CN206820537U - A kind of crane and its DC power-supply system with emergency service function - Google Patents
A kind of crane and its DC power-supply system with emergency service function Download PDFInfo
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- CN206820537U CN206820537U CN201720733643.6U CN201720733643U CN206820537U CN 206820537 U CN206820537 U CN 206820537U CN 201720733643 U CN201720733643 U CN 201720733643U CN 206820537 U CN206820537 U CN 206820537U
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- crane
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Abstract
A kind of crane and its DC power-supply system with emergency service function are the utility model is related to, wherein DC power-supply system includes rectifier and the dc bus for being powered to crane, and dc bus connects power network by rectifier；The electric power system also includes energy-storage units, charge and discharge switch branch road and the charge/discharge unit for control electric current flow direction, and energy-storage units, charge and discharge switch branch road and charge/discharge unit connect dc bus after being connected；Charge and discharge switch branch road includes charging paths and emergent discharge paths, and string is provided with charging resistor and charge switch in charging paths, and string is provided with emergency button in emergent discharge paths.By the way that regenerative resource caused by crane normal work is transformed into power storage in energy-storage units in the utility model, when occur crane power off suddenly and have weight suspension in the air, individually emergency power supply is provided by energy-storage units to crane, weight is rolled back on home in time, is inherently eliminated potential safety hazard.
Description
Technical field
A kind of crane and its DC power-supply system with emergency service function are the utility model is related to, belongs to engineering machine
Tool technical field.
Background technology
As science and technology is constantly updated, the expansion of commercial production scale and the raising of automaticity, promote large-scale
Or the demand of high speed crane constantly increases.Accordingly, application of the crane during modern production is more and more wider,
Higher requirement is it is also proposed to energy consumption and reliability.
Crane is during handling weight, if meeting situation about powering off suddenly, it is hidden to have serious safety
Suffer from, especially in the case where weight is also hung in the air, it is most likely that cause serious accident.When crane powers off suddenly
And when having weight suspension in the air, common practice checks main power source and control loop, while sets warning sign or warning
Line, to prevent someone from passing through under weight.But maintenance main power source and control loop need to take some time, and set
Warning sign or warning line are also only that part can be prevented to observe the people of safety regulation to cross hazardous area, can not be in time and from basic
On eliminate safe hidden trouble.Therefore, when crane powers off suddenly and has weight suspension in the air, effective meet an urgent need is taken to arrange rapidly
Apply, emergency power supply is provided to crane, crane is temporarily recovered crane capacity, timely removal is resuspended the high-level weight of extension and shown
Obtain particularly important.
In addition, hoisting machinery action process is to complete several meters to tens meters of vertical displacement under operating mode with carrying, thus causing
Potential energy change and formed regeneration energy be sizable, there is larger energy-saving potential.It is worked in order to eliminate crane
The caused renewable sources of energy in journey, traditional method are will to regenerate energy expenditure in the resistors using brake unit.Such as Fig. 1 institutes
Show, resistance unit is set by being gone here and there in the power supply buses of crane, when crane, which works, produces regeneration energy, power supply buses electricity
Pressure rises, and when reaching resistance unit release threshold value, is slatterned by resistance in the form of heat energy, causes huge energy wave
Take.
Publication No. is that the A of CN 102718146 Chinese patent document discloses a kind of overhead traveling crane electrical-mechanical system, is being risen
In the heavy-duty machine course of work, by power storage caused by the executing agency of crane in energy-storage units, and when crane works
From energy-storage units to executing agency's auxiliary power supply of crane, the load of sharing system, by the way that the executing agency of crane is produced
Raw power storage is got up and provides auxiliary electric energy again for executing agency, effectively reduces the energy consumption of crane.But due to
Energy-storage units in the electrical system are mainly used in and dc bus cooperation, it is impossible to are individually used for landing weight, therefore work as
Run into crane to power off suddenly and have weight suspension this emergency in the air, it is impossible to be individually for crane and emergency power supply is provided
Come the weight that lands.In addition, energy-storage units are chronically at charge-discharge behavior, the energy-storage units life-span is shorter and efficiency for charge-discharge not
It is high.
Utility model content
The purpose of this utility model is to provide a kind of crane and its DC power-supply system with emergency service function, uses
In solve when heavy-duty machine powers off suddenly and have weight suspension in the air this it is in emergency circumstances timely provide emergency power supply for crane,
It is inherently eliminated potential safety hazard this technical problem.
Supplied in order to solve the above technical problems, the utility model provides a kind of crane direct current with emergency service function
Electric system, including rectifier and the dc bus for being powered to crane, the dc bus are connected by the rectifier
Get access to grid；The DC power-supply system also includes energy-storage units, charge and discharge switch branch road and the charge and discharge for control electric current flow direction
Electric unit, the energy-storage units, charge and discharge switch branch road and charge/discharge unit are connected on the dc bus after being connected；
The charge and discharge switch branch road includes charging paths and emergent discharge paths, and string is provided with charging resistor and filled in the charging paths
Electric switch, string is provided with emergency button in the emergent discharge paths.
Further, the energy-storage units are batteries.
Further, the charge/discharge unit is bidirectional thyristor.
The utility model additionally provides a kind of crane with emergency service function, including DC power-supply system, and this is straight
Stream electric power system includes rectifier and the dc bus for being powered to crane, and the dc bus passes through the rectifier
Connect power network；The DC power-supply system also includes energy-storage units, charge and discharge switch branch road and filling for control electric current flow direction
Discharge cell, the energy-storage units, charge and discharge switch branch road and charge/discharge unit are connected to the dc bus after being connected
On；The charge and discharge switch branch road includes charging paths and emergent discharge paths, and string is provided with charging resistor in the charging paths
And charge switch, string is provided with emergency button in the emergent discharge paths.
Further, the energy-storage units are batteries.
Further, the charge/discharge unit is bidirectional thyristor.
The beneficial effects of the utility model are：
In crane course of normal operation, regenerative resource is transformed into electric energy as caused by crane, passes through the branch that charges
Road is stored in energy-storage units, and due in charging paths string be provided with charging resistor, effectively limit charging current it is excessive to prevent
Only burn out energy-storage units, especially energy-storage units electric discharge is more cause voltage very low in the case of, larger charging current pole
Easy burn-out energy-storage units；Power off suddenly when there is crane and have weight suspension in the air, the emergent discharge circuit of control closure, by
Energy-storage units individually provide emergency power supply to crane, crane is temporarily recovered hoisting function, weight is rolled back into peace in time
On all positon, potential safety hazard is inherently eliminated.
Further, by controlling the conducting direction of bidirectional thyristor, so as to ensure that when being charged to energy-storage units, fill
Electric current can only flow to energy-storage units from dc bus；When providing emergency power supply to crane by energy-storage units, discharge current
Dc bus can only be flowed to from energy-storage units.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of traditional crane feed system；
Fig. 2 is the circuit theory diagrams of the crane DC power-supply system with emergency service function.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment describes in detail to the utility model.
The utility model provides a kind of crane with emergency service function, and the crane includes direct current supply system
System, as shown in Fig. 2 the DC power-supply system includes rectifier, dc bus, energy-storage units, charge and discharge switch branch road and use
In the charge/discharge unit of control electric current flow direction.Wherein, dc bus connects power network to be provided normally to crane by rectifier
Electric energy during work；Energy-storage units, charge and discharge switch branch road and charge/discharge unit are connected on dc bus after being connected；Put
Electric switch branch road includes charging paths and emergent discharge paths, and charging paths and emergent discharge paths are connected in parallel；Emergent electric discharge
String is provided with emergency button K1 in branch road, and string is provided with charging resistor R1 and charge switch K2 in charging paths.
The frequency converter of driving crane work is arranged on dc bus, and dc bus is provided by frequency converter to crane
Electric energy.In crane course of normal operation, the alternating current provided by power network supplies electricity to dc bus after rectifier rectification,
To ensure the reliable of direct current and stably.Dc bus provides normal work power supply by the frequency converter of crane to crane,
Now charge switch K2 is closed, and emergency button K1 disconnects, gravitional force that crane is formed in the course of the work, mechanical kinetic energy etc.
