Elevator control box automatic detection box

Abstract

The application discloses an elevator control box automatic detection box, which comprises a detection box control module, a power module, a low-voltage output switch module, a high-voltage output switch module and a controllable multi-switch relay. The power module comprises a circuit breaker, an alternating current conversion voltage stabilizing unit and an alternating current-direct current conversion voltage stabilizing unit. The low-voltage output switch module is connected to the alternating current-direct current conversion voltage stabilizing unit output end through the low-voltage input end of the elevator control box, and the control end of the low-voltage output switch module is connected to the first group of output ends of the detection box control module. The high-voltage output switch module is connected to the alternating current conversion voltage stabilizing unit output end through the high-voltage input end of the elevator control box, and the control end of the high-voltage output switch module is connected to the second group of output ends of the detection box control module. The controllable multi-switch relay is provided with at least one pair of normally open switch and normally closed switch. The elevator control box automatic detection box solves the problem that the low-voltage input module is burnt out due to the connection of the high-voltage output end and the low-voltage input module of the elevator control box in the prior art.

Description

Technical Field

[0001] This invention relates to equipment for testing elevator control boxes, specifically to an automated testing box for elevator control boxes. Background Technology

[0002] Chinese patent discloses a fully automatic elevator control cabinet testing device with application number CN202223598701.9. The device includes: a control output circuit, which includes: a power supply module, an output control module, and several controllable switch modules. There are at least two controllable switch modules, and all controllable switch modules are connected to the output terminal of the output control module. The power supply module provides power to the output control module and the controllable switch modules. The output terminal of the controllable switch module is used to connect to the input terminal of the elevator control cabinet. The control input circuit includes: an input control module, a storage module, a low-voltage input module, and a high-voltage input module. The output terminals of the low-voltage input module and the high-voltage input module are both connected to the input terminal of the input control module.

[0003] Although this fully automatic elevator control cabinet testing device can solve the problem of complicated operation steps caused by following the operating rules in the existing technology, the device still has the following drawback: when testing the elevator control box, it is inevitable that the high voltage output terminal of the elevator control box will be connected to the low voltage input terminal module, which will easily burn out the low voltage input terminal module and make it unusable. Summary of the Invention

[0004] The present invention provides an automated testing box for elevator control boxes, which solves the problem in the prior art where the low-voltage input module is burned out due to incorrect connection of the high-voltage output terminal to the low-voltage input terminal module of the elevator control box.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention discloses an automated testing box for elevator control boxes, comprising:

[0007] Detection box control module;

[0008] The power module includes: a circuit breaker, an AC power conversion and voltage regulation unit, and an AC-DC power conversion and voltage regulation unit. The circuit breaker input is connected to the 220V AC mains voltage, and the circuit breaker output is connected to the input of the AC power conversion and voltage regulation unit. The AC power conversion and voltage regulation unit converts the 220V AC mains voltage into a stable specified AC voltage. The circuit breaker output is connected to the input of the AC-DC power conversion and voltage regulation unit, and the AC-DC power conversion and voltage regulation unit converts the 220V AC mains voltage into a stable specified DC voltage.

[0009] The low-voltage output switch module connects the low-voltage input terminal of the elevator control box to the output terminal of the AC-DC conversion and voltage regulation unit, and the control terminal of the low-voltage output switch module is connected to the first set of output terminals of the detection box control module.

[0010] The high-voltage output switch module connects the high-voltage input terminal of the elevator control box to the output terminal of the AC power conversion and voltage stabilization unit, and the control terminal of the high-voltage output switch module is connected to the second set of output terminals of the detection box control module.

[0011] The controllable multi-switch relay has at least one pair of normally open and normally closed switches. The first terminals of the normally open and normally closed switches are connected to form a signal input terminal. The signal input terminal is connected to the low-voltage or high-voltage output terminal of the elevator control box. The controllable multi-switch relay is connected to a DC power supply through a coil switch circuit. The control terminal of the coil switch circuit is connected to the third set of output terminals of the detection box control module.

[0012] The low-voltage interface module has its input terminal connected to the second terminal of the normally open switch in a pair of normally open and normally closed switches, and its output terminal connected to the first set of input terminals of the detection box control module; and

[0013] The high-voltage interface module has its input terminal connected to the second terminal of the normally closed switch in a pair of normally open and normally closed switches, and its output terminal connected to the second set of input terminals of the detection box control module.

[0014] The detection box control module is equipped with a detection unit and a command switching unit. The detection unit is used to determine whether the high voltage output signal of the high voltage interface module comes from the low voltage output terminal or the high voltage output terminal of the elevator control box. When the detection unit determines that the high voltage interface output signal comes from the low voltage output terminal of the elevator control box, the command switching unit commands the detection box control module to output the input voltage signal to the control terminal of the coil switching circuit.

[0015] Preferably, the low-voltage output switch module is a controllable switching transistor, and the base of the controllable switching transistor is the control input terminal of the low-voltage output switch module.

[0016] Preferably, the high-voltage output switch module is a controllable contactor, with one end of the controllable contactor coil grounded and the other end of the controllable contactor coil serving as the control input terminal of the high-voltage output module. The high-voltage input terminal of the elevator control box is connected to the output terminal of the AC power conversion and voltage stabilization unit through the normally open switch of the controllable contactor.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This application implements a system where, when the elevator control box is being tested, it is powered by both a low-voltage output switch module and a high-voltage output switch module, enabling the elevator control box to operate. When the elevator control box is operational, either the high-voltage or low-voltage output terminal of the elevator control box can be connected to the signal input terminal of the controllable multi-switch relay. No professional is required to distinguish between the high-voltage and low-voltage output terminals of the elevator control box; by default, the controllable multi-switch relay is not energized. This default connection to the high-voltage interface module allows direct connection of all output terminals of the elevator control box. Connecting the high-voltage interface module will not damage the low-voltage interface module.

[0019] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0020] Figure 1 This is a circuit diagram of the automated testing box inside the elevator control box.

[0021] Figure 2 This is a circuit diagram of a high-voltage interface module and a controllable multi-switch relay. Detailed Implementation

[0022] To make the technical means, creative features, objectives, and effects of this invention clearer and easier to understand, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0023] like Figure 1 as well as Figure 2 As shown, this invention discloses an automated testing box for elevator control boxes, comprising:

[0024] Detection box control module;

[0025] The power module includes: a circuit breaker, an AC power conversion and voltage regulation unit, and an AC-DC power conversion and voltage regulation unit. The circuit breaker input is connected to the 220V AC mains voltage, and the circuit breaker output is connected to the input of the AC power conversion and voltage regulation unit. The AC power conversion and voltage regulation unit converts the 220V AC mains voltage into a stable specified AC voltage. The circuit breaker output is connected to the input of the AC-DC power conversion and voltage regulation unit, and the AC-DC power conversion and voltage regulation unit converts the 220V AC mains voltage into a stable specified DC voltage.

[0026] The low-voltage output switch module connects the low-voltage input terminal of the elevator control box to the output terminal of the AC-DC conversion and voltage regulation unit, and the control terminal of the low-voltage output switch module is connected to the first set of output terminals of the detection box control module.

[0027] The high-voltage output switch module connects the high-voltage input terminal of the elevator control box to the output terminal of the AC power conversion and voltage stabilization unit, and the control terminal of the high-voltage output switch module is connected to the second set of output terminals of the detection box control module.

[0028] The controllable multi-switch relay has at least one pair of normally open and normally closed switches. The first terminals of the normally open and normally closed switches are connected to form a signal input terminal. The signal input terminal is connected to the low-voltage or high-voltage output terminal of the elevator control box. The controllable multi-switch relay is connected to a DC power supply through coil switch circuit Q1. The control terminal of coil switch circuit Q1 is connected to the third set of output terminals of the detection box control module.

[0029] The low-voltage interface module has its input terminal connected to the second terminal of the normally open switch in a pair of normally open and normally closed switches, and its output terminal connected to the first set of input terminals of the detection box control module; and

[0030] The high-voltage interface module has its input terminal connected to the second terminal of the normally closed switch in a pair of normally open and normally closed switches, and its output terminal connected to the second set of input terminals of the detection box control module.

[0031] The detection box control module is equipped with a detection unit and a command switching unit. The detection unit is used to determine whether the high voltage output signal of the high voltage interface module comes from the low voltage output terminal or the high voltage output terminal of the elevator control box. When the detection unit determines that the high voltage interface output signal comes from the low voltage output terminal of the elevator control box, the command switching unit commands the detection box control module to output the input voltage signal to the control terminal of the coil switch circuit Q1.

[0032] The low-voltage output switching module is a controllable switching transistor, and the base of the controllable switching transistor is the control input terminal of the low-voltage output switching module.

[0033] The high-voltage output switch module is a controllable contactor. One end of the controllable contactor coil is grounded, and the other end of the controllable contactor coil is the control input terminal of the high-voltage output module. The high-voltage input terminal of the elevator control box is connected to the output terminal of the AC power conversion and voltage regulation unit through the normally open switch of the controllable contactor.

[0034] The high-voltage interface module steps down the output voltage signal INPUT1 from the elevator control box before outputting it, preventing damage to the detection box control module due to excessive voltage. When the output voltage signal INPUT1 from the elevator control box is high, the high-voltage interface output signal output1 is proportional to it. When the output voltage signal INPUT1 from the elevator control box is low, the high-voltage interface output signal output1 is 0. Therefore, to determine the magnitude of the output voltage signal INPUT1 from the elevator control box using the high-voltage interface output signal output1, the low-voltage interface output signal from the elevator control box (a collective term for the high-voltage and low-voltage output terminals) needs to be used. Therefore, a detection unit and a command switching unit program module are set up. By judging the magnitude of the high-voltage interface output signal output1, the controllable multi-switch relay is energized to ensure that the elevator control box output terminal can be switched to the position of the low-voltage interface module, enabling detection even when the output voltage signal INPUT1 from the elevator control box is low.

[0035] The controllable multi-switch relay RL1 can be model G2R-24-AC120, etc.

[0036] The high-voltage interface module includes: resistors R1, R2, and R3; diode D1; capacitors C1 and C2; and optocoupler U1. One end of resistor R1 is the input terminal of the high-voltage interface module, and the other end of resistor R1 is connected to the anode of the LED in optocoupler U1. The cathode of the LED in optocoupler U1 is connected to the anode of diode D1. The cathode of diode D1 is connected to the positive terminal of capacitor C1 through resistor R2. One end of the thyristor in optocoupler U1 is grounded through resistor R3, and the other end of the thyristor is connected to the positive terminal of capacitor C2. The negative terminal of capacitor C2 is grounded, and the positive terminal of capacitor C2 is the output terminal of the high-voltage interface module. Optocoupler U1 can be of model such as MOC3021.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automated testing box for elevator control panels, characterized in that, include: Detection box control module; The power module includes: a circuit breaker, an AC power conversion and voltage regulation unit, and an AC-DC power conversion and voltage regulation unit. The circuit breaker input is connected to the 220V AC mains voltage, and the circuit breaker output is connected to the input of the AC power conversion and voltage regulation unit. The AC power conversion and voltage regulation unit converts the 220V AC mains voltage into a stable specified AC voltage. The circuit breaker output is connected to the input of the AC-DC power conversion and voltage regulation unit, and the AC-DC power conversion and voltage regulation unit converts the 220V AC mains voltage into a stable specified DC voltage. The low-voltage output switch module connects the low-voltage input terminal of the elevator control box to the output terminal of the AC-DC conversion and voltage regulation unit, and the control terminal of the low-voltage output switch module is connected to the first set of output terminals of the detection box control module. The high-voltage output switch module connects the high-voltage input terminal of the elevator control box to the output terminal of the AC power conversion and voltage stabilization unit, and the control terminal of the high-voltage output switch module is connected to the second set of output terminals of the detection box control module. The controllable multi-switch relay has at least one pair of normally open and normally closed switches. The first terminals of the normally open and normally closed switches are connected to form a signal input terminal. The signal input terminal is connected to the low-voltage or high-voltage output terminal of the elevator control box. The controllable multi-switch relay is connected to a DC power supply through a coil switch circuit. The control terminal of the coil switch circuit is connected to the third set of output terminals of the detection box control module. The low-voltage interface module has its input terminal connected to the second terminal of the normally open switch in a pair of normally open and normally closed switches, and its output terminal connected to the first set of input terminals of the detection box control module; and The high-voltage interface module has its input terminal connected to the second terminal of the normally closed switch in a pair of normally open and normally closed switches, and its output terminal connected to the second set of input terminals of the detection box control module. The detection box control module is equipped with a detection unit and a command switching unit. The detection unit is used to determine whether the high voltage output signal of the high voltage interface module comes from the low voltage output terminal or the high voltage output terminal of the elevator control box. When the detection unit determines that the high voltage interface output signal comes from the low voltage output terminal of the elevator control box, the command switching unit commands the detection box control module to output the input voltage signal to the control terminal of the coil switching circuit.

2. The automated testing box for elevator control boxes according to claim 1, characterized in that, The low-voltage output switching module is a controllable switching transistor, and the base of the controllable switching transistor is the control input terminal of the low-voltage output switching module.

3. The automated testing box for elevator control boxes according to claim 2, characterized in that, The high-voltage output switch module is a controllable contactor. One end of the controllable contactor coil is grounded, and the other end of the controllable contactor coil is the control input terminal of the high-voltage output module. The high-voltage input terminal of the elevator control box is connected to the output terminal of the AC power conversion and voltage regulation unit through the normally open switch of the controllable contactor.

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