CN105692473A - Tower crane and rotation power loss protection device - Google Patents
Tower crane and rotation power loss protection device Download PDFInfo
- Publication number
- CN105692473A CN105692473A CN201610243186.2A CN201610243186A CN105692473A CN 105692473 A CN105692473 A CN 105692473A CN 201610243186 A CN201610243186 A CN 201610243186A CN 105692473 A CN105692473 A CN 105692473A
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- CN
- China
- Prior art keywords
- circuit
- turning motor
- switch
- protecting device
- dead electricity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
- B66C23/94—Safety gear for limiting slewing movements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
- B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
The invention discloses a rotation power loss protection device and a tower crane. The rotation power loss protection device comprises a storage batter, a first switch, a second switch, a rotation motor brake coil circuit, a follow current wave-proof circuit and a power loss emergency protection circuit, wherein the rotation motor brake coil circuit, the follow current wave-proof circuit and the power loss emergency protection circuit are arranged in parallel; the cathode of the storage battery is connected with the input end of the follow current wave-proof circuit and the output end of the rotation motor brake coil circuit; the anode of the storage battery is connected with the output end of the follow current wave-proof circuit and the input end of the rotation motor brake coil circuit; when the tower crane normally works, the first switch is turned on, and is automatically turned off after power loss; when the tower crane normally works, the second switch is turned off, and is turned on in a delayed manner after power loss; and the power loss emergency protection circuit is used for keeping a disc brake of the tower crane in an open state when the tower crane suddenly loses power. The rotation power loss protection device has the advantage that after sudden power failure, a rotation mechanism automatically, safely, quickly and softly stops, so that collision accidents and whole machine impact are avoided.
Description
Technical field
The present invention relates to engineering machinery field, particularly to a kind of derrick crane and revolution loss protecting device。
Background technology
Tower crane rotation braking is divided into opens wide braking and normally closed braking two kinds, brakes, brake during normally engaged brake coil blackout during normally disengaged brake coil electricity。When not in use for wind resistance, derrick crane must release rotary braking, and normally disengaged brake power-off automatically terminates braking, must manually release braking, otherwise run into strong wind easily accidents caused after normally engaged brake power-off。So major part derrick crane all adopts normally disengaged brake。In order to pin revolution when not having electric, the derrick crane of the normally opened braking of part can be equipped with the accumulator stand-by power supply as trainstop。No matter being normally disengaged brake or normally engaged brake, generally all adopt disk brake, after braking, slew gear can be at once locked。
If derrick crane is unexpected power-off in high speed gyration, the derrick crane being equipped with normally engaged brake can because of restraining coil dead electricity rotary braking at once, slew gear can by locked suddenly under high-speed motion, crane arm, counter-jib huge inertia can cause violent impact, cause whole tower crane to include crane arm, acutely the rocking of suspension hook, have a strong impact on equipment and the safety of periphery personnel；It is equipped with the derrick crane of normally disengaged brake because of coil losing electricity, lose rotary braking ability, crane arm, suspension hook and hang thing and be likely to bump against the dangers such as operating personnel, building and high tension cable under out of control under effect of inertia, if the derrick crane of normally disengaged brake is equipped with accumulator, can not brake when revolving high-speed operates, the danger that the unexpected dead electricity of same normally engaged brake is the same otherwise can occur。
In sum; how to provide a kind of less investment, safe and reliable and when running up after power-off can the quickly soft revolution loss protecting device making slew gear stop and the derrick crane including this revolution loss protecting device, become those skilled in the art to need badly and solved the technical problem that。
Summary of the invention
In view of this, the present invention proposes a kind of derrick crane and revolution loss protecting device, to solve in derrick crane revolution at a high speed uncontrollable, the problem that there is potential safety hazard after power-off suddenly。
On the one hand; the invention provides a kind of revolution loss protecting device; for derrick crane; described revolution loss protecting device includes accumulator, the first switch, second switch, turning motor restraining coil circuit, afterflow wave resistance circuit and dead electricity emergency protection circuit; wherein, described turning motor restraining coil circuit, afterflow wave resistance circuit and dead electricity emergency protection circuit in parallel are arranged；The negative pole of described accumulator is connected with afterflow wave resistance circuit input end, and the positive pole of described accumulator is connected with afterflow wave resistance circuit output end；The positive pole of described accumulator is connected with turning motor restraining coil circuit input end, and the negative pole of described accumulator is connected with turning motor restraining coil circuit output end；Described first switch and second switch are arranged in series between accumulator and turning motor restraining coil circuit, and described first switch is opened when derrick crane normal operation, automatically closes after dead electricity；Described second switch closes when derrick crane normal operation, Time Delay Opening after dead electricity；Described dead electricity emergency protection circuit is for when the unexpected dead electricity of derrick crane, and the disk brake of derrick crane is maintained at the state of opening a sluice gate。
Further; described dead electricity emergency protection circuit includes the normally closed type trainstop coil and the normally closed type trainstop retarder brake circuit that are arranged in parallel; described normally closed type trainstop retarder brake circuit is for when the unexpected dead electricity of derrick crane, it is ensured that disk brake timing closing。
Further, described normally closed type trainstop retarder brake circuit includes the capacitor and the resistance that are arranged in series。
Further, described dead electricity emergency protection circuit includes trainstop coil open in usual。
Further, described afterflow wave resistance circuit includes diode and resistance, described diode and resistant series connection。
Further, described turning motor restraining coil circuit includes diode and turning motor restraining coil, described diode and turning motor restraining coil and is arranged in series。
Further, described turning motor restraining coil is turning motor eddy-current brake coil。
Further, described turning motor restraining coil is turning motor DC injection braking coil。
Further, described dead electricity emergency protection circuit has also been arranged in series diode。
On the other hand, the present invention also provides for a kind of derrick crane being equiped with this revolution loss protecting device, and described revolution loss protecting device is the revolution loss protecting device on it described in any one。
The revolution loss protecting device of said structure and derrick crane; including accumulator, the first switch, second switch, turning motor restraining coil circuit, afterflow wave resistance circuit and dead electricity emergency protection circuit; wherein, described turning motor restraining coil circuit, afterflow wave resistance circuit and dead electricity emergency protection circuit in parallel are arranged；The negative pole of described accumulator is connected with afterflow wave resistance circuit input end, and the positive pole of described accumulator is connected with afterflow wave resistance circuit output end；The positive pole of described accumulator is connected with turning motor restraining coil circuit input end, and the negative pole of described accumulator is connected with turning motor restraining coil circuit output end；Described first switch and second switch are arranged in series between accumulator and turning motor restraining coil circuit, and described first switch is opened when derrick crane normal operation, automatically closes after dead electricity；Described second switch closes when derrick crane normal operation, Time Delay Opening after dead electricity；Described dead electricity emergency protection circuit is for when the unexpected dead electricity of derrick crane, and the disk brake of derrick crane is maintained at the state of opening a sluice gate。The revolution loss protecting device of this structure, on the one hand when derrick crane turns round unexpected power-off at a high speed, can promptly make revolution stop by automatic safe, it is to avoid possible danger；On the other hand, Time Delay Opening after second switch dead electricity, can avoid accumulator always to turning motor restraining coil and trainstop coil power supply, save accumulator electric-quantity, extend use time and the life-span of accumulator。
Accompanying drawing explanation
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention。In the accompanying drawings:
Fig. 1 is the circuit diagram that the present invention turns round loss protecting device one embodiment；
Fig. 2 is the circuit diagram that the present invention turns round another embodiment of loss protecting device；
Fig. 3 is the circuit diagram that the present invention turns round loss protecting device another embodiment。
Description of reference numerals
1 accumulator
2 first switches
3 second switches
4 turning motor eddy-current brake coils
5 afterflow anti-surge circuits
6 normally closed type trainstop coils
7 normally closed type trainstop retarder brake circuit
8 trainstop coils open in usual
9 diodes
10 resistance
11 capacitors
12 turning motor DC injection braking coils
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined。Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail。
The basic thought of the present invention is in that: for uncontrollable after power-off suddenly in overcoming derrick crane to turn round at a high speed, there is the deficiency of potential safety hazard, the invention provides a kind of revolution loss protecting device, in this revolution loss protecting device, dead electricity emergency protection circuit is for when the unexpected dead electricity of derrick crane, the disk brake of derrick crane is maintained at the state of opening a sluice gate, so, when tower type crane slewing gear runs up, the slew gear that makes that can be quickly soft after power-off stops, effectively prevent the generation of the shock accident caused because of inertia, and less investment, safe and reliable。
Below in conjunction with Fig. 1 to Fig. 3, the preferred embodiments of the present invention are described in further detail。
As shown in Figure 1 to Figure 3; a kind of revolution loss protecting device; for derrick crane; including accumulator the 1, first switch 2, second switch 3, turning motor restraining coil circuit, afterflow anti-surge circuit 5 and dead electricity emergency protection circuit; wherein, turning motor restraining coil circuit, afterflow anti-surge circuit 5 and dead electricity emergency protection circuit in parallel are arranged；The negative pole of accumulator 1 is connected with afterflow anti-surge circuit 5 input, and the positive pole of accumulator 1 is connected with afterflow anti-surge circuit 5 outfan；The positive pole of accumulator 1 is connected with turning motor restraining coil circuit input end, and the negative pole of accumulator 1 is connected with turning motor restraining coil circuit output end；First switch 2 and second switch 3 are arranged in series between accumulator 1 and turning motor restraining coil circuit, and the first switch 2 is opened when derrick crane normal operation, automatically closes after dead electricity；Second switch 3 closes when derrick crane normal operation, Time Delay Opening after dead electricity；Dead electricity emergency protection circuit is for when the unexpected dead electricity of derrick crane, and the disk brake of derrick crane is maintained at the state of opening a sluice gate。By above-mentioned setting, the unexpected loss protecting under derrick crane revolution at a high speed can be realized。
In the embodiment shown in Fig. 1; dead electricity emergency protection circuit includes the normally closed type trainstop coil 6 and the normally closed type trainstop retarder brake circuit 7 that are arranged in parallel; normally closed type trainstop retarder brake circuit 7 is for when the unexpected dead electricity of derrick crane, it is ensured that disk brake timing closing。Preferably, this normally closed type trainstop retarder brake circuit 7 includes the capacitor 11 and the resistance 10 that are arranged in series。
In technical scheme further, afterflow anti-surge circuit 5 includes diode 9 and resistance 10, diode 9 and resistance 10 and is connected in series；Turning motor restraining coil circuit includes diode 9 and turning motor restraining coil, diode 9 and turning motor restraining coil and is arranged in series；Meanwhile, dead electricity emergency protection circuit has also been arranged in series diode 9。Preferably, aforementioned turning motor restraining coil is turning motor eddy-current brake coil 4。
When derrick crane normal operation (i.e. revolution at a high speed), the disk brake of derrick crane is in the state of opening a sluice gate, and now, the first switch 2 is in open mode, second switch 3 is in closure state。When the power supply of derrick crane has a power failure suddenly, the first switch 2 Guan Bi, second switch 3 remains in that Guan Bi before time delay terminates, and starts countdown, and now, accumulator 1 starts to power to turning motor eddy-current brake coil 4, normally closed type trainstop coil 6。In the embodiment shown in fig. 1, what the slew gear of derrick crane adopted is normally engaged brake, and now, the disk brake of derrick crane continues maintenance under the combined effect of normally closed type trainstop retarder brake circuit 7 and accumulator 1 and opens a sluice gate state；Turning motor eddy-current brake coil 4 electric after start rapidly slew gear retarding braking, after time enough, slew gear stops operating under turning motor eddy-current brake coil effect, second switch 3 countdown terminates, second switch 3 disconnects, turning motor eddy-current brake coil 4 and normally closed type trainstop coil 6 power-off, accumulator 1 stops powering to turning motor eddy-current brake coil 4 and normally closed type trainstop coil 6, to save accumulator electric-quantity。So far, the present invention is complete the protection to dead electricity unexpected in derrick crane high speed revolution situation, stopping of slew gear safety and steady。
In the embodiment shown in Figure 2, what the slew gear of derrick crane adopted is normally disengaged brake, dead electricity emergency protection circuit includes trainstop coil 8 open in usual, for normally disengaged brake, after the unexpected dead electricity of derrick crane, the disk brake of derrick crane is in the state of opening a sluice gate, first switch 2 Guan Bi, second switch 3 remains closed before time delay terminates, turning motor eddy-current brake coil 4 is charged by accumulator 1, slew gear smoothly can be carried out braking soft safely and fast by the energising of turning motor eddy-current brake coil 4, after time enough, slew gear stops operating under turning motor eddy-current brake coil 4 acts on, second switch 3 countdown terminates, second switch 3 disconnects, turning motor eddy-current brake coil 4 power-off, accumulator 1 stops powering to turning motor eddy-current brake coil 4, to save accumulator electric-quantity。
It should be noted that in the present invention, turning motor eddy-current brake coil 4 can be replaced by turning motor DC injection braking coil 12。Fig. 3 is the circuit diagram turning round loss protecting device when turning motor restraining coil is turning motor DC injection braking coil 12。
In sum; the revolution loss protecting device of the present invention; including accumulator the 1, first switch 2, second switch 3, turning motor restraining coil circuit, afterflow anti-surge circuit 5 and dead electricity emergency protection circuit; during derrick crane normal operation; first switch 2 is opened; second switch 3 is Guan Bi, does not affect the normal use of turning motor eddy-current brake coil 4 and disk brake；After derrick crane dead electricity, the first switch 2 Guan Bi, second switch 3 remains closed when time delay terminates。For normally engaged brake, brake will not dead electricity be closed a floodgate at once to adopt normally closed type trainstop retarder brake circuit 7 to ensure, then start to be opened a sluice gate state by what accumulator 1 maintained normally closed type trainstop coil 6 after the first switch 2 Guan Bi, accumulator 1 starts to supply electricity to turning motor eddy-current brake coil 4, and slew gear is braked stopping by turning motor eddy-current brake coil 4；For normally disengaged brake, the unexpected dead electricity rear brake of derrick crane is in the state of opening a sluice gate, and only can need to brake stopping smoothly to the energising of turning motor eddy-current brake coil 4。After slew gear stops, second switch 3 disconnects, and can save the electricity of accumulator 1。
On the other hand, present invention also offers a kind of derrick crane, including revolution loss protecting device, this revolution loss protecting device is revolution loss protecting device described on it。Other structures of derrick crane can refer to prior art, repeats no more herein。
The derrick crane of the present invention obviously also has whole beneficial effects of aforementioned revolution loss protecting device, and when derrick crane turns round unexpected power-off at a high speed, revolution loss protecting device can make revolution stop by automatic safe rapidly, it is to avoid danger that may be present；Second switch 3 can avoid accumulator 1 always to turning motor restraining coil and trainstop coil power supply, saves the electricity of accumulator 1, extends use time and the life-span of accumulator 1。
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。
Claims (10)
1. a revolution loss protecting device; for derrick crane; it is characterized in that: include accumulator (1), the first switch (2), second switch (3), turning motor restraining coil circuit, afterflow anti-surge circuit (5) and dead electricity emergency protection circuit; wherein
Described turning motor restraining coil circuit, afterflow anti-surge circuit (5) and dead electricity emergency protection circuit in parallel are arranged；
The negative pole of described accumulator (1) is connected with afterflow anti-surge circuit (5) input, and the positive pole of described accumulator (1) is connected with afterflow anti-surge circuit (5) outfan；
The positive pole of described accumulator (1) is connected with turning motor restraining coil circuit input end, and the negative pole of described accumulator (1) is connected with turning motor restraining coil circuit output end；
Described first switch (2) and second switch (3) are arranged in series between accumulator (1) and turning motor restraining coil circuit, described first switch (2) is opened when derrick crane normal operation, automatically closes after dead electricity；Described second switch (3) closes when derrick crane normal operation, Time Delay Opening after dead electricity；
Described dead electricity emergency protection circuit is for when the unexpected dead electricity of derrick crane, and the disk brake of derrick crane is maintained at the state of opening a sluice gate。
2. turn round loss protecting device as claimed in claim 1; it is characterized in that: described dead electricity emergency protection circuit includes normally closed type trainstop coil (6) and normally closed type trainstop retarder brake circuit (7) that are arranged in parallel; described normally closed type trainstop retarder brake circuit (7) is for when the unexpected dead electricity of derrick crane, it is ensured that disk brake timing closing。
3. turn round loss protecting device as claimed in claim 2, it is characterised in that: described normally closed type trainstop retarder brake circuit (7) includes the capacitor (11) and the resistance (10) that are arranged in series。
4. turn round loss protecting device as claimed in claim 1, it is characterised in that: described dead electricity emergency protection circuit includes trainstop coil (8) open in usual。
5. the revolution loss protecting device as according to any one of Claims 1-4; it is characterized in that: described afterflow anti-surge circuit (5) includes diode (9) and resistance (10), described diode (9) and resistance (10) and is connected in series。
6. the revolution loss protecting device as according to any one of Claims 1-4; it is characterized in that: described turning motor restraining coil circuit includes diode (9) and turning motor restraining coil, and described diode (9) and turning motor restraining coil are arranged in series。
7. turn round loss protecting device as claimed in claim 6, it is characterised in that: described turning motor restraining coil is turning motor eddy-current brake coil (4)。
8. turn round loss protecting device as claimed in claim 6, it is characterised in that: described turning motor restraining coil is turning motor DC injection braking coil (12)。
9. the revolution loss protecting device as according to any one of Claims 1-4, it is characterised in that: described dead electricity emergency protection circuit has also been arranged in series diode (9)。
10. a derrick crane, including revolution loss protecting device, it is characterised in that: described revolution loss protecting device is the revolution loss protecting device according to any one of claim 1 to 9。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610243186.2A CN105692473B (en) | 2016-04-19 | 2016-04-19 | Derrick crane and revolution loss protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610243186.2A CN105692473B (en) | 2016-04-19 | 2016-04-19 | Derrick crane and revolution loss protecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105692473A true CN105692473A (en) | 2016-06-22 |
| CN105692473B CN105692473B (en) | 2017-07-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610243186.2A Active CN105692473B (en) | 2016-04-19 | 2016-04-19 | Derrick crane and revolution loss protecting device |
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| Country | Link |
|---|---|
| CN (1) | CN105692473B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106744402A (en) * | 2017-03-14 | 2017-05-31 | 苏州蓝王机床工具科技有限公司 | Tower crane rotation dead electricity control system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2104852U (en) * | 1991-10-26 | 1992-05-20 | 郑州铁路局郑州装卸机械厂 | Delayed spot-acting brake controller of crane |
| CN2360380Y (en) * | 1999-02-04 | 2000-01-26 | 秦康 | Anti-locking and wind-proof controller |
| CN1654304A (en) * | 2005-02-01 | 2005-08-17 | 太原重型机械集团有限公司 | Lifting mechanism braking system of hoister |
| CN1843885A (en) * | 2006-03-21 | 2006-10-11 | 牡丹江建工机械有限责任公司 | Slewing normally disengaged brake circuit of tower crane having emergent braking function in power turn-off situation |
| CA2655334A1 (en) * | 2006-06-13 | 2007-12-21 | Railpower Technologies Corp. | Load-lifting apparatus and method of storing energy for the same |
| CN104098027A (en) * | 2014-07-11 | 2014-10-15 | 江苏永钢集团有限公司 | Driving cart brake delay braking circuit |
-
2016
- 2016-04-19 CN CN201610243186.2A patent/CN105692473B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2104852U (en) * | 1991-10-26 | 1992-05-20 | 郑州铁路局郑州装卸机械厂 | Delayed spot-acting brake controller of crane |
| CN2360380Y (en) * | 1999-02-04 | 2000-01-26 | 秦康 | Anti-locking and wind-proof controller |
| CN1654304A (en) * | 2005-02-01 | 2005-08-17 | 太原重型机械集团有限公司 | Lifting mechanism braking system of hoister |
| CN1843885A (en) * | 2006-03-21 | 2006-10-11 | 牡丹江建工机械有限责任公司 | Slewing normally disengaged brake circuit of tower crane having emergent braking function in power turn-off situation |
| CA2655334A1 (en) * | 2006-06-13 | 2007-12-21 | Railpower Technologies Corp. | Load-lifting apparatus and method of storing energy for the same |
| CN104098027A (en) * | 2014-07-11 | 2014-10-15 | 江苏永钢集团有限公司 | Driving cart brake delay braking circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106744402A (en) * | 2017-03-14 | 2017-05-31 | 苏州蓝王机床工具科技有限公司 | Tower crane rotation dead electricity control system |
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| CN105692473B (en) | 2017-07-18 |
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Effective date of registration: 20190920 Address after: 410604 West 168 Jinzhou Avenue, Ningxiang High-tech Industrial Park, Changsha City, Hunan Province Patentee after: Hunan Sanyi Tower Lifting Machinery Co., Ltd. Address before: 410600, No. 168, Jinzhou Avenue, Jinzhou new district, Hunan, Changsha Patentee before: Sany Mobile Cranes Co., Ltd. |
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