Brake backup power supply control box

Abstract

The utility model belongs to the technical field of brake manufacturing, and particularly relates to a brake back-up power source control box which comprises a transformer cabinet, a storage battery cabinet and a control conversion box, the control conversion box is electrically connected with the transformer cabinet and the storage battery cabinet respectively, the input end of the transformer cabinet is connected with a 380V power source, and when the 380V power source supplies power normally, the storage battery cabinet is connected with the storage battery cabinet. The transformer cabinet supplies power to the control conversion box to control the brake motor to work when the 380V power supply is powered off, and the storage battery cabinet supplies power to the control conversion box to control the brake motor to work when the 380V power supply is powered off. Unlike an inverter in a traditional mode, the inverter provided by the utility model needs an inversion booster circuit, has the characteristics of simple structure and low price, and also solves the problem of safe lowering of a heavy object hoisted by a crane when a brake is controllably opened under a power-off working condition.

Description

Technical Field

[0001] The utility model belongs to the technical field of brake manufacturing, and specifically relates to a control box for the backup power supply of a brake. Background Technique

[0002] A brake is a device with functions such as decelerating, stopping, or maintaining a stopped state of a moving part (or moving machinery). It is a mechanical part that stops or decelerates the moving parts in a machine, commonly known as a brake or a brake. It mainly consists of a brake frame, a braking part, a control device, etc.

[0003] The existing electric brake controls the closing or opening of the brake through a brake motor. When the control box of the electric brake is connected to a backup DC power supply, the traditional inverter needs to set up an inverter boost circuit, which has a complex structure and a high manufacturing cost. Moreover, in the non-electric working condition, it is not convenient to open the brake to safely lower the heavy object lifted by the crane.

[0004] Therefore, it is urgently needed to be improved. Content of the Utility Model

[0005] The purpose of the utility model is to solve the above technical problems and propose a control box for the backup power supply of a brake.

[0006] Its technical solution is: a control box for the backup power supply of a brake, including a transformer cabinet, a battery cabinet, and a control conversion box. The control conversion box is electrically connected to the transformer cabinet and the battery cabinet respectively. The input end of the transformer cabinet is connected to a 380V power supply. When the 380V power supply is normally powered, the transformer cabinet supplies power to the control conversion box to control the operation of the brake motor. When the 380V power supply is powered off, the battery cabinet supplies power to the control conversion box to control the operation of the brake motor.

[0007] Preferably, a circuit breaker QF1, a circuit breaker QF2, an AC contactor KM1, a DC contactor KM2, a DC contactor KM3, a time relay KJ1, an intermediate relay KA1, and a DC inverter AC module are provided in the control conversion box. The output end of the transformer cabinet is electrically connected to the input end of the AC contactor KM1 through the circuit breaker QF1. The output end of the AC contactor is electrically connected to the brake motor through a thermal protector. The thermal protector is electrically connected to the AC connection end of the DC inverter AC module through the DC contactor KM2. The DC connection end of the DC inverter AC module is electrically connected to the battery cabinet through the DC contactor KM3.

[0008] Preferably, the coils of the AC contactor KM1 and the DC contactor KM2 are interlocked through the thermal protector contacts to prevent the transformer cabinet and the battery cabinet from supplying power simultaneously.

[0009] Preferably, it further includes an AC remote control switch, an indicator light 1, and an indicator light 2. The AC remote control switch is connected in series with the coils of the DC contactor KM2 and the AC contactor KM1 to form a first series circuit. The AC contactor KM1 is connected in series with the indicator light 1 to form a second series circuit. The first series circuit is respectively connected in parallel with the second series circuit and the indicator light 2.

[0010] Preferably, this application further includes a DC remote control switch, an inverter control switch, and an indicator light 3. The coil of the DC contactor KM2 is connected in series with the AC contactor KM1, and the coils of the time relay KJ1 and the intermediate relay KA1 are both connected in parallel with the coil of the DC contactor KM2 to form a first parallel circuit. The DC remote control switch is connected in series with the first parallel circuit. The coil of the intermediate relay KA1 is connected in parallel with the indicator light 3 to form a second parallel circuit. The inverter control switch is connected in series with the second parallel circuit through the time relay.

[0011] This utility model further includes other components that can enable a brake backup power supply control box to work properly, which are all conventional means in the art. In addition, devices or components not defined in this utility model, such as a transformer cabinet, a battery cabinet, a circuit breaker, a contactor, a relay, a DC to AC inverter module, an AC remote control switch, a DC remote control switch, and an inverter control switch, etc., all adopt the existing technologies in the art. Those skilled in the art can select the specifications and models of the corresponding devices or components according to actual needs.

[0012] The working principle of this utility model is that when the device works normally, the 380V power supply is connected to the transformer cabinet to supply power to the control conversion box to control the operation of the brake motor. When the 380V power supply is cut off, the battery cabinet supplies power to the control conversion box to control the operation of the brake motor. The control conversion box receives the three-phase AC 220V power output after voltage transformation by the transformer cabinet, closes the circuit breaker QF1 and the AC remote control switch, and the coil of the AC contactor KM1 is energized, then the main contacts of the AC contactor KM1 are closed, and the brake motor works to open the brake. Disconnecting the AC remote control switch will close the brake. At the same time, the AC power supply charges the battery through the charger.

[0013] When the 380V power supply is cut off, the battery cabinet outputs 217V DC power to supply power to the control conversion box. Close the circuit breaker QF2 and the DC remote control switch, then the coils of the DC contactor KM2 and the DC contactor KM3 are energized, enabling the DC to AC inverter module to be powered on, and at the same time connecting the DC to AC inverter module to the brake motor. Close the inverter control switch, then the DC to AC inverter module works to output three-phase 220V AC power to make the brake motor work and the brake open. Disconnecting the inverter control switch will close the brake.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: unlike the inverter in the traditional mode, it does not require an inverter boost circuit, has the characteristics of simple structure and low price, and at the same time solves the problem of the safe lowering of the heavy object hoisted by the crane when the brake is controllably opened under the no-power condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the circuit connection diagram of the utility model in the embodiment.

[0016] Figure 2 It is the external structural schematic diagram of the transformer cabinet.

[0017] Figure 3 It is the external structural schematic diagram of the battery cabinet.

[0018] Figure 4 It is the internal structural schematic diagram of the control conversion box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further details the technology of the utility model in conjunction with the drawings and specific embodiments.

[0020] Embodiment:

[0021] As Figures 1 to 4 shown, this embodiment proposes a brake backup power supply control box, which includes a transformer cabinet 1, a battery cabinet 2 and a control conversion box 3. The control conversion box is electrically connected to the transformer cabinet and the battery cabinet respectively. The input end of the transformer cabinet is connected with a 380V power supply. When the 380V power supply is normally powered, the transformer cabinet supplies power to the control conversion box to control the operation of the brake motor 4. When the 380V power supply is powered off, the battery cabinet supplies power to the control conversion box to control the operation of the brake motor.

[0022] Specifically, a circuit breaker QF1, a circuit breaker QF2, an AC contactor KM1, a DC contactor KM2, a DC contactor KM3, a time relay KJ1, an intermediate relay KA1 and a DC inverter AC module 5 are arranged in the control conversion box. The output end of the transformer cabinet is electrically connected to the input end of the AC contactor KM1 through the circuit breaker QF1. The output end of the AC contactor is electrically connected to the brake motor through a thermal protector. The thermal protector is electrically connected to the AC power connection end of the DC inverter AC module through the DC contactor KM2. The DC power connection end of the DC inverter AC module is electrically connected to the battery cabinet through the DC contactor KM3.

[0023] To prevent the transformer cabinet and the battery cabinet from supplying power simultaneously, in this embodiment, the coils of the AC contactor KM1 and the DC contactor KM2 are interlocked through the thermal protector interlock contacts.

[0024] In this embodiment, it further includes an AC remote control switch 6, a DC remote control switch 7, an inverter control switch 8, an indicator light 9, an indicator light 10, and an indicator light 11. The AC remote control switch is connected in series with the coils of the DC contactor KM2 and the AC contactor KM1 to form a first series circuit. The AC contactor KM1 is connected in series with the indicator light 9 to form a second series circuit. The first series circuit is respectively connected in parallel with the second series circuit and the indicator light 10. The coil of the DC contactor KM2 is connected in series with the AC contactor KM1, and the coils of the time relay KJ1 and the intermediate relay KA1 are both connected in parallel with the coil of the DC contactor KM2 to form a first parallel circuit. The DC remote control switch is connected in series with the first parallel circuit. The coil of the intermediate relay KA1 is connected in parallel with the indicator light 11 to form a second parallel circuit. The inverter control switch is connected in series with the second parallel circuit through the time relay.

[0025] The working principle of the present utility model is that when the device is working normally, the 380V power supply is connected to the transformer cabinet to supply power to the control conversion box to control the operation of the brake motor. When the 380V power supply is cut off, the battery cabinet supplies power to the control conversion box to control the operation of the brake motor. The control conversion box receives the three-phase AC 220V power supply output after voltage transformation by the transformer cabinet, closes the circuit breaker QF1 and the AC remote control switch, and the coil of the AC contactor KM1 is energized, then the main contacts of the AC contactor KM1 are closed, and the brake motor operates to open the brake. Disconnecting the AC remote control switch closes the brake. At the same time, the AC power supply charges the battery through the charger.

[0026] When the 380V power supply is cut off, the battery cabinet outputs 217V DC power supply to the control conversion box. Closing the circuit breaker QF2 and the DC remote control switch, the coils of the DC contactor KM2 and the DC contactor KM3 are energized, enabling the DC inverter AC module to be powered on. At the same time, the DC inverter AC module is connected to the brake motor. Closing the inverter control switch, the DC inverter AC module operates to output three-phase 220V AC power supply to make the brake motor operate and the brake open. Disconnecting the inverter control switch closes the brake.

[0027] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A brake backup power supply control box, including a transformer cabinet, characterized in that: It also includes a battery cabinet and a control conversion box, the control conversion box is electrically connected to the transformer cabinet and the battery cabinet respectively, the input end of the transformer cabinet is connected to a 380V power supply, and when the 380V power supply is normally powered, the transformer cabinet supplies power to the control conversion box to control the brake motor to work, and when the 380V power supply is off, the battery cabinet supplies power to the control conversion box to control the brake motor to work; The control conversion box is provided with a circuit breaker QF1, a circuit breaker QF2, an AC contactor KM1, a DC contactor KM2, a DC contactor KM3, a time relay KJ1, an intermediate relay KA1 and a DC inverter AC module. The output end of the transformer cabinet is electrically connected to the input end of the AC contactor KM1 through the circuit breaker QF1, the output end of the AC contactor is electrically connected to the brake motor through a thermal protector, the thermal protector is electrically connected to the AC connection end of the DC inverter AC module through the DC contactor KM2, and the DC connection end of the DC inverter AC module is electrically connected to the battery cabinet through the DC contactor KM3.

2. A brake backup power supply control box according to claim 1, characterized in that: The coil of the AC contactor KM1 and the coil of the DC contactor KM2 are interlocked through thermal protector contacts.

3. A brake backup power supply control box according to claim 2, characterized in that: It also includes an AC remote control switch, an indicator light 1 and an indicator light 2. The AC remote control switch is connected in series with the coils of the DC contactor KM2 and the AC contactor KM1 to form a series circuit 1. The AC contactor KM1 is connected in series with the indicator light 1 to form a series circuit 2. The series circuit 1 is connected in parallel with the series circuit 2 and the indicator light 2 respectively.

4. A brake backup power supply control box according to claim 3, characterized in that: It also includes a DC remote control switch, an inverter control switch and an indicator light three. The coil of the DC contactor KM2 is connected in series with the AC contactor KM1, and the coil of the time relay KJ1 and the coil of the intermediate relay KA1 are connected in parallel with the coil of the DC contactor KM2 to form a parallel circuit one. The DC remote control switch is connected in series with the parallel circuit one, the coil of the intermediate relay KA1 is connected in parallel with the indicator light three to form a parallel circuit two, and the inverter control switch is connected in series with the parallel circuit two through the time relay.

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