CN204549870U - Crane hoisting mechanism control setup - Google Patents
Crane hoisting mechanism control setup Download PDFInfo
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- CN204549870U CN204549870U CN201520254530.9U CN201520254530U CN204549870U CN 204549870 U CN204549870 U CN 204549870U CN 201520254530 U CN201520254530 U CN 201520254530U CN 204549870 U CN204549870 U CN 204549870U
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Abstract
The utility model discloses a kind of crane hoisting mechanism control setup, be intended to solve the complex circuit that existing crane hoisting mechanism control technology exists, the technical matters that maintenance is difficult, equipment component fault rate is high.It comprises power supply, mainly makes control unit, PLC control unit and main loop unit, and the main control unit that makes comprises master controller KS and input control relay K 20-K24; The output control relay K1-K8 that PLC control unit comprises PLC, voltage transformer B2 and is in parallel; Main loop unit comprises circuit breaker Q F1, overcurrent relay 10LJ, 11LJ, and reversing contactor ZC, FC and braking contactor ZDC; The utility model has the advantage that wiring is simple, easy access is safeguarded, and control process more accurately, circuit and device security high, effectively can improve the work efficiency of hoisting crane.
Description
Technical field
The utility model relates to hoisting crane technical field of electric control, is specifically related to a kind of crane hoisting mechanism control setup.
Background technology
Hoisting crane is a kind of extraordinary high-risk operations equipment, requires very high in hoisting crane working process for the safety of its lifting mechanism, action accuracy.Crane hoisting mechanism conventional at present controls assembling system and belongs to GB control system, its equipment component selected is numerous, external cabling complex circuit, easily because circuit question causes apparatus failure, also there is the problem of maintenance difficulty, especially the element failure rate such as relay is high for equipment component wherein, thus causes hoisting crane work unstable properties, device security low.
Summary of the invention
The utility model is intended to solve the complex circuit that existing crane hoisting mechanism control technology exists, the technical matters that maintenance is difficult, equipment component fault rate is high.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
Design a kind of crane hoisting mechanism control setup, comprise power supply, mainly make control unit, PLC control unit and main loop unit, it is characterized in that, the described main control unit that makes comprises master controller KS and input control relay K 20, K21, K22, K23, K24, correspondingly with described master controller after described input control relay K 20, K21, K22, K23, K24 parallel connection connects.
Output control relay K1, K2, K3, K4, K5, K6, K7, K8 that described PLC control unit comprises PLC, voltage transformer B2 and is in parallel, described PLC is connected with power supply by described voltage transformer B2, described input control relay K 20, K21, K22, K23, K24 correspondence are connected to the signal input part of described PLC, and described output control relay K1, K2, K3, K4, K5, K6, K7, K8 correspondence is connected to the signal output part of described PLC.
Described main loop unit comprises circuit breaker Q F1, overcurrent relay 10LJ, 11LJ, and contactless for hoisting ZC, decline contactless switch FC and braking contactor ZDC, described overcurrent relay 10LJ, 11LJ are connected to power supply by described circuit breaker Q F1, after described contactless for hoisting ZC, decline contactless switch FC parallel connection, one end is corresponding with described overcurrent relay 10LJ, 11LJ connects, and the other end is connected to the lifting electric motor SD of hoisting crane; Described braking contactor ZDC one end is corresponding with described overcurrent relay 10LJ, 11LJ to be connected, and the other end is connected to the brake motor ZD of hoisting crane; The other end of the lifting electric motor SD of hoisting crane is connected with reversal connection resistance contactor FJC and cuts resistance contactor 1JSC, 2JSC, 3JSC.
Wherein, between described output control relay K8 and described PLC, load limiter SCZK and lifting limiter SXK is in series with.
Described overcurrent relay 10LJ, 11LJ are also corresponding with the signal input part of described PLC to be connected.
The beneficial effect of the utility model crane hoisting mechanism control setup is:
1. the utility model is realized the control of crane hoisting mechanism by PLC, make hoisting crane accuracy of action higher, misoperation can not be produced because of the interference of component ageing or external factor, and greatly simplifie the external cabling of circuit, effectively can reduce the breakdown of equipment problem caused due to complex circuit; Input control relay is adopted to be PLC incoming signal, can effectively prevent other induced current to the interference of PLC, output control relay is adopted to be PLC output signal, the problem that the output contact that can effectively avoid PLC to cause because contact capacity is little easily burns.
2. circuit breaker provides Global Macros for this control setup; it is abnormal that overcurrent relay is used for avoiding this control setup to produce because electric current is excessive; each element cooperatively interacts, and for the utility model control setup provides safe circuit protection, makes this control setup safety stronger.
3. the utility model has the advantage that wiring is simple, easy access is safeguarded, and control process more accurately, circuit and device security high, effectively can improve the work efficiency of hoisting crane.
Accompanying drawing explanation
Fig. 1 is the main electrical schematic diagram making control unit of the utility model crane hoisting mechanism control setup;
Fig. 2 is the electrical schematic diagram of PLC control unit;
Fig. 3 is the electrical schematic diagram of main loop unit.
Detailed description of the invention
Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described, but the following example is only used to describe embodiment of the present utility model in detail, and limits scope of the present utility model never in any form.
Embodiment 1: a kind of crane hoisting mechanism control setup, comprise power supply, mainly make control unit, PLC control unit and main loop unit, the main control unit that makes comprises master controller KS and input control relay K 20, K21, K22, K23, K24, correspondingly with master controller after input control relay K 20, K21, K22, K23, K24 parallel connection connects.
Output control relay K1, K2, K3, K4, K5, K6, K7, K8 that PLC control unit comprises PLC, voltage transformer B2 and is in parallel, PLC is connected with power supply by voltage transformer B2, input control relay K 20, K21, K22, K23, K24 correspondence are connected to the signal input part of PLC, and output control relay K1, K2, K3, K4, K5, K6, K7, K8 correspondence is connected to the signal output part of PLC; Load limiter SCZK and lifting limiter SXK is in series with between output control relay K8 and PLC.
Main loop unit comprises circuit breaker Q F1, overcurrent relay 10LJ, 11LJ, and contactless for hoisting ZC, decline contactless switch FC and braking contactor ZDC, overcurrent relay 10LJ, 11LJ are connected to power supply by circuit breaker Q F1, after contactless for hoisting ZC, decline contactless switch FC parallel connection, one end is corresponding with overcurrent relay 10LJ, 11LJ connects, and the other end is connected to the lifting electric motor SD of hoisting crane; Braking contactor ZDC one end is corresponding with overcurrent relay 10LJ, 11LJ to be connected, and the other end is connected to the brake motor ZD of hoisting crane; The other end of the lifting electric motor SD of hoisting crane is connected with reversal connection resistance contactor FJC and cuts resistance contactor 1JSC, 2JSC, 3JSC; Overcurrent relay 10LJ, 11LJ are also corresponding with the signal input part of PLC to be connected.
Equipment involved in the embodiment above, element if no special instructions, are conventional equipment, element.
The specific works mode of the utility model crane hoisting mechanism control setup is:
Correspondingly with the master controller KS that crane hoisting mechanism matches be elevated each three gears, the corresponding zero-bit of input control relay K 20, the corresponding one grade of rising of input control relay K 21, the corresponding one grade of decline of input control relay K 22, the corresponding second gear of input control relay K 23, the corresponding third gear of input control relay K 24.All pass through input control relay K 20, K21, K22, K23, K24 in the two directions by command to PLC, after PLC inter-process, send output signal, drive output control relay K1-K7 adhesive, then drive contactless for hoisting ZC, decline contactless switch FC, braking contactor ZDC and accelerating contactor FJC, 1JSC, 2JSC, 3JSC to drive the lifting electric motor SD of hoisting crane to carry out corresponding action by output control relay K1-K7.When hoisting crane rises or decline, during if there is electromotor overload or motor fault, overcurrent relay 10LJ, 11LJ will actions, by signal transmission to PLC, to forbid that all output commands send after PLC detects the signal of overcurrent relay 10LJ, 11LJ, make electrical motor emergent stopping.If when occurring overload condition when rising or reach the rising limit, output control relay K8 will disconnect, now PLC receives overload or reaches the signal of rising end position, will forbid the output of rising signals, hoisting crane can only be declined.
Control process when hoisting crane rises is: during one grade of rising, master controller KS delivers to PLC rising signals through input control relay, through the inter-process of PLC, contactless for hoisting ZC, braking contactor ZDC adhesive is driven by output control relay, lifting electric motor SD brings into operation, and carries out vertical motion.When second gear, third gear, reversal connection resistance contactor FJC and cut resistance contactor 1JSC, 2JSC, 3JSC and excise step by step, controls lifting electric motor and reaches the most at a high speed.
