CN216807903U - Rotary braking power-off protection device of tower crane - Google Patents
Rotary braking power-off protection device of tower crane Download PDFInfo
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- CN216807903U CN216807903U CN202123093075.3U CN202123093075U CN216807903U CN 216807903 U CN216807903 U CN 216807903U CN 202123093075 U CN202123093075 U CN 202123093075U CN 216807903 U CN216807903 U CN 216807903U
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Abstract
The utility model discloses a rotary braking power-off protection device of a tower crane, which comprises: the system comprises an emergency power supply, an air switch, a rotary brake coil, a rotary brake control loop, a brake coil release loop, an indicator light, a diode and a power loss detection loop, wherein the power loss detection loop is connected to a main power supply of the tower crane and is used for detecting the power loss condition of the main power supply; the rotary brake control loop is connected to the rotary brake coil; the brake button is arranged on the cab operation panel; when the tower crane is accidentally powered off in the hoisting process, the power-off delay relay power-off normally-closed contact is disconnected, a driver presses a brake button, the relay is powered on, a rotary brake control loop is closed, a rotary brake coil circuit is connected with an emergency power supply and powered on, and the brake is kept to normally work.
Description
Technical Field
The utility model relates to the technical field of towers, in particular to a rotary braking power-off protection device for a tower crane.
Background
The tower crane is widely applied to construction engineering, and the safety performance requirement of the tower crane is higher and higher along with the continuous increase of the using density of the tower crane.
According to the relevant specification requirements: the rotary part of the tower crane can freely rotate in the non-working state, so that the wind load in the non-working state is reduced. Therefore, the rotary brake of the tower crane is generally designed into a normally open type direct current disc brake, and the tower crane can rotate freely after power failure.
In the normal work of the tower crane, if the tower crane is suddenly powered off due to an accident, the rotary brake is opened due to the power failure and is out of control. Under the action of inertia and wind load, the large arm, the lifting hook and the weight on the lifting hook of the tower crane can rotate freely and lose control. In this case, the construction site is often in a narrow and complicated state and often collides with obstacles or constructors, thereby causing safety accidents. Therefore, the rotary braking power-off protection device for the tower crane is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a rotary braking power-off protection device of a tower crane, which aims to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: a tower crane gyration braking power loss protection device includes:
the method comprises the following steps: the emergency braking system comprises an emergency power supply, an air switch, a first contact, a second contact, a rotary braking coil, a rotary braking control loop, a braking coil release loop, an indicator light, a first diode and a power loss detection loop.
The rotary brake control loop is connected with the rotary brake coil in parallel;
the brake coil release loop is connected with the rotary brake coil in parallel;
the air switch, the first contact, the second contact, the indicator lamp and the first diode are connected in series between the emergency power supply and the rotary brake coil circuit, and the anode and the cathode of the diode are respectively connected with the anode and the cathode of the emergency power supply.
As further preferable in the present technical solution: the rotary brake control circuit comprises a brake button, a contact III and a relay I which are arranged in series, wherein the contact III and the brake button are arranged in parallel.
As further preferable in the present technical solution: the brake coil release loop comprises a resistor and a diode which are connected in series, the anode of the diode is connected with the output end of the rotary brake coil, and the cathode of the diode is connected with the input end of the rotary brake coil.
As a further preferred aspect of the present invention: the second contact and the third contact are normally open contacts of the first relay.
As a further preferred aspect of the present invention: the power loss detection circuit comprises a second relay and is connected to a main power supply of the tower crane.
As further preferable in the present technical solution: and the contact is a normally closed contact of the second relay.
Compared with the prior art, the utility model has the beneficial effects that: when the tower crane loses power suddenly, the second relay is released due to power loss, the first contact is closed, a driver presses the brake button, the second relay is electrified to be attracted, the second contact and the third contact are closed, the emergency power supply is connected with the brake coil, and the rotary brake works, so that the problem that the tower crane is out of control in rotation when power loss happens suddenly is solved.
Drawings
FIG. 1 is a circuit diagram of the apparatus of the present invention;
in the figure: 1. an emergency power supply; 2. an air switch; 3. a first contact; 4. a brake control circuit; 5. a second contact; 6. a brake button; 7. a contact point III; 8. a brake coil release circuit; 9. a resistance; 10. a brake coil; 11. a second diode; 12. an indicator light; 13. a first relay; 14. a second relay; 15. a first diode; 16. and a power loss detection loop.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, the present invention provides a technical solution: a tower crane gyration braking power loss protection device includes:
the emergency braking system comprises an emergency power supply 1, an air switch 2, a first contact 3, a second contact 5, a rotary braking coil 10, a rotary braking control circuit 4, a braking coil release circuit 8, an indicator lamp 12, a first diode 15 and a power loss detection circuit 16.
The rotary brake control circuit 4 comprises a brake button 6, a contact point three 7 and a relay one 13;
a brake coil release circuit 8, the brake coil release circuit 8 comprising a resistor 9 and a diode 11;
in this embodiment, specifically: the rotary brake control circuit 4 is provided with a brake button 6, a contact III 7 and a relay I13 in series, and the contact III is connected with the brake button in parallel; through the arrangement, the brake button 6 is pressed, the relay I13 is electrified and attracted, the contact III 7 is closed, and the loop still keeps a closed state when the brake button 6 is released.
In this embodiment, specifically: the brake coil release loop 8 is provided with a resistor 9 and a diode II 11 in series, the anode of the diode II 11 is connected with the output end of the rotary brake coil 10, and the cathode of the diode is connected with the input end of the rotary brake coil 10; through the arrangement, the induced current generated by the rotary brake coil 10 can be released through the brake coil release circuit 8, so that the coil and an emergency power supply are protected.
In this embodiment, specifically: the power loss detection loop 16 is connected to a main power supply of the tower crane, and the first contact 3 is arranged in the loop of the emergency power supply and the brake coil in series; through the arrangement, the first contact 3 is closed when the tower crane main power failure occurs, and the rotary braking power failure protection device of the tower crane can be started.
In this embodiment, specifically: the air switch 2 is arranged in the circuit and plays a role in protecting the circuit from overcurrent and short circuit.
In this embodiment, specifically: the emergency power supply 1 is a rechargeable direct-current storage battery and is manually charged by a special charger.
In this embodiment, specifically: the air switch 2 is a quick breaker with overcurrent and short-circuit protection functions.
According to the working principle or the structural principle, when the main power supply of the tower crane is powered off, the relay II 14 is powered off and released in a delayed mode, the contact I3 is closed, then a driver presses the brake button 6, the relay I13 is electrified and closed, the contact II 5 and the contact III 7 are closed, so that the emergency power supply 1 is connected with the rotary brake coil 10, the emergency power supply 1 continuously supplies power to the rotary brake coil 10, the indicator lamp 12 is normally on, and the rotary brake keeps a braking state; when the tower crane recovers to supply power normally, the relay II 14 is electrified and is immediately closed, the contact II 3 is disconnected, the emergency power supply 1 is disconnected with the rotary brake coil 10, the rotary brake coil 10 is normally supplied with power by the tower crane power supply, and the safe conversion of the power failure of the rotary brake and the power supply in the normal working state is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a tower crane gyration braking power loss protection device which characterized in that includes: the emergency braking system comprises an emergency power supply (1), an air switch (2), a first contact (3), a second contact (5), a rotary braking coil (10), a rotary braking control circuit (4), a braking coil release circuit (8), an indicator lamp (12), a first diode (15) and a power loss detection circuit (16);
the rotary brake control circuit (4) is connected with the rotary brake coil (10) in parallel;
the brake coil release loop (8) is connected with the rotary brake coil (10) in parallel;
the emergency braking device is characterized in that the air switch (2), the contact I (3), the contact II (5), the indicator lamp (12) and the diode I (15) are arranged between the emergency power supply (1) and the circuit of the rotary braking coil (10) in series, and the anode and the cathode of the diode I (15) are respectively connected with the anode and the cathode of the emergency power supply (1).
2. The rotary braking power-loss protection device of the tower crane according to claim 1, characterized in that: the rotary braking control circuit (4) comprises a braking button (6), a contact III (7) and a relay I (13) which are arranged in series, wherein the contact III (7) and the braking button (6) are arranged in parallel.
3. The rotary braking power-loss protection device of the tower crane according to claim 1, characterized in that: the brake coil release loop (8) comprises a resistor (9) and a diode II (11) which are connected in series, the anode of the diode II (11) is connected with the output end of the rotary brake coil (10), and the cathode of the diode II (11) is connected with the input end of the rotary brake coil (10).
4. The rotary braking power-loss protection device of the tower crane according to any one of claims 1 to 3, wherein: the second contact (5) and the third contact (7) are normally open contacts of the first relay (13).
5. The rotary braking power-loss protection device of the tower crane according to claim 1, characterized in that: the power loss detection circuit (16) comprises a second relay (14), and the power loss detection circuit (16) is connected to a main power supply of the tower crane.
6. The rotary braking power-loss protection device of the tower crane according to claim 1, characterized in that: the first contact (3) is a normally closed contact of the second relay (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123093075.3U CN216807903U (en) | 2021-12-10 | 2021-12-10 | Rotary braking power-off protection device of tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123093075.3U CN216807903U (en) | 2021-12-10 | 2021-12-10 | Rotary braking power-off protection device of tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216807903U true CN216807903U (en) | 2022-06-24 |
Family
ID=82052658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123093075.3U Active CN216807903U (en) | 2021-12-10 | 2021-12-10 | Rotary braking power-off protection device of tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216807903U (en) |
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2021
- 2021-12-10 CN CN202123093075.3U patent/CN216807903U/en active Active
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