CN208150845U - Electric block with simple open-phase protection circuit - Google Patents
Electric block with simple open-phase protection circuit Download PDFInfo
- Publication number
- CN208150845U CN208150845U CN201820290355.2U CN201820290355U CN208150845U CN 208150845 U CN208150845 U CN 208150845U CN 201820290355 U CN201820290355 U CN 201820290355U CN 208150845 U CN208150845 U CN 208150845U
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- Prior art keywords
- phase
- liter
- decentralization
- contactor
- button
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Abstract
The utility model relates to the electric blocks with simple open-phase protection circuit, including three-phase conic rotor braking motor, reel, reduction gearbox, control cabinet, suspension hook, control button and operation circuit；Operation circuit includes main circuit, control circuit and open-phase protection circuit, and main circuit includes three phase mains, breaker, hangs a liter contactor, decentralization contactor and three-phase conic rotor braking motor；The three-phase windings of three-phase conic rotor braking motor are triangle connection；Control circuit includes hanging liter control circuit and decentralization control circuit；Open-phase protection circuit includes capacitor C1, C2, C3 and relay.The utility model can three-phase conic rotor braking motor to electric block carry out effective open-phase protection, structure is simple, the operation is stable.
Description
Technical field
The utility model relates to technical field of crane equipment, more particularly to the electric block with simple open-phase protection circuit.
Background technique
Electric block is widely used in lifting weight, generally the three-phase conic rotor braking motor band by having brake function
It is dynamic, the components such as contactor, limiter, operation button are typically provided in operating circuit.In use, usually due to supply lines
The reasons such as road poor contact cause certain one-phase open circuit in three-phase line, cause three-phase conic rotor braking motor to burn, make electricity
Dynamic cucurbit cisco unity malfunction.
Utility model content
The utility model overcomes the deficiencies in the prior art, provides a kind of electronic calabash of simple open-phase protection circuit of band
Reed, can three-phase conic rotor braking motor to electric block carry out effective open-phase protection, and structure is simple, work is steady
It is fixed.
The utility model is achieved through the following technical solutions：
Electric block with simple open-phase protection circuit, including three-phase conic rotor braking motor, reel, reduction gearbox, control
Case, suspension hook, control button and operation circuit processed；The three-phase conic rotor braking motor is set to reel one end, and reduction gearbox is set to
The reel other end, control cabinet are set to three-phase conic rotor braking outside motor, and suspension hook is connected by wirerope with reel；The control
Button processed hangs a liter button, normally opened decentralization button and normally closed stop button equipped with normally opened；
The operation circuit includes main circuit, control circuit and open-phase protection circuit；The main circuit include three phase mains,
Breaker hangs a liter contactor, decentralization contactor and three-phase conic rotor braking motor；The input terminal of the breaker is separately connected
L1 phase, L2 phase and the L3 phase of three phase mains；It is described hang liter contactor for control three-phase conic rotor braking motor rotating forward hang liter,
One end of three of them main contacts is separately connected three output ends of breaker, and the other end is separately connected three-phase conic rotor braking electricity
Three input terminals of machine；The decentralization contactor is for controlling the decentralization of three-phase conic rotor braking motor reversal, three of them main touching
One end of point is separately connected three output ends of breaker, and the other end be separately connected three-phase conic rotor braking motor three are defeated
Enter end；
The control circuit includes hanging liter control circuit and decentralization control circuit；
It is described hang L3 phase that liter control circuit includes the breaker output end being sequentially connected in series, it is normally opened hang a liter button, decentralization connects
Normally closed second auxiliary contact of tentaculum, the L2 phase for hanging a liter contactor coil, normally closed stop button and breaker output end；
The decentralization control circuit includes the L1 phase of the breaker output end being sequentially connected in series, normally opened decentralization button, hangs and liter connect
Normally closed second auxiliary contact of tentaculum, the L2 phase for transferring contactor coil, normally closed stop button and breaker output end；
The three-phase windings of the three-phase conic rotor braking motor are triangle connection；
The open-phase protection circuit includes capacitor C1, C2, C3 and relay；One end phase of described capacitor C1, C2, C3
One end of relay coil is connected after connecting, the other end of capacitor C1, C2, C3 are separately connected three-phase conic rotor braking electricity
Three input terminals of machine；The capacity of described capacitor C1, C2, C3 are identical；The other end of the relay coil connects three-phase electricity
The zero curve in source, normally closed first contact of the relay and the normally opened third auxiliary contact for hanging liter contactor be serially connected after both ends
Hang that liter button is in parallel self-locking with normally opened, normally closed second contact of the relay and the normally opened third auxiliary contact phase of decentralization contactor
Mutually the both ends after series connection and normally opened decentralization button are in parallel self-locking；
A liter contactor, decentralization contactor, capacitor C1, C2, C3 and the relay of hanging is set in control cabinet.
