CN201825662U - Electric protection control device of overhead crane hoisting mechanism - Google Patents
Electric protection control device of overhead crane hoisting mechanism Download PDFInfo
- Publication number
- CN201825662U CN201825662U CN2010205530923U CN201020553092U CN201825662U CN 201825662 U CN201825662 U CN 201825662U CN 2010205530923 U CN2010205530923 U CN 2010205530923U CN 201020553092 U CN201020553092 U CN 201020553092U CN 201825662 U CN201825662 U CN 201825662U
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- CN
- China
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- circuit
- crane hoisting
- hoisting mechanism
- contact
- control device
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Abstract
The utility model relates to an electric protection control device of an overhead crane hoisting mechanism, comprising a crane hoisting motor, a crane trolley, a main circuit and a control circuit, wherein the main circuit comprises a power supply switch, a line contactor main contact and an overcurrent relay, wherein the control circuit comprises a signal lamp, a switch, a button, a contactor and an overcurrent relay. The electric protection control device of the overhead crane hoisting mechanism is characterized in that the end part of an output shaft of the crane hoisting motor is provided with a spiral limiter; a bottom plate of the crane trolley is provided with a heavy hammer limiter; and a normal close contact of the heavy hammer limiter is connected in series with a chain protection circuit of the control circuit. The electric protection control device of the overhead crane hoisting mechanism is simple, is convenient to install, can effectively avoid the phenomenon that the equipment is damaged and staff are injured due to the failure of hoisting limiting as a control screen of the hoisting mechanism rises and results in adhesion of the contact of the contactor.
Description
Technical field:
The utility model is mainly used in the protection crane in bridge type electrical motor that hoists, and is specifically related to a kind of electric protection control setup of bridge crane hoisting mechanism.
Background technology:
At present, the crane in bridge type electrical motor that hoists adopts contactor control, its control setup is made of major loop and control loop, the just commentaries on classics of master controller direct control electrical motor, counter-rotating contactless switch, and excise resistor step by step, the normal battle of time breaker be connected in parallel on the contactless for hoisting loop after the normally closed point of decline contactless switch is connected, drg and electrical motor are connected in parallel.In operation process, the lifting mechanism control panel contactless for hoisting contact adhesion that happens occasionally, the spacing inefficacy that causes hoisting causes equipment and personnel's infringement.
Summary of the invention:
For fear of above-mentioned phenomenon, the utility model provides a kind of electric protection control setup of bridge crane hoisting mechanism.
The utility model comprises crane hoisting electrical motor, monkey, power circuit and control circuit; power circuit by source switch, circuit connect separate the device main contact, overcurrent relay constitutes; control circuit comprises zero position protection circuit, safe limit circuit, interlock protection circuit; the output shaft end that it is characterized in that the crane hoisting electrical motor is equipped with the spiral limiting device; the monkey base plate is provided with the weight limiting device, and the normally closed contact of weight limiting device is serially connected in the interlock protection circuit of control circuit.
The zero position protection circuit is by K
s, K
d, K
xForm; ZXK
s, ZXK
d, ZXK
xBe respectively the left lateral of lifting mechanism, traveling mechanism of the larger traveller, the forward stroke switch of wheeling mechanism, FXK
dAnd FXK
xBe respectively the right lateral or the backward travel switch of cart and wheeling mechanism, they constitute safe limit circuit; GLJ, 1GLJ～4GLJ are the overcurrent relay contact, and they constitute the interlock protection circuit.
The utility model equipment is simple, and is easy for installation, can effectively avoid because of the contact adhesion of lifting mechanism control panel contactless for hoisting, and the spacing inefficacy that causes hoisting causes the phenomenon of equipment and personnel's infringement.
Description of drawings:
Fig. 1 is the main circuit diagram among the utility model embodiment.
Fig. 2 is the control circuit figure among the utility model embodiment.
The specific embodiment:
Embodiment: present embodiment comprises existing crane hoisting electrical motor, monkey, power circuit and control circuit; power circuit by source switch, circuit connect separate the device main contact, overcurrent relay constitutes; control circuit comprises zero position protection circuit, safe limit circuit, interlock protection circuit; the output shaft end that it is characterized in that the crane hoisting electrical motor is equipped with the spiral limiting device; the monkey base plate is provided with the weight limiting device, and the normally closed contact XWQ of weight limiting device is serially connected in the interlock protection circuit of control circuit.
Shown in Figure 1, in the power circuit: 1DK is a total power switch, and out-of-work-time is used for cutting off the electricity supply, during maintenance as disconnector; X
C1, X
C2, X
C3Separate the device main contact for circuit connects, be used for switching on or off power supply, double as decompression and under-voltage protection; GLJ is the coil of total overcurrent relay; 1GLJ, 4GLJ are the overcurrent relay coil of each branch road; The overcurrent relay coil that 2GLJ, 3GLJ use for the traveling mechanism of the larger traveller electrical motor of transmission respectively; X
21T, X
23TTwo terminations connect crane operation cam controller, and the power end that again cart is moved cam controller is received the X of main circuit contact device
21, X
23End, if traveling mechanism of the larger traveller is a central driving, then the mode of connection of 2GLJ, 3GLJ is identical with 1GLJ and 4GLJ.
Shown in Figure 2, in the control circuit: XD is a signal lamp, and power connection is promptly bright; 1RD is a fuse.As short-circuit protection; JK is a safety switch, disjunction power supply under the normal circumstances, sudden stop under the failure condition; QA is a start button, the normal circumstances energized; 1XK～3XK is hatch door, crossbeam door safety switch.When door is closed, contact closure, when door was opened, contact disconnected, and the coil of clear the circuit contactless switch XC plays the interlock protection effect; GLJ, 1GLJ～4GLJ are the overcurrent relay contact, and any one contact disconnects, and all can make the XC coil losing electricity, play overcurrent protection; K
s, K
d, K
xBe respectively the contact of lifting mechanism, cart, wheeling mechanism cam controller, have only when each cam controller all is in zero-bit, the XC coil could be connected, play the zero position protection effect; ZXK
s, ZXK
d, ZXK
xBe respectively the left lateral of lifting mechanism, traveling mechanism of the larger traveller, the forward stroke switch of wheeling mechanism, and FXK
dAnd FXK
xBe respectively the right lateral or the backward travel switch of cart and wheeling mechanism.When mechanism during to the operation of certain direction, then with the contact incircuit of corresponding travel switch of this direction and cam controller, the contact of the cam controller of reverse direction operation then disconnects.When mechanism ran to the end position of certain direction, corresponding limit switch disconnected under the effect of safety chi, makes the XC coil losing electricity, and electrical motor stops operating, and reaches spacing purpose.Before restarting, cam controller must be recovered zero-bit, and control handle can only rotate to the direction opposite with original direction.Otherwise line contactor can not be worked; Two auxiliary normally open contact XC-5, XC-4 of line contactor play self-insurance (lock) effect, because when lifting button QA, and during operating control handle, controller zero-bit contact disconnects.
The working process of present embodiment is: shown in Figure 2, the guard box knife-like switch that closes, the pressing start button, electric current by 1. and direction 4. flow through, be the contactless switch power supply, so the main contact of contactless switch and chain contact are closed simultaneously.When unclamping start button, 1. circuit disconnects, but circuit 2., 3., 4. still can power for contactless switch, makes contactless switch keep mode of operation.When hoisting operation, the chain contact that descends disconnects, and the electric current edge 3., 4. circuit is the contactless switch power supply.When load hook is raised to end position, rising end position switch ZXK
sRushed open, chain contact K descends this moment.Also be open circuited, so 1., 2., 3. circuit all disconnects, contactless switch outage breaking, hoisting crane quits work.As the weight that descends, electric current can only be from 2., 4. circuit be contactless switch power supply.Hoisting crane is in operation process.4. any one protection switch or overcurrent relay contact disconnect in the loop, can both make contactless switch outage breaking.
Claims (1)
1. the electric protection control setup of a bridge crane hoisting mechanism; comprise crane hoisting electrical motor, monkey, power circuit and control circuit; power circuit by source switch, circuit connect separate the device main contact, overcurrent relay constitutes; control circuit comprises zero position protection circuit, safe limit circuit, interlock protection circuit; the output shaft end that it is characterized in that the crane hoisting electrical motor is equipped with the spiral limiting device; the monkey base plate is provided with the weight limiting device, and the normally closed contact of weight limiting device is serially connected in the interlock protection circuit of control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205530923U CN201825662U (en) | 2010-09-28 | 2010-09-28 | Electric protection control device of overhead crane hoisting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205530923U CN201825662U (en) | 2010-09-28 | 2010-09-28 | Electric protection control device of overhead crane hoisting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201825662U true CN201825662U (en) | 2011-05-11 |
Family
ID=43964212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205530923U Expired - Fee Related CN201825662U (en) | 2010-09-28 | 2010-09-28 | Electric protection control device of overhead crane hoisting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201825662U (en) |
-
2010
- 2010-09-28 CN CN2010205530923U patent/CN201825662U/en not_active Expired - Fee Related
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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: 20110511 Termination date: 20160928 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |