CN1051274A - Combined protection system for remote illumination signs in coal mine - Google Patents
Combined protection system for remote illumination signs in coal mine Download PDFInfo
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- CN1051274A CN1051274A CN 90105986 CN90105986A CN1051274A CN 1051274 A CN1051274 A CN 1051274A CN 90105986 CN90105986 CN 90105986 CN 90105986 A CN90105986 A CN 90105986A CN 1051274 A CN1051274 A CN 1051274A
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Abstract
A kind of combined protection system for remote illumination signs in coal mine is applicable in the environment that contains damp and dust.At present, make the Current Transformer method realize the short-circuit protection that throws light on both at home and abroad, this method is to take off the short-circuit signal electric current from circuit, makes the main circuit tripping operation cut off the power supply, and this method guard space is short, and sensitivity is unreliable.This device is to adopt to take off short-circuit signal voltage from circuit; function by main circuit, control circuit and protective circuit; no matter make circuit how long; the electric current power; as long as protective circuit collects short-circuit signal voltage; can make the action reliably of this device, thereby reach the purpose that guard space is long, device sensitivity is high.
Description
A kind of combined protection system for remote illumination signs in coal mine is used for containing the environment of damp and coal dust, and as mine, coal road etc. belong to electric security protector field, colliery.
At present, domestic in above-mentioned environment, as colliery, roadway etc., what be used for the illumination sign short-circuit protection is the Current Transformer method, and its short-circuit protection operation principle as shown in Figure 1.When lighting circuit d point is short-circuited, take out the short-circuit signal electric current by current transformer, make main circuit A.C. contactor tripping operation outage through links such as rectification, filtering, amplitude discrimination, amplification, execution, reach the purpose of short-circuit protection.The power supply distance that this Protection Code is protected, the size of electric current when depending on supply line's short circuit fully.The existing market product supplied is that 2.5 kilovolt-amperes, power supply distance are 500 meters colliery lighting signal comprehensive protectors.As the patent " 127 volts of lighting signal comprehensive protectors under the coal mine " of mining equipment factory of Beijing coal industry school, the patent No.: the 85205267U applying date: the day for announcing on December 7th, 85: on August 13rd, 86.
The deficiencies in the prior art part is: instrument transformer gets the power of signal and depends on the short circuit current size because the line of mine lighting circuit footpath is thin; so the used device of this method exists sensitivity little; defectives such as the illuminating line of protection is short out; and the illuminating line of down-hole is long, certainly will cause the disadvantage of using a plurality of protective devices.
The objective of the invention is: propose a kind of new device, do not hold the lamp voltage signal installation method for getting to change the current transformer method.That is to say when illuminating line d point is short-circuited fault; (as shown in Figure 2) line voltage distribution disappears; being connected on distant place annex that circuit do not hold gets less than voltage and just stops the transmitting carrier frequency signal; after main frame carrier wave receiving circuit does not receive signal; through the tripping operation of relevant link control main circuit, reach the purpose of short-circuit protection.
Technical scheme of the present invention is: this device is made up of 2 two individual cavity of wire connection cavity 1 and main chamber, and its structure as shown in Figure 3, Figure 4.Wire connection cavity 1 has cable entry 3, and relevant cable is all from then in the access device.Wire connection cavity 1 is positioned at the top in main chamber 2; Be provided with electric component fuse 4 and main transformer 5 in the main chamber 2, the main circuit of this device, control circuit, illumination, signal shorts protective circuit, leakage protection circuit all place on the electric component fuse 4.Main chamber 2 and wire connection cavity 1 place on the skid 6.The circuit of this device as shown in Figure 5.Be divided into main circuit, control circuit and protective circuit three parts.Main circuit is made up of switch, fuse, main transformer and A.C. contactor, 660 volts or 380 volts of supply voltages can be transformed into 127 volts of lighting voltages, and the break-make by 127 volts of lighting loads of CJ A.C. contactor control.Control circuit is made up of control transformer, stop button, starting button, ac contactor coil and relay J normally-closed contact.Protective circuit then is that four branches of earth leakage protective circuit is formed by DC-stabilized circuit, illumination short-circuit protection circuit, signal shorts protective circuit.
