CN203865911U - Electrical emergency control circuit of tower crane - Google Patents
Electrical emergency control circuit of tower crane Download PDFInfo
- Publication number
- CN203865911U CN203865911U CN201420299794.1U CN201420299794U CN203865911U CN 203865911 U CN203865911 U CN 203865911U CN 201420299794 U CN201420299794 U CN 201420299794U CN 203865911 U CN203865911 U CN 203865911U
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- China
- Prior art keywords
- relay
- button
- tower crane
- power supply
- control circuit
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to the field of electrical control and particularly provides an electrical emergency control circuit of a tower crane. The electrical emergency control circuit comprises an electric rotating machine electromagnetic brake coil, a first relay, a second relay, an emergency power supply, a start button and a stop button. Two first normally-open contacts of the second relay are connected with the emergency power supply and the electric rotating machine electromagnetic brake coil, two ends of a second normally-open contact of the second relay are respectively connected with the start button and the stop button, and two ends of the coil are respectively connected with the start button and the emergency power supply. Two ends of one normally-closed contact of the first relay are respectively connected with the emergency power supply and the stop button. Since the electrical emergency control circuit of the tower crane is provided with the emergency power supply, power supply switching is achieved by means of a control button and the two relays in sudden interruption of power, the emergency power supply is started to supply power for the electrical rotating machine electromagnetic brake coil to realize braking of a boom rotation mechanism of the tower crane, and potential safety hazard caused by suspending in air of a lifting boom of the tower crane after power interruption is avoided.
Description
Technical field
The utility model relates to construction machinery and equipment electric-controlled technical field processed, in particular to the electric emergency control circuit of a kind of tower crane.
Background technology
Tower crane is the heavy mechanical equipment often using on building ground, is undertaking the vital task of vertical transport.Tower crane needs power supply to drive ability normal operation, yet tripping operation power failure is but the emergency case often running on building ground.
In current tower crane control technology, when if tower crane runs into unexpected power failure in the course of the work, the drg of the rotating mechanism of its large arm is by ineffective, uncontrollable its large arm rotation of tower crane chaufeur, the large arm of can only leaving rotates freely under effect of inertia, suddenly before having a power failure, handling hangs thing and also will be trapped in the air, now, if run into the weather that has wind, the large arm of tower crane will rotate freely along with wind direction, handling to hang thing also indefinite by swaying along with the rotation of large arm, there is very large potential safety hazard.
Utility model content
The purpose of this utility model is to provide a kind of tower crane electric emergency control circuit, to solve, above-mentionedly owing to having a power failure suddenly, causes the large arm of tower crane to rotate freely with inertia or wind-force and the unsettled problem that has potential safety hazard of thing of hanging of tower crane handling.
The electric emergency control circuit of tower crane that the utility model provides, the first relay that comprises rotating machine electromagnetic braking coil and connection external source, described the first relay is connected with rotating machine electromagnetic braking coil, also comprise the second relay, backup power and control button, described control button comprises start button and stop button, and described start button connects stop button;
The second relay pack vinculum circle and two the first open contacts and second open contact, wherein two the first open contacts are all connected with rotating machine electromagnetic braking coil with backup power, the two ends of the second open contact connect respectively start button and stop button, and the two ends of described coil connect respectively start button and backup power; The first relay comprises a normally closed contact, and the two ends of described normally closed contact connect respectively backup power and stop button.
Preferably, described control button also comprises inching button, and described inching button one end is connected with stop button, and the other end is connected with described the second open contact with the coil of described the second relay respectively.By the large arm rotating mechanism of tower crane after inching button is set realizes power-off, brake gradually, avoided repeatedly alternately clicking start button and stop button and braked gradually with the large arm rotating mechanism of tower crane after realizing power-off, easy to operate.
The technique effect that the utility model is realized: the tower crane electric control circuit that the utility model provides is provided with two relays, backup power and control buttons, after power-off, by control button and relay, realize electrical source exchange suddenly, starting backup power is the power supply of rotating machine electromagnetic braking coil, realize the large arm rotating mechanism braking of tower crane, to the thing that hangs of tower crane is dropped to safety place, avoid the large arm of tower crane to rotate with the wind, avoided the thing that hangs of tower crane handling after power-off to hang on the potential safety hazard that bring in high-altitude.
Accompanying drawing explanation
Fig. 1 is a kind of electrical schematic diagram of the electric emergency control circuit of tower crane of structure;
Fig. 2 is the electrical schematic diagram of the electric emergency control circuit of tower crane of another kind of structure.
The specific embodiment
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
Consult Fig. 1, the electric emergency control circuit of tower crane that the present embodiment provides comprises relay J 1, relay J 2, as direct current 24V storage battery, rotating machine electromagnetic braking coil and the control button of backup power, control button comprises start button SB1, inching button SB2 and stop button SB3, and stop button SB3 is connected with start button SB1, inching button SB2 respectively.The coil of relay J 1 is by terminal 3, terminal 4 connects tower crane rotating machine control loop electromagnetic braking coil power supply (being that the power supply of electric energy is provided for rotating machine electromagnetic braking coil in tower crane rotating machine control loop), the open contact J12 of relay J 1, open contact J14 is respectively by terminal 1, terminal 2 connects tower crane rotating machine control loop power supplys (for tower crane rotating machine control loop provides the power supply of electric energy), the open contact J12 of while relay J 1, open contact J14 is connected with rotating machine electromagnetic braking coil, the normally closed contact J11 of relay J 1 respectively with direct current 24V storage battery, stop button SB3 connects.The coil of relay J 2, open contact J22, open contact J24 are connected with direct current 24V storage battery respectively, open contact J22, the open contact J24 of relay J 2 are connected with rotating machine electromagnetic braking coil simultaneously, and the open contact J26 of relay J 1 is connected with inching button SB2, start button SB1 respectively.
Principle of work and the control flow of the tower crane electric control circuit that the present embodiment is provided carry out brief description.
1. under tower crane normal operation, the coil of relay J 1 obtains electric, and its open contact J12, open contact J14 connect, and tower crane rotating machine electromagnetic braking coil is working properly, tower crane normal operation; Now, the normally closed contact J11 of relay J 1 disconnects, and the coil losing electricity of relay J 2 can not be connected, and can effectively prevent relay J 2 error startings.
2. after burst has a power failure, the coil losing electricity of relay J 1, its open contact J12, open contact J14 disconnects, its normally closed contact J11 connects simultaneously, now, chaufeur can be by clicking inching button SB2, make the open contact J22 of relay J 2, open contact J24 connects direct current 24V storage battery along with the crawl of inching button SB2, tower crane rotating machine electromagnetic braking coil obtains electric, finger power-off gradually after inching button SB2 unclamps (due to the not power-off immediately of inverse electromotive force of relay J 2) when chaufeur, by so repeatedly clicking inching button SB2, reach the object that the large arm rotating mechanism of tower crane is braked gradually, avoid having a power failure the rear large arm rotating mechanism of tower crane because inertia does not stop rotation because of burst, also avoid the large arm of tower crane to rotate with the wind.
3. after the large arm of tower crane stops, click start button SB1, make the coil of relay J 2 obtain electric, its open contact J22, open contact J24 connect, tower crane rotating machine electromagnetic braking coil obtains electric, the clicked rear lasting maintenance connected state of start button SB1, makes tower crane rotating machine electromagnetic braking coil continue electricly, thereby reaches the object of the large arm rotating mechanism braking of tower crane.As need releasing brake, click stop button SB3.
In the electrical schematic diagram of the electric emergency control circuit of tower crane shown in Fig. 1, be that after realizing power-off by inching button SB2, the large arm rotating mechanism of tower crane is braked gradually, certain also can realize by start button SB1 and stop button SB3.Consult Fig. 2, control button only comprises start button SB1 and stop button SB3, and one end of start button SB1 is connected with stop button SB3, and the other end of start button SB1 connects respectively coil and the open contact J26 of relay J 2.The normally closed contact J11 of relay J 1 connects respectively one end of direct current 24V storage battery and stop button SB3, and the other end of stop button SB3 connects the other end of the open contact J26 of relay J 2.In the electrical schematic diagram of the tower crane electric control circuit shown in Fig. 2, be to brake gradually by the large arm rotating mechanism of tower crane after alternately clicking start button SB1 and stop button SB3 and realizing power-off, with respect to only clicking inching button SB2, operation is inconvenience comparatively.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (2)
1. the electric emergency control circuit of tower crane, the first relay that comprises rotating machine electromagnetic braking coil and connection external source, described the first relay is connected with rotating machine electromagnetic braking coil, it is characterized in that, also comprise the second relay, backup power and control button, described control button comprises start button and stop button, and described start button connects stop button;
The second relay pack vinculum circle and two the first open contacts and second open contact, wherein two the first open contacts are all connected with rotating machine electromagnetic braking coil with backup power, the two ends of the second open contact connect respectively start button and stop button, and the two ends of described coil connect respectively start button and backup power; The first relay comprises a normally closed contact, and the two ends of described normally closed contact connect respectively backup power and stop button.
2. the electric emergency control circuit of tower crane according to claim 1, it is characterized in that, described control button also comprises inching button, and described inching button one end is connected with stop button, and the other end is connected with described the second open contact with the coil of described the second relay respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420299794.1U CN203865911U (en) | 2014-06-06 | 2014-06-06 | Electrical emergency control circuit of tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420299794.1U CN203865911U (en) | 2014-06-06 | 2014-06-06 | Electrical emergency control circuit of tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203865911U true CN203865911U (en) | 2014-10-08 |
Family
ID=51646890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420299794.1U Expired - Fee Related CN203865911U (en) | 2014-06-06 | 2014-06-06 | Electrical emergency control circuit of tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203865911U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991805A (en) * | 2014-06-06 | 2014-08-20 | 南通市达欣工程股份有限公司 | Electrical emergency control circuit for tower crane |
| CN104528559A (en) * | 2015-01-05 | 2015-04-22 | 深圳市英威腾电气股份有限公司 | Tower crane system and tower crane rotation vortex flow controller |
| CN104555764A (en) * | 2015-01-05 | 2015-04-29 | 深圳市英威腾电气股份有限公司 | Rotary braking system and tower crane control system |
-
2014
- 2014-06-06 CN CN201420299794.1U patent/CN203865911U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991805A (en) * | 2014-06-06 | 2014-08-20 | 南通市达欣工程股份有限公司 | Electrical emergency control circuit for tower crane |
| CN104528559A (en) * | 2015-01-05 | 2015-04-22 | 深圳市英威腾电气股份有限公司 | Tower crane system and tower crane rotation vortex flow controller |
| CN104555764A (en) * | 2015-01-05 | 2015-04-29 | 深圳市英威腾电气股份有限公司 | Rotary braking system and tower crane control system |
| CN104528559B (en) * | 2015-01-05 | 2017-04-26 | 深圳市英威腾电气股份有限公司 | Tower crane system and tower crane rotation vortex flow controller |
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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: 20141008 Termination date: 20170606 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |