CN203376991U - Fire-hazard-preventing cable and protecting circuit preventing cable fire hazards - Google Patents
Fire-hazard-preventing cable and protecting circuit preventing cable fire hazards Download PDFInfo
- Publication number
- CN203376991U CN203376991U CN201220708943.6U CN201220708943U CN203376991U CN 203376991 U CN203376991 U CN 203376991U CN 201220708943 U CN201220708943 U CN 201220708943U CN 203376991 U CN203376991 U CN 203376991U
- Authority
- CN
- China
- Prior art keywords
- fire
- pin
- cable
- control line
- resistance
- 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
Links
Images
Landscapes
- Fire Alarms (AREA)
Abstract
The utility model relates to a fire-hazard-preventing cable and a protecting circuit preventing cable fire hazards, which can be suitably used in flammable and combustible places such as coal mines and chemical places and also suitably used in hotels, civil buildings, etc. for electric energy transmission. Temperature sensitive elements are arranged inside the fire-hazard-preventing cable. When the temperature inside the cable exceeds a set value, a power supply is cut off through the protecting circuit. Cable fire hazards are thus prevented from happening.
Description
Technical field
The utility model relates to a kind of fire-proof cable and prevents the protective circuit of cable fire, and it is applicable to the inflammable and explosive places such as mine, chemical industry, also is applicable to hotel and the building such as civilian place electric energy transmitting.
Background technology
In prior art; generally select flame retardant cable to prevent that cable fire from occurring; but often do not reach in actual applications its purpose; reason is that flame retardant cable is can not continue burning when there is no burning things which may cause a fire disaster; as long as there is burning things which may cause a fire disaster to burn away, ignition of cable is arc short-circuit often, and existing power supply protection does not often have the effect of protection to arc short-circuit; therefore, only utilize flame retardant cable not reach the purpose that prevents ignition of cable.In reality production and life, the fire disaster of ignition of cable is of common occurrence, and especially mine underground cable catches fire and easily causes gas, coal-dust explosion.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of fire-proof cable is provided and prevents the protective circuit of cable fire, to solve the deficiencies in the prior art
For achieving the above object; the utility model provides a kind of fire-proof cable; described fire-proof cable is to add the protection control line in existing cable; described protection control line is a plurality of temperature sensors to be connected in series to the line formed by plain conductor or conductive rubber, conductive plastics, and temperature sensor is bimetallic temperature sensor.
The invention also discloses the protective circuit for the fire-proof cable, the protective circuit of described fire-proof cable: by protection control line testing circuit, the switch trip drive circuit, constant-current supply and constant voltage source four parts form; Protection control line testing circuit: the input by test button SYAN, protection control line RX, resistance R 1 and photoelectrical coupler U forms.The switch trip drive circuit: by resistance R 2, R3, triode BG, relay coil J, diode D forms.Constant-current supply: for exporting constant current, be linear constant-current supply or non-linear constant-current supply.Constant voltage source: for exporting constant voltage, be linear constant voltage source or non-linear constant voltage source.
The input of test button SYAN, protection control line RX and photoelectrical coupler U is connected in series; the order be connected in series does not require; both can be connected in series with the input anode of photoelectrical coupler U; also can be connected in series with the input negative electrode of photoelectrical coupler U, can also connect test button SYAN, protection control line RX respectively respectively at two pins of photoelectrical coupler U input.
The beneficial effects of the utility model are: when the working temperature of cable surpasses the set point automatic cut-off power, cable fire is solved in rudiment, prevent the generation of cable fire.
The accompanying drawing explanation
For the ease of understanding structure of the present utility model and implementing best mode of the present utility model, below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is the utility model fire-proof construction of cable figure;
Fig. 2 is the protective circuit schematic diagram of the utility model fire-proof cable.
embodiment
In Fig. 1, plain conductor 2 is metallic conduction materials; protective earthing line 4 is metallic conduction materials; cable cover(ing) 3 is rubber, plastic insulation material; protection control line 1 is a plurality of temperature sensors to be connected in series to the line formed by plain conductor or conductive rubber, conductive plastics, and temperature sensor is bimetallic temperature sensor.
In Fig. 2, constant-current supply positive electricity output 1 is connected with the end of test button SYAN; the other end of test button SYAN is connected with protection control line RX mono-end; the other end of protection control line RX is connected with resistance R 1 one ends; the other end of resistance R 1 is connected with constant-current supply negative electricity output 2; input 1 pin of photoelectrical coupler U, 2 pin are in parallel with resistance R 1, foregoing circuit connected and composed protection control line testing circuit.Output 3 pin of photoelectrical coupler U are connected with resistance R 2 one ends, this tie point also is connected with transistor base, the transmitter of triode is connected with resistance R 3 one ends, resistance R 3 other ends are connected with output 4 pin of photoelectrical coupler U, this tie point also is connected with constant voltage source negative electricity output 2, relay coil J and diode D are connected in parallel, the anodic bonding point of diode D is connected with triode BG collector electrode, the cathode connection of diode D is connected with resistance R 2 other ends, this tie point also is connected with stabilized voltage power supply positive electricity output 1, foregoing circuit connected and composed the switch trip drive circuit.Relay tip J1 connects with breaking coil TQ, and 5 pin, 6 pin two ends are connected with the tripping operation power supply.
When cable temperature surpasses set point; temperature sensor contact in protection control line RX disconnects; the input of photoelectrical coupler U does not have electric current to flow through; output 3 pin of photoelectrical coupler U are high potential; triode BG saturation conduction, relay J inhale and, its contact J1 closure; the tripping operation of connection trip circuit, disconnect cable circuit.
Claims (2)
1. a fire-proof cable and prevent the protective circuit of cable fire, comprise fire-proof cable and the protective circuit that prevents cable fire, it is characterized in that: described fire-proof cable is to add protection control line (1) in existing cable, protection control line (1) is connected in series a plurality of temperature sensors by plain conductor or conductive rubber, conductive plastics, and temperature sensor is bimetallic temperature sensor, prevent that the protective circuit of cable fire is by protection control line testing circuit, the switch trip drive circuit, constant-current supply and constant voltage source four parts form, protection control line testing circuit: by test button SYAN, protection control line RX, the input of resistance R 1 and photoelectrical coupler U forms, the end of test button SYAN is connected with protection control line RX mono-end, the protection control line RX other end is connected with resistance R 1 one ends, resistance R 1 other end is connected with constant-current supply (2) pin, the other end of test button SYAN is connected with constant-current supply (1) pin, resistance R 1 two ends are in parallel with input (1) pin (2) of photoelectrical coupler U, photoelectrical coupler input (1) pin is connected with the tie point of R1 with RX, photoelectrical coupler input (2) pin is connected with (2) pin tie point of constant-current supply with resistance R 1, switch trip drive circuit: by resistance R 2, R3, triode BG, relay coil J, diode D forms, resistance R 2 one ends are connected with the tie point of triode BG base stage with (3) pin of photoelectrical coupler U, the other end of resistance R 2 and relay coil J, the negative electrode of diode D is connected with the tie point of stabilized voltage power supply (1) pin, the output of photoelectrical coupler U (4) is connected with resistance R 3 one ends, this tie point also is connected with stabilized voltage power supply (2) pin, the other end of resistance R 3 is connected with triode BG emitter, the collector electrode of triode BG and relay coil J, the tie point of diode D anode connects, constant-current supply: be linear constant-current supply or non-linear constant-current supply, constant voltage source: be linear constant voltage source or non-linear constant voltage source.
2. a kind of fire-proof cable according to claim 1 and prevent the protective circuit of cable fire; it is characterized in that: protection control line testing circuit: the input of test button SYAN, protection control line RX and photoelectrical coupler U is connected in series; the order be connected in series does not require; both can be connected in series with input (1) pin of photoelectrical coupler U; also can be connected in series with input (2) pin of photoelectrical coupler U, can also connect test button SYAN, protection control line RX respectively respectively at two pins of photoelectrical coupler U input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220708943.6U CN203376991U (en) | 2012-12-20 | 2012-12-20 | Fire-hazard-preventing cable and protecting circuit preventing cable fire hazards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220708943.6U CN203376991U (en) | 2012-12-20 | 2012-12-20 | Fire-hazard-preventing cable and protecting circuit preventing cable fire hazards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203376991U true CN203376991U (en) | 2014-01-01 |
Family
ID=49839506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220708943.6U Expired - Fee Related CN203376991U (en) | 2012-12-20 | 2012-12-20 | Fire-hazard-preventing cable and protecting circuit preventing cable fire hazards |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203376991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349384A (en) * | 2019-07-18 | 2019-10-18 | 山东光韵智能科技有限公司 | Smart Logo stake alarm protecting apparatus |
-
2012
- 2012-12-20 CN CN201220708943.6U patent/CN203376991U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349384A (en) * | 2019-07-18 | 2019-10-18 | 山东光韵智能科技有限公司 | Smart Logo stake alarm protecting apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207939189U (en) | Breaker | |
| CN201966578U (en) | Arc extinguishing type electrical fireproof short circuit protection device | |
| CN102957057B (en) | Leakage-protection tripolar plug | |
| CN103094883B (en) | Intrinsic safety type power circuit and device with intrinsic safety type power circuit | |
| CN203376991U (en) | Fire-hazard-preventing cable and protecting circuit preventing cable fire hazards | |
| CN203103907U (en) | Electrical shock controller for experimental electrical equipment | |
| CN207459699U (en) | Mine power resource connecting detection device | |
| CN201750009U (en) | Household appliance leakage protection socket | |
| CN204834219U (en) | Thermistor with fuse | |
| CN202102987U (en) | Mining explosion-proof breaker circuit | |
| CN202940188U (en) | Fire protection device for photovoltaic confluence box | |
| CN101728014B (en) | Method for preventing cable fire | |
| CN205883643U (en) | Overheated and current foldback circuit of LED lamp plain type | |
| CN2753010Y (en) | Power socket with overcurrent and short circuit protective device | |
| CN202121290U (en) | Novel arc extinguishing type electrical fireproof short circuit protection device | |
| CN203103909U (en) | Low voltage zero line safety voltage value measuring instrument | |
| CN211456665U (en) | Explosion-proof isolation protection device for electricity consumption | |
| CN202860680U (en) | Control device of mining flameproof permanent magnet de-ironing separator | |
| CN203434104U (en) | Air switch capable of being connected with sensor | |
| CN201868862U (en) | Power supply circuit used for fireproof cable and preventing cable fire | |
| CN202178572U (en) | Flame-proof power supply only generating intrinsic safety type short circuit sparks | |
| CN207283154U (en) | A kind of lithium battery protection circuit | |
| CN110829356A (en) | Explosion-proof isolation protection device for electricity consumption | |
| CN202275643U (en) | Protection circuit for fire-proof cable and capable of preventing fire from occurring on cable | |
| CN203775170U (en) | High-voltage explosion-proof switch intrinsic safety pilot circuit with high stability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Xiaojie Document name: Notification to Pay the Fees |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20171220 |