CN203269452U - Steady braking circuit for variable amplitudes of single-jib crane - Google Patents

Steady braking circuit for variable amplitudes of single-jib crane Download PDF

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Publication number
CN203269452U
CN203269452U CN 201320155154 CN201320155154U CN203269452U CN 203269452 U CN203269452 U CN 203269452U CN 201320155154 CN201320155154 CN 201320155154 CN 201320155154 U CN201320155154 U CN 201320155154U CN 203269452 U CN203269452 U CN 203269452U
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China
Prior art keywords
contactor
contact
motor
contacts
main
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Expired - Fee Related
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CN 201320155154
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Chinese (zh)
Inventor
汪祖功
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Ma'anshan Port (group) Co Ltd
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Ma'anshan Port (group) Co Ltd
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Abstract

The utility model discloses a steady braking circuit for variable amplitudes of a single-jib crane. The steady braking circuit comprises an electric motor forward rotation AC (alternate current) contactor 6C1, an electric motor reversal rotation AC contactor 6C2, a hydraulic push brake control AC contactor 6C3, an energy-consumption light-brake control AC contactor 6C4, a current-limiting resistor R, a commutation diode DZ, a master controller, an upward stroke limit control switch 1FXW, a downward stroke limit control switch 2FXW and a time relay SJ, wherein the master controller comprises three pairs of contacts including normally closed contacts LK0, amplification control contacts LK1 and amplitude reduction control contacts LK2. The steady braking circuit is subjected to heavy-braking contracting brake after subjected to first-level light braking, so that steady braking for the variable amplitudes of the single-jib crane is achieved, and the normal production is guaranteed.

Description

Single arm support crane amplitude variation gradual braking circuit
Technical field
The utility model relates generally to electronic circuit field, relates in particular to a kind of single arm support crane amplitude variation gradual braking circuit.
Background technology
Single arm support type hoisting crane is as Q5-251 type hoisting crane, since using for many years, due to device performance decay, use grab bucket (fully loaded 5 tons) operation, when changing amplitude, the complete machine shake, the crane arm bob is obvious; During stopping brake, impulsive force increases severely, and the recoil spring normal off splits.After recoil spring changed by the unitized construction of steel plate, rubber plate replace, effect is also not obvious, impact still very large during luffing, therefore the driver loosens drg often in operation, the impact (being unallowed from equipment operation and security standpoint consideration) when reducing braking, in case of emergency situation with reversing braking reach 50~120 times/time, because of reversing braking frequent, only in 1 year, be motor damage (JZR42-8,16 kilowatts, 8 utmost points) 7 times 1~August.
The utility model content
The utility model purpose is exactly in order to improve the defective of above-mentioned technology, a kind of single arm support crane amplitude variation gradual braking circuit to be provided.
The utility model is achieved through the following technical solutions:
single arm support crane amplitude variation gradual braking circuit, it is characterized in that: include power circuit, control circuit, described power circuit includes electrical motor forward AC contactor 6C1, electrical motor counter-rotating AC contactor 6C2, the hydraulic thrust drg is controlled AC contactor 6C3, energy consumption is gently braked and is controlled AC contactor 6C4, hydraulic thrust drg and A, B, connect three main contacts of AC contactor 6C4 between C three phasevoltage input end, motor and A, C phase voltage input end connects two main contacts of AC contactor 6C2, the two ends of the main contact of the AC contactor 6C2 between motor and C phase voltage input end are connected respectively the main contact of AC contactor 6C3 by node, be in series with current-limiting resistance R between two main contacts of AC contactor 6C3, rectifier diode DZ, the two ends of the main contact of AC contactor 6C1 respectively with motor, A phase voltage input end connects, the two ends of another main contact of AC contactor 6C1 respectively with motor, C phase voltage input end connects the end that this contact simultaneously is connected with motor and also is connected with the hydraulic thrust drg, described control circuit includes three parts, and three parts include a master controller altogether, and master controller includes three pairs of contacts and is respectively normally closed contact LK ﹠lt, sub TranNum="61" ﹠gt, 0 ﹠lt, /sub ﹠gt, , amplification is controlled contact LK1, amount of decrease is controlled contact LK2, first is: amplification is controlled contact LK1 and up stroke position-limiting control switch 1FXW, the coil of AC contactor 6C1, control contact LK2 with the amount of decrease of mutually connecting after the secondary contact series connection of AC contactor 6C2, down stroke position-limiting control switch 2FXW, the coil of AC contactor 6C2, the secondary contact parallel connection of AC contactor 6C1 is connected with the secondary contact of AC contactor 6C3 again, second portion is: the coil of time relay sj and AC contactor 6C1 parallel with one another, the secondary contact series connection of 6C2, third part is: normally closed contact LK ﹠lt, sub TranNum="62" ﹠gt, 0 ﹠lt, /sub ﹠gt, with connect with the secondary contact of time relay sj again with the coils from parallel connection of coils of AC contactor 6C4 after the secondary contact of the coil of AC contactor 6C3, AC contactor 6C1,6C2 are connected, above three parts are parallel with one another.
Described single arm support crane amplitude variation gradual braking circuit is characterized in that: the auxiliary contact of described time relay sj is that normally open contact is opened in instantaneous make delay.
The utility model has been set up the one-level energy consumption and has gently been braked on the primary circuit basis, to cushion.
The operation master controller makes LK 1Closure is amplification, makes LK 2Closure is amount of decrease (LK in service 0Disconnect).During parking, the operation master controller is got back to zero-bit, LK 1, LK 2Disconnect, the ac contactor coil dead electricity, main contact disconnects, the motor 6DR power supply that runs out of steam.Simultaneously, LK 0Closure, 6C 1, 6C 2Auxiliary normally closed contact is closed, makes 6C 3Get electronic work.Before brake sticking brake, 6C 3Open contact is closed, sends into direct current (DC) through overcommutation diode DZ to motor and carries out resistance braking, and Here it is, and the first order is gently braked.The size of the light lock torque of the first order is to control by the size that DC current is inputted.The size of direct current (DC) electric current is regulated (R=2.3 in this circuit ± 0.2 Europe) by current-limiting resistance R.Through time-delay in 0.4~0.8 second, the time relay sj open contact disconnected, 6C 3And 6C 4Coil losing electricity, resistance braking finishes, and 6DZ is the dead electricity band-type brake also, carries out second stage recasting moving, and car is checked.
After transformation, luffing part serviceability rate 100%, crane arm is without jumping phenomena, and smooth operation is reliable, without recoil spring fracture and burn-down of electric motor phenomenon, has guaranteed normal production.
The utility model has the advantages that:
The utility model has solved single arm support crane amplitude variation when braking rake bar and has shaken up and down that (each parts tolerance clearance of especially old plant machinery is larger greatly, cause the rake bar impulsive force excessive), during the luffing braking, stationarity is poor, brake by two-stage, namely through after the light braking of one-level, the moving band-type brake of remaking has again been realized single arm support crane amplitude variation gradual braking.