DC-stabilized circuit: then 18 volts of windings of control transformer, rectifier bridge, electric capacity, integrated package of pressure-stabilizing IC6.Resistance, voltage-stabiliser tube are formed, and provide D.C. regulated power supply for protecting loop and fault show circuit.
The illumination short-circuit protection circuit: 1. annex circuit in a distant place is by short-circuit voltage sampling (being made of electric capacity, diode); Illumination short circuit identification circuit (fuse, resistance, voltage-stabiliser tube, triode); Carrier wave and radiating circuit electronic components such as (constitute) phase-locked loop tone decoders are formed.2. main frame carrier wave receiving circuit (elements such as integrated package, triode, output transformer).Lighting circuit is when normal operation, and 2 pin of ic chip 4 are exported high level, and relay is motionless.During short circuit, distant place annex radiating circuit is stopped paying out the 47KC signal, and main frame does not receive the 47KC CF signal, 2 pin output low levels of ic chip 4, and the relay J action, the tripping operation of control contactor coil, thus make the main circuit outage.
Signal shorts protection loop: form by ic chip 3, resistance, electric capacity, diode, voltage-stabiliser tube, rectifier bridge, switch.Just often, rectification goes out the direct voltage deficiency so that IC3 integrated package rotary movement; The direct voltage foot that rectification is come out when breaking down makes the upset of IC3 integrated package, relay J action, and control loop dead electricity, major loop tripping operation, indicator light shows signal short trouble, IC3 integrated package are remembered signal circuit.
Leakage protection circuit: form by triode, ic chip 1, IC2, resistance, electric capacity.Do not send in mains lighting supply under the situation of electricity, when there was leak current fault in the networking, circuit can be realized earth leakage search/lockout.Its principle is: the last electric leakage signal voltage of R8, R9 makes ic chip 2 upsets, and output becomes electronegative potential by high potential, the relay J adhesive, and the control loop dead electricity, major loop tripping operation outage, luminous signal shows leak current fault.
The invention is characterized in: wire connection cavity 1 and main chamber 2 are two independently cavitys, and wire connection cavity 1 is above main chamber 2.Cable entry 3 is arranged on the wire connection cavity 1, and the cable of access is by the corresponding circuit connection on the electric elements fuses 4 in flame proof binding post and the main chamber 2.Main transformer 5 is in main chamber 2.Main circuit, control circuit, illumination short-circuit protection circuit, signal shorts protective circuit and leakage protection circuit are arranged on the electric elements fuse 4, and main chamber 2 and wire connection cavity 1 place on the skid 6.Main circuit on the electric component fuse 4 is made up of switch, fuse, main transformer, A.C. contactor, and control circuit is made up of control transformer, stop button, starting button, A.C. contactor, relay J normally closed interlock.D.C. regulated power supply in the protective circuit is made up of 18 volts of windings, rectifier bridge, capacitor, ic chip 6, resistance, the voltage-stabiliser tube of control transformer; Illumination short-circuit protection circuit is made up of distant place annex and main frame carrier wave receiving circuit two parts.And short-circuit voltage sample circuit that distant place annex is made up of electric capacity, diode and the illumination short circuit identification circuit of forming by fuse, resistance, voltage-stabiliser tube triode and form by the carrier transmit circuit that elements such as phase-locked loop tone decoder are formed; The signal shorts protection circuit is made up of ic chip 3, resistance, electric capacity, diode, voltage-stabiliser tube, rectifier bridge, switch; Leakage protection circuit is made up of triode, ic chip 1, IC2, resistance, electric capacity.
Fig. 1 is the prior art schematic diagram;
Fig. 2 is principle of the invention figure;
Fig. 3 is a shape assumption diagram of the present invention (side direction);
Fig. 4 is a shape assumption diagram of the present invention (facing);
Fig. 5 is the circuit diagram on the electric component fuse of the present invention.
Below in conjunction with embodiment, to the further enumeration in addition of the present invention: the explosion-resistant enclosure that common iron is made is divided into 2 two separate chamber in wire connection cavity 1 and main chamber.Wire connection cavity 1 is above main chamber 2, and two cavity superpositions are located on the skid 6 of bottom.There is hagioscope in the preceding door closure dead ahead in main chamber 2, and the light-emitting diode that sees through in the glass can finder internal electric ruuning situation.Electric component fuse 4 and main transformer 5 place in the main chamber 2, and 660 volts or 380 volts of voltage insert main transformers 5 from the cable entry 3 of wire connection cavity 1 and is transformed into 127 volts of mains lighting supplies.Circuit on the electric elements fuse 4 of the present invention is such: main circuit 7 is by isolating switch GK, and fuse 1RD, 2RD, main transformer B, A.C. contactor are formed.Control circuit 8 is by control transformer 127 hint circles; stop button TA; starting button QA; ac contactor coil; relay J device normally closed interlock is formed; protective circuit is made up of distant place annex 10 circuit and protective circuit 9 two parts again; D.C. regulated power supply in the protective circuit 9 is by 18 volts of windings of control transformer; rectifier bridge Z1 '; capacitor C 1; C2; integrated package of pressure-stabilizing IC6; resistance R 26; DW1 forms; 18 volts of alternating currents are through Z1 ' rectification; capacitor C1; C2 filtering; the voltage stabilizing of IC6 integrated voltage stabilizer is for protective circuit 9 loops and fault show circuit provide 12 volts of D.C. regulated power supplies.12 volts of direct currents are accepted circuit through R26 step-down, 8 volts of direct voltages of voltage-stabiliser tube DW1 voltage stabilizing output for carrier wave again and are used.Illumination short-circuit protection function of the present invention is carried out by main frame carrier wave receiving circuit two parts in distant place annex 10 circuit and the protective circuit 9.Annex 10 circuit in a distant place are made up of illumination short-circuit voltage sample circuit, short circuit recognition power switch circuit and carrier transmit circuit.The short-circuit voltage sample circuit is made of capacitor C 15, C16, C17, diode D17～D23; Illumination short circuit identification power switch circuit is made up of fuse 4RD, resistance R 36, R37, R38, R39, R40R44, voltage-stabiliser tube DW3, triode T4.The carrier transmit circuit is made up of phase-locked loop tone decoder LM567, R41, R42, R43, capacitor C 19, triode T5.When lighting power supply line just often, do not hold light fixture voltage through Z1, Z2, the Z3 binding post enters distant place annex 10, through C15, C16, the C17 step-down, D17～D23 three-phase bridge rectification, the C18 capacitor filtering, in resistance R 36, one of the last generation of R37 is proportional to light fixture and does not hold direct voltage (about 12 volts) again through resistance R 44, triode T4, voltage-stabiliser tube DW4 voltage stabilizing, for the carrier transmit circuit provides 8 volts of direct voltages, take out normal working voltage signal through R38 from resistance R 37, or R39, R40 makes T4 base stage positively biased, the T4 saturation conduction, the radiating circuit of forming with phase-locked audio frequency long codecs LM567 integrated package obtains starting of oscillation behind the power supply, by capacitor C 21, C22 is coupled to the 47KC carrier signal on 127 volts of illuminating lines and the earth connection.The main frame receiving circuit is received the 47KC carrier signal of distant place annex 10 in protective circuit 9; IC5 phase-locked loop tone decoder LM567 output pin 8 ends of protective circuit 9, be low level, IC4 chip output 2 pin high level by the high potential saltus step; relay J is failure to actuate, and this device is in normal operating condition.When any two-phase of illuminating line is short-circuited, three-phase bridge rectifier circuit direct voltage on the distant place annex 10 will be than normal decline 20～30%, voltage is also along with decline on the resistance R 37, this moment, triode T4 base loop was anti-inclined to one side, triode T4 turn-offs, by radiating circuits that element is formed such as phase-locked loop tone decoder LM567 because of there not being the power supply failure of oscillation, the 47KC carrier signal disappears, main frame carrier wave receiving circuit in the circuit 9 is not because of receiving carrier signal, output 8 pin of IC5 integrated package are high potential by the electronegative potential saltus step, IC4 chip output 2 pin become electronegative potential by high potential, the relay J action, the relay J normally closed interlock of string in control circuit 8 is by normally closed disconnection, the CJ ac contactor coil power failure tripping of being converted to, the major loop outage, the bright demonstration short trouble of 4LED luminescent diode red lamp.IC4 integrated package 10 pin feed back to positive signal of input by D12, R25 simultaneously, make IC4 carry out permanent memory to short trouble, have only the isolating switch of disconnection, unshorting fault could remove memory, recover normally operation.During punch through damage, voltage-stabiliser tube DW3 punctures at once for some reason for electric capacity C15, C16, C17 on distant place annex 10, diode D17～D23, and fast acting fuse 4RD fusing prevents that 127 volts of power supply strings from advancing weak electrical loop and burning electronic component.
The signal shorts defencive function of this device is by the ic chip in the protective circuit 93, resistance R 20, R21, R22, R31～R36, capacitor C 5, C14, diode D9, D10 voltage-stabiliser tube DW2, and the circuit that rectifier bridge Z2 ', toggle switch etc. are formed is carried out.Signal circuit just often, current signal is through bridge rectifier Z2 ' rectification on the current transformer, the direct voltage deficiency that rectification goes out is so that IC3 integrated package rotary movement.When signal circuit was short-circuited fault, the direct voltage foot overturn the IC3 integrated package on Z2 ' rectifier bridge, and IC3 output 2 pin are low level by the high level saltus step, relay J adhesive, control loop dead electricity, major loop tripping operation.3LED light-emitting diode amber light is bright, demonstrates the signal circuit fault, and the IC3 integrated package is remembered signal circuit.
This device creepage protection function is by triode T1, T2, ic chip 1, IC2, resistance R 1～R10, the R12～R16 of circuit 9, and the circuit that diode D1～D7, D15, capacitor C 3, C4 form is carried out.Do not send in mains lighting supply under the situation of electricity, when there was leak current fault in the networking, circuit can be realized earth leakage search/lockout.Its action circuit positive supply → D15 → CJ2 normally-closed contact → ground → insulation resistance → Z1 or Z2, Z3 → R17 or R18, R19 → D4 or D5, D6 → R5 → R7 → R8 → R9 → negative supply.Resistance R 8, the last electric leakage signal voltage of R9 make ic chip 2 upsets, and output 2 pin are electronegative potential by high-order saltus step, relay J adhesive, control loop dead electricity, major loop tripping operation outage.The 2LED luminescent diode red lamp is bright, shows the earth leakage search/lockout fault.The IC2 integrated package is remembered earth leakage search/lockout simultaneously.Send under the electricity condition for 127 volts in illumination, if leak current fault takes place, it detects the loop is Z1 or Z2, Z3 → R17 or R18, R19 → D4 or D5, D6 → R5 → R7 → R8 → R9 → D2 → No. 16 female terminal → insulation resistance → Z1 or Z2, Z3.The ohmically electric leakage signal voltage of R8, R9 makes ic chip 2 upsets, output 2 pin of IC2 integrated package are low level by the high level saltus step, the relay J adhesive, control loop dead electricity, major loop trip, the 2LED luminescent diode red lamp is bright, show the leakage tripping fault, the IC2 integrated package is remembered leakage tripping.This installs the permanent memory of each function line tripping, all gets rid of the rear in fault and makes disappearance, recovers normal.IC1～the IC5 that is carried in the literary composition is commercially available integrated package JEC-2.
The insulation risks alert detection circuitry is the same, and when the insulation resistance on the illuminating line was lower than 15 kilo-ohms, R7, R8, the last electrical leakage voltage signal of R9 made integrated IC1 upset, are electronegative potential by the high potential saltus step, and 1LED light-emitting diode amber light is bright, shows insulation risks.
The present invention has following advantage compared with prior art: the protection power supply distance is long, can improve utilization rate of equipment and installations 100%, the device sensitivity height, and function is complete, is the reliable protective device of colliery mine lighting, signal, networking and personal safety.
Fig. 5 is Figure of description of the present invention.
Claims (3)
1, a kind of colliery lighting signal comprehensive protector is made up of cavity, main transformer, electric component fuse; It is characterized in that: wire connection cavity is above main chamber, wire connection cavity has cable entry, main transformer, electric component fuse are in main chamber, and the circuit on the electric elements fuse is such: main circuit is made up of switch, fuse, main transformer, A.C. contactor; Control circuit is made up of control transformer, stop button, starting button, ac contactor coil, relay normally-closed contact; Protective circuit is made up of DC-stabilized circuit, illumination short-circuit protection circuit, signal shorts protective circuit, leakage protection circuit; Wherein DC-stabilized circuit is made of 18 volts of windings of control transformer, rectifier bridge, capacitance voltage stabilizing integrated package, resistance, voltage-stabiliser tube; The illumination short-circuit protection circuit, then distant place annex circuit and main frame carrier wave receiving circuit (integrated package, triode, output transformer) two parts of being made up of (electric capacity, diode constitute) short-circuit voltage sample circuit, (fuse, resistance, voltage-stabiliser tube, triode constitute) illumination short circuit identification circuit, (phase-locked loop tone decoder formation) carrier transmit circuit constitute; Signal shorts protection loop is made up of integrated package, resistance, electric capacity, diode, voltage-stabiliser tube, rectifier bridge, switch; Leakage protection circuit is made up of triode, integrated package, resistance, electric capacity.
2, colliery according to claim 1 lighting signal comprehensive protector, it is characterized in that: the rectifier bridge in the short-circuit voltage sample circuit is made up of D17～D23 diode.
3, colliery according to claim 1 lighting signal comprehensive protector, it is characterized in that: the model of IC1～IC5 integrated package is JEC-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105986 CN1025975C (en) | 1990-11-27 | 1990-11-27 | Combined protection system for remote illumination signs in coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105986 CN1025975C (en) | 1990-11-27 | 1990-11-27 | Combined protection system for remote illumination signs in coal mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051274A true CN1051274A (en) | 1991-05-08 |
| CN1025975C CN1025975C (en) | 1994-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90105986 Expired - Fee Related CN1025975C (en) | 1990-11-27 | 1990-11-27 | Combined protection system for remote illumination signs in coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025975C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036169C (en) * | 1993-07-21 | 1997-10-15 | 淮南矿业学院 | High-effect long distance power supply and short circuit protecting method for illumination and signal of coal mine well |
| CN1044302C (en) * | 1994-10-12 | 1999-07-21 | 褚衍芝 | Relay protector |
| CN103199485A (en) * | 2013-04-10 | 2013-07-10 | 南京双京电器集团有限公司 | Explosion-proof type long distance short circuit protector |
| CN109510036A (en) * | 2017-09-15 | 2019-03-22 | 西华大学 | A kind of plate with short-circuit protection function |
| CN114243929A (en) * | 2021-12-29 | 2022-03-25 | 广州市万保职业安全事务有限公司 | Electric appliance management circuit for gas station safety |
-
1990
- 1990-11-27 CN CN 90105986 patent/CN1025975C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036169C (en) * | 1993-07-21 | 1997-10-15 | 淮南矿业学院 | High-effect long distance power supply and short circuit protecting method for illumination and signal of coal mine well |
| CN1044302C (en) * | 1994-10-12 | 1999-07-21 | 褚衍芝 | Relay protector |
| CN103199485A (en) * | 2013-04-10 | 2013-07-10 | 南京双京电器集团有限公司 | Explosion-proof type long distance short circuit protector |
| CN103199485B (en) * | 2013-04-10 | 2016-03-02 | 南京双京电器集团有限公司 | A kind of flame-proof type long distance short-circuit protector |
| CN109510036A (en) * | 2017-09-15 | 2019-03-22 | 西华大学 | A kind of plate with short-circuit protection function |
| CN114243929A (en) * | 2021-12-29 | 2022-03-25 | 广州市万保职业安全事务有限公司 | Electric appliance management circuit for gas station safety |
| CN114243929B (en) * | 2021-12-29 | 2023-11-03 | 重庆磊博石化有限公司 | Electrical appliance management circuit for gas station safety |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1025975C (en) | 1994-09-21 |
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