CN102689836A - Control equipment, method, system, and engineering machinery for brake failure protection of crane - Google Patents
Control equipment, method, system, and engineering machinery for brake failure protection of crane Download PDFInfo
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- CN102689836A CN102689836A CN2012101896027A CN201210189602A CN102689836A CN 102689836 A CN102689836 A CN 102689836A CN 2012101896027 A CN2012101896027 A CN 2012101896027A CN 201210189602 A CN201210189602 A CN 201210189602A CN 102689836 A CN102689836 A CN 102689836A
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- frequency converter
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- outgoing current
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Abstract
The invention discloses control equipment, a method, a system, and engineering machinery for brake failure protection of crane. The crane comprises a frequency converter and a motor driven by the frequency converter to lift a weight. The control equipment comprises a receiving device and a control device, wherein the receiving device is used for receiving signals representing whether the motor rotates or not and signals representing whether the frequency converter has output current or not, and the control device is used for controlling the frequency converter to drive the motor at a preset rotating speed to lower the weight to a preset position under the conditions that the frequency converter has no output current and the motor rotates, and is used for controlling the frequency converter to stop driving the motor when the output current of the frequency converter is equal to the output current of the frequency converter when the motor is in an idler load. Through the technical scheme, whether the weight is lowered to the preset position or not can be judged, and the situation that the motor is driven by the frequency converter to rotate towards one direction can be prevented, so that a steel wire rope is fully released and then is hoisted in return to re-lift the weight.
Description
Technical field
The present invention relates to engineering machinery field, particularly, relate to a kind of braking failure protection control convenience, method, system and construction machinery and equipment that is used for hoisting crane.
Background technology
Generally speaking, hoisting crane comprise frequency converter and receive that this frequency converter drives to promote the motor of weight.In the hoisting crane actual moving process, need weight be suspended in the air sometimes, this moment, motor did not provide moment, and weight is braked by drg and is kept static.If slide ditch situation will take place misfunctioning of brake, cause safety misadventure.
Summary of the invention
The purpose of this invention is to provide a kind of braking failure protection control convenience, method, system and construction machinery and equipment that is used for hoisting crane, the safety problem that it is caused in the time of can effectively solving misfunctioning of brake.
To achieve these goals; The present invention provides a kind of braking failure protection control convenience that is used for hoisting crane; The motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight; This control convenience comprises: receiving device is used to receive the signal whether signal that whether the said motor of representative rotate and said frequency converter exist outgoing current; Control setup is used under said frequency converter does not have situation that outgoing current and said motor rotate, controls said frequency converter and drives said motor and move with a desired speed, so that said weight is reduced to the desired location; And during the outgoing current when the outgoing current of said frequency converter equals said frequency converter in said empty load of motor, control said frequency converter and stop to drive said motor.
Correspondingly; The present invention also provides a kind of braking failure protection control method that is used for hoisting crane; The motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight, this control method comprises: the signal whether the signal whether said motor of reception representative rotates and said frequency converter exist outgoing current; Under said frequency converter does not have situation that outgoing current and said motor rotate, control said frequency converter and drive said motor and move, so that said weight is reduced to the desired location with a desired speed; And during the outgoing current when the outgoing current of said frequency converter equals said frequency converter in said empty load of motor, control said frequency converter and stop to drive said motor.
Correspondingly, the present invention also provides a kind of braking failure protection system that is used for hoisting crane, the motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight, and this system comprises: speed detecting unit is used to detect said rotating speed of motor; Current sensing means is used to detect the outgoing current of said frequency converter; And above-mentioned control convenience.
Pass through technique scheme; Can whether motor rotates and whether frequency converter exists output to judge whether drg lost efficacy through detecting; If misfunctioning of brake; Then the frequency converter outgoing current is with drive motor, thereby makes weight to reduce to the desired location with a predetermined speed, avoids weight to lose pulling force fully and drops.In addition; Through the outgoing current of frequency converter and this frequency converter outgoing current when the said empty load of motor is compared; Whether landed is to the desired location can to judge weight; Can effectively avoid the generation of this situation: the frequency converter drive motor is always towards the rotation of direction, thus steel rope all emit after hoisting rope conversely again, the weight of slinging again.
Other features and advantages of the present invention will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification sheets, is used to explain the present invention with the following specific embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the constructional drawing that is used for the braking failure protection control convenience of hoisting crane provided by the invention;
Fig. 2 is the diagram of circuit that is used for the braking failure protection control method of hoisting crane provided by the invention; And
Fig. 3 is the constructional drawing that is used for the braking failure protection control system of hoisting crane provided by the invention.
Description of reference numerals
10 receiving devices, 20 control setups
100 frequency converters, 200 coders
300 motors, 400 emergency power supply systems
500 main electric power system 600 warning devices
The specific embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that the specific embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
Fig. 1 is the constructional drawing that is used for the braking failure protection control convenience of hoisting crane provided by the invention.As shown in Figure 1; The invention provides a kind of braking failure protection control convenience that is used for hoisting crane; The motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight; This control convenience comprises: receiving device is used to receive the signal whether signal that whether the said motor of representative rotate and said frequency converter exist outgoing current; And control setup; Be used for not having under the situation of outgoing current and the rotation of said motor at said frequency converter; Control said frequency converter and drive said motor and move, said weight is reduced to desired location (for example, ground or other perchs) with a desired speed; And during the outgoing current when the outgoing current of said frequency converter equals said frequency converter in said empty load of motor, control said frequency converter and stop to drive said motor.By this; Can whether motor rotates and whether frequency converter exists output to judge whether drg lost efficacy through detecting; If misfunctioning of brake; Then the frequency converter outgoing current is with drive motor, thereby makes weight to reduce to the desired location with a predetermined speed, avoids weight to lose pulling force fully and drops.In addition; Through the outgoing current of frequency converter and this frequency converter outgoing current when the said empty load of motor is compared; Whether landed is to the desired location can to judge weight; Can effectively avoid the generation of this situation: the frequency converter drive motor is always towards the rotation of direction, thus steel rope all emit after hoisting rope conversely again, the weight of slinging again.
Preferably, said control setup also can not have to start emergency power supply system under the situation of output and the rotation of said motor at said frequency converter.By this, can avoid the people is that maloperation has been turn-offed main electric power system (for example, pressing scram button) and caused control setup can't carry out the braking failure defence program.
Preferably, drive said motor with a desired speed run duration at the said frequency converter of control: said receiving device also receives and hoists or the step-down operation instruction; And said control setup is also controlled said frequency converter and is driven said motor and carry out and hoist with this or corresponding action is instructed in step-down operation.By this, can make the people to get involved at any time, make things convenient for the manual control weight to drop to perch.Also can limit frequency converter and drive said rotating speed of motor this moment, only allows it with low cruise, guarantees safety.
Preferably; Controlling said frequency converter at said control setup drives said motor and carries out and hoist with this or step-down operation is instructed after the corresponding action; If the outgoing current of said frequency converter is greater than the outgoing current of said frequency converter when the said empty load of motor (show that weight do not reduce to perch); The said frequency converter of said control setup continuation control drives said motor and moves with a desired speed, so that said weight is reduced to the desired location.By this, the operation that can reduce to perch at the manual control weight imperfect tense continues the automatic guidance weight and reduces to perch.
Preferably, said control setup also is used under said frequency converter does not have situation that outgoing current and said motor rotate, sending alerting signal.Forms such as this alerting signal can sound, light appear.By this, can remind the staff to note misfunctioning of brake, prevent that to take measures necessary safety misadventure from taking place, for example evacuation crowd etc.
Correspondingly; As shown in Figure 2; The present invention also provides a kind of braking failure protection control method that is used for hoisting crane; The motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight, this control method comprises: the signal whether the signal whether said motor of reception representative rotates and said frequency converter exist outgoing current; Under said frequency converter does not have situation that outgoing current and said motor rotate, control said frequency converter and drive said motor and move, so that said weight is reduced to the desired location with a desired speed; And during the outgoing current when the outgoing current of said frequency converter equals said frequency converter in said empty load of motor, control said frequency converter and stop to drive said motor.
Wherein, this method also can comprise: do not have at said frequency converter to start emergency power supply system under the situation of output and the rotation of said motor.
Wherein, drive said motor with a desired speed run duration at the said frequency converter of control, this method also comprises: reception hoists or the step-down operation instruction; And control said frequency converter and drive said motor and carry out and hoist with this or corresponding action is instructed in step-down operation.
Wherein, Controlling said frequency converter at said control setup drives said motor and carries out and hoist with this or step-down operation is instructed after the corresponding action; If the outgoing current of said frequency converter is greater than the outgoing current of said frequency converter when the said empty load of motor; This method also comprises: control said frequency converter and drive said motor and move with a desired speed, so that said weight is reduced to the desired location.
Wherein, this method also comprises: do not have at said frequency converter to send alerting signal under the situation of outgoing current and the rotation of said motor.
Corresponding about the detail and the benefit of this braking failure protection control method with above-mentioned braking failure protection control convenience, repeat no more in this.
Correspondingly; As shown in Figure 3; The present invention also provides a kind of braking failure protection system that is used for hoisting crane, the motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight, and this system comprises: speed detecting unit is (for example; Various types of coders), be used to detect said rotating speed of motor; Current sensing means (this function can be realized by frequency converter self, or realize through current sensor is set separately) is used to detect the outgoing current of said frequency converter; And above-mentioned control convenience.
Said current sensing means and control convenience are realized by said frequency converter.Because frequency converter itself has certain logic function, it can realize certain controllable function, by this, can reduce the use of components and parts, saves cost.Particularly, frequency converter 100 can receive the electric power of autonomous electric power system 500, and utilizes this electric power to come drive motor 300.When learning motor 300 rotations when this frequency converter no current output and through coder 200, it can start emergency power supply system 400, and sends alerting signal to warning device 600, thereby carries out the braking failure protection.
Correspondingly, the present invention also provides a kind of construction machinery and equipment, and this project machinery comprises above-mentioned braking failure protection system.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned embodiment; In technical conceive scope of the present invention, can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (13)
1. a braking failure that is used for hoisting crane is protected control convenience, the motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight, and this control convenience comprises:
Receiving device is used to receive the signal whether signal that whether the said motor of representative rotate and said frequency converter exist outgoing current;
Control setup is used under said frequency converter does not have situation that outgoing current and said motor rotate, controls said frequency converter and drives said motor and move with a desired speed, so that said weight is reduced to the desired location; And during the outgoing current when the outgoing current of said frequency converter equals said frequency converter in said empty load of motor, control said frequency converter and stop to drive said motor.
2. equipment according to claim 1 is characterized in that, said control setup also is used for there is not under the situation of output and the rotation of said motor the startup emergency power supply system at said frequency converter.
3. equipment according to claim 1 is characterized in that, drives said motor with a desired speed run duration at the said frequency converter of control,
Said receiving device also receives and hoists or the step-down operation instruction;
Said control setup is also controlled said frequency converter and is driven said motor and carry out and hoist with this or corresponding action is instructed in step-down operation.
4. equipment according to claim 3; It is characterized in that; Controlling said frequency converter at said control setup drives said motor and carries out and hoist with this or step-down operation is instructed after the corresponding action; If the outgoing current of said frequency converter is greater than the outgoing current of said frequency converter when the said empty load of motor, said control setup continues the said frequency converter of control and drives said motor and move with a desired speed, so that said weight is reduced to the desired location.
5. equipment according to claim 1 is characterized in that, said control setup also is used under said frequency converter does not have situation that outgoing current and said motor rotate, sending alerting signal.
6. a braking failure that is used for hoisting crane is protected control method, the motor that said hoisting crane comprises frequency converter and driven by this frequency converter with the lifting weight, and this control method comprises:
The signal whether the signal whether said motor of reception representative rotates and said frequency converter exist outgoing current;
Under said frequency converter does not have situation that outgoing current and said motor rotate, control said frequency converter and drive said motor and move, so that said weight is reduced to the desired location with a desired speed; And during the outgoing current when the outgoing current of said frequency converter equals said frequency converter in said empty load of motor, control said frequency converter and stop to drive said motor.
7. method according to claim 6 is characterized in that, this method also comprises:
Do not have at said frequency converter to start emergency power supply system under the situation of output and the rotation of said motor.
8. method according to claim 6 is characterized in that, drives said motor with a desired speed run duration at the said frequency converter of control, and this method also comprises:
Reception hoists or the step-down operation instruction; And
Controlling said frequency converter drives said motor and carries out and hoist with this or corresponding action is instructed in step-down operation.
9. method according to claim 8; It is characterized in that; Controlling said frequency converter at said control setup drives said motor and carries out and hoist with this or step-down operation is instructed after the corresponding action; If the outgoing current of said frequency converter is greater than the outgoing current of said frequency converter when the said empty load of motor, this method also comprises: control said frequency converter and drive said motor and move with a desired speed, so that said weight is reduced to the desired location.
10. method according to claim 6 is characterized in that, this method also comprises:
Do not have at said frequency converter to send alerting signal under the situation of outgoing current and the rotation of said motor.
11. the motor with the lifting weight that a braking failure protection system that is used for hoisting crane, said hoisting crane comprise frequency converter and driven by this frequency converter, this system comprises:
Speed detecting unit is used to detect said rotating speed of motor;
Current sensing means is used to detect the outgoing current of said frequency converter; And
According to the described control convenience of each claim among the claim 1-5.
12. system according to claim 11 is characterized in that, said current sensing means and control convenience are realized by said frequency converter.
13. a construction machinery and equipment is characterized in that, this project machinery comprises according to claim 11 or 12 described systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210189602 CN102689836B (en) | 2012-06-08 | 2012-06-08 | Control equipment, method, system, and engineering machinery for brake failure protection of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210189602 CN102689836B (en) | 2012-06-08 | 2012-06-08 | Control equipment, method, system, and engineering machinery for brake failure protection of crane |
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| CN102689836A true CN102689836A (en) | 2012-09-26 |
| CN102689836B CN102689836B (en) | 2013-03-06 |
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| CN 201210189602 Active CN102689836B (en) | 2012-06-08 | 2012-06-08 | Control equipment, method, system, and engineering machinery for brake failure protection of crane |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407896A (en) * | 2013-08-28 | 2013-11-27 | 苏州汇川技术有限公司 | Brake time sequence control method of crane and frequency converter |
| CN103663225A (en) * | 2013-12-04 | 2014-03-26 | 中联重科股份有限公司 | Brake failure protection method, device and system and crane |
| CN104355235A (en) * | 2014-10-30 | 2015-02-18 | 中联重科股份有限公司 | Control method and control device for hoisting mechanism and hoisting mechanism |
| CN105515487A (en) * | 2015-12-30 | 2016-04-20 | 武汉港迪电气传动技术有限公司 | Rotating speed tracking system of rotary mechanism |
| CN107265326A (en) * | 2017-07-12 | 2017-10-20 | 中国电建集团核电工程公司 | Electric travelling crane hoisting mechanism braking ability early warning system |
| CN112158561A (en) * | 2020-09-29 | 2021-01-01 | 国电泉州热电有限公司 | System and method for determining fault point of coal feeder |
| WO2023272573A1 (en) * | 2021-06-30 | 2023-01-05 | 深圳市英威腾电气股份有限公司 | Contracting-brake failure protection method and apparatus |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407896A (en) * | 2013-08-28 | 2013-11-27 | 苏州汇川技术有限公司 | Brake time sequence control method of crane and frequency converter |
| CN103663225A (en) * | 2013-12-04 | 2014-03-26 | 中联重科股份有限公司 | Brake failure protection method, device and system and crane |
| CN103663225B (en) * | 2013-12-04 | 2016-01-27 | 中联重科股份有限公司 | The protection system of misfunctioning of brake and hoisting crane |
| CN104355235A (en) * | 2014-10-30 | 2015-02-18 | 中联重科股份有限公司 | Control method and control device for hoisting mechanism and hoisting mechanism |
| CN105515487A (en) * | 2015-12-30 | 2016-04-20 | 武汉港迪电气传动技术有限公司 | Rotating speed tracking system of rotary mechanism |
| CN105515487B (en) * | 2015-12-30 | 2018-02-23 | 武汉港迪电气传动技术有限公司 | A kind of rotating-speed tracking system of rotating mechanism |
| CN107265326A (en) * | 2017-07-12 | 2017-10-20 | 中国电建集团核电工程公司 | Electric travelling crane hoisting mechanism braking ability early warning system |
| CN107265326B (en) * | 2017-07-12 | 2023-01-03 | 中国电建集团核电工程公司 | Braking performance early warning system for hoisting mechanism of electric crane |
| CN112158561A (en) * | 2020-09-29 | 2021-01-01 | 国电泉州热电有限公司 | System and method for determining fault point of coal feeder |
| CN112158561B (en) * | 2020-09-29 | 2022-04-01 | 国能(泉州)热电有限公司 | System and method for determining fault point of coal feeder |
| WO2023272573A1 (en) * | 2021-06-30 | 2023-01-05 | 深圳市英威腾电气股份有限公司 | Contracting-brake failure protection method and apparatus |
Also Published As
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|---|---|
| CN102689836B (en) | 2013-03-06 |
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Address after: 415106 Dingcheng City, Changde Province, the town of irrigation district ZOOMLION Creek Industrial Park Patentee after: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. Address before: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee before: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. |
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Address after: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee after: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. Address before: 415106 Dingcheng City, Changde Province, the town of irrigation district ZOOMLION Creek Industrial Park Patentee before: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. |