CN2847627Y - Electronic anti-explosion safety power source - Google Patents
Electronic anti-explosion safety power source Download PDFInfo
- Publication number
- CN2847627Y CN2847627Y CN 200520118475 CN200520118475U CN2847627Y CN 2847627 Y CN2847627 Y CN 2847627Y CN 200520118475 CN200520118475 CN 200520118475 CN 200520118475 U CN200520118475 U CN 200520118475U CN 2847627 Y CN2847627 Y CN 2847627Y
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- circuit
- transformer
- triggering
- comparator
- circuits
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- 238000004880 explosion Methods 0.000 title abstract 2
- 239000003381 stabilizer Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 abstract 2
- 238000005070 sampling Methods 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 101000668170 Homo sapiens RNA-binding motif, single-stranded-interacting protein 2 Proteins 0.000 description 3
- 102100039690 RNA-binding motif, single-stranded-interacting protein 2 Human genes 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008393 encapsulating agent Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 description 1
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an electronic explosion protection safety power source. The utility model comprises a transformer, an electronic switching circuit, a triggering circuit, a pulse transformer, a current transformer, a sampling circuit and a comparison circuit, wherein a primary coil of the transformer is connected with an electric network through a fuse and an air switch; a group of secondary coils is connected with the electronic switching circuit; the other group of secondary coils supplies power to the triggering circuit; the electronic switching circuit is composed of three thyristors and three diodes which are connected reversely in parallel with the three thyristors; the triggering circuit provides control signals for the three thyristors of the electronic switching circuit through the pulse transformer; an output current of the current transformer is applied to both ends of a potentiometer after rectified by a rectifying bridge and supplied to the positive input end of the comparison circuit through the adjustable end of the potentiometer; the inverse input end of the comparison circuit is connected with the negative end of a voltage stabilizing tube through the other resistor; the positive end of the voltage stabilizing tube is grounded; the negative end is connected with the positive pole of the power source through a resistor and a control circuit; the output of a comparator is supplied to the triggering circuit through an inverter.
Description
Technical field
The utility model relates to the electronics explosion-proof safety power supply, particularly is applicable to the electronics explosion-proof safety power supply of coal industry.
Background technology
China's utility model patent discloses a kind of fire safety power supply that utilizes thermal circuit beraker to carry out overcurrent and short-circuit protection for No. 00231186.0, and the cooperation of this utility model by thermal circuit beraker and relay carried out overcurrent and short-circuit protection to circuit and equipment and reported to the police by the indicator light and the news Chinese percussion instrument of reporting to the police.But this fire safety power utilization mechanical contact switches on and off power supply, and common mechanical formula contact exists the defective of sparking when switching on and off.Although the designer can take the contact is placed sealing state, the measure that spark is not leaked, this has played the spark initiation effect of inflammable and explosive property gas on every side that prevents to a certain extent, but, in case encapsulant is aging, the spark that produces when perhaps being switched on or switched off burns and encapsulant around making when being destroyed for a long time, the flammable explosive gas around the contact disconnects or the spark that produces when connecting just ignites probably, for example, gas.
In addition, thermal circuit beraker and relay are adopted in the overcurrent protection of this equipment, because these component costs height, volume are big, can not reduce manufacturing cost and reduced volume effectively.And the spark that produces when contacting and disconnection can damage the contact to a great extent, thereby has shortened the useful life of equipment.This is unfavorable for popularizing and promoting of equipment.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned fire safety power supply; provide a kind of and switch on and off the electronics explosion-proof safety power supply of power supply by the controllable silicon electronic switch, this electronics explosion-proof safety power supply adopts electronic devices and components to realize the overcurrent and the short-circuit protection of power supply.
Electronics explosion-proof safety power supply of the present utility model comprises: transformer, electronic switching circuit, circuits for triggering, pulse transformer, current transformer, sample circuit, comparison circuit, it is characterized in that, described transformer has one group of primary coil and two groups of secondary coils, primary coil is connected with electrical network with air switch through fuse, one group of secondary coil is connected with the aftermentioned electronic switching circuit, and another group secondary coil is powered to described circuits for triggering; Described electronic switching circuit constitutes by three controllable silicons with three diodes of its reverse parallel connection, is connected with one group of secondary coil of above-mentioned transformer; Described circuits for triggering are connected with another group secondary coil of above-mentioned transformer, provide control signal by pulse transformer to three controllable silicons of above-mentioned electronic switching circuit; Described current transformer is used to detect the electric current of power supply major loop, and its output current is after-applied at the two ends of potentiometer through the rectifier bridge rectification, offers the positive input of comparison circuit described later by potentiometer; The positive input of described comparison circuit is connected with the adjustable end of above-mentioned potentiometer by a resistance, reverse input end is connected with the negative terminal of a voltage-stabiliser tube by another resistance, the positive ending grounding of voltage-stabiliser tube, negative terminal is connected with the positive source of control circuit by a resistance, the output of comparator offers circuits for triggering through an inverter, be used for locking circuits for triggering when overcurrent or short circuit take place, make circuits for triggering can not export trigger impulse.
The feature of electronics explosion-proof safety power supply of the present utility model is that also the output of its comparator also is connected with the anode of a light-emitting diode by a resistance, and the negativing ending grounding of light-emitting diode, this diode are used for carrying out light alarm when overcurrent protection.
The feature of electronics explosion-proof safety power supply of the present utility model is that also the output of its comparator also is connected with a buzzer, and the negativing ending grounding of buzzer, this buzzer are used for carrying out audible alarm when overcurrent protection.
The feature of electronics explosion-proof safety power supply of the present utility model also is; the output of its comparator also is connected with a normally closed button; the other end of this button is connected with the anode of a diode; the negative terminal of diode is connected with the positive input of above-mentioned comparator by a resistance; this circuit is used for locking comparator circuit when overcurrent protection, and button is used for this comparator circuit is resetted.
The utility model has overcome the spark phenomenon that may cause when mechanical contact switches on and off by adopting electronic switch, is specially adapted to exist the environment of flammable explosive gas, for example, and colliery, gas station etc.And, carry out overcurrent and short-circuit protection by adopting electronic component, not only protective circuit and equipment are not subjected to the infringement of overcurrent and short circuit safely and effectively, but also the cost that can save, reduce the volume of equipment.
Description of drawings
Fig. 1 is the block diagram of electronics explosion-proof safety power supply of the present utility model.
Fig. 2 is the circuit diagram of electronics explosion-proof safety power supply of the present utility model.
Embodiment
Below, with reference to accompanying drawing electronics explosion-proof safety power supply of the present utility model is elaborated.
Electronics explosion-proof safety power supply of the present utility model comprises: transformer 1, electronic switching circuit 2, circuits for triggering 3, pulse transformer 7, current transformer 8, sample circuit 4, comparison circuit 5, wherein, transformer 1 has one group of primary coil and two groups of secondary coils, primary coil is connected with electrical network with air switch through fuse, one group of secondary coil is connected with electronic switching circuit 2, and another group secondary coil is to circuits for triggering 3 power supplies; Electronic switching circuit 2 constitutes by three controllable silicon SCR 1, SCR2, SCR3 with three diode D1, D2, D3 of these three controllable silicon reverse parallel connections, and this electronic switching circuit 2 is connected with one group of secondary coil of transformer 1; Circuits for triggering 3 are connected with another group secondary coil of above-mentioned transformer, and these circuits for triggering 3 provide control signal by pulse transformer to three controllable silicons of electronic switching circuit 2; Current transformer 8 is used to detect the electric current of power supply major loop, and its output current is after-applied at the two ends of potentiometer W21 through the rectifier bridge rectification, offers the positive input of comparison circuit 5 by the adjustable end of potentiometer W21; The positive input of comparison circuit 5 is connected with the adjustable end of potentiometer W1 by resistance R 23, reverse input end is connected with the negative terminal of voltage-stabiliser tube DW21 by resistance R 24, the positive ending grounding of voltage-stabiliser tube DW21, negative terminal is connected with the positive source of control circuit by resistance R 22, the output of comparator IC offers circuits for triggering 3 through inverter 6, be used for locking circuits for triggering when overcurrent or short circuit take place, make circuits for triggering can not export trigger impulse.
The output of the comparator IC of electronics explosion-proof safety power supply of the present utility model also is connected with the anode of light-emitting diode D22 by resistance R 26, and the negativing ending grounding of light-emitting diode D22, this diode are used for carrying out light alarm when overcurrent protection.
The output of the comparator IC of electronics explosion-proof safety power supply of the present utility model also is connected with a buzzer FM, and the negativing ending grounding of buzzer FM, this buzzer are used for carrying out audible alarm when overcurrent protection.
The output of the comparator IC of electronics explosion-proof safety power supply of the present utility model also is connected with normally closed button S; the other end of this button S is connected with the anode of diode D21; the negative terminal of diode is connected with the positive input of comparator IC by resistance R 25; this circuit is used for locking comparison circuit 5 when overcurrent protection; so that light-emitting diode D22 and buzzer FM can continuous alarm, button S is used for this comparison circuit is resetted.
Below course of action of the present utility model is described, behind the air switch of connecting transformer 1 upstream, the rectifier bridge that alternating voltage is made of diode D11～D14 is rectified into direct voltage, this voltage charges through 11 pairs of capacitor C 11 of resistance R, after the voltage at electric capacity two ends reaches the conducting voltage of transistor T 1, this transistor T 1 conducting, electric current charges to capacitor C 12 through resistance R 13, after the voltage at capacitor C 12 two ends reaches the conducting voltage of transistor T 1, transistor T 1 conducting, capacitor C 12 discharges, by resistance R 14, transistor T 1, the circuit turn-on that resistance R 15 constitutes, primary coil to pulse transformer 7 provides a peak voltage, this peak voltage is amplified the control utmost point of after-applied three controllable silicon SCR 1～SCR3 at major loop by pulse transformer, controllable silicon SCR 1～SCR3 is triggered, and major loop is connected, and beginning is supplied with alternating voltage to power consumption equipment.
When normal operating current, the electric current of current transformer 8 output by the rectifier bridge rectification of forming by diode D21～D24 after, filter circuit filtering via resistance R 21 and capacitor C 21 compositions, be applied to the two ends of potentiometer W21, this voltage inputs to the positive input of comparator IC by the adjustable end of potentiometer W21, the adjustable end of adjusting potentiometer W21 makes the voltage of positive input of comparator IC a little less than the voltage of the reverse input end of this comparator IC, at this moment, comparator IC output low level, the light-emitting diode D22 that is connected this comparator IC output is not luminous, and the buzzer FM that is connected this output does not sound.This low level becomes high level through inverter 6 after anti-phase, outputs to the source electrode of the transistor T 1 of circuits for triggering 3, the circuits for triggering operate as normal.
The electric current that flows through current transformer 8 when short circuit or overcurrent increases, the voltage that is applied to potentiometer W21 two ends also increases, the current potential of the adjustable end of potentiometer W21 raises, when this current potential surpasses the current potential of reverse input end of comparator IC, comparator IC counter-rotating, the output high level, light-emitting diode D22 is luminous, and buzzer FM rings, and carries out light alarm and voice signal and reports to the police, simultaneously, this high level becomes low level after inverter 6 is anti-phase, this low level is applied to the source electrode of the transistor T 1 of circuits for triggering, and transistor T 1 can not conducting, circuits for triggering locking and can not send trigger impulse, electronic switch 2 turn-offs.This high level feeds back to the positive input of comparator IC through normally closed button S and diode D21, comparator IC self-locking, light-emitting diode D22 and buzzer FM continue to report to the police, and recover normal and press reset button S to reset up to circuit, and circuit runs well again.
The utility model has overcome the spark phenomenon that may cause when mechanical contact switches on and off by adopting electronic switch, is specially adapted to exist the environment of flammable explosive gas, for example, and colliery, gas station etc.And, carry out overcurrent and short-circuit protection by adopting electronic component, not only protective circuit and equipment are not subjected to the infringement of overcurrent and short circuit safely and effectively, but also the cost that can save, reduce the volume of equipment.
Claims (4)
1, a kind of electronics explosion-proof safety power supply comprises: transformer, electronic switching circuit, circuits for triggering, pulse transformer, current transformer, sample circuit, comparison circuit, it is characterized in that, described transformer has one group of primary coil and two groups of secondary coils, primary coil is connected with electrical network with air switch through fuse, one group of secondary coil is connected with the aftermentioned electronic switching circuit, and another group secondary coil is powered to described circuits for triggering; Described electronic switching circuit constitutes by three controllable silicons with three diodes of its reverse parallel connection, is connected with one group of secondary coil of above-mentioned transformer; Described circuits for triggering are connected with another group secondary coil of above-mentioned transformer, provide control signal by pulse transformer to three controllable silicons of above-mentioned electronic switching circuit; Described current transformer is used to detect the electric current of power supply major loop, and its output current is after-applied at the two ends of potentiometer through the rectifier bridge rectification, offers the positive input of comparison circuit described later by potentiometer; The positive input of described comparison circuit is connected with the adjustable end of above-mentioned potentiometer by a resistance, reverse input end is connected with the negative terminal of a voltage-stabiliser tube by another resistance, the positive ending grounding of voltage-stabiliser tube, negative terminal is connected with the positive source of control circuit by a resistance, the output of comparator offers circuits for triggering through an inverter, be used for locking circuits for triggering when overcurrent or short circuit take place, make circuits for triggering can not export trigger impulse.
2, electronics explosion-proof safety power supply as claimed in claim 1; it is characterized in that; the output of described comparator also is connected with the anode of luminous two diodes by a resistance, and the negativing ending grounding of light-emitting diode, this diode are used for carrying out light alarm when overcurrent protection.
3, electronics explosion-proof safety power supply as claimed in claim 2 is characterized in that, the output of described comparator also is connected with a buzzer, and the negativing ending grounding of buzzer, this buzzer are used for carrying out audible alarm when overcurrent protection.
4, as claim 1 to the described electronics explosion-proof safety power supply of arbitrary claim of claim 3; it is characterized in that; the output of its comparator also is connected with a normally closed button; the other end of this button is connected with the anode of a diode; the negative terminal of diode is connected with the positive input of above-mentioned comparator by a resistance; this circuit is used for locking comparator circuit when overcurrent protection, and button is used for this comparator circuit is resetted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520118475 CN2847627Y (en) | 2005-09-09 | 2005-09-09 | Electronic anti-explosion safety power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520118475 CN2847627Y (en) | 2005-09-09 | 2005-09-09 | Electronic anti-explosion safety power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2847627Y true CN2847627Y (en) | 2006-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520118475 Expired - Fee Related CN2847627Y (en) | 2005-09-09 | 2005-09-09 | Electronic anti-explosion safety power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2847627Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147383A (en) * | 2017-07-04 | 2017-09-08 | 孙长荣 | non-contact explosion-proof electronic switch |
| CN113842200A (en) * | 2020-11-30 | 2021-12-28 | 杭州德诺电生理医疗科技有限公司 | Pulse ablation instrument and control method thereof |
-
2005
- 2005-09-09 CN CN 200520118475 patent/CN2847627Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147383A (en) * | 2017-07-04 | 2017-09-08 | 孙长荣 | non-contact explosion-proof electronic switch |
| CN113842200A (en) * | 2020-11-30 | 2021-12-28 | 杭州德诺电生理医疗科技有限公司 | Pulse ablation instrument and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061213 Termination date: 20100909 |