CN101908851A - Miniaturized crane safety starter - Google Patents
Miniaturized crane safety starter Download PDFInfo
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- CN101908851A CN101908851A CN 201010212255 CN201010212255A CN101908851A CN 101908851 A CN101908851 A CN 101908851A CN 201010212255 CN201010212255 CN 201010212255 CN 201010212255 A CN201010212255 A CN 201010212255A CN 101908851 A CN101908851 A CN 101908851A
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Abstract
The invention relates to a miniaturized crane safety starter comprising a main breaker QF, a main power contactor KM, a relay K2 normally-open contact and a main power contactor KM coil, wherein the relay K2 normally-open contact and the main power contactor KM coil are connected between a B phase and a C phase; a stop button TA, a relay K2 coil, a relay K1 normally-open contact and the relay K2 normally-open contact are parallelly arranged between the relay K2 normally-open contact and the main power contactor KM coil; a start button HA and a resistor R2 are connected between the C phase and the B phase; the start button HA, a diode VD and a resistor R1 are connected between two ends of the C phase; a main power contactor KM normally-closed contact, a relay K1 coil and a resistor R3 are connected between the resistor R1 and the resistor R2; a resistor R4 and a main power contactor KM normally-open contact are connected in series between both ends of the relay K1 coil; capacitors C1 and C2 and voltage-regulator tubes VS1 and VS2 are respectively parallelly arranged on both ends of the resistor R4 and the main power contactor KM normally-open contact; and a section between the capacitors C1 and C2 is connected with a section between the voltage-regulator tubes VS1 and VS2.
Description
Technical field
The present invention relates to a kind of crane safety starter of miniaturization safe and reliable, simple to operate.
Background technology
Taken place under the closed situation of melting welding or cam controller at the Motor Control probe of contactor, the crane total power switch that closes certainly will cause the crane sudden startup, has bigger potential safety hazard.For preventing this from occurring, the way of present domestic employing is to utilize the zero-bit contact of cam controller, but melting welding is not taken measures as yet for the control contactor contact.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of effective solution to take place under the closed situation of melting welding or cam controller at the Motor Control probe of contactor, the crane total power switch that closes certainly will cause the crane safety starter of the miniaturization of crane sudden startup potential safety hazard.
The object of the present invention is achieved like this: comprise the main breaker QF that is connected on the three phase electric machine three-phase electricity, general supply contactor KM and thermal relay FR, it is characterized in that: the B at three-phase circuit passes through fuse FU1 mutually and between the C phase, FU2 is connected with the normally opened contact of relay K 2, the coil of general supply contactor KM and the normally-closed contact of thermal relay FR, between the coil of the normally opened contact of relay K 2 and general supply contactor KM, be parallel with stop button TA, the parallel circuits of the normally opened contact of the normally opened contact of the coil of relay K 2 and relay K 1 and relay K 2, be connected with start button HA between mutually being connected in fuse FU2 that three-phase circuit C goes up mutually and B, resistance R 2, be connected with start button HA between mutually being connected in fuse FU2 that three-phase circuit C goes up mutually and C, diode VD, resistance R 1, between resistance R 1 and resistance R 2, be connected with the normally-closed contact of general supply contactor KM, the coil of relay K 1 and resistance R 3, be in series with the normally opened contact of resistance R 4 and general supply contactor KM at the two ends of the coil of relay K 1, two ends at the normally opened contact of resistance R 4 and general supply contactor KM are parallel with the series circuit of capacitor C 1 and capacitor C 2 and are parallel with voltage-stabiliser tube VS1 and the series circuit of voltage-stabiliser tube VS2, interconnect between capacitor C 1 and the capacitor C 2 and between voltage-stabiliser tube VS1 and the voltage-stabiliser tube VS2.
That the present invention has is safe and reliable, simple to operate, eliminated the advantage that power turn-on master switch motor just starts hidden danger suddenly.