Further, be equipped with outside the reduction gearbox for control suspension hook hang rise and under be placed on the self-braking limit of extreme position
Position device, the limiter and reduction gearbox transmission connection；The limiter is equipped with normally closed upper limit travel switch and normally closed lower bound range is opened
It closes, the normally closed upper limit travel switch, which is series at, to be hung in liter control circuit, and normally closed lower bound range switch is series at decentralization control electricity
Lu Zhong.When normally closed upper limit travel switch or normally closed lower bound range switch motion, normally-closed contact is disconnected, and a liter control electricity is hung in cutting
Road or decentralization control circuit, hang liter contactor or decentralization contactor disconnects cutting main circuit, and three-phase conic rotor braking motor stops
Rotation stop is dynamic.
The utility model has the beneficial effects that：Open-phase protection circuit is formed using three capacitors and relay, by relay
A liter button parallel connection, normally closed second contact of relay and decentralization control are hung with the normally opened of liter control circuit is hung in normally closed first contact of device
The normally opened decentralization button of circuit processed is in parallel, can the three-phase conic rotor braking motor to electric block carry out effective phase shortage guarantor
Shield, circuit structure is simple, the operation is stable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
As shown in Fig. 1~2, the embodiments of the present invention, the electric block with simple open-phase protection circuit, including three-phase
Conic rotor braking motor M, reel 1, reduction gearbox 2, control cabinet 3, suspension hook 4, control button 5 and operation circuit；The three-phase cone
Shape rotor brake motor M is set to 1 one end of reel, and reduction gearbox 2 is set to the other end of reel 1, and control cabinet 3 is set to three-phase cone rotor
Outside braking motor M, suspension hook 4 is connected by wirerope 6 and reel 1；The control button 5 be equipped with it is normally opened hang a liter button SB1, often
Open decentralization button SB2 and normally closed stop button SB3；
The operation circuit includes main circuit, control circuit and open-phase protection circuit；The main circuit include three phase mains,
Circuit breaker Q F, a liter contactor KM1, decentralization contactor KM2 and three-phase conic rotor braking motor M are hung；The circuit breaker Q F's is defeated
Enter L1 phase, L2 phase and L3 phase that end is separately connected three phase mains；Liter contactor KM1 that hangs is for controlling three-phase cone rotor system
Liter is hung in dynamic motor M rotating forward, one end of three of them main contacts KM1-1 is separately connected three output ends of circuit breaker Q F, the other end point
Not Lian Jie three-phase conic rotor braking motor M three input terminals；The decentralization contactor KM2 is for controlling three-phase cone rotor
Braking motor M reversion decentralization, one end of three of them main contacts KM2-1 is separately connected three output ends of circuit breaker Q F, the other end
It is separately connected three input terminals of three-phase conic rotor braking motor M；
The control circuit includes hanging liter control circuit and decentralization control circuit；
It is described hang L3 phase that liter control circuit includes the circuit breaker Q F output end being sequentially connected in series, it is normally opened hang a liter button SB1, under
It puts the normally closed second auxiliary contact KM2-2 of contactor KM2, hang a liter contactor KM1 coil, normally closed stop button SB3 and breaker
The L2 phase of QF output end；
The decentralization control circuit includes the L1 phase for the circuit breaker Q F output end being sequentially connected in series, normally opened decentralization button SB2, hangs
Rise normally closed second auxiliary contact KM1-2, decentralization contactor KM2 coil, normally closed stop button SB3 and the breaker of contactor KM1
The L2 phase of QF output end；
The three-phase windings of the three-phase conic rotor braking motor M are triangle connection；
The open-phase protection circuit includes capacitor C1, C2, C3 and relay K；One end of described capacitor C1, C2, C3
One end of relay K coil is connected after interconnection, the other end of capacitor C1, C2, C3 are separately connected three-phase cone rotor system
Three input terminals of dynamic motor M；The capacity of described capacitor C1, C2, C3 are identical；The other end of the relay K coil connects
The normally closed first contact K-1 of the zero curve N of three phase mains, relay K and the normally opened third auxiliary contact for hanging liter contactor KM1
Both ends after KM1-3 is serially connected hang that liter button SB1 is in parallel self-locking with normally opened, the normally closed second contact K-2 of relay K and under
Put contactor KM2 normally opened third auxiliary contact KM2-3 be serially connected after both ends and normally opened decentralization button SB2 it is in parallel self-locking；
A liter contactor KM1, decentralization contactor KM2, capacitor C1, C2, C3 and the relay K of hanging is set to control cabinet 3
It is interior.