Description of drawings:
Fig. 1 is the main circuit diagram of the primary circuit of prior art.
Fig. 2 is the control circuit figure of the primary circuit of prior art.
Fig. 3 is main circuit diagram of the present utility model.
Fig. 4 is control circuit figure of the present utility model.
The specific embodiment:
as Fig. 3, 4, single arm support crane amplitude variation gradual braking circuit includes power circuit, control circuit, power circuit include electrical motor forward AC contactor 6C1, electrical motor counter-rotating AC contactor 6C2, the hydraulic thrust drg is controlled AC contactor 6C3, energy consumption is gently braked and is controlled AC contactor 6C4, hydraulic thrust drg and A, B, connect three main contacts of AC contactor 6C4, motor and A between C three phasevoltage input end, C phase voltage input end connects two main contacts of AC contactor 6C2, the two ends of the main contact of the AC contactor 6C2 between motor and C phase voltage input end are connected respectively the main contact of AC contactor 6C3 by node, be in series with current-limiting resistance R between two main contacts of AC contactor 6C3, rectifier diode DZ, the two ends of the main contact of AC contactor 6C1 respectively with motor, A phase voltage input end connects, the two ends of another main contact of AC contactor 6C1 respectively with motor, C phase voltage input end connects the end that this contact simultaneously is connected with motor and also is connected with the hydraulic thrust drg, control circuit includes three parts, and three parts include a master controller altogether, and master controller includes three pairs of contacts and is respectively normally closed contact LK ﹠lt, sub TranNum="88" ﹠gt, 0 ﹠lt, /sub ﹠gt, , amplification is controlled contact LK1, amount of decrease is controlled contact LK2, first is: amplification is controlled contact LK1 and up stroke position-limiting control switch 1FXW, the coil of AC contactor 6C1, control contact LK2 with the amount of decrease of mutually connecting after the secondary contact series connection of AC contactor 6C2, down stroke position-limiting control switch 2FXW, the coil of AC contactor 6C2, the secondary contact parallel connection of AC contactor 6C1 is connected with the secondary contact of AC contactor 6C3 again, second portion is: the coil of time relay sj and AC contactor 6C1 parallel with one another, the secondary contact series connection of 6C2, third part is: normally closed contact LK ﹠lt, sub TranNum="89" ﹠gt, 0 ﹠lt, /sub ﹠gt, with connect with the secondary contact of time relay sj again with the coils from parallel connection of coils of AC contactor 6C4 after the secondary contact of the coil of AC contactor 6C3, AC contactor 6C1,6C2 are connected, above three parts are parallel with one another.
The auxiliary contact of time relay sj is that normally open contact is opened in instantaneous make delay.
Fig. 1, the 2nd, the circuit diagram that crane boom increases, amount of decrease drags of prior art before technological transformation, it drags process is to control luffing electrical motor 6DR rotating by control circuit, realizes amplification and the amount of decrease of rake bar.
(1) master controller has three couples of contact: LK 0Be a pair of normally closed contact, operating handle is closed when midway location; LK1 is that amplification is controlled the contact, the closing of contact when operating handle pulls back (other move disconnection) control motor forward (crane arm amplification); LK2 is that amount of decrease is controlled the contact, the closing of contact when operating handle pushes away forward (other move disconnection) control motor reversal (crane arm amount of decrease).
(2) 6C1,6C2 are the motor forward/backward rotation AC contactor.
(3) 6DR is three phase asynchronous motor.
(4) 6DZ is dead electricity band-type brake (getting electric opening) hydraulic thrust drg.
(5) 6PB is frequency sensitive trheostat (being used for the starting of electrical motor).
(6) 1FXW is crane arm up stroke position-limiting control switch, and 2FXW is crane arm down stroke position-limiting control switch.
(7) normally closed contact of 6C1 and 6C2 is the motor forward/backward rotation block contact.
Fig. 2 is the circuit diagram that crane boom of the present utility model increases, amount of decrease drags after technological transformation.
Left two of power circuit be that contactless switch 6C1 main contact, right two are contactless switch 6C2 main contact, below three be contactless switch 6C4 main contact, the power circuit right side up and down two control energy consumptions gently to brake main contact be the 6C3 main contact.Left figure is the main contact of power loop AC contactor, and right figure is the secondary contact of power loop AC contactor.LK 0, LK1, LK2 be the contact of master controller.
(1) LK 0, LK1, LK2,6DR, 6DZ, 6PB, 1FXW, 2FXW be the same.
(2) 6C3 is that the hydraulic thrust maker is controlled AC contactor, and 6C4 is that energy consumption is gently braked the control AC contactor.
(3) SJ is time relay, and the auxiliary contact of SJ is that normally open contact is opened in instantaneous make delay.
(4) DZ is rectifier diode, and R is current-limiting resistance.
Embodiment
Original luffing brake sticking brake is set up one-level gently automatic, press that Fig. 3,4 circuit connect, install, debugging, to realize first order buffer-braking.The time of the light braking of the size of lock torque and the first order, should carry out design alternative according to different equipment and situation:
The capacity of current-limiting resistance and resistance;
The capacity of rectification diode and parameter;
The braking time domain of the light braking of the first order is set, and is the setting by the time of time relay sj open contact dead electricity Time Delay Opening, determines the end time domain (time-delay in 0.4~0.8 second) of light braking, and the moving band-type brake of second stage recasting is immediately checked the crane arm luffing.

Claims (2)

1. single arm support crane amplitude variation gradual braking circuit, it is characterized in that: include power circuit, control circuit, described power circuit includes electrical motor forward AC contactor 6C1, electrical motor counter-rotating AC contactor 6C2, the hydraulic thrust drg is controlled AC contactor 6C3, energy consumption is gently braked and is controlled AC contactor 6C4, hydraulic thrust drg and A, B, connect three main contacts of AC contactor 6C4 between C three phasevoltage input end, motor and A, C phase voltage input end connects two main contacts of AC contactor 6C2, the two ends of the main contact of the AC contactor 6C2 between motor and C phase voltage input end are connected respectively the main contact of AC contactor 6C3 by node, be in series with current-limiting resistance R between two main contacts of AC contactor 6C3, rectifier diode DZ, the two ends of the main contact of AC contactor 6C1 respectively with motor, A phase voltage input end connects, the two ends of another main contact of AC contactor 6C1 respectively with motor, C phase voltage input end connects the end that this contact simultaneously is connected with motor and also is connected with the hydraulic thrust drg, described control circuit includes three parts, and three parts include a master controller altogether, and master controller includes three pairs of contacts and is respectively normally closed contact LK ﹠lt, sub TranNum="116" ﹠gt, 0 ﹠lt, /sub ﹠gt, , amplification is controlled contact LK1, amount of decrease is controlled contact LK2, first is: amplification is controlled contact LK1 and up stroke position-limiting control switch 1FXW, the coil of AC contactor 6C1, control contact LK2 with the amount of decrease of mutually connecting after the secondary contact series connection of AC contactor 6C2, down stroke position-limiting control switch 2FXW, the coil of AC contactor 6C2, the secondary contact parallel connection of AC contactor 6C1 is connected with the secondary contact of AC contactor 6C3 again, second portion is: the coil of time relay sj and AC contactor 6C1 parallel with one another, the secondary contact series connection of 6C2, third part is: normally closed contact LK ﹠lt, sub TranNum="117" ﹠gt, 0 ﹠lt, /sub ﹠gt, with connect with the secondary contact of time relay sj again with the coils from parallel connection of coils of AC contactor 6C4 after the secondary contact of the coil of AC contactor 6C3, AC contactor 6C1,6C2 are connected, above three parts are parallel with one another.
2. single arm support crane amplitude variation gradual braking circuit according to claim 1, it is characterized in that: the auxiliary contact of described time relay sj is that normally open contact is opened in instantaneous make delay.
CN 201320155154 2013-03-30 2013-03-30 Steady braking circuit for variable amplitudes of single-jib crane Expired - Fee Related CN203269452U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320155154 CN203269452U (en) 2013-03-30 2013-03-30 Steady braking circuit for variable amplitudes of single-jib crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320155154 CN203269452U (en) 2013-03-30 2013-03-30 Steady braking circuit for variable amplitudes of single-jib crane

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CN203269452U true CN203269452U (en) 2013-11-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108483167A (en) * 2018-05-22 2018-09-04 苏州江南嘉捷电梯有限公司 A kind of elevator single armed band-type brake test device and method
CN110526133A (en) * 2019-08-22 2019-12-03 中船绿洲镇江船舶辅机有限公司 A kind of high low speed automatic switchover system and its switching method for rescue boat removal process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108483167A (en) * 2018-05-22 2018-09-04 苏州江南嘉捷电梯有限公司 A kind of elevator single armed band-type brake test device and method
CN108483167B (en) * 2018-05-22 2024-02-06 苏州江南嘉捷电梯有限公司 Elevator single-arm band-type brake testing device and method
CN110526133A (en) * 2019-08-22 2019-12-03 中船绿洲镇江船舶辅机有限公司 A kind of high low speed automatic switchover system and its switching method for rescue boat removal process
CN110526133B (en) * 2019-08-22 2024-02-02 中船绿洲镇江船舶辅机有限公司 High-low speed automatic switching system and switching method for rescue boat recycling process

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C14 Grant of patent or utility model
GR01 Patent grant
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: 20131106

Termination date: 20160330