Description of drawings
Fig. 1 is a circuit connection structure schematic diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention includes the main breaker QF that is connected on the three phase electric machine three-phase electricity, general supply contactor KM and thermal relay FR, it is characterized in that: the B at three-phase circuit passes through fuse FU1 mutually and between the C phase, FU2 is connected with the normally opened contact of relay K 2, the coil of general supply contactor KM and the normally-closed contact of thermal relay FR, between the coil of the normally opened contact of relay K 2 and general supply contactor KM, be parallel with stop button TA, the parallel circuits of the normally opened contact of the normally opened contact of the coil of relay K 2 and relay K 1 and relay K 2, be connected with start button HA between mutually being connected in fuse FU2 that three-phase circuit C goes up mutually and B, resistance R 2, be connected with start button HA between mutually being connected in fuse FU2 that three-phase circuit C goes up mutually and C, diode VD, resistance R 1, between resistance R 1 and resistance R 2, be connected with the normally-closed contact of general supply contactor KM, the coil of relay K 1 and resistance R 3, be in series with the normally opened contact of resistance R 4 and general supply contactor KM at the two ends of the coil of relay K 1, two ends at the normally opened contact of resistance R 4 and general supply contactor KM are parallel with the series circuit of capacitor C 1 and capacitor C 2 and are parallel with voltage-stabiliser tube VS1 and the series circuit of voltage-stabiliser tube VS2, interconnect between capacitor C 1 and the capacitor C 2 and between voltage-stabiliser tube VS1 and the voltage-stabiliser tube VS2.
Diode VD, dropping resistor R1～R3, capacitor C 1～C2, voltage-stabiliser tube VS1～VS2 and small voltage direct current relay K1 constitute banked relay jointly among the figure.C1～C2 adopts electrolytic capacitor, and when this banked relay was used for the 380V AC power, C1～C2 answered value 470 μ F, withstand voltage 16V; VD working inverse voltage height should be selected 2CP20A for use; VS1～VS2 selects 2CW111.
QX-10 tests with the small-sized DC relay J, this relay rated voltage is 24V, internal resistance is 1800 Ω, connect with 7.5k Ω dropping resistor and diode 2CP17 again behind 1 100 μ F (25V) electrolytic capacitor in parallel, 1S discharged after the outage several seconds with interior adhesive when the banked relay that constitutes was connected to the 220V AC power.But above-mentioned relay tip capacity is less, and external wire employing welding, in case sealing-off is short-circuited easily on moving equipment, so be not suitable for being used for crane.
Homemade introducing product JZ20 auxiliary contactor claims contactor relay again, and can select specification for use is 24V dc operation voltage, and power consumption is the formation banked relay of 12W.Because its coil resistance is 480 Ω, need connect about dropping resistor 4.9k Ω through eminence when being used for the 380V AC power.JZ20 relay nominal insulation voltage 660V, contact control capacity is 1000VA when being used for 380V, and the tight or plug connector of its external wire employing screw assemblies, is suitable for using on crane.If K1 adopts the JZ20 auxiliary contactor among the figure, R1, R2 can value 1.8k Ω so, and R3 value 1k Ω left and right sides R3 also should be according to the actual conditions adjustment.
Operation principle is as follows: behind the main breaker QF that closes, be the general supply contactor KM that closes, press earlier the HA button, make relay K 1 adhesive, if this moment, each Motor Control contactor or cam controller all disconnected, the voltage on relay K 1 coil equals the distribution voltage that formed by R1～R3 and K1 coil resistance so, as long as K1, R1～R3 apolegamy is suitable, this distributes voltage to be enough to guarantee the K1 adhesive, makes K2 adhesive and self-sustaining, and KM closes a floodgate; If this moment certain Motor Control contactor that contact melting welding or cam controller contact have taken place is closed, this motor winding is in parallel with K1 coil and R3 so, and the motor coil impedance is very little, make the distribution voltage on K1 and the R3 descend greatly, K1 can not adhesive, just KM can't adhesive, thereby has eliminated the hidden danger that power turn-on master switch motor just starts suddenly.
Because R1, R2 resistance are big, K2 and R3 can only be cascaded with R1, R2 and bear 380V jointly, should seal in the auxiliary normally closed contact of KM in the series loop of banked relay for this reason, and the moment before KM main contact closure disconnects K1, R3 loop.After K1, R3 loop disconnect, because the shunt capacitance C1 of K1～C2 discharge, K1 will postpone to discharge, and this just is unfavorable for the KM needs situation of separating brake immediately of just just having closed a floodgate, and may repeat combined floodgate.Increase little resistance discharge resistance R4, when KM closed a floodgate, its auxiliary normal opened contact was connected discharge circuit, and electric capacity is discharged rapidly for this reason, and K1 discharges immediately.Because contact may cause K1, R3 loop moment to bear 380V when switching, cause electric capacity to puncture, and protected with the electric capacity shunt regulator tube, and R3 power adopts 10W for this reason.
The control power supply of total contactor KM can not coincide with the control power supply two of each motor among Fig. 1; otherwise when closing KM; the decompression in Motor Control loop and zero position protection relay coil are just in parallel with K1 coil and R3; thereby reduced the voltage on the K1; make the K1 can not adhesive, KM just can't close a floodgate.Total in addition contactor control power supply and each Motor Control power supply do not overlap whether can also detect three phase mains intact, have the open phase protection effect.
Claims (1)
1. the crane safety starter of a miniaturization, comprise the main breaker QF that is connected on the three phase electric machine three-phase electricity, general supply contactor KM and thermal relay FR, it is characterized in that: the B at three-phase circuit passes through fuse FU1 mutually and between the C phase, FU2 is connected with the normally opened contact of relay K 2, the coil of general supply contactor KM and the normally-closed contact of thermal relay FR, between the coil of the normally opened contact of relay K 2 and general supply contactor KM, be parallel with stop button TA, the parallel circuits of the normally opened contact of the normally opened contact of the coil of relay K 2 and relay K 1 and relay K 2, be connected with start button HA between mutually being connected in fuse FU2 that three-phase circuit C goes up mutually and B, resistance R 2, be connected with start button HA between mutually being connected in fuse FU2 that three-phase circuit C goes up mutually and C, diode VD, resistance R 1, between resistance R 1 and resistance R 2, be connected with the normally-closed contact of general supply contactor KM, the coil of relay K 1 and resistance R 3, be in series with the normally opened contact of resistance R 4 and general supply contactor KM at the two ends of the coil of relay K 1, two ends at the normally opened contact of resistance R 4 and general supply contactor KM are parallel with the series circuit of capacitor C 1 and capacitor C 2 and are parallel with voltage-stabiliser tube VS1 and the series circuit of voltage-stabiliser tube VS2, interconnect between capacitor C 1 and the capacitor C 2 and between voltage-stabiliser tube VS1 and the voltage-stabiliser tube VS2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102122556A CN101908851B (en) | 2010-06-29 | 2010-06-29 | Miniaturized crane safety starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102122556A CN101908851B (en) | 2010-06-29 | 2010-06-29 | Miniaturized crane safety starter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101908851A true CN101908851A (en) | 2010-12-08 |
| CN101908851B CN101908851B (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102122556A Expired - Fee Related CN101908851B (en) | 2010-06-29 | 2010-06-29 | Miniaturized crane safety starter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05207644A (en) * | 1992-01-22 | 1993-08-13 | Togami Electric Mfg Co Ltd | Starter for motor |
| US5448442A (en) * | 1988-06-22 | 1995-09-05 | Siemens Energy & Automation, Inc. | Motor controller with instantaneous trip protection |
| CN2395455Y (en) * | 1999-08-25 | 2000-09-06 | 四川石油管理局川东天然气净化总厂 | Automatic starting relay for motor instantaneous power-off |
| CN2744064Y (en) * | 2004-07-26 | 2005-11-30 | 刘琼 | Controller for electric machine |
| CN201733260U (en) * | 2010-06-29 | 2011-02-02 | 河南省电力公司许昌供电公司 | Safety starter of miniature crane |
-
2010
- 2010-06-29 CN CN2010102122556A patent/CN101908851B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5448442A (en) * | 1988-06-22 | 1995-09-05 | Siemens Energy & Automation, Inc. | Motor controller with instantaneous trip protection |
| JPH05207644A (en) * | 1992-01-22 | 1993-08-13 | Togami Electric Mfg Co Ltd | Starter for motor |
| CN2395455Y (en) * | 1999-08-25 | 2000-09-06 | 四川石油管理局川东天然气净化总厂 | Automatic starting relay for motor instantaneous power-off |
| CN2744064Y (en) * | 2004-07-26 | 2005-11-30 | 刘琼 | Controller for electric machine |
| CN201733260U (en) * | 2010-06-29 | 2011-02-02 | 河南省电力公司许昌供电公司 | Safety starter of miniature crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101908851B (en) | 2012-11-07 |
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: XUCHANG POWER SUPPLY COMPANY, STATE GRID HUNAN ELECTRIC POWER COMPANY Effective date: 20131114 Owner name: XUCHANG POWER SUPPLY COMPANY, STATE GRID HUNAN ELE Effective date: 20131114 |
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Owner name: XUCHANG POWER SUPPLY COMPANY, STATE GRID HUNAN ELE Free format text: FORMER NAME: XUCHANG POWER SUPPLY COMPANY OF HENAN ELECTRIC POWER COMPANY;XJ ELECTRIC CO., LTD. |
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Address after: No. 288 Xuchang City, Henan province 461000 City Road Patentee after: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Address before: No. 288 Xuchang City, Henan province 461000 City Road Patentee before: Xuchang Power Supply Company of Henan Electric Power Co. |
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Effective date of registration: 20131114 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Address before: No. 288 Xuchang City, Henan province 461000 City Road Patentee before: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |