CN2041079U - Integrated device for mining explosion-proof electric-drill transformer - Google Patents

Integrated device for mining explosion-proof electric-drill transformer Download PDF

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Publication number
CN2041079U
CN2041079U CN 88217500 CN88217500U CN2041079U CN 2041079 U CN2041079 U CN 2041079U CN 88217500 CN88217500 CN 88217500 CN 88217500 U CN88217500 U CN 88217500U CN 2041079 U CN2041079 U CN 2041079U
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point
resistance
diode
meet
connect
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CN 88217500
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魏子良
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Abstract

The utility model discloses an integrated device for mining explosion-proof electric-drill transformer, comprising a main circuit, an electric leakage loop, a pilot loop, a triangular short-circuit protection circuit, a motor versatile protection line, etc. In a transformer in the main circuit, a copper wire whose current speed is around 2.5a/mm+[2] is adopted to be directly wound on a cold pressure iron and steel stem. The integrated device has the advantages of simple circuit controlling, convenient maintenance, etc., having a variety of protection functions of leading, overcurrent, short circuit, electric leakage, phase interruption, unbalanced three phases, etc.

Description

Integrated device for mining explosion-proof electric-drill transformer
The utility model belongs to flame-proof type electric drill tranformer protection technical field.
Existing flame-proof mine electric drill transformer integration unit, the control circuit complexity that is adopted not only exists maintenance difficult, and its defencive function is also few, and whole installation weight is heavy.
For a kind of novel, that control circuit is simple, defencive function is many, in light weight, flame-proof mine electric drill transformer integration unit that cost is low is provided, designed the utility model.
The utility model is on original main circuit basis, has simplified original earth leakage protective loop, the guide loop, and short-circuit protection circuit, and increased the complete motor comprehensive protection circuit of a cover defencive function.Transformer of the present utility model is that the employing current density is 2.5A/mm 2About copper cash directly be entangled on the cold-pressed steel iron core column.Like this, not only save material, and between coil internal layer and iron core column and the intercoil insulation spoilage low, it is strong promptly to resist the mechanical stress ability.
Novel flame-proof mine electric drill transformer integration unit has than original flame-proof mine electric drill transformer integration unit: a. control circuit is simple, easy to maintenance.B. defencive function increases, and comprises kinds of protect functions such as guide, overcurrent, short circuit, electric leakage, the phase failure, three-phase imbalance.C. weight saving, cost reduce.
Accompanying drawing 1 is the main circuit of flame-proof mine electric drill transformer integration unit.1 is the earth leakage protective loop among the figure, and 2 is the guide loop, and 3 is the triangle short circuit, and 4 is the motor comprehensive protection circuit, and 5 is electric coal drill.
Accompanying drawing 2 is for being connected to the earth leakage protective loop feature of main circuit.
Accompanying drawing 3 is for being connected to guide's loop feature of main circuit.
Accompanying drawing 4 is the triangle short-circuit protection circuit.
Accompanying drawing 5 is the motor comprehensive protection circuit.
Embodiment of the present utility model further is illustrated according to accompanying drawing.
Novel flame-proof mine electric drill transformer integration unit is the main circuit that utilizes existing flame-proof mine electric drill transformer; as shown in Figure 1; but earth leakage protective loop 1, guide loop 2, short-circuit protection circuit 3 have been carried out the circuit simplification, and increased a complete motor comprehensive protection circuit 4.Transformer in this novel flame-proof mine electric drill transformer integration unit is that to adopt current density be 2.5A/mm 2About copper cash directly be entangled on the cold-pressed steel iron core column, this not only saves material, weight reduction, and between coil internal layer and iron core column and the intercoil insulation spoilage low, it is strong promptly to resist the mechanical stress ability.
The line connecting relation in the guide loop 2 after the simplification is: from a 4Connect the M point behind the normally closed node of termination CJ, from a 5Meet N point, diode D behind the normally closed node of termination CJ 6Positive pole connects the N point, and negative pole connects the M point.a 6End passes through relay J 3Normally closed node J 3Connect the M point, a 7End passes through capacitor C 11Connect the M point, the M point passes through relay J 3often open node J 3Connect the N point, the N point is through relay J 2Normally closed node J 2Succeed electrical equipment J 3, and then succeed electrical equipment J 4often open node J 4To a 7End is in relay J 3Other diode D in parallel 7a 7End is through the suitable diode D that connects of parallel connection 8And capacitor C 12Connect the N point, the N point is through resistance R 11Back and a 7End is connected on bridge rectifier Z respectively 3Two ends, Z 3In addition two termination H 1, H 2Any one pipe fitting of no use in this guide loop (as triode, single crystals pipe, controllable silicon etc.) comes control relay J 3, relay J 3In the direct place in circuit, and the guide loop separates fully with short-circuit protection circuit.
Electric coal drill 5 bat-handle switch DJ close " Z 3" "+" (be a 6)---J 3Normally closed node---normally closed node of CJ---A phase line (a 4)---DJ electric coal drill motor windings---C phase line (a 5)---normally closed node of CJ---J 2Normally closed node---relay J 3Coil---J 4Often open node (closed)---" Z 3" "-" (a 7).
J 3Adhesive, contactor CJ adhesive, J 3Normally closed node just disconnect J 3Often to open node just closed, the normally closed node of CJ disconnects capacitor C 11Relay J is kept in discharge 3Continue the moment conducting, electric coal drill 5 work.Instrument transformer (C, T) H 1, H 2Send electricity and keep relay J through rectifying and voltage-stabilizing 3Normally.
The line connecting relation in the earth leakage protective loop 1 after the simplification is: from a 1End is leaded up to resistance R 5, R 6Meet diode D 4Positive pole, D 4Minus earth, another road is through resistance R 7After connect capacitor C respectively 9To a 2End and order crystallizer UJT 1The e utmost point.Resistance R 5And R 6Tie point meet a 2End is from a 3End passes through resistance R 10Difference connecting resistance R 8To single crystals pipe UJT 1B 2The utmost point, connecting resistance R 9, relay J 1often open node J 1To single crystals pipe UJT 1B 1The utmost point meets voltage-stabiliser tube D in parallel 3And capacitor C 10To a 2End.Single crystals pipe UJT 1B 1The utmost point is succeeded electrical equipment J 1To a 2End is in relay J 1Other diode D in parallel 5
When electric leakage takes place: " Z 1" "+" (be a 1) through resistance R 5, R 6Go into ground one through 3DK, 1DK-" Z 1" "-".As variable resistor R 5Both end voltage reaches certain numerical value, single crystals pipe UJT 1Conducting, relay J 1Action, J 1Normally closed node disconnect, contactor CJ ends, DJ disconnects.Relay J 1often open the node closure after self-insurance make J 1Continuing conducting gets rid of until fault.
Short-circuit protection circuit 3 after the simplification is three-phase dihedral connection short-circuit protection circuits.The annexation of its circuit is: b 1' b 2Termination b 2' b 3End, b 1b 3' end and b 2' b 3End meets bridge rectifier circuit Z respectively 3Two ends, Z 5Other two ends, a termination a 8, another terminating diode D 10Positive pole, D 10Negative pole meet a 9, b 1' b 2End and b 2' b 3End meets bridge rectifier Z respectively 4Two ends, Z 4In addition two ends, an end is by parallel resistor R 12And relay J 4Normally closed node J 4After succeed electrical equipment J 4, connect the other end again, and between this two end cross-over connection one capacitor C 13, in relay J 4Other diode D in parallel 9b 1' b 2Termination b 1b 3' end, b 1b 3' end passes through resistance R 13Meet b 2' b 3End.
When three-phase shortcircuit took place, the every phase voltage of dihedral connection all descended, and makes the relay J of adhesive 4End, like this, J 4The node of often opening disconnect relay J again 3End, contactor CJ stops adhesive, cuts off the electricity supply.
When line to line fault took place, the inner triphasic potential imbalance of dihedral connection was in inner circulation, the resistance R of forming of dihedral connection 18There is voltage at two ends, single crystals pipe UJT 2Conducting, relay J 2Action, J 2Normally closed node disconnect relay J 3End, make closed J 3Often open node again for disconnecting, CJ stops, and cuts off the electricity supply.In order to prevent that the guide loop from causing misoperation by the conducting of three-phase loop, connect resistance R 1, R 2, during the electric coal drill operation, CJ is normally closed disconnected, and CJ often opens and closes, with resistance R 1, R 2Short circuit.Dihedral connection short-circuit protection also can be avoided because the three-phase shortcircuit electric current differs the too for a short time misoperation that causes with the electric coal drill starting current.
A complete motor comprehensive protection circuit that increases newly, its annexation is: from a 8End passes through resistance R 20To the P point, at P point and a 9Resistance R in the difference cross-over connection between the end 21, R 22, capacitor C 17, P point order crystallizer UJT 2The e utmost point.Diode D 21Positive pole connects the O point, and negative pole connects the P point, O point and a 9Connecting resistance R between the end 19, pass through resistance R from the Q point 17After meet diode D respectively 17Positive pole, D 17Negative pole connect the P point; Connecting resistance R 23To diode D 18Positive pole, D 18Negative pole connect the P point; Between Q point and E point respectively and meet bridge rectifier Z 6, resistance R 14, capacitor C 14Between Q point and F point respectively and meet bridge rectifier Z 7, resistance R 15, capacitor C 15Between Q point and T point respectively and meet bridge rectifier Z 8, resistance R 16, capacitor C 16Triode D 11Positive pole connects the E point, and negative pole meets W point, diode D 12Positive pole meets a 9End, negative pole connects the E point; Diode D 13Positive pole connects the F point, and negative pole meets W point, diode D 14Positive pole meets a 9End, negative pole connects the F point; Diode D 15Positive pole connects the T point, and negative pole meets W point, diode D 16Positive pole meets a 9End, negative pole connects the T point.Between W point and O point, connect a resistance R 18Single crystals pipe UTT 2B 1The utmost point is succeeded electrical equipment J 2To a 9End is in relay J 2Other diode D in parallel 19Single crystals pipe UJT 2B 2The utmost point passes through resistance R 24After connect capacitor C in parallel respectively 18, voltage-stabiliser tube D 20To a 9End; Connecting resistance R 25, bridge rectifier Z 9To a 9End.Z 9In addition two termination d 1, d 2Z 6, Z 7, Z 8In addition two ends be to be connected on power supply to give H on the three-phase line of electric coal drill 3, H 4, H 5, H 6, H 7, H 8
Triple line is passed small-sized instrument transformer (C, T) iron core, secondary H 3, H 4, H 5, H 6, H 7, H 8Through Z 6, Z 7, Z 8Rectification.
When overcurrent or three-phase shortcircuit took place, three rectification circuits "+" common ground Q was through resistance R 17, R 22And diode D 12, D 14, D 16Get back to each "-" end, i.e. E, F, T.Capacitor C 17Both end voltage reaches certain numerical value, single crystals pipe UJT 2Conducting, relay J 2Action, relay J 3End, CJ stops.This is the inverse time lag circuit, and overcurrent is bigger, resistance R 22Both end voltage is higher, UJT 2ON time is faster.
When the phase failure, line to line fault or three-phase imbalance take place when, resistance R 18, R 19On voltage is arranged, this voltage is by passing through D 11～D 16And three commutating circuit Z 6～Z 8Circulation produce, regulate resistance R 18And R 19Numeric ratio can be aligned within the specific limits and make UJT 2The circulation size of conducting, and levelling UJT 2The time length of each conducting.Resistance R 9Both end voltage reaches certain numerical value, UJT 2Conducting, relay J 2Action, relay J 3End, CJ stops, and cuts off the electricity supply.
Rectification circuit Z 9Exchange end d 1, d 2End is 36 volts of alternating voltages from contactor for 36V.

Claims (3)

1, a kind of new type mining flame-proof type electric drill transformer integration unit is on original main circuit basis, has simplified original earth leakage protective loop, the guide loop, and short-circuit protection circuit, and increased a complete motor comprehensive protection circuit, it is characterized in that:
A. with a 1End is leaded up to resistance R 5, R 6Meet diode D 4Positive pole, D 4Minus earth, another road is through resistance R 7After connect capacitor C respectively 9, to a 2End, order crystallizer UJT 1The e utmost point; Resistance R 5And R 6Tie point meet a 2End; From a 3End passes through resistance R 10Difference connecting resistance R 8To single crystals UJT 1B 2The utmost point, connecting resistance R 9, relay J 1often open node J 1To single crystals pipe UJT 1B 1The utmost point meets voltage-stabiliser tube D in parallel 3And capacitor C 10To a 2End; Single crystals pipe UJT 1B 1The utmost point is succeeded electrical equipment J 1To a 2End is in relay J 1Other diode D5 in parallel.
B. from a 4Connect the M point behind the normally closed node of termination CJ, from a 5Meet N point, diode D behind the normally closed node of termination CJ 6Positive pole connects the N point, and negative pole connects the M point; a 6End passes through relay J 3Normally closed node meet J 3Connect the M point, a 7End passes through capacitor C 11Connect the M point, the M point passes through relay J 3often open node J 3Connect the N point, the N point is through relay J 2Normally closed node J 2Succeed electrical equipment J 3, and then succeed electrical equipment J 4often open node J 4To a 7End is in relay J 3Other diode D in parallel 7a 7End is through the suitable diode D that connects of parallel connection 8And capacitor C 12Connect the N point, the N point is through resistance R 11Back and a 7End is connected on bridge rectifier Z respectively 3Two ends, Z 3In addition two termination H 1, H 2
C.b 1' b 2Termination b 1b 3' end, b 1b 3' end is by electric capacity R 13Meet b 2' b 3End, b 1' b 2Termination b 2' b 3End, b 1b 3' end and b 2' b 3End meets bridge rectifier Z respectively 5Two ends, Z 5Other two ends, a termination a 8, another terminating diode D 10Positive pole, D 10Negative pole meet a 9b 1' b 2End and b 2' b 3Meet bridge rectifier Z respectively 4Two ends, Z 4In addition two ends, an end is by parallel resistor R 12And relay J 4Normally closed node J 4After succeed electrical equipment J 4, connect its other end again, and between these two ends cross-over connection one capacitor C 13, in relay J 4Other diode D in parallel 9
D. from a 8End passes through resistance R 20To the P point, at P point and a 9Resistance R in the difference cross-over connection between the end 21, R 22, capacitor C 17, P point order crystallizer UJT 2The e utmost point; Diode D 21Positive pole connects the O point, and negative pole connects the P point, and the O point is write a, connecting resistance P between the end 19Pass through resistance R from the Q point 17After meet diode D respectively 17Positive pole, D 17Negative pole meet P point, connecting resistance R 23To diode D 18Positive pole, D 18Negative pole connect the P point; Between Q point and E point respectively and meet bridge rectifier Z 6, resistance R 14, capacitor C 14, between Q point and F point respectively and meet bridge rectifier Z 7, resistance R 15, between Q point and T point respectively and meet bridge rectifier Z 8, resistance R 16, capacitor C 16Two have pipe D 11Positive pole connects the E point, and negative pole meets W point, diode D 12Positive pole meets a, end, and negative pole meets E point, diode D 13Positive pole connects the F point, and negative pole meets W point, diode D 14Positive pole meets a, end, and negative pole meets F point, diode D 15Positive pole connects the T point, and negative pole meets W point, diode D 16Positive pole meets a, end, and negative pole connects the T point; Between W point and O point, connect a resistance R 18Single crystals pipe UJT 2B 1The utmost point is succeeded electrical equipment J 2To b 2The utmost point passes through resistance R 24After connect capacitor C in parallel respectively 18, voltage-stabiliser tube D 20To a, end, connecting resistance R 23, bridge rectifier Z, to a, end; Z, in addition two termination d 1, d 2Z 6, Z 7, Z 8In addition two ends be to be connected on power supply to give H on the three-phase line of electric coal drill 3, H 4, H 5, H 6, H 7, H 8
2, by the described integration unit of claim 1, it is characterized in that: at the A and the b that connects dihedral connection short-circuit protection circuit of three-phase line 1b 1' between connect resistance R 1With contactor CJ often open node, at the B of three-phase line and meet the b of the short method short-circuit protection circuit of dihedral 2b 2' between connect resistance R 2With contactor CJ often open node.
3, by claim 1 or 2 described integration units, it is characterized in that: transformer is that the employing current density is 2.5A/mm 2About copper cash directly be entangled on the cold-pressed steel iron core.
CN 88217500 1988-09-08 1988-09-08 Integrated device for mining explosion-proof electric-drill transformer Withdrawn CN2041079U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 88217500 CN2041079U (en) 1988-09-08 1988-09-08 Integrated device for mining explosion-proof electric-drill transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 88217500 CN2041079U (en) 1988-09-08 1988-09-08 Integrated device for mining explosion-proof electric-drill transformer

Publications (1)

Publication Number Publication Date
CN2041079U true CN2041079U (en) 1989-07-12

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CN 88217500 Withdrawn CN2041079U (en) 1988-09-08 1988-09-08 Integrated device for mining explosion-proof electric-drill transformer

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CN (1) CN2041079U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104505810A (en) * 2014-11-27 2015-04-08 国家电网公司 Over-current protection circuit of AC electric drill
CN104538931A (en) * 2014-11-27 2015-04-22 国家电网公司 Current foldback circuit of direct current drill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104505810A (en) * 2014-11-27 2015-04-08 国家电网公司 Over-current protection circuit of AC electric drill
CN104538931A (en) * 2014-11-27 2015-04-22 国家电网公司 Current foldback circuit of direct current drill
CN104505810B (en) * 2014-11-27 2018-04-27 国家电网公司 Exchange the current foldback circuit of electric drill

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