CN203716211U - AFE frequency converter protection system for excavator - Google Patents
AFE frequency converter protection system for excavator Download PDFInfo
- Publication number
- CN203716211U CN203716211U CN201420067253.6U CN201420067253U CN203716211U CN 203716211 U CN203716211 U CN 203716211U CN 201420067253 U CN201420067253 U CN 201420067253U CN 203716211 U CN203716211 U CN 203716211U
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- afe
- feedback unit
- control loop
- loop
- frequency converter
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Abstract
The utility model discloses an AFE frequency converter protection system for an excavator. The AFE frequency converter protection system comprises a delay shutdown control loop I, and a rectifier feedback unit control loop II, and is characterized in that a vacuum contactor I is connected in series to the delay shutdown control loop I, and a brake linkage mechanism 2 and an AFE stopping switch 3 are connected in parallel and are connected with a first rectifier feedback unit 4 and a second rectifier feedback unit 5 in series. The brake linkage mechanism and an AFE stropping button are connected in parallel, accordingly, a brake is stopped firstly and then AFE is stopped during shutdown, and the AFE shuts down by using a free shutdown mode. A line is improved to increase the capacity of pre-charged contactor, and redundant protection assisting contact points are reduced, so that the excessive current caused by oscillation during pre-charging is avoided, the service life of a pre-charged loop is prolonged, and the truck smashing phenomenon caused by AFE tripping due to damage caused by excessive current is avoided.
Description
Technical field: the utility model relates to a kind of frequency converter protection system of main extractive equipment of opencut.
Background technology:
Power shovel is that the shovel installing of surface mine extensive use is standby, comprises equipment, slewing equipment, running gear, power-equipment and machine room etc.Wherein equipment comprises scraper bowl, the handle of the Dipper, opens wire rope, bipod and the boom hoist cable etc. of the bucket end device, cantilever, suspension cantilever.Scraper bowl and handle of the Dipper rigid connection, in the time that the handle of the Dipper is stretched out scraper bowl by the effect of dipper crowding gear, boom hoist cable is mentioned scraper bowl under hoisting mechanism effect, by stretching out the close fit of scraper bowl and lifting scraper bowl, ore deposit rock can be packed in scraper bowl.
Described AFE frequency converter refers to frequency conversion speed-adjusting system, and three-phase alternating current is become to direct current, and due to component ageing and the system defect of AFE, trip phenomenon frequently appears in power shovel, has a strong impact on equipment turnout, often occurs that bucket pounds car phenomenon.
Summary of the invention:
Due to the problems referred to above; a kind of power shovel AFE frequency converter protection system that the utility model design addresses this problem, has improved the braking ability of power shovel, can not pound truck while better protecting power shovel entrucking; extend simultaneously effectively and promote band-type brake application life, save maintenance cost.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of power shovel AFE frequency converter protection system; it is characterized in that; comprise PLC self-test unit; control loop is shut down in time delay; rectified feedback unit control loop, power shovel hard stop loop and AFE operating loop, control loop is shut down in described time delay; rectified feedback unit control loop, is electrically connected with described PLC self-test unit after power shovel hard stop loop and the parallel connection of AFE operating loop.
Wherein, described time delay shutdown control loop comprises vacuum contactor, normal opened contact and time delay stopping relay.Described rectified feedback unit control loop, comprises band-type brake interlocking mechanism, AFE shutdown switch, the first rectified feedback unit and the second rectified feedback unit.Described power shovel hard stop loop comprises normal opened contact and the hard stop time relay.Described AFE operating loop comprises AFE running unit and AFE operation indicating member.
The vacuum contactor of described power shovel AFE frequency converter protection system is connected with normal opened contact and time delay stopping relay.After described band-type brake interlocking mechanism is in parallel with AFE shutdown switch, be connected in series with the first rectified feedback unit and the second rectified feedback unit.
Compared with prior art, the utlity model has following beneficial effect:
1. vacuum contactor poor signal vacuum contactor is set in time delay shutdown procedure, if can cause time delay machine halt trouble.
2. under stop button, band-type brake interlocking mechanism in parallel prevents that scraper bowl from gliding; promote band-type brake protection for Hoisting System foundation to protect; electrical system action is more senior protection; can ensure more reliably the braking of scraper bowl by duplicate protection; can avoid driver to open under the state of band-type brake and close AFE; by being arranged in parallel; make program after all mechanisms band-type brake, just can close AFE closing; otherwise can not close AFE; make driver must first close band-type brake in the time shutting down by the design in program like this, do not close before having avoided band-type brake while closing AFE dipper glide.
3. avoid driver's disorderly closedown when operation under lifting state.
4. will stop in the mode of freely shutting down when the existing problems of AFE own, avoid causing inverter cabinet to damage.
Brief description of the drawings:
Accompanying drawing 1 is structural representation of the present utility model.
Detailed description of the invention:
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated.
A kind of power shovel AFE frequency converter protection system; comprise PLC self-test unit; control loop I is shut down in time delay; rectified feedback unit control loop II; power shovel hard stop loop (in figure the 2nd section) and AFE operating loop (in figure the 4th section); control loop I is shut down in described time delay, and rectified feedback unit control loop II, is electrically connected with described PLC self-test unit after power shovel hard stop loop and the parallel connection of AFE operating loop.
Wherein, described time delay shutdown control loop I comprises vacuum contactor 1, normal opened contact and time delay stopping relay.Vacuum contactor 1 is connected with normal opened contact M0.2, M0.3, M0.4, M0.5 and time delay stopping relay.M0.2, M0.3, M0.4, M0.5 closed rear power shovel just can not shut down in time delay.Time delay relay downtime T3, causes time delay machine halt trouble M10.2 coil losing electricity after 50 seconds.
Described power shovel hard stop loop comprises normal opened contact and the hard stop time relay.Power shovel hard stop fault condition M10.2, M0.6, M0.7 have any point access failure can cause hard stop fault, and hard stop time relay T8 causes 500 milliseconds of M10.3 coil losing electricities of time delay after hard stop fault.
Described rectified feedback unit control loop II comprises band-type brake interlocking mechanism 2, AFE shutdown switch 3, the first rectified feedback units 4 and the second rectified feedback unit 5.In rectified feedback unit control loop II, after band-type brake interlocking mechanism 2 is in parallel with AFE shutdown switch 3, be connected in series with the first rectified feedback unit 4 and the second rectified feedback unit 5.Main AFE detecting unit, be on-state from AFE detecting unit, after M10.3, T4, band-type brake interlocking mechanism 2 connect AFE start button I17.4 during for closure state, the second rectified feedback unit 5 electric, power shovel AFE normally starts.The first rectified feedback unit 4 is by M10.3, I17.4, tri-some short circuits of T4 simultaneously, after the power-off of above three points, the second rectified feedback unit 5 can power-off, each mechanism motor that AFE controls still electric, therefore motor still has the electric current existence of gripping, can not cause the each mechanical mechanism of power shovel to jerk.After only having band-type brake interlocking mechanism 2 power-off (mechanical braking), could disconnect AFE power supply.Band-type brake interlocking mechanism 2 is in parallel with AFE stop button 3, makes must first close band-type brake in the time shutting down, avoided not closing band-type brake while closing AFE scraper bowl bar glide.AFE frequency converter adopts free halt mode to shut down.
Described AFE operating loop comprises AFE running unit and AFE operation indicating member.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the each embodiment technical scheme of the utility model.
Claims (3)
1. a power shovel AFE frequency converter protection system, it is characterized in that, comprise PLC self-test unit, control loop (I) is shut down in time delay, rectified feedback unit control loop (II), power shovel hard stop loop and AFE operating loop, control loop (I) is shut down in described time delay, rectified feedback unit control loop (II), is electrically connected with described PLC self-test unit after power shovel hard stop loop and the parallel connection of AFE operating loop; Wherein,
Described time delay is shut down control loop (I) and is comprised vacuum contactor (1), normal opened contact and time delay stopping relay;
Described rectified feedback unit control loop (II) comprises band-type brake interlocking mechanism (2), AFE shutdown switch (3), the first rectified feedback unit (4) and the second rectified feedback unit (5);
Described power shovel hard stop loop comprises normal opened contact and the hard stop time relay;
Described AFE operating loop comprises AFE running unit and AFE operation indicating member.
2. power shovel AFE frequency converter protection system according to claim 1, is characterized in that, described vacuum contactor (1) is connected with normal opened contact and time delay stopping relay.
3. power shovel AFE frequency converter protection system according to claim 1, is characterized in that, after described band-type brake interlocking mechanism (2) is in parallel with AFE shutdown switch (3), is connected in series with the first rectified feedback unit (4) and the second rectified feedback unit (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067253.6U CN203716211U (en) | 2014-02-17 | 2014-02-17 | AFE frequency converter protection system for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067253.6U CN203716211U (en) | 2014-02-17 | 2014-02-17 | AFE frequency converter protection system for excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203716211U true CN203716211U (en) | 2014-07-16 |
Family
ID=51155380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420067253.6U Expired - Fee Related CN203716211U (en) | 2014-02-17 | 2014-02-17 | AFE frequency converter protection system for excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203716211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709570A (en) * | 2020-12-18 | 2021-04-27 | 华能伊敏煤电有限责任公司 | Control device for moving and fine-tuning under remote operation electric shovel |
-
2014
- 2014-02-17 CN CN201420067253.6U patent/CN203716211U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709570A (en) * | 2020-12-18 | 2021-04-27 | 华能伊敏煤电有限责任公司 | Control device for moving and fine-tuning under remote operation electric shovel |
| CN112709570B (en) * | 2020-12-18 | 2023-04-11 | 华能伊敏煤电有限责任公司 | Control device for moving and fine-tuning under remote operation electric shovel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20170217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |