CN210608508U - Special-shaped cable intermediate head for nuclear power station - Google Patents
Special-shaped cable intermediate head for nuclear power station Download PDFInfo
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- CN210608508U CN210608508U CN201921657526.1U CN201921657526U CN210608508U CN 210608508 U CN210608508 U CN 210608508U CN 201921657526 U CN201921657526 U CN 201921657526U CN 210608508 U CN210608508 U CN 210608508U
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- binding post
- shrinkable
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Abstract
The utility model discloses a nuclear power station is with special-shaped cable intermediate head, it includes the right angle binding post that links to each other with the penetrating member lead rod, the right angle binding post that links to each other with the cable, double-walled heat shrinkage band, fire-retardant area, first double-walled heat shrinkage bush and the double-walled heat shrinkage bush of second, binding post and right angle binding post fixed connection, fire-retardant area is around the junction of package at binding post and right angle binding post, first double-walled heat shrinkage bush sets up on binding post tail pipe and penetrating member lead rod, the double-walled heat shrinkage bush of second sets up on right angle binding post tail pipe and cable insulation layer. The utility model provides a special-shaped cable intermediate head 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 utility model relates to a nuclear power station is with special-shaped cable intermediate head belongs to nuclear power station cable accessories field.
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.
SUMMERY OF THE UTILITY MODEL
The utility model 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 basis 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 problem, the technical scheme of the utility model is that:
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 a heat-shrinkable tape 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 a heat-shrinkable sleeve 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.
Having adopted above-mentioned technical scheme, the utility model discloses electrical connection adopts diplopore binding post and right angle diplopore binding post to fasten through the bolt, and the heat shrink area and the heat shrinkage bush that electrical insulation adopted are double-walled structure, and its profitable technological effect lies in:
1. the utility model adopts a double-hole wiring terminal and a right-angle double-hole wiring terminal, and the end surface of the double-hole wiring terminal is long enough, thus ensuring the through-flow 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 of the utility model solves the problems that the position of the fixing bolt is large and is irregular, and the 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 of the utility model can discharge air after heat shrinkage, and is tightly combined with a cable insulation 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 of the utility model is a halogen-free low-smoke flame-retardant glass fiber cloth belt for electrical insulation, has high electrical strength and strong tension, is easy to wrap and can not 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 utility model discloses a fastening bolt fixed connection binding post has effectively solved the inconvenient difficult problem of narrow and small space installation, and the bullet pad on the fastening bolt can effectively be solved because of the screw that binding post operation process expend with heat and contract with cold arouses is not hard up.
In addition, the utility model discloses heat shrink area and heat shrinkable sleeve are made by low smoke and zero halogen fire-retardant pyrocondensation material, and fire-retardant area is also for the electric insulation equally with the low smoke and zero halogen fire-retardant material, and the cooperation of three uses makes the electrical insulation performance and the fire behaviour of intermediate head further improve, satisfies the requirement of nuclear power station fire behaviour; 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 view of the special-shaped cable intermediate joint for a nuclear power station of 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 shrinkable sleeve of the present invention;
fig. 4 is a schematic structural diagram of the connection terminal and the right-angle connection terminal of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying 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, fire-retardant area 4 all is more than or equal to 50% around the package overlap rate, 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 a heat-shrinkable belt inner wall hot melt adhesive 1-2, wherein the outer wall heat-shrinkable belt 1-1 and the heat-shrinkable belt 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 setting, cutting according to different lengths and finally heating shrinkage 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 a heat-shrinkable sleeve inner-wall hot melt adhesive 2-2, the outer-wall heat-shrinkable sleeve 2-1 and the heat-shrinkable sleeve 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 molding, cutting according to different lengths, and finally heated and shrunk to.
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 above embodiments further describe the technical problems, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection 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 a heat-shrinkable tape 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 a heat-shrinkable sleeve 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 belt (1) and the flame retardant belt (4) is 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 |
|---|---|---|---|
| CN201921657526.1U CN210608508U (en) | 2019-09-30 | 2019-09-30 | Special-shaped cable intermediate head for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921657526.1U CN210608508U (en) | 2019-09-30 | 2019-09-30 | Special-shaped cable intermediate head for nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210608508U true CN210608508U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921657526.1U Active CN210608508U (en) | 2019-09-30 | 2019-09-30 | Special-shaped cable intermediate head for nuclear power station |
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| Country | Link |
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| CN (1) | CN210608508U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571751A (en) * | 2019-09-30 | 2019-12-13 | 江苏华侃核电器材科技有限公司 | Special-shaped cable intermediate head for nuclear power station |
| CN111697529A (en) * | 2020-06-17 | 2020-09-22 | 清远市电创电力工程安装有限公司 | Protective sleeve for drainage wire hanging piece |
-
2019
- 2019-09-30 CN CN201921657526.1U patent/CN210608508U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571751A (en) * | 2019-09-30 | 2019-12-13 | 江苏华侃核电器材科技有限公司 | Special-shaped cable intermediate head for nuclear power station |
| CN111697529A (en) * | 2020-06-17 | 2020-09-22 | 清远市电创电力工程安装有限公司 | Protective sleeve for drainage wire hanging piece |
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