The control process that hoisting crane reversing braking declines is: one grade of decline is that reversing braking declines, be used for putting heavily loaded object, when master controller becomes one grade of decline from zero-bit, contactless for hoisting ZC and the equal access failure of braking contactor ZDC, drg does not work, and lifting electric motor does not also rotate.When master controller gets back to one grade of decline from second gear, PLC connects electricity, contactless for hoisting ZC adhesive, and drg is opened, and at this moment lifting electric motor is connected into ascent direction when rotor accesses whole resistance.During as load comparatively large (being greater than 60% rated load, nominal load), load deadweight is greater than lifting electric motor moment of starting, and load is in fact with descending at slow speed, and this mode becomes reversing braking and declines.Master controller is disconnected when zero-bit becomes one grade of decline, can avoid becoming unnecessary reversal connection state in the occasion that load is less, reduces the action frequency of contactless switch.
The control process that hoisting crane underloading declines is: when weight is less than 1/3 of rated load, decline if master controller is adjusted to second gear, then PLC sends signal, decline contactless switch FC, reversal connection resistance contactor FJC and braking contactor ZDC are connected, lifting electric motor SD and brake motor ZD works simultaneously, now weight descending at slow speed.When weight is more than 1/3 of rated load time, master controller must be adjusted to fast third gear and do regenerative braking decline, otherwise will occur slipping hook phenomenon.
The control process that hoisting crane regenerative braking declines is: when lifting electric motor declines starting, its moment of rotation sent is consistent with the force direction that load produces, so accelerate very fast, only have when lifting electric motor rotating speed exceed synchronous speed become make generator operation after, because direction of current changes, the moment direction that lifting electric motor sends also changes, the moment that the last and load of this opposing torque produces balances each other, just reach stable operating speed, this mode of operation becomes regenerative braking and declines.It is exactly that regenerative braking declines that third gear declines, and can reach the descending speed a little more than rated value.
In conjunction with the accompanying drawings and embodiments embodiment of the present utility model is elaborated above, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also carry out changing or changing under the prerequisite not departing from the utility model aim.
Claims (2)
1. a crane hoisting mechanism control setup, comprise power supply, mainly make control unit, PLC control unit and main loop unit, it is characterized in that, the described main control unit that makes comprises master controller KS and input control relay K 20, K21, K22, K23, K24, correspondingly with described master controller after described input control relay K 20, K21, K22, K23, K24 parallel connection connects; Output control relay K1, K2, K3, K4, K5, K6, K7, K8 that described PLC control unit comprises PLC, voltage transformer B2 and is in parallel, described PLC is connected with power supply by described voltage transformer B2, described input control relay K 20, K21, K22, K23, K24 correspondence are connected to the signal input part of described PLC, and described output control relay K1, K2, K3, K4, K5, K6, K7, K8 correspondence is connected to the signal output part of described PLC; Described main loop unit comprises circuit breaker Q F1, overcurrent relay 10LJ, 11LJ, and contactless for hoisting ZC, decline contactless switch FC and braking contactor ZDC, described overcurrent relay 10LJ, 11LJ are connected to power supply by described circuit breaker Q F1, after described contactless for hoisting ZC, decline contactless switch FC parallel connection, one end is corresponding with described overcurrent relay 10LJ, 11LJ connects, and the other end is connected to the lifting electric motor SD of hoisting crane; Described braking contactor ZDC one end is corresponding with described overcurrent relay 10LJ, 11LJ to be connected, and the other end is connected to the brake motor ZD of hoisting crane; The other end of the lifting electric motor SD of hoisting crane is connected with reversal connection resistance contactor FJC and cuts resistance contactor 1JSC, 2JSC, 3JSC.
2. crane hoisting mechanism control setup according to claim 1, is characterized in that, is in series with load limiter SCZK and lifting limiter SXK between described output control relay K8 and described PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520254530.9U CN204549870U (en) | 2015-04-25 | 2015-04-25 | Crane hoisting mechanism control setup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520254530.9U CN204549870U (en) | 2015-04-25 | 2015-04-25 | Crane hoisting mechanism control setup |
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| Publication Number | Publication Date |
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| CN204549870U true CN204549870U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520254530.9U Expired - Fee Related CN204549870U (en) | 2015-04-25 | 2015-04-25 | Crane hoisting mechanism control setup |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109502481A (en) * | 2018-11-26 | 2019-03-22 | 河南科润自动化有限公司 | Lifting mechanism controller |
-
2015
- 2015-04-25 CN CN201520254530.9U patent/CN204549870U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109502481A (en) * | 2018-11-26 | 2019-03-22 | 河南科润自动化有限公司 | Lifting mechanism controller |
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| Date | Code | Title | Description |
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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 |
Granted publication date: 20150812 Termination date: 20160425 |