CN110571751A - Special-shaped cable intermediate head for nuclear power station - Google Patents
Special-shaped cable intermediate head for nuclear power station Download PDFInfo
- Publication number
- CN110571751A CN110571751A CN201910942030.7A CN201910942030A CN110571751A CN 110571751 A CN110571751 A CN 110571751A CN 201910942030 A CN201910942030 A CN 201910942030A CN 110571751 A CN110571751 A CN 110571751A
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- double
- wall heat
- angle
- shrinkable
- terminal
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- 239000003063 flame retardant Substances 0.000 claims abstract description 25
- 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 claims abstract description 21
- 239000004831 Hot glue Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000010292 electrical insulation Methods 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000008602 contraction Effects 0.000 description 3
- 238000002788 crimping Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002654 heat shrinkable material Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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
- H02G15/1806—Heat shrinkable sleeves
Landscapes
- Cable Accessories (AREA)
Abstract
The invention discloses a special-shaped cable intermediate joint for a nuclear power station, which comprises a connecting terminal connected with a through part outgoing line rod, a right-angle connecting terminal connected with a cable, a double-wall heat-shrinkable tape, a flame-retardant tape, a first double-wall heat-shrinkable sleeve and a second double-wall heat-shrinkable sleeve, wherein the connecting terminal is fixedly connected with the right-angle connecting terminal, the flame-retardant tape is wrapped at the connecting part of the connecting terminal and the right-angle connecting terminal, the first double-wall heat-shrinkable sleeve is arranged on a connecting terminal tail pipe and the through part outgoing line rod, and the second double-wall heat-shrinkable sleeve is arranged on the right-angle connecting terminal tail pipe and a. The invention provides a special-shaped cable intermediate joint for a nuclear power station, which has longer service life under the working conditions of conductor temperature of 90 ℃, design basis accident, abnormal environment accident and serious accident; the high-voltage power supply has the advantages of simple structure, convenience and quickness in installation, flexibility in direction, strong sealing property, good electrical insulation property, strong nuclear radiation resistance and convenience in maintenance.
Description
Technical Field
The invention relates to a special-shaped cable intermediate joint for a nuclear power station, and belongs to the field of cable accessories of the nuclear power station.
Background
At present, China proposes to continue to promote the large-scale development of non-fossil energy, plan and build a batch of important hydropower and nuclear power projects, and steadily develop renewable energy sources such as wind power, solar energy and the like. The cable intermediate joint of the nuclear power station is used for connecting cables, penetrating pieces, cables and other electrical equipment, plays roles in recovering cable structures, re-insulating, sealing protection and the like, and is indispensable main auxiliary equipment of the nuclear power station. The use environment is harsh, the performance requirement of the nuclear environment is high, and the manufacturing technology is difficult. In order to ensure the transmission of signals of power supply, control, protection, nuclear measurement, illumination, instruments, communication and the like of electrical equipment in the containment vessel, a cable is required to penetrate through the special airtight containment vessel and is connected with the electrical equipment in an electrical penetration piece in a mode of an intermediate joint. Due to space limitation, the size of the penetrating piece terminal box is very small, and the intermediate joint is required to be installed inside the terminal; the common "straight" intermediate joint has not been available. Therefore, an intermediate joint which is small in structural size, convenient and fast to install, stable and reliable in electrical insulation performance and performance indexes meeting the use requirements of the CAP1400 nuclear power station nuclear environment is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem that the defects of the prior art are overcome, and the special-shaped cable intermediate joint for the nuclear power station has longer service life under the conditions that the conductor temperature is 90 ℃, the design reference accident condition, the abnormal environment accident condition and the serious accident condition; the high-voltage power supply has the advantages of simple structure, convenience and quickness in installation, flexibility in direction, strong sealing property, good electrical insulation property, strong nuclear radiation resistance and convenience in maintenance.
In order to solve the technical problems, the technical scheme of the invention is as follows:
The special-shaped cable intermediate joint for the nuclear power station comprises a connecting terminal connected with a wire outgoing rod of a penetrating piece, a right-angle connecting terminal connected with a cable, a double-wall heat-shrinkable band, a flame-retardant band, a first double-wall heat-shrinkable sleeve and a second double-wall heat-shrinkable sleeve, wherein the connecting terminal is fixedly connected with the right-angle connecting terminal, the flame-retardant band is wrapped at the connecting position of the connecting terminal and the right-angle connecting terminal, the first double-wall heat-shrinkable sleeve is arranged on a tail pipe of the connecting terminal and the wire outgoing rod of the penetrating piece, the second double-wall heat-shrinkable sleeve is arranged on the tail pipe of the right-angle connecting terminal and a cable insulating layer, and the double-wall heat-shrinkable band is wrapped on the.
Furthermore, the terminal end face of the wiring terminal is fixedly connected with the end face of the right-angle wiring terminal through a pair of fastening bolts, and the flame-retardant belt is wrapped on the terminal end face of the wiring terminal, the fastening bolts and the end face of the right-angle wiring terminal.
Furthermore, it has first circular port and first waist shape hole to open on the binding post terminal surface, the center in first circular port and first waist shape hole is located an axis, it has the second waist shape hole corresponding with first circular port, the second circular port corresponding with first waist shape hole to open on the right angle binding post terminal surface, one fastening bolt passes first circular port and second waist shape hole and fixes binding post and right angle binding post, another fastening bolt passes first waist shape hole and second circular port and fixes binding post and right angle binding post.
Further, the double-wall heat-shrinkable tape comprises an outer-wall heat-shrinkable tape and an inner-wall hot melt adhesive.
Further, the first double-wall heat-shrinkable sleeve and the second double-wall heat-shrinkable sleeve have the same structure, and the first double-wall heat-shrinkable sleeve comprises an outer wall heat-shrinkable sleeve and an inner wall hot melt adhesive.
Further, the lapping overlapping rate of the double-wall heat shrinkable tape and the flame retardant tape is more than or equal to 50%.
furthermore, the included angle between the end surface of the right-angle terminal and the tail pipe of the right-angle terminal is 90 degrees.
By adopting the technical scheme, the electrical connection adopts the double-hole wiring terminal and the right-angle double-hole wiring terminal to be fastened through the bolt, the thermal shrinkage tape and the thermal shrinkage bush which are adopted by the electrical insulation are both of double-wall structures, and the electric insulation structure has the beneficial technical effects that:
1. The electrical connection of the invention adopts the double-hole wiring terminal and the right-angle double-hole wiring terminal, and the end surface of the double-hole wiring terminal is long enough, thus ensuring the through-current capacity of the intermediate joint; the crimping direction can be changed at will according to the actual situation on site, so that the direction of the incoming cable is changed, and great convenience is brought to the construction in a narrow space on site; the circular hole and the waist-shaped hole are matched, so that the problem that the two holes cannot be completely aligned due to a compression error can be perfectly solved; two wiring terminals are fixed by bolts, so that construction in narrow space is facilitated.
2. The double-wall heat shrinkable belt solves the problems that the position of a fixing bolt is large and is special-shaped, and a heat shrinkable sleeve with normal multiplying power cannot be installed and sealed; the installation of the heat shrinkable tape is not limited by the shape and the size, and is particularly convenient for the re-insulation and the sealing of special-shaped pieces; the hot melt adhesive on the inner wall strengthens the sealing of the heat shrinkable tape, and simultaneously can buffer mechanical strain and resist high temperature and low temperature; the electric insulation performance is excellent, and fire behaviour is good, and it is convenient to maintain, and can effectually prevent the invasion of moisture, prolongs its life.
3. The double-wall heat-shrinkable sleeve can exhaust air after heat shrinkage and is tightly combined with a cable insulating layer, a cable jacket, a penetrating piece outgoing line rod and a wiring terminal tail pipe, and the inner wall hot melt adhesive can buffer mechanical strain; the problem that the gap between the heat-shrinkable sleeve and the contact medium cannot be sealed due to expansion caused by heat and contraction caused by cold is solved; the high-temperature-resistant and low-temperature-resistant cable has excellent high-temperature resistance and low-temperature resistance, good electrical insulation performance and good flame retardant performance, can effectively prevent the invasion of moisture and moisture, and prolongs the service life of the cable.
4. The flame-retardant belt wrapped on the fastening bolt is a halogen-free low-smoke flame-retardant glass fiber cloth belt for electrical insulation, has high electrical strength and extremely strong tensile force, is easy to wrap and cannot be broken; the thermal contraction belt has an electrical insulation function, and can be protected from being punctured by bolts; further improving the electrical insulation and flame retardancy of the intermediate joint.
5. The fastening bolt is adopted to fixedly connect the wiring terminal, the problem of inconvenient installation in a narrow space is effectively solved, and the elastic pad on the fastening bolt can effectively solve the problem of screw looseness caused by expansion with heat and contraction with cold in the operation process of the wiring terminal.
In addition, the heat shrinkable tape and the heat shrinkable sleeve are both made of low-smoke halogen-free flame-retardant heat shrinkable materials, and the flame-retardant tape is also a halogen-free low-smoke flame-retardant material for electrical insulation, so that the electrical insulating property and the flame retardant property of the intermediate joint are further improved by the cooperation of the three materials, and the requirement of the flame retardant property of the nuclear power station is met; the heat shrinkable belt and the heat shrinkable sleeve are both of double-wall structures, have strong sealing performance and solve the problem that the LOCA test and the immersion test cannot be passed.
Drawings
FIG. 1 is a schematic structural diagram of a special-shaped cable intermediate joint for a nuclear power station according to the present invention;
FIG. 2 is a schematic view of a double-walled heat shrinkable tape of the present invention;
FIG. 3 is a schematic view of a first double-walled heat shrink sleeve of the present invention;
Fig. 4 is a schematic structural view of the terminal and the right-angle terminal of the present invention.
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 4, a special-shaped cable intermediate joint for a nuclear power station comprises a connecting terminal 3 connected with a through part outgoing line rod 8, a right-angle connecting terminal 6 connected with a cable 9, a double-wall heat-shrinkable tube 1, a flame-retardant band 4, a first double-wall heat-shrinkable tube 2 and a second double-wall heat-shrinkable tube 7, wherein the connecting terminal 3 is fixedly connected with the right-angle connecting terminal 6, the flame-retardant band 4 is wrapped at the connecting position of the connecting terminal 3 and the right-angle connecting terminal 6, the first double-wall heat-shrinkable tube 2 is sleeved on a tail pipe of the connecting terminal 3 and the through part outgoing line rod 8, the second double-wall heat-shrinkable tube 7 is sleeved on a tail pipe of the right-angle connecting terminal 6 and an insulating layer of the cable 9 and is overlapped with an outer sheath of the cable 9, the double-wall heat-shrinkable tube 1 is wrapped on the first double-wall heat-shrinkable tube, the lapping sealing effect is good.
As shown in fig. 1 and 4, the end face of the terminal 3 and the end face of the right-angle terminal 6 are fixedly connected by a pair of fastening bolts 5, the end face of the terminal 3 and the end face of the right-angle terminal 6 are both fixed by crimping, and the directions of the two end faces are consistent during crimping. Fire-retardant area 4 is around the package on 3 terminal surfaces of binding post, fastening bolt 5 and 6 terminal surfaces of right angle binding post, and fire-retardant area 4 is the electrical insulation with there being not steamed low cigarette flame retardant glass fiber strap, 4 of fire-retardant area all are more than or equal to 50% around the package overlap ratio, around the package sealed effectual.
As shown in fig. 1 and 4, a first circular hole 3-1 and a first kidney-shaped hole 3-2 are formed in the end face of the terminal block 3, the centers of the first circular hole 3-1 and the first kidney-shaped hole 3-2 are located on one axis, a second kidney-shaped hole 6-1 corresponding to the first circular hole 3-1 and a second circular hole 6-2 corresponding to the first kidney-shaped hole 3-2 are formed in the end face of the right-angle terminal 6, one fastening bolt 5 penetrates through the first circular hole 3-1 and the second kidney-shaped hole 6-1 to fix the terminal block 3 and the right-angle terminal 6, and the other fastening bolt 5 penetrates through the first kidney-shaped hole 3-2 and the second circular hole 6-2 to fix the terminal block 3 and the right-angle terminal 6.
As shown in figure 2, the double-wall heat-shrinkable belt 1 comprises an outer wall heat-shrinkable belt 1-1 and an inner wall hot melt adhesive 1-2, wherein the outer wall heat-shrinkable belt 1-1 and the inner wall hot melt adhesive 1-2 are extruded into a belt shape by an extruder in a co-extrusion mode at one time, and the belt shape is subjected to irradiation crosslinking, stretching and shaping, cutting according to different lengths and finally heating and shrinking to corresponding positions.
As shown in fig. 3, the first double-wall heat-shrinkable sleeve 2 and the second double-wall heat-shrinkable sleeve 7 have the same structure, the first double-wall heat-shrinkable sleeve 2 comprises an outer-wall heat-shrinkable sleeve 2-1 and an inner-wall hot melt adhesive 2-2, the outer-wall heat-shrinkable sleeve 2-1 and the inner-wall hot melt adhesive 2-2 are extruded into a tubular shape by an extruder in a co-extrusion manner at one time, and the tubular shape is subjected to irradiation crosslinking, expansion sizing, cutting according to different lengths, and finally heating and shrinking to corresponding positions.
As shown in FIG. 4, the end face of the right-angle terminal 6 and the tail pipe of the right-angle terminal 6 form an included angle of 90 °
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 (7)
1. The utility model provides a nuclear power station is with special-shaped cable intermediate head which characterized in that: it comprises a wiring terminal (3) connected with a through part outgoing line rod (8), a right-angle wiring terminal (6) connected with a cable (9), a double-wall heat-shrinkable tape (1), a flame-retardant tape (4), a first double-wall heat-shrinkable sleeve (2) and a second double-wall heat-shrinkable sleeve (7), the connecting terminal (3) is fixedly connected with the right-angle connecting terminal (6), the flame-retardant belt (4) is wrapped at the connecting part of the connecting terminal (3) and the right-angle connecting terminal (6), the first double-wall heat-shrinkable sleeve (2) is arranged on a tail pipe of the wiring terminal (3) and a wire outlet rod (8) of the penetrating piece, the second double-wall heat-shrinkable sleeve (7) is arranged on a tail pipe of the right-angle wiring terminal (6) and an insulating layer of the cable (9), the double-wall heat-shrinkable belt (1) is wrapped on the first double-wall heat-shrinkable sleeve (2), the flame-retardant belt (4) and the second double-wall heat-shrinkable sleeve (7).
2. the special-shaped cable intermediate joint for nuclear power station as claimed in claim 1, characterized in that: binding post (3) terminal surface and right angle binding post (6) terminal surface pass through a pair of fastening bolt (5) fixed connection, fire-retardant area (4) are around the package on binding post (3) terminal surface, fastening bolt (5) and right angle binding post (6) terminal surface.
3. the special-shaped cable intermediate joint for nuclear power station as claimed in claim 2, characterized in that: a first round hole (3-1) and a first waist-shaped hole (3-2) are formed on the end surface of the wiring terminal (3), the centers of the first round hole (3-1) and the first kidney-shaped hole (3-2) are positioned on one axis, a second waist-shaped hole (6-1) corresponding to the first circular hole (3-1) and a second circular hole (6-2) corresponding to the first waist-shaped hole (3-2) are formed in the end face of the right-angle wiring terminal (6), one fastening bolt (5) penetrates through the first circular hole (3-1) and the second waist-shaped hole (6-1) to fix the wiring terminal (3) and the right-angle wiring terminal (6), and the other fastening bolt (5) penetrates through the first waist-shaped hole (3-2) and the second circular hole (6-2) to fixedly connect the wiring terminal (3) and the right-angle wiring terminal (6).
4. The special-shaped cable intermediate joint for nuclear power station as claimed in claim 1, characterized in that: the double-wall heat-shrinkable tape (1) comprises an outer wall heat-shrinkable tape (1-1) and an inner wall hot melt adhesive (1-2).
5. The special-shaped cable intermediate joint for nuclear power station as claimed in claim 1, characterized in that: the first double-wall heat-shrinkable sleeve (2) and the second double-wall heat-shrinkable sleeve (7) are identical in structure, and the first double-wall heat-shrinkable sleeve (2) comprises an outer wall heat-shrinkable sleeve (2-1) and an inner wall hot melt adhesive (2-2).
6. The special-shaped cable intermediate joint for nuclear power station as claimed in claim 1, characterized in that: the lapping overlapping rate of the double-wall heat shrinkable tape (1) and the lapping overlapping rate of the flame retardant tape (4) are both more than or equal to 50 percent.
7. The special-shaped cable intermediate joint for nuclear power station as claimed in claim 1, characterized in that: the included angle between the end face of the right-angle wiring terminal (6) and the tail pipe of the right-angle wiring terminal (6) is 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942030.7A CN110571751B (en) | 2019-09-30 | 2019-09-30 | Special-shaped cable intermediate joint for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942030.7A CN110571751B (en) | 2019-09-30 | 2019-09-30 | Special-shaped cable intermediate joint for nuclear power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110571751A true CN110571751A (en) | 2019-12-13 |
| CN110571751B CN110571751B (en) | 2024-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910942030.7A Active CN110571751B (en) | 2019-09-30 | 2019-09-30 | Special-shaped cable intermediate joint for nuclear power station |
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| Country | Link |
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| CN (1) | CN110571751B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284980A (en) * | 2021-12-28 | 2022-04-05 | 沙雨亭 | Cable head fastening device for cable laying |
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2019
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|---|---|---|---|---|
| GB1353752A (en) * | 1971-03-10 | 1974-05-22 | Santon Ltd | Encapsulation of electrical connections |
| EP0552082A1 (en) * | 1992-01-15 | 1993-07-21 | Euromold | Protection for medium voltage cable termination |
| US5267869A (en) * | 1992-12-14 | 1993-12-07 | General Motors Corporation | Ignition cable assembly and method of making same |
| KR200219118Y1 (en) * | 2000-10-25 | 2001-04-02 | 한국전력공사 | Multi-connector for low voltage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284980A (en) * | 2021-12-28 | 2022-04-05 | 沙雨亭 | Cable head fastening device for cable laying |
| CN114284980B (en) * | 2021-12-28 | 2024-05-24 | 北京城建二建设工程有限公司 | Cable head fastening device for cable laying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110571751B (en) | 2024-09-20 |
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