Safety brake control device

Abstract

The utility model relates to a safety brake control device in the technical field of brake manufacturing, which comprises a control box, a transformer BK1, a time relay KT1, a relay KA1, a circuit breaker QF1, a contactor KM1, a wiring terminal strip and a control box are arranged in the control box, a rectifying circuit B1, a rectifying circuit B2 and a rectifying circuit B3 are arranged in the control box, 380V mains supply is divided into two paths of 380V power supplies through the circuit breaker Q1F, and the two paths of 380V power supplies are connected with the relay KA1. One 380V power supply is connected to a transformer BK1 and then outputs two 20V alternating current power supplies, one 20V alternating current power supply is connected to a rectifying circuit B3, the other 380V power supply is connected to a rectifying circuit B1 through a contactor KM1 and then outputs a 340V alternating current power supply for high-voltage attraction of an electromagnet DT, and the other 20V alternating current power supply is connected to a rectifying circuit B2 to store electric energy and provide a 28V direct current power supply for the electromagnet DT. The device is simple in structure, low in energy consumption and beneficial to improving the safety of the brake.

Description

Technical Field

[0001] The utility model belongs to the technical field of brake manufacturing, and in particular relates to a safety brake control device. Background Art

[0002] The electromagnetic power-off brake is composed of iron core, spring, armature, friction plate, brake disc, transmission connection device and other components, and is mainly used for braking various motors. After power is applied, the iron core of the electromagnetic power-off brake generates a magnetic field in the winding, which sucks the armature back. At this time, the armature compresses the spring fixed in the iron core, and the motor shaft connected to the brake disc through the connection device is in a state of free rotation; when the iron core loses power, the magnetic field of the iron core disappears and loses the suction force on the armature, the spring ejects the armature, the armature and the brake disc are pressed against each other, and the friction plate generates a braking torque on the brake disc to limit the rotation of the brake disc, thereby playing a braking role on the motor shaft connected to the brake disc, preventing the rotation of the motor rotor.

[0003] The existing electromagnetic power-off brake has a complex control device structure, high energy consumption and the safety of the brake needs to be improved during use. Therefore, the inventor proposes a safety brake control device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and to provide a safety brake control device.

[0005] The technical scheme is as follows: a safety brake control device, comprising a control box, an electromagnet DT is provided on the safety brake, a transformer BK1, a time relay KT1, a relay KA1, a circuit breaker QF1, a contactor KM1, a terminal block and a control box are provided in the control box, a rectifier circuit B1, a rectifier circuit B2 and a rectifier circuit B3 are provided in the control box, the power supply terminal on the terminal block is electrically connected to an external 380V mains, the 380V mains is divided into two 380V power supplies through the circuit breaker Q1F, one 380V power supply is connected to the transformer BK1 and then output as two 20V AC power supplies, one 20V AC power supply is connected to the rectifier circuit B3, the coils of the time relay KT1 and the contactor KM1 are electrically connected in the rectifier circuit B3, and the rectifier circuit B3 is used for 380V mains. When the 0V power supply is de-energized, the time relay KT1 is energized to close the normally open contact of the time relay KT1, and the coil of the contactor KM1 is energized to close the normally open contact of the contactor KM1; another 380V power supply is connected to the rectifier circuit B1 through the contactor KM1 to output a 340V AC power supply, the electromagnet DT is electrically connected to the electromagnet terminal on the terminal block, the output end of the 340V AC power supply is connected to the electromagnet DT power supply magnet DT through the relay KA1 and the electromagnet terminal to attract the high voltage, and another 20V AC power supply is connected to the rectifier circuit B2 to store electric energy, and the output end of the rectifier circuit B2 is connected to the output end of the 340V AC power supply through the series-connected diodes D1 and D2, providing a 28V DC power supply for the electromagnet DT, so that the electromagnet DT is in a maintained state.

[0006] Preferably, the rectifier circuit B1 includes a rectifier bridge B1 and a resistor R1 and a diode D3 connected in parallel in an output loop of the rectifier bridge B1.

[0007] Preferably, the rectifier circuit B2 includes a rectifier bridge B2 and capacitors C3, C4, C5, C6 and a resistor R2 connected in parallel in an output loop of the rectifier bridge B2, wherein C3, C4, C5 and C6 are used to store electrical energy.

[0008] Preferably, the rectifier circuit B3 includes a rectifier bridge B3 and capacitors C1, C2, C7, a coil of a time relay KT1, and a contactor KM1 control circuit connected in parallel in the output circuit of the rectifier bridge B3, and the contactor KM1 control circuit includes the coil of the contactor KM1 and the normally open contact of the time relay KT1 connected in series.

[0009] Preferably, a diode D4 is connected in series between the capacitor C2 and the capacitor C7 and the rectifier bridge B3.

[0010] Preferably, the output end of the rectifier circuit B3 is connected to the emergency brake switch terminal on the terminal block via the coil of the relay KA1, and the emergency brake switch terminal is electrically connected to the emergency brake switch outside the control box.

[0011] Preferably, a diode D10 is connected in parallel to the coil of the relay KA1.

[0012] Preferably, the safety brake is provided with a travel switch, which is connected to a travel switch terminal on a terminal block and electrically connected to an output end of a 340V AC power supply.

[0013] The utility model also includes other components that enable a safety brake control device to be used normally, all of which are conventional means in the field. In addition, devices or components not limited in the utility model, such as rectifier bridges, diodes, capacitors, circuit breakers, relays, time relays, transformers, terminal blocks, etc., all adopt the existing technologies in the field. Those skilled in the art can select the specifications and models of the corresponding devices or components according to actual needs.

[0014] The working principle of the utility model is as follows:

[0015] Safety brake opening operation: After the circuit breaker QF1 is closed, the power is turned on at the moment. One 380V power supply is transformed by the transformer BK1 and outputs two 20V AC power supplies. One 20V AC power supply is rectified by the rectifier circuit B2 and stores the electric energy in the capacitor. The other 20V AC power supply is rectified by the rectifier circuit B3 to energize the time relay KT1. The normally open contact of the time relay KT1 is closed to energize the contactor KM1 coil. The normally open contact of the contactor KM1 is closed. When the 380V power supply is rectified by the rectifier circuit B1 and outputs 340V high voltage, the electromagnet DT is attracted. After 0.2 seconds, the timing time of the time relay KT1 is reached, and its normally open contact is disconnected. The contactor KM1 is also disconnected at the same time. At this time, the power rectified by the rectifier circuit B2 provides 28V DC power to the electromagnet through the diode D1 and the diode D2 in turn, and the electromagnet is in a maintained state.

[0016] Normal braking of the safety brake: cut off the 380V power supply, the DC power stored in the rectifier circuit B2 supplies power to the electromagnet DT to keep it in a maintained state. After discharging for 2 seconds, the voltage stored in the rectifier circuit B2 is lower than the maintenance voltage of the electromagnet DT, the electromagnet DT is released, and the safety brake achieves normal braking.

[0017] Safety brake emergency braking: The emergency brake switch terminals on the input terminal block are connected through the emergency brake switch outside the control box, so that the relay KA1 is energized, the normally closed contact of the relay KA1 is disconnected, the electromagnet DT loses power instantly and is quickly released, realizing the emergency braking of the safety brake.

[0018] Compared with the prior art, the utility model has the beneficial effects of: the device has a simple structure, low energy consumption, and is beneficial to improving the safety of the safety brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The circuit diagram of the utility model in the embodiment;

[0020] Figure 2 is a circuit diagram in the control box in the embodiment; DETAILED DESCRIPTION

[0021] The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Example:

[0023] like Figures 1-2 As shown, this embodiment proposes a safety brake control device, including a control box (not shown in the figure), the safety brake is provided with an electromagnet DT, the control box is provided with a transformer BK1, a time relay KT1, a relay KA1, a circuit breaker QF1, a contactor KM1, a terminal block and a control box, the control box is provided with a rectifier circuit B1, a rectifier circuit B2 and a rectifier circuit B3, the power terminals (X1, X2) on the terminal block are electrically connected to an external 380V mains, the 380V mains is divided into two 380V power supplies through the circuit breaker Q1F, one 380V power supply is connected to the transformer BK1 through a varistor RV and then output as two 20V AC power supplies, one 20V AC power supply is connected to the rectifier circuit B3, the coils of the time relay KT1 and the contactor KM1 are electrically connected to the rectifier circuit B3, the rectifier circuit B 3 is used to close the normally open contact of the time relay KT1 after being energized when the 380V power supply is lost, and to close the normally open contact of the contactor KM1 after the coil of the contactor KM1 is energized; another 380V power supply is connected to the rectifier circuit B1 through the contactor KM1 to output a 340V AC power supply, the electromagnet DT is electrically connected to the electromagnet terminal (X3, X4) on the terminal block, the output end of the 340V AC power supply is connected to the electromagnet DT power supply magnet DT high voltage suction through the relay KA1 and the electromagnet terminal (X3, X4), another 20V AC power supply is connected to the rectifier circuit B2 to store electric energy, the output end of the rectifier circuit B2 is connected to the output end of the 340V AC power supply through the series-connected diodes D1 and D2, and a 28V DC power supply is provided to the electromagnet DT, so that the electromagnet DT is in a maintained state.

[0024] Specifically, the rectifier circuit B1 includes a rectifier bridge B1 and a resistor R1 and a diode D3 connected in parallel in the output circuit of the rectifier bridge B1; the rectifier circuit B2 includes a rectifier bridge B2 and a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6 and a resistor R2 connected in parallel in the output circuit of the rectifier bridge B2, wherein C3, capacitor C4, capacitor C5 and capacitor C6 are used to store electric energy, and capacitor C5 and capacitor C6 are standby capacitors; the rectifier circuit B3 includes a rectifier bridge B3 and a capacitor C1, a capacitor C2, a capacitor C7 and a time relay KT1 connected in parallel in the output circuit of the rectifier bridge B3 The invention discloses a control circuit of a contactor KM1, wherein the control circuit of the contactor KM1 comprises a coil of the contactor KM1 and a normally open contact of a time relay KT1 connected in series; a diode D4 is connected in series between the capacitors C2 and C7 and the rectifier bridge B3, and the capacitor CT is a standby capacitor; the output end of the rectifier circuit B3 is connected to the emergency brake switch terminals (X5, X6) on the terminal block via the coil of the relay KA1, and the emergency brake switch terminals (X5, X6) are electrically connected to the emergency brake switch outside the control box; and a diode D10 is connected in parallel to the coil of the relay KA1.

[0025] In some embodiments, a travel switch is provided on the safety brake, and the travel switch is connected to a travel switch terminal on a terminal block and is electrically connected to an output end of a 340V AC power supply.

[0026] In this embodiment, the models of the rectifier bridge B1, the rectifier bridge B2 and the rectifier bridge B3 are GBJ2510, the model of the capacitor C1 is 2200uF 50V, the model of the capacitor C2, the capacitor C3, the capacitor C4, the capacitor C5, the capacitor C6 and the capacitor C7 are 10000uF 50V, the model of the varistor RV is 10D 681K, the model of the diode D4 is 1N40007, the model of the diode D1, the diode D2 and the diode D3 are 6A10; the model of the relay KA1 is RJ1SDC24V, the model of the time relay KT1 is KT1YF2-XSDC24V, the model of the contactor KM1 is NXC-12M01 / Z DC24V, the resistance of the resistor R1 is 500K, the resistance of R2 is 10K, and the model of the transformer BK1 is BK50 AC380V / AC22V; the model of the control box is JXF-3025 / 14, the model of the terminal block is TB-1508, and the model of the circuit breaker QF1 is DZ47 2P C2.

[0027] The working principle of the utility model is as follows:

[0028] Safety brake opening operation: After the circuit breaker QF1 is closed, the power is turned on at the moment. One 380V power supply is transformed by the transformer BK1 and outputs two 20V AC power supplies. One 20V AC power supply is rectified by the rectifier circuit B2 and stores the electric energy in the capacitor. The other 20V AC power supply is rectified by the rectifier circuit B3 to energize the time relay KT1. The normally open contact of the time relay KT1 is closed to energize the contactor KM1 coil. The normally open contact of the contactor KM1 is closed. When the 380V power supply is rectified by the rectifier circuit B1 and outputs 340V high voltage, the electromagnet DT is attracted. After 0.2 seconds, the timing time of the time relay KT1 is reached, and its normally open contact is disconnected. The contactor KM1 is also disconnected at the same time. At this time, the power rectified by the rectifier circuit B2 provides 28V DC power to the electromagnet through the diode D1 and the diode D2 in turn, and the electromagnet is in a maintained state.

[0029] Normal braking of the safety brake: cut off the 380V power supply, the DC power stored in the rectifier circuit B2 supplies power to the electromagnet DT to keep it in a maintained state. After discharging for 2 seconds, the voltage stored in the rectifier circuit B2 is lower than the maintenance voltage of the electromagnet DT, the electromagnet DT is released, and the safety brake achieves normal braking.

[0030] Safety brake emergency braking: The emergency brake switch terminals on the input terminal block are connected through the emergency brake switch outside the control box, so that the relay KA1 is energized, the normally closed contact of the relay KA1 is disconnected, the electromagnet DT loses power instantly and is quickly released, realizing the emergency braking of the safety brake.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety brake control device, comprising a control box, wherein the safety brake is provided with an electromagnet DT, characterized in that: The control box is provided with a transformer BK1, a time relay KT1, a relay KA1, a circuit breaker QF1, a contactor KM1, a terminal block and a control box. The control box is provided with a rectifier circuit B1, a rectifier circuit B2 and a rectifier circuit B3. The power terminals on the terminal block are electrically connected to the external 380V mains. The 380V mains is divided into two 380V power supplies through the circuit breaker Q1F. One 380V power supply is connected to the transformer BK1 and then output as two 20V AC power supplies. One 20V AC power supply is connected to the rectifier circuit B3. The coils of the time relay KT1 and the contactor KM1 are electrically connected to the rectifier circuit B3. The rectifier circuit B3 is used to close the time relay KT1 after being energized when the 380V power supply is de-energized. The normally open contact of the time relay KT1 is connected to the normally open contact of the contactor KM1 after the coil of the contactor KM1 is energized; another 380V power supply is connected to the rectifier circuit B1 through the contactor KM1 to output a 340V AC power supply, the electromagnet DT is electrically connected to the electromagnet terminal on the terminal block, the output end of the 340V AC power supply is connected to the electromagnet DT power supply magnet DT high voltage attraction through the relay KA1 and the electromagnet terminal, and another 20V AC power supply is connected to the rectifier circuit B2 to store electric energy, and the output end of the rectifier circuit B2 is connected to the output end of the 340V AC power supply through the series-connected diodes D1 and D2, providing a 28V DC power supply for the electromagnet DT, so that the electromagnet DT is in a maintained state.

2. The safety brake control device according to claim 1, characterized in that: The rectifier circuit B1 includes a rectifier bridge B1 and a resistor R1 and a diode D3 connected in parallel in an output loop of the rectifier bridge B1.

3. The safety brake control device according to claim 2, characterized in that: The rectifier circuit B2 includes a rectifier bridge B2 and capacitors C3, C4, C5, C6 and a resistor R2 connected in parallel in an output loop of the rectifier bridge B2.

4. The safety brake control device according to claim 3, characterized in that: The rectifier circuit B3 includes a rectifier bridge B3 and capacitors C1, C2, C7, a coil of a time relay KT1, and a contactor KM1 control circuit connected in parallel in the output circuit of the rectifier bridge B3. The contactor KM1 control circuit includes the coil of the contactor KM1 and the normally open contact of the time relay KT1 connected in series.

5. The safety brake control device according to claim 4, characterized in that: A diode D4 is connected in series between the capacitor C2 and the capacitor C7 and the rectifier bridge B3.

6. The safety brake control device according to claim 5, characterized in that: The output end of the rectifier circuit B3 is connected to the emergency brake switch terminal on the terminal block via the coil of the relay KA1, and the emergency brake switch terminal is electrically connected to the emergency brake switch outside the control box.

7. The safety brake control device according to claim 6, characterized in that: A diode D10 is connected in parallel to the coil of the relay KA1.

8. The safety brake control device according to any one of claims 1 to 7, characterized in that: The safety brake is provided with a travel switch, which is connected to the travel switch terminal on the terminal block and is electrically connected to the output end of the 340V AC power supply.

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