Emergency rescue device and rescue method for elevator electronic safety tongs

Abstract

The invention discloses an emergency rescue device and method for elevator electronic safety tongs, and the device comprises an operation button which is used for selecting rescue actions; the reset electromagnet emergency power supply control circuit is used for switching on the power supply of a reset electromagnet of the electronic safety tongs; the rectifying circuit is used for rectifying and filtering an input AC220V power supply; the reset electromagnet switching circuit is used for cutting off the connection between the electronic safety tongs controller and the electronic safety tongs reset electromagnet during emergency rescue operation and switching on the 220V rectifying circuit; the suction cup switching circuit is used for cutting off the connection between the electronic safety tongs controller and a suction cup of the electronic safety tongs during emergency rescue operation and switching on a 24V power supply; and the control circuit is used for inputting the emergency rescue signal and then controlling the reset electromagnet emergency power supply control circuit, the reset electromagnet switching circuit and the suction cup switching circuit. The device can realize maintenance and replacement of the electronic safety tongs controller at any position of the lift car.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, in particular to an emergency rescue device and a rescue method for an elevator electronic safety clamp. Background Art

[0002] In recent years, electronic safety clamps have been widely used in elevator safety protection systems due to their fast response, high stopping accuracy, and intelligent condition monitoring. In certain specific applications, they are gradually replacing or supplementing traditional purely mechanical safety clamps. The core control unit of an electronic safety clamp is its controller, which is responsible for receiving trigger signals and accurately controlling the action of the safety clamp's actuator to achieve reliable stopping of the car.

[0003] In current elevator design and installation practices, the electronic safety clamp controller is commonly installed on the top of the elevator car. However, this conventional car-top installation method exposes a problem during actual maintenance and rescue processes. When the elevator happens to stop at the top of the hoistway due to a malfunction or emergency, the vertical space (gap) between the car top and the structure at the top of the hoistway is usually extremely limited. In this severely restricted or even completely enclosed space, maintenance personnel cannot safely access the car top. 2. Controller replacement operations cannot be performed. If the electronic safety clamp controller fails and is damaged, a new controller must be replaced to restore the safety clamp function or perform troubleshooting. Maintenance personnel will be completely unable to access and operate the controller installation location on the car top.

[0004] The elevator industry urgently needs an innovative controller installation or replacement solution to overcome this space limitation problem and ensure reliable maintenance and replacement of electronic safety clamp controllers in any car position. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an emergency rescue box and a rescue method for an electronic safety clamp to solve the above-mentioned fault situation.

[0006] The technical solution of the present invention is to provide an emergency rescue device and rescue method for an elevator electronic safety clamp with the following structure: an operation button for selecting a rescue action; a reset electromagnet emergency power supply control circuit for connecting the power supply of the reset electromagnet of the electronic safety clamp; a rectifier circuit for rectifying and filtering the input AC220V power supply; a reset electromagnet switching circuit for cutting off the connection between the electronic safety clamp controller and the electronic safety clamp reset electromagnet during an emergency rescue operation, and connecting the 220V rectifier circuit; a suction cup switching circuit for cutting off the connection between the electronic safety clamp controller and the electronic safety clamp suction cup during an emergency rescue operation, and connecting the 24V power supply; and a control circuit for controlling the reset electromagnet emergency power supply control circuit, the reset electromagnet switching circuit and the suction cup switching circuit after inputting and outputting an emergency rescue signal.

[0007] The reset electromagnet emergency power supply control circuit, the suction cup switching circuit, and the reset electromagnet switching circuit are connected. The reset electromagnet emergency power supply control circuit is connected to the reset electromagnet switching circuit through a rectifier circuit; the reset electromagnet switching circuit and the suction cup switching circuit are connected to the electronic safety clamp controller, the reset electromagnet switching circuit is connected to the AC220 power supply, the control circuit is connected to the DC24 power supply, and the DC24 power supply is connected to the suction cup switching circuit and supplies power. The reset electromagnet switching circuit is connected to the first electronic safety clamp and the second electronic safety clamp of the elevator, the suction cup switching circuit is connected to the first electronic safety clamp and the second electronic safety clamp of the elevator, and the control circuit is connected to an emergency rescue signal input device.

[0008] The present invention also includes an emergency rescue signal input circuit, which includes a resistor R7, a resistor R8, a capacitor C6, a capacitor C7, an inductor L1, a diode D9 and an optocoupler U4. The input signal uses different operating modes to implement different rescue actions.

[0009] The reset electromagnet emergency power supply control circuit includes a relay J1, which is used to connect the power supply of the reset electromagnet.

[0010] The rectifier circuit includes a bridge rectifier D6 and a capacitor C1, and is used to rectify and filter the input AC220V power supply.

[0011] The reset electromagnet switching circuit includes relay J2, relay J3, relay J4, diode D7, and diode D8, which is used to cut off the connection between the electronic safety clamp controller and the electronic safety clamp reset electromagnet during emergency rescue operations and connect the 220V rectifier circuit.

[0012] The suction cup switching circuit includes relay J5, relay J6, diode D11, diode D12, and diode D13, which are used to cut off the connection between the electronic safety clamp controller and the electronic safety clamp suction cup during emergency rescue operations and connect to the 24V power supply.

[0013] The input signal uses different operation methods to achieve different rescue actions: The first rescue action: directly press and hold the operation button, the reset electromagnet and the maintaining electromagnet of the electronic safety clamp are attracted at the same time, after T1 time, the reset electromagnet is released, the maintaining electromagnet remains attracted, release the operation button, and the maintaining electromagnet is released; the second rescue action: press the operation button twice in succession and hold it, the reset electromagnet and the maintaining electromagnet of the electronic safety clamp are attracted at the same time, release the operation button, and the reset and maintaining electromagnets are released at the same time. If the maintenance time exceeds T2 time, the emergency rescue device enters the protection state.

[0014] When both the reset electromagnet and the suction cup are intact, the reset electromagnet is only energized for T1, and then the suction cup maintains the released state of the electronic safety clamp; when the suction cup is damaged, the released state of the electronic safety clamp is maintained by the continuous power supply of the reset electromagnet, which is forcibly disconnected after the power supply time T2, and enters the protection state for time T3.

[0015] With the above structure, the present invention has the following advantages: 1. During the rescue operation, the elevator's electronic safety clamp control box is completely disconnected, preventing the control box from re-controlling the elevator's electronic safety clamp, thereby ensuring safer rescue operations. 2. The rescue device powers the electronic safety clamp's reset electromagnet, enabling rescue operations via the rescue operation button. This solves the difficulty of rescuing elevators with electronic safety clamps located on top of the car. 3. To protect the reset electromagnet on the electronic safety clamp from damage caused by prolonged power supply, the reset button is pressed for a set time to forcibly stop outputting power, entering a protection state and further enhancing elevator safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the connection between the emergency rescue box of the electronic safety clamp of the present invention and the elevator.

[0017] Figure 2 This is a circuit diagram of the emergency rescue box of the electronic safety clamp of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, the emergency rescue device of the elevator electronic safety clamp of the present invention includes: an operation button for selecting a rescue action; a reset electromagnet emergency power supply control circuit for connecting the power supply of the reset electromagnet of the electronic safety clamp; a rectifier circuit for rectifying and filtering the input AC220V power supply; a reset electromagnet switching circuit for cutting off the connection between the electronic safety clamp controller and the electronic safety clamp reset electromagnet and connecting the 220V rectifier circuit during an emergency rescue operation; a suction cup switching circuit for cutting off the connection between the electronic safety clamp controller and the electronic safety clamp suction cup and connecting the 24V power supply during an emergency rescue operation; and a control circuit for controlling the reset electromagnet emergency power supply control circuit, the reset electromagnet switching circuit, and the suction cup switching circuit after the emergency rescue signal is input and output.

[0020] The reset electromagnet emergency power supply control circuit, the suction cup switching circuit, and the reset electromagnet switching circuit are connected. The reset electromagnet emergency power supply control circuit is connected to the reset electromagnet switching circuit through a rectifier circuit; the reset electromagnet switching circuit and the suction cup switching circuit are connected to the electronic safety clamp controller, the reset electromagnet switching circuit is connected to the AC220 power supply, the control circuit is connected to the DC24 power supply, and the DC24 power supply is connected to the suction cup switching circuit and supplies power. The reset electromagnet switching circuit is connected to the first electronic safety clamp and the second electronic safety clamp of the elevator, the suction cup switching circuit is connected to the first electronic safety clamp and the second electronic safety clamp of the elevator, and the control circuit is connected to an emergency rescue signal input device.

[0021] like Figure 2 As shown, the emergency rescue device of the elevator electronic safety clamp of the present invention includes: an emergency rescue signal input circuit, which includes a resistor R7, a resistor R8, a capacitor C6, a capacitor C7, an inductor L1, a diode D9 and an optocoupler U4, and the input signal uses different operation modes to realize different rescue actions. The ME signal source is connected to one end of the inductor L1 through the resistor R7, and the other end of L1 is connected to the cathode of the capacitor C6 and the diode D9. After C6 and D9 are connected in parallel, they are connected to the first pin of the U4 component. The second pin of the U4 component is directly grounded, and its third pin is connected to one end of the capacitor C7 and the resistor R8, and the two are connected in series to the +5V power supply. The fourth pin of U4 is connected to the EM signal line, and this signal is processed by the single-chip microcomputer U3.

[0022] like Figure 2 As shown, the reset electromagnet emergency power supply control circuit includes relay J1. Pin 1 of relay J1 is connected to pin 15 of U2. Pin 2 of relay J1 is directly connected to +24V. Pin 5 of relay J1 is connected to the first AC input terminal of the D6 bridge stack via a wire. Pin 6 of relay J1 is connected to the second AC input terminal of the D6 bridge stack via a wire. In addition, pins 5 and 6 of relay J3 are also connected to the positive (DC+) and negative (DC-) terminals of capacitor C1 via wires, forming a DC power supply output terminal for providing power to the reset electromagnet.

[0023] like Figure 2As shown, the rectifier circuit includes bridge rectifier D6 and capacitor C1, which are used to rectify and filter the incoming 220V AC power. Bridge rectifier D6 is a rectifier used to convert alternating current (AC) into direct current (DC). It has four pins, two of which are labeled "AC," representing the AC input; the other two are labeled "+" and "-," representing the DC output. The two "AC" pins of bridge rectifier D6 are connected to pins 5 and 6 of J1 via wires, respectively. Pins 1 and 2 of CN6 are connected to pins 7 and 8 of J1, respectively, to connect to the 220V AC power supply. The "+" pin of bridge rectifier D6 is connected to the positive terminal (DC+) of capacitor C1 via a wire. The "-" pin of bridge rectifier D6 is connected to the negative terminal (DC-) of capacitor C1 via a wire. Capacitor C1: Capacitor C1 is a filter capacitor used to smooth the pulsating DC output of bridge rectifier D6, providing a more stable DC voltage. The positive electrode (DC+) of capacitor C1 is connected to the "+" pin of bridge rectifier D6 through a wire. The negative electrode (DC-) of capacitor C1 is connected to the "-" pin of bridge rectifier D6 through a wire.

[0024] like Figure 2 As shown, the reset solenoid switching circuit includes relays J2, J3, J4, diodes D7, and D8. It disconnects the electronic safety gear controller from the reset solenoid and connects the 220V rectifier circuit during emergency rescue operations. Relay J2's coil pin 2 is connected to the +24V power supply, and coil pin 1 is connected to pin 14 of U2. Relay J4's coil pin 2 is connected to the +24V power supply, and coil pin 1 is connected to pin 13 of U2. Relay J2's two sets of normally open contacts (pins 6 and 8, and pins 5 and 7) disconnect the control power supply from the first safety gear. Diode D7 prevents reverse power from the rescue kit from flowing into the control power supply. Relay J4's two sets of normally open contacts (pins 6 and 8, and pins 5 and 7) disconnect the control power supply from the second safety gear. Diode D8 prevents reverse power from the rescue kit from flowing into the control power supply. Relay J2's coil pin 2 is connected to the +24V power supply, and coil pin 1 is connected to pin 16 of U2. The two sets of normally open contacts of relay J3 (pins 6 and 8, pins 5 and 7) are used to connect the emergency power supply of the reset electromagnet.

[0025] like Figure 2As shown, the suction cup switching circuit includes relay J5, relay J6, diode D11, diode D12, and diode D13. It is used to disconnect the electronic safety clamp controller from the electronic safety clamp suction cup during emergency rescue operations and connect the 24V power supply. Relay J5's coil pin 16 is connected to the +24V power supply, and pin 1 is connected to pin 12 of U2. Relay J6's coil pin 16 is connected to the +24V power supply, and pin 1 is connected to pin 12 of U2. Specifically, the +24V is connected to pin 16 of J5 and J6 via wires, while pin 1 of J5 and J6 is connected to pin 12 (Q5) of U2 via wires. Relay J5's switching contact pin 9 is connected to the +24V power supply via diode D11. Pin 11 is connected to pin 6 of CN1, powering the suction cup during normal operation. Pin 13 is connected to pin 1 of CN3, also powering the suction cup. Pin 8 of relay J6's changeover contact is connected to ground, while pin 6 is connected to pin 5 of CN2, providing power to the suction cup during normal operation. Pin 4 is connected to pin 2 of CN4, also providing power to the suction cup. Pin 4 of another changeover contact on J5 is connected to pin 2 of CN3, while pin 6 is connected to pin 5 of CN1. Pin 13 of another changeover contact on J6 is connected to pin 1 of CN4, while pin 11 is connected to pin 6 of CN2. Pin 8 of relay J5 and pin 9 of relay J6 are connected. These circuits function as voltage switching between normal operation and rescue operations. The anode of diode D12 is connected to pin 2 of CN3. The cathode of diode D12 is connected to pin 1 of CN3. The anode of diode D13 is connected to pin 2 of CN4. The cathode of diode D13 is connected to pin 1 of CN4. D12 and D13 absorb the reverse potential generated when the suction cup loses power.

[0026] The rescue method of the emergency rescue device of the elevator electronic safety clamp of the present invention: different rescue actions are realized by using different operation modes of input signals:

[0027] The first rescue action: When the reset electromagnet and the suction cup are both intact, press and hold the operation button directly. The reset electromagnet and the holding electromagnet of the electronic safety clamp will be attracted at the same time. After 0.5 seconds, the reset electromagnet will be released and the holding electromagnet will remain attracted. Release the operation button and the holding electromagnet will be released.

[0028] The second rescue action: In the case of a damaged suction cup, press the operation button twice in succession and hold it, the reset electromagnet and the maintaining electromagnet of the electronic safety clamp will be attracted at the same time, release the operation button, and the reset and maintaining electromagnets will be released at the same time. If the maintenance time exceeds 20 seconds, the emergency rescue device will enter a one-minute protection state.

Claims

1. An emergency rescue device for an elevator electronic safety clamp, characterized in that: include: Operation button, used to select rescue action; Reset electromagnet emergency power supply control circuit, used to connect the power supply of the reset electromagnet of the electronic safety clamp; Rectifier circuit, used to rectify and filter the input AC220V power supply; The reset electromagnet switching circuit is used to cut off the connection between the electronic safety clamp controller and the electronic safety clamp reset electromagnet during emergency rescue operations, and connect the 220V rectifier circuit; The suction cup switching circuit is used to cut off the connection between the electronic safety gear controller and the suction cup of the electronic safety gear during emergency rescue operations, and to connect the 24V power supply; The control circuit is used to control the reset electromagnet emergency power supply control circuit, the reset electromagnet switching circuit and the suction cup switching circuit after the emergency rescue signal is input.

2. The emergency rescue device of the elevator electronic safety clamp according to claim 1, characterized in that: The reset electromagnet emergency power supply control circuit, the suction cup switching circuit, and the reset electromagnet switching circuit are connected. The reset electromagnet emergency power supply control circuit is connected to the reset electromagnet switching circuit through a rectifier circuit; the reset electromagnet switching circuit and the suction cup switching circuit are connected to the electronic safety clamp controller, the reset electromagnet switching circuit is connected to the AC220 power supply, the control circuit is connected to the DC24 power supply, and the DC24 power supply is connected to the suction cup switching circuit and supplies power. The reset electromagnet switching circuit is connected to the first electronic safety clamp and the second electronic safety clamp of the elevator, the suction cup switching circuit is connected to the first electronic safety clamp and the second electronic safety clamp of the elevator, and the control circuit is connected to an emergency rescue signal input device.

3. The emergency rescue device of the elevator electronic safety clamp according to claim 1, characterized in that: It also includes an emergency rescue signal input circuit, which includes resistor R7, resistor R8, capacitors C6, C7, inductor L1, diode D9 and optocoupler U4. The input signal uses different operating modes to implement different rescue actions.

4. The emergency rescue device for an elevator electronic safety clamp according to claim 1, characterized in that: The reset electromagnet emergency power supply control circuit includes a relay J1 for connecting the power supply to the reset electromagnet.

5. The emergency rescue device of the elevator electronic safety clamp according to claim 1, characterized in that: The rectifier circuit includes a bridge rectifier D6 and a capacitor C1, and is used to rectify and filter the input AC220V power supply.

6. The emergency rescue device for an elevator electronic safety clamp according to claim 1, characterized in that: The reset electromagnet switching circuit includes relay J2, relay J3, relay J4, diode D7, and diode D8, which is used to cut off the connection between the electronic safety clamp controller and the electronic safety clamp reset electromagnet during emergency rescue operations and connect the 220V rectifier circuit.

7. The emergency rescue device for an elevator electronic safety clamp according to claim 1, characterized in that: The suction cup switching circuit includes relay J5, relay J6, diode D11, diode D12, and diode D13, which are used to cut off the connection between the electronic safety clamp controller and the electronic safety clamp suction cup during emergency rescue operations and connect to the 24V power supply.

8. A rescue method using the emergency rescue device of the elevator electronic safety clamp according to any one of claims 1 to 7, characterized in that: The input signal uses different operation modes to implement different rescue actions: The first rescue action: directly press the operating button, the reset electromagnet and the holding electromagnet of the electronic safety clamp are simultaneously attracted. After T1 time, the reset electromagnet is released and the holding electromagnet remains attracted. Release the operating button and the holding electromagnet is released. The second rescue action: Press the operation button twice in succession and hold it, the reset electromagnet and the maintaining electromagnet of the electronic safety clamp will be attracted at the same time, release the operation button, and the reset and maintaining electromagnets will be released at the same time. If the maintenance time exceeds T2, the emergency rescue device will enter the protection state.

9. The rescue method of the emergency rescue device of the elevator electronic safety clamp according to claim 8, characterized in that: When the reset electromagnet and the suction cup are both intact, the reset electromagnet only attracts T1, and then the suction cup maintains the release state of the electronic safety clamp; In the case of damage to the suction cup, the release state of the electronic safety clamp is maintained by the continuous power supply of the reset electromagnet. After the power supply time T2, it is forcibly disconnected and enters the protection state for time T3.

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