CN110676797A - Medium-voltage power cable terminal for high-temperature gas cooled reactor nuclear power station - Google Patents
Medium-voltage power cable terminal for high-temperature gas cooled reactor nuclear power station Download PDFInfo
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- CN110676797A CN110676797A CN201910943774.0A CN201910943774A CN110676797A CN 110676797 A CN110676797 A CN 110676797A CN 201910943774 A CN201910943774 A CN 201910943774A CN 110676797 A CN110676797 A CN 110676797A
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- 238000009413 insulation Methods 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 230000002708 enhancing effect Effects 0.000 claims abstract description 4
- 239000004831 Hot glue Substances 0.000 claims description 43
- 239000003292 glue Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 36
- 239000000463 material Substances 0.000 description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 5
- 239000002654 heat shrinkable material Substances 0.000 description 5
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- 238000004132 cross linking Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000005251 gamma ray Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
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- 238000005520 cutting process Methods 0.000 description 2
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Images
Classifications
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- 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
- H02G15/02—Cable terminations
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- 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
- H02G15/02—Cable terminations
- H02G15/04—Cable-end sealings
- H02G15/043—Cable-end sealings with end caps, e.g. sleeve closed at one end
- H02G15/046—Cable-end sealings with end caps, e.g. sleeve closed at one end with bores or protruding portions allowing passage of cable conductors
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- 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
- H02G15/1806—Heat shrinkable sleeves
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- 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
- H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
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- Cable Accessories (AREA)
Abstract
The invention discloses a medium-voltage power cable terminal for a high-temperature gas cooled reactor nuclear power station, which comprises a phase color pipe, a double-wall sealing pipe, double-wall branch gloves, a wiring terminal connected with each phase cable conductor and a double-wall insulating pipe used for enhancing the insulation of cables, wherein the phase color pipe is arranged outside the sealing pipe and used for identifying the phase of the cables, the double-wall sealing pipe is arranged at the tail pipe of the wiring terminal and is overlapped with the upper end part of the double-wall insulating pipe, and the lower end part of the double-wall insulating pipe is overlapped with finger pipes of the double-wall branch gloves. The invention provides a medium-voltage power cable terminal for a high-temperature gas cooled reactor nuclear power station, which has the service life of more than 60 years under the working conditions that the working temperature of a conductor is 90 ℃, the accumulated radiation dose of gamma rays is 550kGy and the relative humidity of the use environment is 100 percent, and has the advantages of good insulating property, low local discharge level, simple structure, convenience in installation, strong sealing property, long service life, good stability, small local discharge amount and the like.
Description
Technical Field
The invention relates to a medium-voltage power cable terminal for a high-temperature gas cooled reactor nuclear power station, and belongs to the technical field of cable accessories of nuclear power stations.
Background
The terminal of the medium voltage cable power cable for the nuclear power station is arranged at the head end and the tail end of the medium voltage cable, so that the cable accessory for realizing the permanent connection and the re-insulation of the medium voltage cable and electrical equipment is an indispensable main auxiliary equipment for the nuclear power station. The cable accessory has harsh use environment and strict safety requirement, and is a cable accessory with high performance level requirement and large manufacturing technical difficulty. At present, the maximum gamma ray irradiation resistant dose of a medium-voltage cable accessory for a nuclear power station is only 275kGy, which is only half of the gamma ray irradiation of 550kGy required by a high-temperature gas-cooled reactor nuclear power station, and the use requirement of the high-temperature gas-cooled reactor nuclear power station cannot be met at all. In addition, the medium-voltage cable terminal used in the conventional nuclear power station is easy to have water inflow in long-term operation under the condition that the relative humidity of the use environment is 100%, so that faults are generated, the electrical insulation performance is rapidly reduced and the partial discharge capacity is increased under the combined action of long-term irradiation aging, thermal aging and electrical aging, and hidden troubles are brought to the normal operation of the whole system. Therefore, a medium-voltage cable terminal with performance indexes meeting the use requirement of the nuclear environment of the high-temperature gas-cooled reactor nuclear power station and stable and reliable electrical insulation performance is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a medium-voltage power cable terminal for a high-temperature gas-cooled reactor nuclear power station, which has the service life of more than 60 years under the working conditions that the conductor working temperature is 90 ℃, the gamma ray accumulated irradiation dose is 550kGy and the relative humidity of the use environment is 100 percent, and has the advantages of good insulating property, low local discharge level, simple structure, convenient installation, strong sealing property, long service life, good stability, small local discharge amount and the like.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a medium-voltage power cable terminal for a high-temperature gas cooled reactor nuclear power station comprises a double-wall sealing pipe, double-wall branch gloves, a wiring terminal connected with each phase of cable conductor and a double-wall insulating pipe used for enhancing the insulation of the cable, wherein the double-wall sealing pipe is arranged at a tail pipe of the wiring terminal and is overlapped with the upper end of the double-wall insulating pipe, and the lower end of the double-wall insulating pipe is overlapped with a finger pipe of the double-wall branch gloves.
Further, the double-wall sealing pipe comprises a sealing pipe outer wall heat-shrinkable pipe and a sealing pipe inner wall hot melt adhesive.
Furthermore, a first hot melt adhesive tape is wound around the tail end of the terminal tail pipe and the gap of the cable insulation fracture.
Furthermore, a high-dielectric constant stress pipe is arranged at the insulation shielding fracture of each phase of cable, the high-dielectric constant stress pipe is respectively overlapped with the insulation shielding and the metal shielding at the lower end of the high-dielectric constant stress pipe, and the double-wall insulation pipe is arranged outside the cable insulation layer and the high-dielectric constant stress pipe.
Further, the double-wall insulating pipe comprises an insulating pipe outer wall heat-shrinkable pipe and an insulating pipe inner wall hot melt adhesive.
Furthermore, the first stress evacuation glue is positioned at the upper end part of the high-dielectric-constant stress pipe, so that the high-dielectric-constant stress pipe and the cable insulating layer form smooth transition.
And furthermore, a second stress evacuation glue is wound at the insulation shielding fracture of each phase of cable, and is respectively covered by 10-15 mm with the insulation shielding and the cable insulation layer of the cable to form smooth transition.
Further, a double-wall branch glove is arranged at the position of the break of the outer sheath of the cable, the double-wall branch glove comprises a finger tube and a tail tube, the finger tube of the double-wall branch glove is overlapped with the metal shielding of each phase of the cable, the tail tube of the double-wall branch glove is overlapped with the outer sheath of the cable, and the finger tube (12-3) and the tail tube (12-4) are both composed of a branch glove outer wall heat-shrinkable tube (12-1) and a branch glove inner wall hot melt adhesive (12-2).
Further, the medium-voltage power cable terminal for the high-temperature gas cooled reactor nuclear power station comprises a grounding wire and a constant-force spring, the grounding wire is connected with a metal shield of the cable and is fixed on the metal shield of the cable through the constant-force spring, a grounding wire terminal is arranged at the tail end of the grounding wire, a double-wall heat-shrinkable sleeve is arranged outside the grounding wire, the lower end of the double-wall heat-shrinkable sleeve is lapped with a tail pipe of the grounding wire terminal, and second hot-melt adhesive tapes are wound at the fracture parts of the constant-force spring and a cable outer sheath.
Further, the double-wall heat-shrinkable tube comprises an outer-wall heat-shrinkable tube and an inner-wall hot melt adhesive.
After the technical scheme is adopted, the key parts of the insulating tube and the branch gloves are improved into a double-wall structure, the stress tube is adopted for electric stress control, the stress tube with high dielectric constant is adopted for stress evacuation and matched application, the gap part is wrapped by the hot melt adhesive tape, and the electric stress control device has the beneficial technical effects that:
1. the sealing tube, the insulating tube, the branch gloves and the heat-shrinkable sleeve are all of double-wall structures; the heated hot melt adhesive fills gaps at the contact positions, overcomes the defect that a heat shrinkage component cannot seal small gaps, and can effectively prevent moisture and water from invading; the service life of the device is prolonged.
2. The double-wall insulating pipe can exhaust air after thermal contraction and is tightly combined with the electric insulating layer, the high-dielectric constant stress pipe and the finger pipe of the branch glove, and the hot melt adhesive on the inner wall can buffer mechanical strain; the problem of surface-extending flashover caused by a gap formed between the cable insulation and the heat-shrinkable sleeve due to expansion with heat and contraction with cold is solved, so that the faults of a power system are reduced, and the service life of the power system is prolonged.
3. The electric stress control of the invention adopts the cooperation of the high dielectric constant stress tube and the stress dispersion glue: stress evacuation glue is wrapped at the fracture of the insulation shield, so that a gap between the stress tube and the fracture of the insulation shield is filled, the heating and even breakdown of the fracture position caused by partial discharge caused by air gaps are effectively reduced, and the mechanical strain can be buffered; stress evacuation glue is wrapped at the upper end of the stress tube, so that a gap between the thermal shrinkage insulating tube and the fracture of the stress tube is filled, an electric field is homogenized in an auxiliary manner, partial discharge is effectively reduced, and the insulating tube and the stress tube are bonded more closely. The high dielectric constant stress tube is matched with the stress dispersion glue for application, so that the electric field distribution is more uniform, and the local discharge capacity is lower; the electric insulation performance is better, the electric aging damage is lower, and the service life of the terminal is further prolonged.
4. According to the invention, the hot melt adhesive tape is wound around the gap between the wiring terminal and the insulation fracture, and the gap of the stranded conductor can be sealed after the hot melt adhesive tape is melted by heating, so that the double-wall insulation pipe is tightly combined with the wiring terminal, the cable conductor and the cable insulation layer; wrapping a hot melt adhesive tape on the surface of the constant force spring and at the fracture of the cable outer sheath, wherein the hot melt adhesive tape is heated and melted to enable the cable outer sheath to be better sealed with the cable cores and the branch gloves; the upper end and the lower end of the cable terminal are completely sealed, the influence of the moist environment of a nuclear power plant is avoided, and the fault probability of a power system is greatly reduced.
5. The double-wall heat-shrinkable sleeve is arranged outside the grounding wire and covers the tail pipe of the terminal of the grounding wire, so that moisture can be effectively prevented from invading from a copper-woven ground wire gap and the connecting position of the terminal of the grounding wire and the grounding wire, and meanwhile, the phenomenon that the contact part of the grounding wire and the copper shield of the cable is oxidized due to invasion of moisture to cause poor grounding and reduce the through-current capacity so as to cause faults can be avoided.
In addition, the insulating pipe adopts a double-wall structure, the bending performance of the terminal is better, and the insulating pipe cannot be separated from the cable insulating layer after being bent due to the hot melt adhesive serving as a buffer layer; therefore, the terminal flashover and breakdown faults caused by bending of the installation are avoided, and the safety of the whole power system is ensured.
Drawings
Fig. 1 is a schematic structural view of a medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to the present invention;
FIG. 2 is a schematic structural view of a double-walled sealed pipe of the present invention;
FIG. 3 is a schematic structural view of a double-walled insulated pipe of the present invention;
FIG. 4 is a schematic structural view of a double-walled glove of the present invention;
FIG. 5 is a schematic view showing the structure of a double-walled heat shrinkable tube according to the present invention;
FIG. 6 is a perspective view of a double-walled glove of the present invention;
fig. 7 is an enlarged view of a portion a of fig. 1.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 7, a medium-voltage power cable terminal for a high-temperature gas cooled reactor nuclear power station comprises a double-wall sealing pipe 2, double-wall branch gloves 12, a connecting terminal 1 connected with each phase of cable conductor, and a double-wall insulating pipe 5 used for enhancing the insulation of the cable, wherein the double-wall sealing pipe 2 is sleeved at a tail pipe of the connecting terminal 1 and is overlapped with the upper end part of the double-wall insulating pipe 5, and the lower end part of the double-wall insulating pipe 5 is overlapped with finger pipes of the double-wall branch gloves 12. The cable in the embodiment is a three-phase cable, the wiring terminal 1 meets the requirement of GB/T14315 in size, and is made of copper T3 No. III No. GB/T5231, a sealed DTM type and tinning.
As shown in fig. 1 and 2, the double-wall sealing tube 2 comprises a sealing tube outer wall heat-shrinkable tube (2-1) and a sealing tube inner wall hot melt adhesive (2-2), the outer wall heat-shrinkable tube (2-1) is a low-smoke halogen-free flame-retardant heat-shrinkable material, and the sealing tube inner wall hot melt adhesive (2-2) is a hot melt adhesive material with a softening point above 180 ℃.
As shown in fig. 1, a first hot melt adhesive tape 3 is wrapped around the tail end of the tail pipe of the connection terminal 1 and the gap between the tail pipe and the insulation fracture, and the first hot melt adhesive tape 3 is a hot melt adhesive tape with a softening point of more than 180 ℃.
As shown in fig. 1, a high-k stress tube 7 is sleeved at an insulation shielding fracture of each phase cable, the high-k stress tube 7 is respectively overlapped with an insulation shield 16 and a metal shield 17 of the cable at the lower end of the high-k stress tube 7, a double-wall insulation tube (5) is sleeved outside the cable insulation layer 17 and the high-k stress tube 7, and the high-k stress tube 7 is made of a thermal shrinkage stress material with the dielectric constant larger than 20. The high dielectric constant stress tube 7 is extruded into a tube shape by an extruder, is irradiated, crosslinked, expanded and shaped, cut according to different lengths, and finally heated and contracted to a corresponding position.
As shown in fig. 1 and 3, the double-wall insulating tube (5) comprises an insulating tube outer wall heat-shrinkable tube (5-1) and an insulating tube inner wall hot melt adhesive (5-2), the insulating tube outer wall heat-shrinkable tube (5-1) is a low-smoke halogen-free flame-retardant heat-shrinkable material, and the insulating tube inner wall hot melt adhesive (5-2) is a hot melt adhesive material with a softening point above 180 ℃.
As shown in fig. 1, the first stress evacuation glue (6) is located at the upper end of the high-k stress pipe 7, so that the high-k stress pipe (7) and the cable insulation layer 17 form a smooth transition.
As shown in fig. 1, a second stress dispersion glue (8) is wrapped at the insulation shielding fracture of each phase of cable, and is respectively overlapped with a cable insulation shield 16 and a cable insulation layer 17 by about 10-15 mm to form a smooth transition.
As shown in fig. 1 and 4, a double-wall branch glove 12 is sleeved at a fracture of an outer sheath of the cable, the double-wall branch glove 12 comprises a finger tube 12-3 and a tail tube 12-4, the finger tube 12-3 of the double-wall branch glove 12 is overlapped with a metal shield 15 of each phase of cable, and the tail tube 12-4 of the double-wall branch glove 12 is overlapped with the outer sheath of the cable. The finger tube (12-3) and the tail tube (12-4) are both composed of a branch glove outer wall heat-shrinkable tube (12-1) and a branch glove inner wall hot melt adhesive (12-2), the outer wall (12-1) heat-shrinkable branch glove is made of a low-smoke halogen-free flame-retardant heat-shrinkable material, the branch glove inner wall hot melt adhesive (12-2) is made of a hot melt adhesive material with a softening point above 180 ℃, the branch glove outer wall heat-shrinkable tube (12-1) adopts an injection molding process, and is subjected to irradiation crosslinking, expansion and shaping, the branch glove inner wall hot melt adhesive (12-2) adopts a coating process, and finally is heated and shrunk to a corresponding part.
As shown in fig. 1 and 5, the cable comprises a ground wire, the ground wire is connected with a metal shield 15 of a three-phase cable, the ground wire 11 is fixed on the metal shield 15 of the cable by a constant force spring 10, a ground wire terminal 14 is arranged at the tail end of the ground wire 11, a double-wall heat-shrinkable tube 13 is arranged outside the ground wire 11, the lower end of the double-wall heat-shrinkable tube 13 is lapped with a tail pipe of the ground wire terminal 14, and second hot-melt adhesive tapes 9 are wound at the fracture parts of the constant force spring 10 and a cable outer sheath. The ground terminal 14 conforms to the requirement of GB/T14315 in size, is made of no less than GB/T5231 No. three copper T3, is in a sealed DTM type, and is plated with tin. The second hot melt adhesive tape 9 is a hot melt adhesive tape material with a softening point above 180 ℃, the double-wall heat-shrinkable tube 13 comprises an outer wall heat-shrinkable tube (13-1) and an inner wall hot melt adhesive (13-2), the outer wall heat-shrinkable tube (13-1) is a low-smoke halogen-free flame-retardant heat-shrinkable material, and the inner wall hot melt adhesive (13-2) is a hot melt adhesive material with a softening point above 180 ℃.
The first hot melt adhesive tape 3 and the second hot melt adhesive tape 9 are extruded into narrow strips by an extruder, are subjected to irradiation crosslinking, are cut according to different lengths, are wrapped on corresponding positions, and are finally heated and melted.
As shown in fig. 2, 3 and 5, the double-wall sealed pipe 2, the double-wall insulated pipe 5 and the double-wall heat-shrinkable tube 13 are all composed of an outer-wall heat-shrinkable tube and an inner-wall hot melt adhesive, the heat-shrinkable tube and the hot melt adhesive are extruded into a pipe shape by an extruder in a double-layer co-extrusion manner at one time, and the pipe shape is subjected to irradiation crosslinking, expansion setting, cutting according to different lengths and finally heating shrinkage to corresponding positions.
As shown in fig. 1, a phase color tube 4 is installed outside a double-wall sealing tube 2 and used as a phase identification of a three-phase cable, the phase color tube 4 is made of yellow, green and red low-smoke halogen-free flame-retardant heat-shrinkable material, the phase color tube 4 is extruded and molded by an extruder, is subjected to irradiation crosslinking, expansion molding, cutting according to different lengths, and is finally heated and shrunk to a corresponding position.
The technical problems, technical solutions and advantages of the present invention have been described in detail with reference to the above embodiments, and it should be understood that the above embodiments are merely exemplary and not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A medium-voltage power cable terminal for a high-temperature gas cooled reactor nuclear power station is characterized in that: the double-wall insulation cable comprises a double-wall sealing pipe (2), double-wall branch gloves (12), a wiring terminal (1) connected with each cable conductor and a double-wall insulation pipe (5) used for enhancing the insulation of the cable, wherein the double-wall sealing pipe (2) is arranged at a tail pipe of the wiring terminal (1) and is overlapped with the upper end part of the double-wall insulation pipe (5), and the lower end part of the double-wall insulation pipe (5) is overlapped with a finger pipe of the double-wall branch gloves (12).
2. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 1, wherein: the double-wall sealing pipe (2) comprises a sealing pipe outer wall heat-shrinkable pipe (2-1) and a sealing pipe inner wall hot melt adhesive (2-2).
3. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 1, wherein: and a first hot melt adhesive tape (3) is wound around the tail end of the tail pipe of the wiring terminal (1) and the gap position of the insulation fracture of the cable.
4. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 1, wherein: the cable comprises a high-dielectric constant stress pipe (7), wherein the high-dielectric constant stress pipe (7) is arranged at the fracture of an insulation shield (16) of each phase of cable, the high-dielectric constant stress pipe (7) is respectively overlapped with the insulation shield (16) and a metal shield (15) of the cable at the lower end of the high-dielectric constant stress pipe, and a double-wall insulation pipe (5) is arranged outside a cable insulation layer (17) and the high-dielectric constant stress pipe (7).
5. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 1, wherein: the double-wall insulating pipe (5) comprises an insulating pipe outer wall heat-shrinkable pipe (5-1) and an insulating pipe inner wall hot melt adhesive (5-2).
6. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 1, wherein: the upper end part of the high dielectric constant stress pipe (7) is provided with a first stress evacuating glue (6), so that the high dielectric constant stress pipe (7) and the cable insulation layer (17) form a smooth transition.
7. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 6, wherein: and the second stress evacuation glue (8) is wound at the fracture of the insulation shield (16) of the cable, and the second stress evacuation glue (8) is respectively covered with the insulation shield (16) of the cable and the cable insulation layer (17) to form smooth transition.
8. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 1, wherein: the double-wall branch gloves (12) are arranged at the fracture of the outer sheaths of the cables, the double-wall branch gloves (12) comprise finger tubes (12-3) and tail tubes (12-4), the finger tubes (12-3) of the double-wall branch gloves (12) are overlapped with metal shields (15) of the cables in each phase, the tail tubes (12-4) of the double-wall branch gloves (12) are overlapped with the outer sheaths of the cables, and the finger tubes (12-3) and the tail tubes (12-4) are both formed by branch glove outer wall heat shrink tubes (12-1) and branch glove inner wall hot melt adhesives (12-2).
9. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 8, wherein: including earth connection (11) and constant force spring (10), earth connection (11) are connected with the metallic shield (15) of each looks cable and fix earth connection (11) on metallic shield (15) of cable through constant force spring (10), the end of earth connection (11) is provided with earth connection terminal (14), earth connection (11) outside is provided with double-walled heat shrinkage bush (13), the lower extreme of double-walled heat shrinkage bush (13) and the tail pipe of earth connection terminal (14) overlap and cover, constant force spring (10) and cable jacket fracture department all around there is second hot melt adhesive tape (9).
10. The medium voltage power cable terminal for a high temperature gas cooled reactor nuclear power plant according to claim 9, wherein: the double-wall heat-shrinkable tube (13) comprises an outer wall heat-shrinkable tube (13-1) and an inner wall hot melt adhesive (13-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910943774.0A CN110676797A (en) | 2019-09-30 | 2019-09-30 | Medium-voltage power cable terminal for high-temperature gas cooled reactor nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910943774.0A CN110676797A (en) | 2019-09-30 | 2019-09-30 | Medium-voltage power cable terminal for high-temperature gas cooled reactor nuclear power station |
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| CN110676797A true CN110676797A (en) | 2020-01-10 |
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| CN201910943774.0A Pending CN110676797A (en) | 2019-09-30 | 2019-09-30 | Medium-voltage power cable terminal for high-temperature gas cooled reactor nuclear power station |
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| US6265663B1 (en) * | 1994-02-11 | 2001-07-24 | Pirelli Cavi S.P.A. | Terminal for an electric cable |
| CN201466655U (en) * | 2009-07-17 | 2010-05-12 | 保定合力达应用化学有限公司 | Thermal shrinkage cable terminal |
| CN206922409U (en) * | 2017-03-24 | 2018-01-23 | 深圳市惠程电气股份有限公司 | The buried separable connector of silicon rubber |
| CN210608492U (en) * | 2019-09-30 | 2020-05-22 | 江苏华侃核电器材科技有限公司 | Medium-voltage power cable terminal for high-temperature gas cooled reactor nuclear power station |
-
2019
- 2019-09-30 CN CN201910943774.0A patent/CN110676797A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6265663B1 (en) * | 1994-02-11 | 2001-07-24 | Pirelli Cavi S.P.A. | Terminal for an electric cable |
| CN2384351Y (en) * | 1999-06-23 | 2000-06-21 | 中国科学院长春应用化学研究所 | Thermal contraction and thermal melt composite double-wall pipe |
| CN201466655U (en) * | 2009-07-17 | 2010-05-12 | 保定合力达应用化学有限公司 | Thermal shrinkage cable terminal |
| CN206922409U (en) * | 2017-03-24 | 2018-01-23 | 深圳市惠程电气股份有限公司 | The buried separable connector of silicon rubber |
| CN210608492U (en) * | 2019-09-30 | 2020-05-22 | 江苏华侃核电器材科技有限公司 | Medium-voltage power cable terminal for high-temperature gas cooled reactor nuclear power station |
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