The working principle of the present embodiment is：When hanging the suspension hook 4 of electric block liter, circuit breaker Q F is closed, is pressed normally opened
A liter button SB1 is hung, liter control circuit is hung and connects, hangs a liter contactor KM1 energized action, main contacts KM1-1 closure, normally closed second
Auxiliary contact KM1-2 is disconnected, normally opened third auxiliary contact KM1-3 is closed, and main circuit is connected, three-phase conic rotor braking motor M
Obtain electric rotating forward operation；After hanging the normally closed second auxiliary contact KM1-2 disconnection of liter contactor KM1, interlocking is played to decentralization control circuit
Effect, even if pressing normally opened decentralization button SB2 at this time, decentralization control circuit will not be connected；Hang normally opened the of liter contactor KM1
After three auxiliary contact KM1-3 closure, to hang liter button SB1 parallel connection self-locking to normally opened, unclamp at this time it is normally opened hang a liter button SB1 will not shadow
Ring the operation of three-phase conic rotor braking motor M；Such as to stop suspension hook 4 and hang liter, press normally closed stop button SB3 cutting and hang a liter control
Circuit processed hangs a liter contactor KM1 power loss, and main contacts KM1-1 is disconnected, and three-phase conic rotor braking motor M is out of service, hangs liter
Auxiliary contact KM1-2, KM1-3 of contactor KM1 also resets.
Similarly, when transferring the suspension hook 4 of electric block, circuit breaker Q F is closed, normally opened decentralization button SB2 is pressed, transferred
Control circuit is connected, and contactor KM2 energized action is transferred, and main contacts KM2-1 closure, normally closed second auxiliary contact KM2-2 are disconnected
It opens, normally opened third auxiliary contact KM2-3 closure, main circuit is connected, and three-phase conic rotor braking motor M obtains electric reversion operation；Under
After putting the normally closed second auxiliary contact KM2-2 disconnection of contactor KM2, play interlocking to a liter control circuit is hung, even if pressing at this time
Under it is normally opened hang a liter button SB1, hanging liter control circuit will not connect；Transfer the normally opened third auxiliary contact KM2-3 of contactor KM2
Self-locking to normally opened decentralization button SB2 parallel connection after closure, unclamping normally opened decentralization button SB2 at this time will not influence three-phase cone rotor
The operation of braking motor M；Such as to stop the decentralization of suspension hook 4, press normally closed stop button SB3 cutting decentralization control circuit, decentralization connects
Tentaculum KM2 power loss, main contacts KM2-1 are disconnected, and three-phase conic rotor braking motor M is out of service, and decentralization contactor KM2's is auxiliary
Contact KM2-2, KM2-3 is helped also to reset.
According to three-phase conic rotor braking motor triangle catenation principle, three-phase conic rotor braking motor M is operated normally
When, the input terminals of three-phase windings pass through the tie point U0 and three phase mains of capacitor C1, C2, C3 and relay K coil zero
Potential difference between line N is zero, and the coil of relay K does not have electric current to pass through, therefore relay K will not be attracted；As long as three-phase electricity
As soon as any phase phase shortage in source, potential difference is not zero between tie point U0 and zero curve N, and the coil of relay K just has electric current to pass through,
Relay K will be attracted, and normally-closed contact K-1, K-2 just will disconnect, and can not hang liter button SB1 or normally opened decentralization button to normally opened
SB2 progress is in parallel self-locking, hangs liter control circuit or decentralization control circuit is also just unable to maintain that on-state, hang a liter contactor KM1
Or decentralization contactor KM2 is also just unable to maintain that attracting state, three-phase conic rotor braking motor M are also just unable to run, it can be to three
Phase conic rotor braking motor M carries out effective open-phase protection.
