Elevator electric brake release system

Abstract

The utility model discloses an elevator electric brake releasing system, including AC220V power supply, electric brake releasing device, car door switch, door area switch, hoisting machine encoder and brake, the door area pilot lamp of electric brake releasing device, operation pilot lamp, speed display, voltage ratio display are connected with MCU respectively, and MCU is connected AC220V power supply through rectifier voltage reducer and forms AC220V charging loop, and detection and battery charging module are connected in parallel on AC220V charging loop, and are connected with door area pilot lamp, operation pilot lamp, start / stop switch respectively, and start / stop switch is connected to brake through the sliding transformer, and MCU is equipped with encoder input port, door loop detection port, door area detection input port and relay output port, and the relay is connected between start / stop switch and sliding transformer. The utility model discloses can improve the implementation reliability and security of electric brake releasing rescue.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically to an elevator electric brake release system. Background Technology

[0002] The application of electric brake release in elevators is a rescue method, commonly used in machine-room-less elevators and elevators with high-power traction machines in machine rooms. Currently, when using electric brake release for rescue, the brake is fully open, which often leads to excessive speed during the rescue, causing panic (panic in both the rescued person and the rescuer). When the rescuer is panicked and reacts slowly, the elevator may bottom out or overshoot. Furthermore, the elevator car's operating status cannot be directly observed during a rescue. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an elevator electric brake release system that can improve the reliability and safety of electric brake release rescue.

[0004] The technical solution of this utility model is as follows:

[0005] An elevator electric brake release system includes an AC220V power supply, an electric brake release device, a car door switch, a door zone switch, a traction machine encoder, and a brake.

[0006] The electric brake release device includes an MCU, a rectifier step-down transformer, a detection and battery charging module, a door zone indicator light, a running indicator light, a speed display, a voltage ratio display, a start / stop switch, a sliding transformer, a brake voltage adjustment knob, and a relay.

[0007] The door zone indicator, running indicator, speed display, and voltage ratio display are respectively connected to the MCU;

[0008] The MCU is connected to the AC220V power supply through a rectifier and step-down converter to form an AC220V charging circuit. The detection and battery charging module is connected in parallel to the AC220V charging circuit and is connected to the door zone indicator, the running indicator, and the start / stop switch respectively. The start / stop switch is connected to the brake through a sliding transformer. The voltage of the sliding transformer is adjusted by the voltage adjustment knob of the brake.

[0009] The MCU is equipped with an encoder input port, a door loop detection port, a door zone detection input port, and a relay output port. The encoder input port of the MCU is connected to the traction machine encoder. The door loop detection port of the MCU is connected to the car door switch to form a door loop. The door zone detection input port of the MCU is connected to the door zone switch to form a door zone detection loop. The relay output port of the MCU is connected to a relay, and the relay is connected between the start / stop switch and the sliding transformer.

[0010] When the elevator car is not in a door zone, the door zone indicator light will not illuminate, and the door zone detection circuit will be disconnected.

[0011] The door circuit being open means that the elevator car door is closed, while the door circuit being closed means that the elevator car door is not closed.

[0012] Specifically, the detection and battery charging module detects whether the AC220V charging circuit is powered on.

[0013] The voltage ratio display is used to display the voltage corresponding to the sliding transformer, and the brake voltage adjustment knob has five levels to correspond to the five voltage displays of the voltage ratio display.

[0014] The operation indicator light is used to show whether the elevator car is in a slippery state.

[0015] The start / stop switch is used to control the start and stop of the elevator car.

[0016] The speed display is used to show the gliding speed of the elevator car.

[0017] If the car rolls too fast, the relay will activate, cutting off the power supply to the brake and stopping the roll.

[0018] The door zone indicator light is used to detect whether the elevator car is level with the floor.

[0019] Compared to existing technologies, the advantages of this invention are as follows: When a power outage occurs and the elevator car is not level with the floor, the electric brake release device is used for rescue. First, check if the elevator car door is closed. If the door is closed, turn the brake voltage adjustment knob to its minimum position, then turn the start / stop switch to the start position. Slowly increase the brake voltage adjustment knob. When the running indicator light flashes, it indicates the elevator car has started to roll. The speed display shows the rolling speed. If the rolling speed is too slow, the brake voltage adjustment knob can be further increased, but not exceeding 0.3 m / s. If the rolling speed exceeds 0.3 m / s, the relay will activate, cutting off the brake power supply and stopping the rolling. When the elevator car reaches the level with the floor, the door indicator light will illuminate, and the door can be opened to release passengers. This invention greatly improves the reliability and safety of electric brake release rescue. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A connection diagram of an elevator electric brake release system provided by this utility model;

[0022] Figure 2 A circuit diagram of an elevator electric brake release system provided by this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0025] Example

[0026] Please see Figure 1 , Figure 2This embodiment provides an elevator electric brake release system, including an AC220V power supply, an electric brake release device 1, a car door switch 2, a door zone switch 3, a traction machine encoder 4, and a brake 5. The electric brake release device 1 includes an MCU 101, a rectifier step-down transformer 102, a detection and battery charging module 103, a door zone indicator light 104, a running indicator light 105, a speed display 106, a voltage ratio display 107, a start / stop switch 108, a sliding transformer 109, a brake voltage adjustment knob 110, and a relay 111. Door zone indicator 104, running indicator 105, speed display 106, and voltage ratio display 107 are connected to MCU 101. MCU 101 is connected to an AC220V power supply via a rectifier step-down converter 102 to form an AC220V charging circuit. The detection and battery charging module 103 is connected in parallel to the AC220V charging circuit and is connected to the door zone indicator 104, running indicator 105, and start / stop switch 108. The start / stop switch 108 is connected to the brake 5 via a sliding transformer 109. The voltage of the sliding transformer 109 is adjusted via the brake voltage adjustment knob 110. MCU 101 has an encoder input port, a door circuit detection port, a door zone detection input port, and a relay output port. The encoder input port of MCU 101 is connected to the traction machine encoder 4. The door circuit detection port of MCU 101 is connected to the car door switch 2 to form a door circuit. The door zone detection input port of MCU 101 is connected to the door switch 3 to form a door zone detection circuit. The relay output port of 101 is connected to relay 111, which is connected between start / stop switch 108 and sliding transformer 109.

[0027] When the elevator car is not in the door zone, the door zone indicator light 104 is not lit, and the door zone detection circuit is not open.

[0028] A closed door circuit indicates the elevator car door is properly closed; a closed door circuit indicates the elevator car door is not properly closed. The door circuit voltage can be set to DC 24V. Electric brake release for rescue is not permitted if the door circuit is closed. A closed door circuit indicates the elevator car door is not properly closed, and trapped individuals may have pried open the elevator car door, or the door may have been pried open slightly. Immediately performing electric brake release without checking the door circuit could lead to a safety accident.

[0029] In the event of a power outage and the elevator car is not level with the floor, the electric brake release device 1 is used for rescue. The AC220V charging circuit is checked for power supply via the detection and battery charging module 103.

[0030] First, determine if the door circuit is connected. If it is, turn the brake voltage adjustment knob 110 to its minimum, then turn the start / stop switch 108 to the start position. Next, slowly increase the brake voltage adjustment knob 110. The voltage ratio display 107 shows the voltage corresponding to the sliding transformer 109. The brake voltage adjustment knob 110 has five settings to correspond to the five voltage increments on the voltage ratio display 107, with each increment representing 20%. When the running indicator light 105 flashes, it indicates that the elevator car has started to run. The flashing signal comes from the traction machine encoder 4. When the traction machine rotates, the encoder 4 also rotates, causing the running indicator light 105 to flash. The speed display 106 shows the elevator car's running speed. The running speed should not exceed 0.3 m / s. Keep the running speed as low as possible to prevent it from forming a runaway mechanism. In case of panic, if the displayed speed of the elevator car is slow (0.1 m / s), the brake voltage adjustment knob 110 can be increased to adjust the opening of the brake 5 and regulate the speed of the car. When the speed display reaches 0.2 m / s, which is the ideal speed, the brake voltage adjustment knob 110 should be stopped. When the elevator car reaches the floor level and the door can be opened to let people in, the door zone detection circuit is activated, the door zone indicator light 104 illuminates, and the electric brake release automatically cuts off the power supply to the brake 5. Even if the brake voltage adjustment knob 110 is adjusted to the maximum, the car will not slip. If the car does not reach the floor level and loss of control occurs, the start / stop button 108 can be directly switched to the stop position. Even if the rescuer is panicked and slow to react, and does not switch the start / stop button 108 to the stop position, when the electric brake release detects a speed of 0.3 m / s, the relay 111 will activate, cutting off the power supply to the brake 5 and stopping the car from slipping.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An elevator electric brake release system, characterized in that: Includes AC220V power supply, electric brake release device, car door switch, door zone switch, traction machine encoder and brake; The electric brake release device includes an MCU, a rectifier step-down transformer, a detection and battery charging module, a door zone indicator light, a running indicator light, a speed display, a voltage ratio display, a start / stop switch, a sliding transformer, a brake voltage adjustment knob, and a relay. The door zone indicator, running indicator, speed display, and voltage ratio display are respectively connected to the MCU; The MCU is connected to the AC220V power supply through a rectifier and step-down converter to form an AC220V charging circuit. The detection and battery charging module is connected in parallel to the AC220V charging circuit and is connected to the door zone indicator, the running indicator, and the start / stop switch respectively. The start / stop switch is connected to the brake through a sliding transformer. The voltage of the sliding transformer is adjusted by the voltage adjustment knob of the brake. The MCU is equipped with an encoder input port, a door loop detection port, a door zone detection input port, and a relay output port. The encoder input port of the MCU is connected to the traction machine encoder. The door loop detection port of the MCU is connected to the car door switch to form a door loop. The door zone detection input port of the MCU is connected to the door zone switch to form a door zone detection loop. The relay output port of the MCU is connected to a relay, and the relay is connected between the start / stop switch and the sliding transformer.

2. The elevator electric brake release system according to claim 1, characterized in that: When the elevator car is not in the door zone, the door zone indicator light is off, and the door zone detection circuit is not open.

3. The elevator electric brake release system according to claim 1, characterized in that: The door circuit being open means that the elevator car door is closed, while the door circuit being closed means that the elevator car door is not closed.

4. The elevator electric brake release system according to claim 1, characterized in that: The detection and battery charging module is used to detect whether the AC220V charging circuit is powered on.

5. The elevator electric brake release system according to claim 4, characterized in that: The voltage ratio display is used to display the voltage corresponding to the sliding transformer, and the brake voltage adjustment knob has five positions to correspond to the five voltage displays of the voltage ratio display.

6. The elevator electric brake release system according to claim 1, characterized in that: The operation indicator light is used to show whether the elevator car is in a slippery state.

7. The elevator electric brake release system according to claim 1, characterized in that: The start / stop switch is used to control the start and stop of the elevator car.

8. The elevator electric brake release system according to claim 1, characterized in that: The speed display is used to show the gliding speed of the elevator car.

9. An elevator electric brake release system according to claim 8, characterized in that: If the car rolls too fast, the relay will activate, cutting off the power supply to the brake and stopping the rollover.

10. An elevator electric brake release system according to claim 1, characterized in that: The door zone indicator light is used to detect whether the elevator car is level with the floor.

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