Rechargeable energy raises DC bus-bar voltage by frequency converter, when DC bus-bar voltage reaches charge threshold, begins through and fills
Electric branch road is charged to energy-storage units, energy-storage units absorption and regeneration energy, serves good energy-saving effect.By charging
String sets charging resistor R1 in branch road, effectively prevent the phenomenon that energy-storage units are burnt out when charging current is excessive, is especially storing up
Can unit just discharge complete voltage it is relatively low in the case of, larger charging current easily burns out energy-storage units.Work as electric network fault
Or when disconnecting, heavy-duty machine can be caused to power off suddenly, it is rapid to disconnect charge switch K2 if now just have weight suspension in the air,
Emergency button K1 is closed, discharge paths of meeting an urgent need conducting, energy-storage units provide emergency service power supply by dc bus to crane,
Weight is rolled back the homes such as ground by crane in time using the emergency service power supply, effectively prevent because weight is hung
Security incident caused by the air.
It is pointed out that in crane course of normal operation, i.e., without emergency when, emergent discharge paths are located all the time
In off-state, energy-storage units need not power to crane or other equipment, only when emergency occurs, urgent electric discharge branch
Road is just turned on, and electric discharge energy supply is individually carried out by energy-storage units.In crane course of normal operation, charging paths are closed to energy storage
Unit charges, and in order to prevent long-term lasting charging from causing energy-storage units to damage, when energy-storage units charging complete, can also control disconnected
Charge switch K2 is opened, after the voltage landing in energy-storage units to certain setting value either disconnects certain time, then is controlled
Charge switch K2 is closed, to prevent energy-storage units from occurring occurring showing for not enough power supply when power shortage causes in case of emergency to use
As.The charge/discharge unit set between charging paths and emergent discharge paths and dc bus is mainly used in the unidirectional of control electric current
Conducting, it is, when in the case of crane normal work, charge/discharge unit ensures that electric current can only flow to energy storage list from bus
Member；In emergent discharging circuit conduction, charge/discharge unit ensures that electric current can only flow to bus from energy-storage units.
Preferably, above-mentioned energy-storage units selection is batteries, naturally it is also possible to is selected as other storages such as super capacitor
Can device.Charge/discharge unit can select for bidirectional thyristor either other unidirectional gating devices, due to charge/discharge unit
Device selects and specific control method belongs to prior art, and here is omitted.
Claims (6)
1. a kind of crane DC power-supply system with emergency service function, it is characterised in that including rectifier and be used for
The dc bus powered to crane, the dc bus connect power network by the rectifier；The DC power-supply system also wraps
Include energy-storage units, charge and discharge switch branch road and the charge/discharge unit for control electric current flow direction, the energy-storage units, discharge and recharge
Switching branches and charge/discharge unit are connected to after being connected on the dc bus；The charge and discharge switch branch road includes charging
Branch road and emergent discharge paths, string is provided with charging resistor and charge switch in the charging paths, in the emergent discharge paths
String is provided with emergency button.
2. the crane DC power-supply system according to claim 1 with emergency service function, it is characterised in that described
Energy-storage units are batteries.
3. the crane DC power-supply system according to claim 1 or 2 with emergency service function, it is characterised in that
The charge/discharge unit is bidirectional thyristor.
4. a kind of crane with emergency service function, it is characterised in that including DC power-supply system, the DC power-supply system
Including rectifier and the dc bus for being powered to crane, the dc bus connect power network by the rectifier；
The DC power-supply system also includes energy-storage units, charge and discharge switch branch road and the charge/discharge unit for control electric current flow direction,
The energy-storage units, charge and discharge switch branch road and charge/discharge unit are connected on the dc bus after being connected；It is described to fill
Discharge switch branch road includes charging paths and emergent discharge paths, and string is opened provided with charging resistor and charging in the charging paths
Close, string is provided with emergency button in the emergent discharge paths.
5. the crane according to claim 4 with emergency service function, it is characterised in that the energy-storage units are storage
Battery pack.
6. the crane with emergency service function according to claim 4 or 5, it is characterised in that the discharge and recharge list
Member is bidirectional thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720733643.6U CN206820537U (en) | 2017-06-22 | 2017-06-22 | A kind of crane and its DC power-supply system with emergency service function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720733643.6U CN206820537U (en) | 2017-06-22 | 2017-06-22 | A kind of crane and its DC power-supply system with emergency service function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206820537U true CN206820537U (en) | 2017-12-29 |
Family
ID=60761365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720733643.6U Expired - Fee Related CN206820537U (en) | 2017-06-22 | 2017-06-22 | A kind of crane and its DC power-supply system with emergency service function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206820537U (en) |
-
2017
- 2017-06-22 CN CN201720733643.6U patent/CN206820537U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20171229 |