Be equipped in the present embodiment, outside the reduction gearbox 2 for control suspension hook 4 hang rise and under be placed on extreme position and stop automatically
Limiter 7 only, the limiter 7 and reduction gearbox 2 are sequentially connected；The limiter 7 is equipped with normally closed upper limit travel switch SQ1 and often
Lower bound range switch SQ2 is closed, the normally closed upper limit travel switch SQ1, which is series at, to be hung in liter control circuit, and normally closed lower bound range is opened
SQ2 is closed to be series in decentralization control circuit.When normally closed upper limit travel switch SQ1 or normally closed lower bound range switch SQ2 is acted,
Normally-closed contact disconnects, and liter control circuit or decentralization control circuit are hung in cutting, hangs liter contactor KM1 or decentralization contactor KM2 is disconnected
Main circuit is cut off, three-phase conic rotor braking motor M stops operating.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, any change or replacement expected without creative work be should be covered within the scope of the utility model.
Therefore, the protection scope of the utility model should be determined by the scope of protection defined in the claims.
Claims (2)
1. the electric block with simple open-phase protection circuit, including three-phase conic rotor braking motor, reel, reduction gearbox, control
Case, suspension hook, control button and operation circuit；The three-phase conic rotor braking motor is set to reel one end, and reduction gearbox is set to volume
The cylinder other end, control cabinet are set to three-phase conic rotor braking outside motor, and suspension hook is connected by wirerope with reel；The control
Button hangs a liter button, normally opened decentralization button and normally closed stop button equipped with normally opened；
The operation circuit includes main circuit, control circuit and open-phase protection circuit；The main circuit includes three phase mains, open circuit
Device hangs a liter contactor, decentralization contactor and three-phase conic rotor braking motor；The input terminal of the breaker is separately connected three-phase
L1 phase, L2 phase and the L3 phase of power supply；It is described hang liter contactor for control three-phase conic rotor braking motor rotating forward hang liter, thirdly
One end of a main contacts is separately connected three output ends of breaker, and the other end is separately connected three-phase conic rotor braking motor
Three input terminals；The decentralization contactor is transferred for controlling three-phase conic rotor braking motor reversal, three of them main contacts
One end is separately connected three output ends of breaker, and the other end is separately connected three inputs of three-phase conic rotor braking motor
End；
The control circuit includes hanging liter control circuit and decentralization control circuit；
It is described to hang L3 phase that liter control circuit includes the breaker output end being sequentially connected in series, normally opened hang a liter button, decentralization contactor
Normally closed second auxiliary contact, hang the L2 phase of a liter contactor coil, normally closed stop button and breaker output end；
The decentralization control circuit includes the L1 phase for the breaker output end being sequentially connected in series, normally opened decentralization button, hangs a liter contactor
Normally closed second auxiliary contact, decentralization contactor coil, normally closed stop button and breaker output end L2 phase；Its feature exists
In：
The three-phase windings of the three-phase conic rotor braking motor are triangle connection；
The open-phase protection circuit includes capacitor C1, C2, C3 and relay；One end of described capacitor C1, C2, C3 mutually interconnect
One end of relay coil is connected after connecing, the other end of capacitor C1, C2, C3 are separately connected three-phase conic rotor braking motor
Three input terminals；The capacity of described capacitor C1, C2, C3 are identical；The other end connection three phase mains of the relay coil
Zero curve, normally closed first contact of the relay and the normally opened third auxiliary contact for hanging liter contactor be serially connected after both ends and often
Liter button parallel connection of holding funeral rites is self-locking, and normally closed second contact of the relay and the normally opened third auxiliary contact of decentralization contactor are mutually gone here and there
Both ends and normally opened decentralization button after connection are in parallel self-locking；
A liter contactor, decentralization contactor, capacitor C1, C2, C3 and the relay of hanging is set in control cabinet.
2. the electric block of the simple open-phase protection circuit of band according to claim 1, it is characterised in that：Outside the reduction gearbox
Portion be equipped with for control suspension hook hang rise and under be placed on the self-braking limiter of extreme position, the limiter and reduction gearbox transmission connect
It connects；The limiter is equipped with normally closed upper limit travel switch and normally closed lower bound range switchs, the normally closed upper limit travel switch series connection
In hanging in liter control circuit, normally closed lower bound range switch is series in decentralization control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820290355.2U CN208150845U (en) | 2018-03-02 | 2018-03-02 | Electric block with simple open-phase protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820290355.2U CN208150845U (en) | 2018-03-02 | 2018-03-02 | Electric block with simple open-phase protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208150845U true CN208150845U (en) | 2018-11-27 |
Family
ID=64383712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820290355.2U Expired - Fee Related CN208150845U (en) | 2018-03-02 | 2018-03-02 | Electric block with simple open-phase protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208150845U (en) |
-
2018
- 2018-03-02 CN CN201820290355.2U patent/CN208150845U/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 |
Granted publication date: 20181127 Termination date: 20190302 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |