CN102020203B - Electric control method for lowering heavy object in power failure of quenching crane - Google Patents
Electric control method for lowering heavy object in power failure of quenching crane Download PDFInfo
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- CN102020203B CN102020203B CN2010105559057A CN201010555905A CN102020203B CN 102020203 B CN102020203 B CN 102020203B CN 2010105559057 A CN2010105559057 A CN 2010105559057A CN 201010555905 A CN201010555905 A CN 201010555905A CN 102020203 B CN102020203 B CN 102020203B
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- speed regulating
- regulating device
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- 238000010791 quenching Methods 0.000 title claims abstract description 24
- 230000000171 quenching effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 238000005381 potential energy Methods 0.000 claims abstract description 5
- 238000007600 charging Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
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- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses an electric control method for lowering a heavy object when a quenching crane is powered off, and relates to an electric control system of the quenching crane. The invention solves the problem that the crane can quickly and safely put large-sized workpieces into solution when the power grid is in power failure. The invention is characterized in that: the electric control method is completed by an electric control system consisting of an AC voltage and speed regulating device, a motor, a DC voltage and speed regulating device, a charger, a logic control device, a storage battery, a lifting resistor and a brake; when the quenching crane runs upwards, the AC voltage and speed regulating device controls the motor to work, and when the quenching crane runs downwards, the DC voltage and speed regulating device controls the motor to work; when the power grid is electrified, the logic control device controls the charger to charge the storage battery pack; when the power grid is powered off, the logic control device controls the motor to operate and opens the brake, and the lifting resistor consumes the descending potential energy.
Description
Technical field
Invention belongs to the elevator machinery electric control system, specially refer to a kind of can be when grid power blackout safety transfer the electric control method of the quenching crane of weight.
Background technology
Quenching crane is the special purpose crane in the Technology for Heating Processing, has fast down descending mechanism, and workpiece immerses in the solution soon simultaneously very much to guarantee to be quenched.When oil bath is quenched, can be on fire when workpiece contact solution, immersing the interior fire of solution can extinguish.Therefore require workpiece to be put into solution with the fastest speed.Even if grid power blackout also requires rapidly workpiece to be put into solution.
Present way is:
1. electrical network has a power failure suddenly when hoisting crane is quenching operation, leans on artificial, pneumatic or opens the support drg with other method crawl, and crawl is transferred workpiece at a slow speed.This method of transferring workpiece is slower and dangerous, and particularly large-scale workpiece and stock workpiece need the long period, also need take fire protection when therefore often large-scale workpiece quenches.
2. brake rubber block and brake wheel attrition fall on the drg because potential energy relies on fully, and the brake rubber block of drg weares and teares with brake wheel and all compares seriously.
3. longer because of the time of transferring workpiece, the very difficult quenching quality that guarantees workpiece might make workpiece scrap.
Summary of the invention
The objective of the invention is to overcome the deficiency of above prior art, make improvements, transfer the electric-control method of weight when providing a kind of quenching crane to have a power failure, when grid power blackout, can fast and safely large-scale workpiece be put into solution.
Technical scheme of the present invention is achieved in that
Transfer the electric-control method of weight when a kind of quenching crane has a power failure, it is characterized in that: the electric control system that said electric-control method is made up of AC pressure-speed regulating device, electrical motor, DC pressure-speed regulating device, charger, logic control device, battery pack, the resistor that hoists, drg is accomplished; When quenching crane rises operation, control said electrical motor work, when quenching crane descends operation, control said machine operation by said DC pressure-speed regulating device by said AC pressure-speed regulating device; When electrical network had electricity, said logic control device was controlled said charger to said battery charging; When grid cut-off, said logic control device is controlled said motor operation and is opened said drg, by the said consumed decline potential energy that hoists.
Method to said battery charging is: at first by rectifier transformer the AC380V line voltage is become the low pressure that charging needs; When detecting accumulator battery voltage, monitoring means CDB is lower than the setting value lower limit; Contactless switch 6KM coil is switched on, and system begins charging, is higher than the setting value upper limit when monitoring means CDB detects accumulator battery voltage; Contactless switch 6KM coil is opened, and system stops charging.
When grid cut-off, the control method of said logic control device is: " transferring affirmation " and " main hoisting " switch that at first closes, and 3KC connects, and carries out and transfers preparation; Press " transferring button ", 4KC connects, 1KC connects, 4KM 7KM connects; 4KM is switched to the direct current (DC) of the main electrical motor that hoists, and motor stator flows through constant DC stream; 7KM is switched to the alternating current of drg, releasing of brake.
Said direct current (DC) will become the alternating current of 50HZ from the direct current (DC) that battery pack is come by inverter, and through step-up transformer voltage risen to AC380V.
Principle of work of the present invention:
Electrical network has a power failure suddenly when hoisting crane is quenching operation, utilizes energy stored to inject constant electric current, the electronic drg of opening for the stator of driving motor; The workpiece by gravity begins to descend; The drive motor rotation, the rotor loop cutting magnetic line produces electromotive force and electric current and produces lock torque thus; When lock torque and gravitational equilibrium, workpiece is transferred with stable speed.The workpiece of rated weight can be transferred so that command speed is stable.
The present invention and prior art relatively have the following advantages:
1, before quenching, store enough electric energy, electrical network has a power failure suddenly when hoisting crane is quenching operation, and energy stored capable of using is transferred workpiece.Drg is opened fully when 2, transferring workpiece, has avoided the wearing and tearing of brake wheel and brake rubber block.3, it is fast to transfer work speed, and continuously steadily, has improved workpiece quenching quality.4, system is simple, and link is few, and fault rate is low, and the equipment of being convenient to uses and safeguards.
Description of drawings
Fig. 1 is an electric control system line chart of the present invention;
Fig. 2 is charging control principle figure;
Fig. 3 is that direct current becomes the alternating-current electric schematic diagram;
Fig. 4 is the logic control circuit;
Fig. 5 is the external interconnecting wiring diagram of logic control device.
The specific embodiment
Specify representative instance of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1; Transfer the electric-control method of weight when a kind of quenching crane has a power failure, it is characterized in that: the electric control system that said electric-control method is made up of AC pressure-speed regulating device 1, electrical motor 2, DC pressure-speed regulating device 3, charger 4, logic control device 5, battery pack 6, the resistor 7 that hoists, drg 8 is accomplished; When quenching crane rises operation, by said electrical motor 2 work of said AC pressure-speed regulating device 1 control, when quenching crane descends operation, by said motor 2 work of said DC pressure-speed regulating device 3 controls; When electrical network had electricity, the said charger 4 of said logic control device 5 controls was to said battery pack 6 chargings; When grid cut-off, the operation of the said motor 2 of said logic control device 5 controls is also opened said drg 8, consumes the decline potential energy by the said resistor 7 that hoists.
As shown in Figure 2; To said battery pack 6 electrically-charged methods be: at first by rectifier transformer 9 the AC380V line voltage is become the low pressure that charging needs, be lower than the setting value lower limit when monitoring means CDB detects battery pack 6 voltages, contactless switch 6KM coil is switched on; System begins charging; Be higher than the setting value upper limit when monitoring means CDB detects battery pack 6 voltages, contactless switch 6KM coil is opened, and system stops charging.
As shown in Figure 4, when grid cut-off, the control method of said logic control device 5 is: " transferring affirmation " and " main hoisting " switch that at first closes, and 3KC connects, and carries out and transfers preparation; Press " transferring button ", 4KC connects, 1KC connects, 4KM 7KM connects; 4KM is switched to the direct current (DC) of the main electrical motor that hoists, and motor stator flows through constant DC stream; 7KM is switched to the alternating current of drg, releasing of brake.
As shown in Figure 3, said direct current (DC) will become the alternating current of 50HZ from the direct current (DC) that battery pack 6 is come by inverter 10, and through step-up transformer 11 voltage risen to AC380V.
Claims (1)
1. transfer the electric-control method of weight when a quenching crane has a power failure, it is characterized in that: the electric control system that said electric-control method is made up of AC pressure-speed regulating device (1), electrical motor (2), DC pressure-speed regulating device (3), charger (4), logic control device (5), battery pack (6), the resistor that hoists (7), drg (8) is accomplished; When quenching crane rises operation, control said electrical motor (2) work, when quenching crane descends operation, control said motor (2) work by said DC pressure-speed regulating device (3) by said AC pressure-speed regulating device (1); When electrical network had electricity, said logic control device (5) was controlled said charger (4) and is charged to said battery pack (6); When grid cut-off, said logic control device (5) is controlled the operation of said motor (2) and is opened said drg (8), consumes the decline potential energy by the said resistor that hoists (7); The electrically-charged method of said battery pack (6) is: at first by rectifier transformer (9) the AC380V line voltage is become the low pressure that charging needs; When detecting battery pack (6) voltage, monitoring means CDB is lower than the setting value lower limit; Contactless switch 6KM coil is switched on, and system begins charging, is higher than the setting value upper limit when monitoring means CDB detects battery pack (6) voltage; Contactless switch 6KM coil is opened, and system stops charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105559057A CN102020203B (en) | 2010-11-19 | 2010-11-19 | Electric control method for lowering heavy object in power failure of quenching crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105559057A CN102020203B (en) | 2010-11-19 | 2010-11-19 | Electric control method for lowering heavy object in power failure of quenching crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102020203A CN102020203A (en) | 2011-04-20 |
| CN102020203B true CN102020203B (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105559057A Expired - Fee Related CN102020203B (en) | 2010-11-19 | 2010-11-19 | Electric control method for lowering heavy object in power failure of quenching crane |
Country Status (1)
| Country | Link |
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| CN (1) | CN102020203B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583158A (en) * | 2012-02-29 | 2012-07-18 | 上海共久电气有限公司 | Electric control system for quenching crane |
| CN103058061A (en) * | 2012-12-31 | 2013-04-24 | 太原重工股份有限公司 | Quenching crane and bidirectional speed adjusting system thereof |
| CN103204436B (en) * | 2013-04-09 | 2014-08-20 | 江苏万富安机械有限公司 | Emergency brake circuit of starter |
| CN104868818B (en) * | 2015-05-29 | 2017-10-20 | 上海共久电气有限公司 | A kind of method and device for realizing quenching crane speed governing |
| CN106976803A (en) * | 2017-05-10 | 2017-07-25 | 河南新科起重机股份有限公司 | Governing system and quenching crane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504399A (en) * | 2002-12-04 | 2004-06-16 | 上海振华港口机械（集团）股份有限公 | Rubber-tyred gantry container crane using supercapacitor |
| CN1843885A (en) * | 2006-03-21 | 2006-10-11 | 牡丹江建工机械有限责任公司 | Slewing normally disengaged brake circuit of tower crane having emergent braking function in power turn-off situation |
| CN101143688A (en) * | 2007-09-21 | 2008-03-19 | 沈阳重型机械集团有限责任公司 | Quenching bridge type crane brake-loosing mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3896258B2 (en) * | 2001-04-25 | 2007-03-22 | 株式会社日立製作所 | Automotive power supply |
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2010
- 2010-11-19 CN CN2010105559057A patent/CN102020203B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504399A (en) * | 2002-12-04 | 2004-06-16 | 上海振华港口机械（集团）股份有限公 | Rubber-tyred gantry container crane using supercapacitor |
| CN1843885A (en) * | 2006-03-21 | 2006-10-11 | 牡丹江建工机械有限责任公司 | Slewing normally disengaged brake circuit of tower crane having emergent braking function in power turn-off situation |
| CN101143688A (en) * | 2007-09-21 | 2008-03-19 | 沈阳重型机械集团有限责任公司 | Quenching bridge type crane brake-loosing mechanism |
Non-Patent Citations (2)
| Title |
|---|
| 张三豹等.变频调速控制的淬火起重机.《起重运输机械》.2008,(第11期),第43-45页. * |
| 王志勇.淬火起重机电控系统的分析和研究.《起重运输机械》.2007,(第07期),第68-69页. * |
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| Publication number | Publication date |
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| CN102020203A (en) | 2011-04-20 |
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