CN2179998Y - Nuclear safety grade instrument cable - Google Patents
Nuclear safety grade instrument cable Download PDFInfo
- Publication number
- CN2179998Y CN2179998Y CN 94227513 CN94227513U CN2179998Y CN 2179998 Y CN2179998 Y CN 2179998Y CN 94227513 CN94227513 CN 94227513 CN 94227513 U CN94227513 U CN 94227513U CN 2179998 Y CN2179998 Y CN 2179998Y
- Authority
- CN
- China
- Prior art keywords
- copper wire
- liner
- fire
- instrument cable
- inner lining
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a nuclear safety grade instrument cable, which belongs to the technical field of nuclear engineering. The utility model is characterized in that a tinning copper wire strand cable is provided with a fire lagging and an insulation layer, which form a core wire. Two core wires which are composed of a fire lagging and an insulation layer, are twisted together and form a pair. The external of each pair is provided with an inner lining, a tinning copper wire shielding and an inner lining then form a group. Each group or more than two groups are twisted together and the circumference are provided with a fire-proof stuffing, an inner lining, a fire-proof layer, an inner lining, a tinning copper wire shielding layer, a fire lagging and a sheathing then form a cable. The shielding performance of magnetic field and electric field is enhanced. The interference of common mode and series mode is solved. The utility model has normal working capacity under the operating condition of loss of coolant accident.
Description
The utility model relates to the nuclear power engineering field, is applied to the matching used radiotolerant nuclear safe level control instrument electric wire of automatic control system or electric equipment.
Present cable industry both domestic and external, for the fire incident that prevents nuclear power station and industrial installation takes place and spreads, only consider from the resist foeign element of extraneous fire ability of electric wire, the simple flame-proof material that adopts is made flame-retardant electric wire and cable, ignore the potential ignition energy of electric wire in the transmission of electric signals process, thereby can't stop because the fire that the inherent potential of control, instrument electric wire itself causes reduces the fire incident incidence effectively.In addition, interference performance is relatively poor mutually between anti-outside electromagnetic interference, electrostatic field and the anti-line of existing used in nuclear power station control, instrument electric wire, causes relatively difficulty of debugging.
The purpose of this utility model extraneous fire ability of can resisting, and electric wire limited additional energy storage in the transmission of electric signals process, the nuclear safe level of anti-irradiation that has low cigarette, low toxicity, the low radiotolerant Halogen of burn into and peel off a kind of (resistance) fire of sheath is fast controlled, instrument cable.
For finishing the technical scheme that above-mentioned purpose is taked: respectively fire lagging is set from inside to outside and insulating barrier is formed heart yearn by many tinned copper wire twisted wires, it is right to be twisted into by two heart yearns, and liner is set from inside to outside, it is one group that tinned copper wire shielding and liner are formed every pair, by one group or two groups or three groups to stranded more than 30 groups, around armour fill out fire prevention and fill and wrapped from inside to outside liner, fireprotection layer, liner, the tin plated steel wire screen, liner, fireprotection layer and sheath stranding, establish one of tin plated steel wire between above-mentioned fireprotection layer and the sheath, be used for peeling off fast sheath.
The utility model embodiment is described in detail in conjunction with the accompanying drawings.
Fig. 1 is the utility model structure chart.
The utility model is combined into a pair of with two heart yearns, every pair of outside is established liner, shielding and liner and formed one group, and the utility model can be by one group or two groups or three groups until stranded more than 30 groups, last stranding.Present embodiment is formed the cable form with two and is described in detail.As shown in Figure 1, the tinned copper wire twisted wire outwards is provided with fire lagging 2 and insulating barrier 3 composition heart yearns respectively for 1 li, it is right to be twisted into by two heart yearns, and liner 4, tinned copper wire shielding 5 and liner 6 are set from inside to outside form one group, can be stranded by two groups, around armour fill out fire prevention and fill 14, and wrapped from inside to outside total liner 7, fireprotection layer 8, liner 9, tin plated steel wire screen 10, liner 13, fireprotection layer 12 and sheath 11 strandings.Establish the tin plated steel wire 15 that to peel off sheath 11 fast between fireprotection layer 12 and the sheath 11.
The utility model is respectively to be more than 95% with the tin plated wire count of tinned copper wire screen 95% or more with the tin plated steel wire count of tin plated steel wire screen for strengthening magnetic field shielding performance and electric field shielding performance, adopt semiconductive shielding layer to solve common mode disturbances simultaneously, also multilayer is provided with fireprotection layer in addition, fire prevention is filled and insulating barrier, and integral body has the ability and the little ability of uneven electric capacity of operate as normal under the loss-of-coolant accident operating mode.
In the above embodiments, inner covering and armour are set between its fireprotection layer 12 and the sheath 11 can form armored control, instrument cable.
Claims (3)
1, (resistance) fiery anti-irradiation of a kind of, insulating barrier stranded by copper wire, shielding stranding, nuclear safe level control, instrument cable is characterized in that: a. tinned copper wire twisted wire (1) is provided with fire lagging (2) and insulating barrier (3) composition heart yearn from inside to outside respectively; B. it is right to be twisted into by two heart yearns, and liner (4), tinned copper wire screen (5) and liner (6) composition group are set from inside to outside; C. organize or organize more stranded armour all around and fill out fire prevention filling (14) and wrapped from inside to outside liner (7), fireprotection layer (8), liner (9), tin plated steel wire screen (10), liner (13), fireprotection layer (12) and sheath (11) stranding; D. establish the tin plated steel wire (15) that to peel off sheath (11) fast between fireprotection layer (12) and the sheath (11).
2, control according to claim 1, instrument cable is characterized in that tinned copper wire screen (5), and its copper wire count is more than 95%.
3, control according to claim 1 and 2, instrument cable is characterized in that tin plated steel wire screen (10), and its braided steel wire density is more than 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227513 CN2179998Y (en) | 1994-01-06 | 1994-01-06 | Nuclear safety grade instrument cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227513 CN2179998Y (en) | 1994-01-06 | 1994-01-06 | Nuclear safety grade instrument cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2179998Y true CN2179998Y (en) | 1994-10-19 |
Family
ID=33840244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94227513 Expired - Fee Related CN2179998Y (en) | 1994-01-06 | 1994-01-06 | Nuclear safety grade instrument cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2179998Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971813A (en) * | 2013-01-29 | 2014-08-06 | 安徽神州缆业集团有限公司 | Cable used for nuclear power station measurement |
-
1994
- 1994-01-06 CN CN 94227513 patent/CN2179998Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971813A (en) * | 2013-01-29 | 2014-08-06 | 安徽神州缆业集团有限公司 | Cable used for nuclear power station measurement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |