113224725 A CN 113224725A
- Authority
- CN
- China
- Prior art keywords
- cable core
- cable
- jacket
- insulating layer
- copper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000008569 process Effects 0.000 title claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 83
- 229910052802 copper Inorganic materials 0.000 claims abstract description 81
- 239000010949 copper Substances 0.000 claims abstract description 81
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 239000011810 insulating material Substances 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 6
- 230000002265 prevention Effects 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 27
- 239000003921 oil Substances 0.000 claims description 18
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 239000002390 adhesive tape Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 10
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 9
- 238000005219 brazing Methods 0.000 claims description 7
- 239000010724 circulating oil Substances 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 238000007526 fusion splicing Methods 0.000 claims 6
- 230000009970 fire resistant effect Effects 0.000 claims 4
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005476 soldering Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 235000014121 butter Nutrition 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
Landscapes
- Cable Accessories (AREA)
Abstract
The invention discloses a non-melting connection fireproof cable joint which comprises a copper sleeve, an insulating layer, a waterproof layer and an outer sheath, wherein a first cable core and a second cable core to be connected are installed in the copper sleeve, the copper sleeve and the first cable core and the second cable core are in interference fit, the insulating layer wraps the copper sleeve, the first cable core and the second cable core, and the waterproof layer and the outer sheath are sequentially arranged on the outer layer of the insulating layer. The connector has the advantages of good fireproof performance, mechanical protection, buffer protection for the insulating layer and the cable core, radial sealing, water and moisture prevention, short-circuit current conduction in case of failure, longitudinal water resistance in case of accident and the like; the invention also discloses a corresponding construction process, and the cooling system is adopted to accelerate the cooling of the insulating material and improve the working efficiency.
Description
Technical Field
The invention relates to the technical field of power grid construction, in particular to a non-fusion connection fireproof cable joint and a construction process thereof.
Background
With the development of power grids and the improvement of urban networks, the occupied proportion of cables in power grid lines is increasing day by day, the corresponding fault rate of the cables is also increasing continuously, the cables must be reconnected to recover power supply under the condition of breakage, and at present, a prefabricated cable intermediate joint is mostly combined and sleeved on a cable main body on site to recover the connection of the two cables. However, most wire cores of the connector are mechanically connected in a compression joint or bolt twisting mode, the contact resistance of the connection part is large, heating is easily caused, cable overload is easily caused after long-time high-voltage use, and even a large accident is caused by heating and explosion of a cable middle connector. Meanwhile, the existing cable joint is poor in waterproofness generally.
In view of the above technical problems, the chinese utility model patent publication No. 210110386U discloses a waterproof and fireproof cable, which includes a conductor, a conductor shielding layer, an insulating layer, a shielding layer, a metal shielding layer, a waterproof layer, a fireproof layer, an armor layer and a sheath, which are sequentially arranged from the inside to the outside; the waterproof layer comprises a semiconductive water-blocking belting layer, an aluminum-plastic composite belting layer and a high-density polyethylene layer; the semiconductive water-blocking belting layer is wrapped outside the metal shielding layer, the aluminum-plastic composite belting layer is longitudinally wrapped outside the semiconductive water-blocking belting layer, and the high-density polyethylene layer is extruded and molded outside the aluminum-plastic composite belting layer and is fixedly connected with the aluminum-plastic composite belting layer into a whole; the fire-proof layer comprises a halogen-free low-smoke high-flame-retardant polyolefin fire-proof layer. By providing a waterproof layer and a fireproof layer, both waterproof and fireproof properties can be achieved.
However, such a cable structure is relatively complicated and is difficult to implement in the actual cable joint construction work. In addition, the existing cable joint installation process has the problems of difficult construction and long construction period due to the need of using a special welding device, and in the society of high-speed development at present, the cable fault easily brings huge economic loss to people, so that how to quickly construct the cable and repair the cable fault becomes the problem of great importance in the industry.
Disclosure of Invention
One of the purposes of the invention is to provide a non-fusion connection fireproof cable joint structure which can be conveniently installed and has good fireproof performance;
the second purpose of the invention is to provide a construction process of a non-fusion connection fireproof cable joint, which is convenient to construct, does not need to borrow special hot-melting equipment, and improves the working efficiency of cable construction.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a non-melting connects fireproof cable connects, includes copper sheathing, insulating layer, waterproof layer and oversheath, two first cable cores and the second cable core of treating the connection of installation in the copper sheathing, the copper sheathing with adopt interference fit between first cable core and the second cable core, make the inner wall of copper sheathing with the outer wall of first cable core and second cable core closely laminates, and the electric conductive property of guaranteeing to connect the department is good, the insulating layer parcel copper sheathing, first cable core and second cable core, waterproof layer and oversheath set gradually the skin of insulating layer.
Furthermore, the interference magnitude of the first cable core, the second cable core and the copper sleeve is 0-0.02 mm.
Furthermore, the copper sleeve and the first cable core and the second cable core are positioned and fixed through a plurality of rivets, so that the joint is firmer.
Furthermore, the surface of copper sheathing still is provided with temperature sensor, carries out real time monitoring to the operating temperature of copper sheathing (especially first cable core and second cable core joint department), guarantees the cable safety, but the connection alarm system, if surpass safe temperature can the police dispatch newspaper, reaches the fire prevention purpose.
Furthermore, two ends of the copper sleeve are respectively fixed with the first cable core and the second cable core through brazing, and the area of the brazing position is not less than 1cm2。
Furthermore, the copper sleeve can be replaced by a silver sleeve or an aluminum sleeve according to the requirement of the electric conductivity, so that the first cable core and the second cable core are matched. Similarly, the rivet can also be made of copper, silver, aluminum or other metals with excellent conductive performance.
Furthermore, the insulating layer is made of cross-linked polyethylene (XLPE), which is a network structure after cross-linking, and the structure has strong deformation resistance even at high temperature. The cross-linked polyethylene has excellent electrical performance, the dielectric loss is less than that of polyvinyl chloride (PVC) insulation, and the cable made of the cross-linked polyethylene is easy to lay.
Further, the waterproof layer adopts waterproof adhesive tape or waterproof plastic cloth to wind the package and forms, the thickness of waterproof layer is between 0.2 ~ 2mm, and the waterproof layer is used for improving water-proof effects, stops the short circuit and produces the explosion.
Further, the outer sheath is made of polyethylene or polyvinyl chloride.
Based on the non-fused connection fireproof cable joint, the invention also discloses a construction process of the non-fused connection fireproof cable joint, which comprises the following steps:
s1, assembling a first cable core and a second cable core to be connected in the copper sleeve in an interference fit mode, and then fixing the copper sleeve, the first cable core and the second cable core in a brazing and/or rivet connection mode to complete the butt joint of conductor cores of cable joints. The method comprises the following steps of firstly, polishing the butt joint surfaces of the ports of a first cable core and a second cable core to be connected to enable the two cable cores to be flat and can be completely butted and attached, then heating the copper sleeve in engine oil or butter to enable the inner diameter of the copper sleeve to be expanded, wherein the heating time is controlled to be within 5 minutes of the boiling time of the engine oil or butter so that the copper sleeve cannot be overheated to cause annealing, the original performance of the copper sleeve is not affected, if an emergency happens, the inner wall of the copper sleeve can be directly heated by open fire (such as oxygen acetylene), and the heating temperature is controlled to be within 100 ℃; inserting the assembly towards the two ends of the copper sleeve by the first cable core and the second cable core, overlapping the butt joint faces of the first cable core and the second cable core with the central line of the copper sleeve after the assembly is completed, accepting left and right deviation not greater than 1cm, completing interference fit of the copper sleeve and the first cable core and the second cable core after the copper sleeve is cooled, respectively brazing the joint of the first cable core and the second cable core at the two ends of the copper sleeve, and further positioning and reinforcing the copper sleeve and the first cable core and the second cable core through rivets.
S2, casting molten insulating materials at the copper sleeve, the first cable core and the second cable core which are finished in the step S1, and cooling to form an insulating layer wrapping the copper sleeve, the first cable core and the second cable core;
s3, wrapping waterproof adhesive tapes or waterproof plastic cloth on the outer portion of the insulating layer to form a waterproof layer; tinned copper wire cloth can be wrapped on the surface of the waterproof layer according to the protection requirement;
and S4, arranging an outer sheath on the waterproof layer, overlapping the outer sheath with the original cable outer sheaths of the first cable core and the second cable core by 50-200 mm, and winding the overlapping part by using an electric adhesive tape.
In step S2, the specific step of casting the insulating layer is: an outer jacket is arranged outside the copper sleeve, the first cable core and the second cable core, the outer jacket consists of an upper jacket and a lower jacket, the upper jacket and the lower jacket are detachably connected through screws, the upper jacket and the lower jacket are respectively formed by connecting an outer circular arc surface and an inner circular arc surface which are concentrically arranged through a connecting end surface, the upper jacket and the lower jacket form a casting space for casting the insulating layer when being butted, a casting opening communicated with the casting space is arranged on the upper jacket and/or the lower jacket, cooling cavities are formed inside the upper jacket and the lower jacket, a cooling oil outlet and a cooling oil inlet which are communicated with the cooling cavities are respectively arranged on the upper jacket and the lower jacket, the cooling oil inlet is sequentially connected with the condenser, the circulating oil pump, the cooling oil tank and the cooling oil outlet through pipelines to form a circulating cooling system; casting an insulating material in a molten state through the casting opening to wrap the copper sleeve, the first cable core and the second cable core; and then starting a circulating oil pump to accelerate cooling of the insulating material in the casting space, and detaching the outer jacket after the insulating material is cooled to normal temperature to form the insulating layer.
Furthermore, a temperature sensor can be arranged on the outer surface of the copper sleeve, the flow rate of cooling oil is known and determined according to the temperature of the temperature sensor, and a reasonable cooling speed is ensured, so that micro cracks and air holes of the insulating layer are avoided. Meanwhile, the temperature sensor can measure the temperature of the cable core, and the overtemperature alarm is realized in the later operation, so that the aim of fire prevention is fulfilled.
Furthermore, a plurality of radiating fins can be arranged on the outer surfaces of the upper clamping sleeve and the lower clamping sleeve, the outer diameter of each radiating fin is 1.5-2 times of the diameter of the casting space (namely the insulating layer), and the distance between every two adjacent radiating fins is 3-6 mm.
The invention has the beneficial effects that: the cable joint structure that non-melting of this design is connected adopts two cable joint of copper sheathing connection, insert two cable cores of treating to connect towards the copper sheathing both ends during the installation, rethread rivet location, it is fixed at the copper sheathing both ends brazing at last, high durability and convenient installation, need not to borrow special hot melt equipment, and the work efficiency is improved, in addition, still be provided with waterproof adhesive tape or waterproof plastic cloth at joint department around the waterproof layer that the package formed, set up wrinkle aluminium sheath and oversheath outside the waterproof layer, make cable joint structure have good waterproof and fireproof performance, mechanical protection, buffer protection to insulating layer and cable core, radial seal dampproofing and waterproofing, short-circuit current switches on during the trouble, advantages such as vertical blocking water under the unexpected condition. The invention also discloses a corresponding construction process, and the cooling system is adopted to accelerate the cooling of the insulating material and improve the working efficiency.
Drawings
FIG. 1 is a schematic view of the present invention in cross-section in overall configuration;
fig. 2 is a schematic structural view of the insulating layer cast in step S2 in the construction process of the present invention;
fig. 3 is a schematic cross-sectional view of the outer jacket structure in the insulating layer cast in step S2 in the construction process of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings. The copper sheathing in this embodiment also can adopt replacement such as silver cover or aluminium cover according to electric conductive property needs to the material of first cable core of cooperation and second cable core is suitable. Similarly, the rivet may be made of copper, silver, aluminum, or the like.
A non-fusion connection fireproof cable joint is shown in figure 1 and comprises a copper sleeve 2, an insulating layer 3, a shielding layer 4, a waterproof layer 5, a corrugated aluminum sheath 6 and an outer sheath 7, wherein two first cable cores 11 and two second cable cores 12 to be connected are installed in the copper sleeve 2, and the copper sleeve 2 is in interference fit with the first cable cores 11 and the second cable cores 12, so that the inner wall of the copper sleeve 2 is tightly attached to the outer walls of the first cable cores 11 and the second cable cores 12; insulating layer 3 parcel copper sheathing 2, first cable core 11 and second cable core 12, shielding layer 4, waterproof layer 5, wrinkle aluminium sheath 6 and oversheath 7 set gradually the skin of insulating layer 3. The insulating layer 3 is made of cross-linked polyethylene (XLPE), the cross-linked polyethylene is of a net structure after cross-linking, the structure has very strong deformation resistance even at high temperature, the cross-linked polyethylene has excellent electrical performance, the dielectric loss is smaller than that of polyvinyl chloride (PVC) insulation, and a cable made of the cross-linked polyethylene is easy to lay. The shielding layer 4 is shielded by a copper strip. The waterproof layer 5 is formed by wrapping waterproof adhesive tapes or waterproof plastic cloth, wherein the thickness of the waterproof layer is 0.2-2 mm, the waterproof layer is used for improving the waterproof effect and preventing short circuit from explosion, and the optimal thickness of the waterproof layer is 1 mm; the outer sheath 7 is made of polyethylene or polyvinyl chloride, and a corrugated aluminum sheath 6 is arranged between the waterproof layer 5 and the outer sheath 7.
Furthermore, two ends of the copper sleeve 2 are respectively fixed with the first cable core 11 and the second cable core 12 by brazing, and the area of a brazed part 21 is not less than 1cm2. For making the joint design more firm, copper sheathing 2 with still can fix a position and fix through a plurality of rivets 22 between first cable core 11 and the second cable core 12, wherein, rivet 22 is encircleing the copper sheathing is radial symmetric distribution, and every row of rivet 22 counts and is 3 ~ 6, and row number 4 ~ 8 rows, rivet 22's diameter is preferred 2 ~ 5 mm.
Further, the length of the copper sleeve 2 is set to be 5-10 times of the diameter of the first cable core 11 and the second cable core 12, and the thickness of the copper sleeve 2 is set to be 0.5-1 time of the diameter of the first cable core 11 and the second cable core 12.
Furthermore, the interference of the first cable core 11 and the second cable core 12 with the copper sheath 2 is 0-0.02 mm, preferably-0.005-0.013 mm, and the installation is convenient.
Further, the outer surface of the copper sleeve 2 can be provided with a temperature sensor 8, the working temperature of the copper sleeve 2 (especially the joint of the first cable core 11 and the second cable core 12) is monitored in real time, the safety of the cable is ensured, an alarm system can be connected, and if the working temperature exceeds the safety temperature, an alarm can be given, so that the fireproof purpose is achieved.
Based on the non-fused connection fireproof cable connector, the invention also discloses a construction process of the non-fused connection fireproof cable connector, as shown in fig. 2, the steps are as follows:
s1, firstly, polishing the butt joint surfaces of the ports of a first cable core 11 and a second cable core 12 to be connected to enable the two to be flat and can be completely butted and attached, then heating a copper sleeve 2 in engine oil or butter to enable the inner diameter of the copper sleeve 2 to be expanded, wherein the heating time is controlled to be less than 5 minutes when the engine oil or butter is boiled, so that the copper sleeve 2 cannot be overheated to cause annealing, the original performance of the copper sleeve is affected, if an emergency happens, the inner wall of the copper sleeve 2 can be directly heated by open fire (such as oxygen acetylene), and the heating temperature is controlled to be less than 100 ℃; then inserting and assembling the first cable core 11 and the second cable core 12 towards two ends of the copper sleeve 2; after the assembly, the butt joint surface of the first cable core 11 and the second cable core 12 is overlapped with the central line of the copper sleeve 2, the right and left deviation of not more than 1cm can be accepted, after the copper sleeve 2 is cooled, the copper sleeve 2 is assembled with the first cable core 11 and the second cable core 12 in an interference fit mode, the two ends of the copper sleeve 2 are respectively brazed at the joint of the first cable core 11 and the second cable core 12, and the copper sleeve 2 is further positioned and reinforced with the first cable core 11 and the second cable core 12 through the rivet 22 to complete the butt joint of conductor cores of cable joints.
