Emergency power supply alarm control circuit for crane

Abstract

The utility model discloses a crane emergency power supply alarm control circuit which comprises a power supply circuit and a UPS power supply, the UPS power supply is connected in series in the power supply circuit, the power supply circuit is further connected in series with a relay, the relay is located at the power supply front end of the UPS power supply, and the power supply rear end of the UPS power supply is connected in series with an alarm control loop. And the alarm control loop is connected in series with a normally closed contact of the relay and an alarm. Whether the crane is suddenly powered off or not is judged by judging whether the front end of the UPS has power input or not, when the front end of the UPS has no power input, the UPS starts emergency power supply and sends out an alarm signal to remind field personnel that the UPS is put into use at the moment, the crane possibly breaks down and is powered off, the field personnel are effectively reminded, and the safety of the crane is ensured. The safety of the hoisting operation is improved, and the potential safety hazard of the hoisting operation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crane control, in particular to an emergency power supply alarm control circuit for a crane. Background Art

[0002] In order to prevent accidents caused by sudden power outages on cranes and affect normal operation, UPS is used to provide uninterrupted power supply to some important equipment of the crane. For example, cranes with electromagnetic systems need uninterrupted power supply to remote controllers or lighting, smoke alarms, intercoms and other equipment. UPS is in charging state when the overhead crane is powered on and is not put into use. It is put into use when emergency power supply is needed. However, the UPS power supply must consider the UPS power size and power supply duration. There are many interference factors on site and the UPS power supply time cannot be guaranteed, which poses a great safety hazard to on-site personnel and equipment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a crane emergency power supply alarm control circuit. By judging whether there is power input at the front end of a UPS power supply, it is judged whether the crane suddenly loses power. When there is no power input at the front end of the UPS power supply, it indicates that the UPS power supply starts emergency power supply and sends out an alarm signal, reminding on-site personnel that the UPS is in use at this time and the crane may have a fault and has lost power. This effectively reminds on-site personnel, improves the safety of lifting operations, reduces the potential safety hazards of lifting operations, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crane emergency power supply alarm control circuit, comprising a power supply circuit and a UPS power supply, wherein the UPS power supply is connected in series in the power supply circuit, and the power supply circuit is also connected in series with a relay, the relay is located at the front end of the UPS power supply, and the rear end of the UPS power supply is connected in series with an alarm control circuit, and the alarm control circuit is connected in series with the normally closed contacts of the relay and an alarm.

[0005] Preferably, the UPS power supply is arranged in the driver's cab.

[0006] Preferably, the alarm is arranged in the driver's cab or at the bridge railing.

[0007] Compared with the prior art, the beneficial effects of the utility model are as follows: a relay is added at the front end of a UPS power supply, and the relay is used to determine whether the UPS power supply has power input; an alarm is controlled by the normally closed contact of the relay at the rear end of the UPS power supply; when the crane is working normally, the relay is energized and the normally closed contact is disconnected; when the crane fails and the power is cut off, the relay loses power, the normally closed contact is closed, and the alarm sends out an alarm signal; it automatically determines that the crane is suddenly powered off due to an accident and uses the UPS power supply for power supply while sending out an emergency power supply alarm signal, which effectively reminds on-site personnel, improves the safety of lifting operations, and reduces safety hazards of lifting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a circuit diagram of the utility model.

[0009] In the figure: 1 power supply circuit, 2 relay, 3 UPS power supply, 4 alarm control circuit, 5 alarm. DETAILED DESCRIPTION

[0010] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0011] See also Figure 1 The utility model provides a technical solution: a crane emergency power supply alarm control circuit, including a power supply circuit 1 and a UPS power supply 3, the UPS power supply 3 is connected in series in the power supply circuit 1, the power supply circuit 1 is also connected in series with a relay 2, the relay 2 is located at the front end of the UPS power supply 3, the rear end of the UPS power supply 3 is connected in series with an alarm control circuit 4, and the alarm control circuit 4 is connected in series with a normally closed contact of the relay 2 and an alarm 5;

[0012] It can be understood that a relay 2 is added to the front end of the UPS power supply 3, and the relay 2 determines whether the UPS power supply 3 has power input. At the rear end of the UPS power supply 3, an alarm 5 is controlled by the normally closed contact of the relay 2. When the crane is working normally, the relay 2 is energized, the normally closed contact is disconnected, and the alarm 5 does not work; when the crane fails and the power is cut off, the relay 2 loses power, the normally closed contact is closed, and the alarm 5 sends an alarm signal. At this time, the UPS power supply 3 starts emergency power supply and sends an alarm signal to remind the on-site personnel that the UPS is in use at this time and the crane may have a fault and the power is cut off; it can automatically determine that the crane is suddenly powered off due to an accident and uses the UPS power supply to supply power while sending an emergency power supply alarm signal;

[0013] In addition, the UPS power supply 3 is arranged in the driver's cab; the alarm 5 is arranged in the driver's cab or at the bridge railing, and is installed at a position close to the staff, which can effectively remind the on-site staff.

[0014] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended to include all changes that fall within the meaning and scope of equivalent elements in the content of the present invention.

Claims

1. A crane emergency power supply alarm control circuit, comprising a power supply circuit (1) and a UPS power supply (3), characterized in that: The UPS power supply (3) is connected in series in the power supply circuit (1), the power supply circuit (1) is also connected in series with a relay (2), the relay (2) is located at the front end of the power supply of the UPS power supply (3), the back end of the power supply of the UPS power supply (3) is connected in series with an alarm control circuit (4), and the alarm control circuit (4) is connected in series with a normally closed contact of the relay (2) and an alarm (5).

2. A crane emergency power supply alarm control circuit according to claim 1, characterized in that: The UPS power supply (3) is arranged in the driver's cab.

3. The crane emergency power supply alarm control circuit according to claim 1 is characterized in that: The alarm (5) is arranged in the driver's cab or on the bridge railing.

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