S2, installing an outer jacket 9 outside the copper sleeve 2, the first cable core 11 and the second cable core 12, wherein as shown in FIG. 3, the outer jacket 9 is composed of an upper jacket 901 and a lower jacket 902, the upper jacket 901 and the lower jacket 902 are detachably connected through screws 903, the upper jacket 901 and the lower jacket 902 are respectively composed of an outer circular arc surface and an inner circular arc surface which are concentrically arranged through connection end surfaces, a casting space 904 for casting the insulating layer 3 is formed when the upper jacket 901 and the lower jacket 902 are butted, a plurality of radiating fins 93 are arranged on the outer surfaces of the upper jacket 901 and the lower jacket 902, the outer diameter of each radiating fin 93 is 1.5-2 times of the diameter of the casting space (namely the insulating layer), and the distance between every two adjacent radiating fins is 3-6 mm; a casting opening communicated with the casting space 904 is formed in the upper jacket 901 and/or the lower jacket 902, cooling cavities are formed in the upper jacket 901 and the lower jacket 902, a cooling oil outlet 92 and a cooling oil inlet 91 communicated with the cooling cavities are further formed in the upper jacket 901 and the lower jacket 902 respectively, and the cooling oil inlet 91 is connected with the condenser 103, the circulating oil pump 102, the cooling oil tank 101 and the cooling oil outlet 92 in sequence through pipelines to form a circulating cooling system; casting an insulating material in a molten state through the casting opening to wrap the copper sleeve 2, the first cable core 11 and the second cable core 12; then, the circulating oil pump 102 is started to accelerate cooling of the insulating material in the casting space, and after the insulating material is cooled to normal temperature to form the insulating layer 3, the outer jacket 9 is detached.
S3, wrapping waterproof adhesive tapes or waterproof plastic cloth outside the insulating layer 3, paying attention to uniform winding, overlapping 1/2 windings according to requirements to form a waterproof layer 5, wherein the thickness of the waterproof layer 5 is 0.2-2 mm; and then, winding tinned copper wire cloth on the surface of the waterproof layer 5 according to the protection requirement.
S4, respectively sleeving a corrugated aluminum sheath 6 and an outer sheath 7 outside the waterproof layer 5, wherein the outer sheath 7 needs to be lapped 50-200 mm with the original cable outer sheaths of the first cable core 11 and the second cable core 12, and the lapped parts are wound by using an electric adhesive tape.
The construction method adopts a non-melting connection mode to joint two cable cores to be connected, is convenient to install, does not need to borrow special hot melting equipment, improves the working efficiency, and improves the cooling efficiency of cable joint construction by arranging the outer jacket with the heat dissipation function and the cooling system consisting of the condenser, the oil tank and the circulating oil pump.
Furthermore, a temperature sensor 8 can be arranged on the outer surface of the copper sleeve 2, the flow rate of cooling oil is known and determined according to the temperature of the temperature sensor, and a reasonable cooling speed is ensured, so that micro cracks and air holes of the insulating layer are avoided. Meanwhile, the temperature sensor can measure the temperature of the cable core, and the overtemperature alarm is realized in the later operation, so that the aim of fire prevention is fulfilled.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made in the claims and the description of the present invention are within the scope of the present invention.
Claims (9)
1. The utility model provides a fire prevention cable joint is connected to non-melting, its characterized in that, including copper sheathing, insulating layer, waterproof layer and oversheath, two first cable cores and the second cable core of treating the connection of installation in the copper sheathing, the copper sheathing with adopt interference fit between first cable core and the second cable core, the insulating layer parcel copper sheathing, first cable core and second cable core, waterproof layer and oversheath set gradually the skin of insulating layer.
2. The non-fused fire-resistant cable joint according to claim 1, wherein the copper sheath is positioned and secured to the first cable core and the second cable core by rivets.
3. The non-fused connecting fireproof cable joint according to claim 1, wherein the two ends of the copper sheath are fixed to the first cable core and the second cable core by soldering.
4. A non-fusion splicing flameproof cable connector according to any of claims 1 to 3, wherein the copper sheath is replaced by a silver or aluminium sheath.
5. A non-fusion splicing flameproof cable connector according to any of claims 1 to 3, wherein the outer surface of the copper sheath is provided with a temperature sensor.
6. The non-fusion splicing flameproof cable coupling of claim 1, wherein the insulating layer is formed of cross-linked polyethylene and the outer jacket is formed of polyethylene or polyvinyl chloride.
7. The non-fused fire-resistant cable joint according to claim 1 or 6, wherein the waterproof layer is formed by wrapping waterproof adhesive tape or waterproof plastic cloth.
8. A process for constructing a non-fusion splicing fire-resistant cable splice, wherein a non-fusion splicing fire-resistant cable splice according to any one of claims 1 to 7 is performed by the steps of:
s1, assembling a first cable core and a second cable core to be connected in an interference fit manner in a copper sleeve, and fixing the copper sleeve, the first cable core and the second cable core in a brazing and/or rivet connection manner to complete butt joint of conductor cores of cable joints;
s2, casting molten insulating materials at the copper sleeve, the first cable core and the second cable core which are finished in the step S1, and cooling to form an insulating layer wrapping the copper sleeve, the first cable core and the second cable core;
s3, wrapping waterproof adhesive tapes or waterproof plastic cloth on the outer portion of the insulating layer to form a waterproof layer;
and S4, arranging an outer sheath on the waterproof layer, overlapping the outer sheath with the original cable outer sheaths of the first cable core and the second cable core by 50-200 mm, and winding the overlapping part by using an electric adhesive tape.
9. The construction process of the non-fusion splicing fireproof cable joint according to claim 8, wherein in step S2, the step of casting the insulating layer comprises:
an outer jacket is arranged outside the copper sleeve, the first cable core and the second cable core, the outer jacket consists of an upper jacket and a lower jacket, the upper jacket and the lower jacket are detachably connected through screws, a casting space for casting the insulating layer is formed when the upper jacket and the lower jacket are butted, a casting opening communicated with the casting space is formed in the upper jacket and/or the lower jacket, a cooling cavity is formed inside the upper jacket and the lower jacket, a plurality of cooling fins are arranged on the outer surfaces of the upper jacket and the lower jacket, a cooling oil outlet and a cooling oil inlet communicated with the cooling cavity are further formed in the upper jacket and the lower jacket respectively, and the cooling oil inlet is sequentially connected with a condenser, a circulating oil pump, a cooling oil tank and a cooling oil outlet through pipelines to form a circulating cooling system; casting an insulating material in a molten state through the casting opening to wrap the copper sleeve, the first cable core and the second cable core; and then starting a circulating oil pump to accelerate cooling of the insulating material in the casting space, and detaching the outer jacket after the insulating material is cooled to normal temperature to form the insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110412669.1A CN113224725A (en) | 2021-04-16 | 2021-04-16 | Non-fusion connection fireproof cable joint and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110412669.1A CN113224725A (en) | 2021-04-16 | 2021-04-16 | Non-fusion connection fireproof cable joint and construction process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113224725A true CN113224725A (en) | 2021-08-06 |
Family
ID=77087588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110412669.1A Pending CN113224725A (en) | 2021-04-16 | 2021-04-16 | Non-fusion connection fireproof cable joint and construction process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113224725A (en) |
-
2021
- 2021-04-16 CN CN202110412669.1A patent/CN113224725A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103208334B (en) | Connecting wire for new energy vehicle, and manufacturing method of connecting wire | |
| CN113224725A (en) | Non-fusion connection fireproof cable joint and construction process thereof | |
| CN112886327A (en) | Oxidation-resistant cable and preparation method thereof | |
| CN209516490U (en) | A kind of cross-inked polyethylene power cable breakdown reparation structure | |
| CN210608508U (en) | Special-shaped cable intermediate head for nuclear power station | |
| CN215733429U (en) | Non-fusion connection fireproof cable joint | |
| CN114649110A (en) | Preparation method of insulated cable with fireproof function | |
| CN213070715U (en) | High temperature resistant special cable | |
| CN114360805A (en) | High-temperature-resistant flame-retardant environment-friendly safe wire and cable and assembling method thereof | |
| CN215496138U (en) | Fire-resistant high temperature resistant composite cable | |
| CN113314914A (en) | Connecting method of non-fusion connected fireproof and explosion-proof cable joint | |
| CN111584137B (en) | Low-induction-voltage submarine cable and preparation method thereof | |
| CN105976920A (en) | Multi-core self-cooling high-strength optical fiber composite cable | |
| CN213878441U (en) | Cable welded joint structure | |
| CN220856945U (en) | Non-melting connection cable joint structure | |
| CN110729696A (en) | Strong grounding intermediate joint for submarine cable and installation method thereof | |
| CN111584125A (en) | Novel intelligent cooling type charging pile cable | |
| CN113471756A (en) | Non-fusion connection explosion-proof cable joint and construction process thereof | |
| CN210837272U (en) | Novel steel-tape-armored copper-core polyvinyl chloride power cable | |
| CN220439258U (en) | Polypropylene insulation medium-voltage fire-resistant environment-friendly cable | |
| CN218768857U (en) | Lightweight shielding liquid cooling charging cable | |
| CN216312085U (en) | Non-fusion connected cable joint with cooling function | |
| CN220139743U (en) | Aluminum foil heater with high temperature protection | |
| CN211907070U (en) | High-temperature-resistant cable | |
| CN215868698U (en) | Anti-aging wire and cable for building |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |