On-site emergency stop switch action prompting and reset prompting system and method

Abstract

The invention discloses an on-site emergency stop switch action prompting and reset reminding system and method.The system comprises a main control board, an emergency stop switch, a rising edge detector, an operation contactor, two band-type brake contactors, a door lock contactor, an emergency stop switch action indicating lamp and a buzzer, and a first input point of the main control board is connected with a normally-open contact of the emergency stop switch; a second input point of the main control board is connected with the rising edge detector, a first output point of the main control board is connected with one end of a coil of the operation contactor, a second output point of the main control board is connected with one end of a coil of the first band-type brake contactor, and a third output point of the main control board is connected with one end of a coil of the second band-type brake contactor. The other end of the coil of the operation contactor, the other end of the coil of the first band-type brake contactor and the other end of the coil of the second band-type brake contactor are connected with a normally-open contact of the door lock contactor, a fourth output point of the main control board is connected with an emergency stop switch action indicating lamp, and a fifth output point of the main control board is connected with the buzzer. The emergency stop switch has the functions of on-site emergency stop switch action prompt and reset prompt.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a system and method for prompting an action and resetting a on-site emergency stop switch. Background Art

[0002] In the existing design of elevators, when on-site maintenance personnel enter the shaft to repair and maintain the elevator, they must first activate the emergency stop switch. After the maintenance is completed, due to the lack of emergency stop switch actuation reminder, they often forget to reset the emergency stop switch, resulting in repeated work. This repeated work includes: reopening the floor door to reset the emergency stop; or short-circuiting the safety circuit, completing the maintenance first, then removing the short-circuit wire, and then resetting the emergency stop switch. This method is risky; or it is necessary to check which section of the safety circuit is blocked, which is time-consuming and laborious. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a system and method for on-site emergency stop switch action prompting and reset reminding.

[0004] The technical solution of the present invention is as follows:

[0005] A system for prompting and resetting an emergency stop switch on site comprises a main control board, an emergency stop switch, a rising edge detector, a running contactor, a first brake contactor, a second brake contactor, a door lock contactor, an emergency stop switch action indicator light and a buzzer. The main control board is provided with a first input point, a second input point, a first output point, a second output point, a third output point, a fourth output point and a fifth output point. The first input point of the main control board is connected to a normally open contact of the emergency stop switch, the second input point of the main control board is connected to a rising edge detector, the first output point of the main control board is connected to one end of a coil of the running contactor, the second output point of the main control board is connected to one end of a coil of the first brake contactor, the third output point of the main control board is connected to one end of a coil of the second brake contactor, the other ends of the coils of the running contactor, the first brake contactor and the second brake contactor are connected to the normally open contact of the door lock contactor, the fourth output point of the main control board is connected to the emergency stop switch action indicator light, and the fifth output point of the main control board is connected to a buzzer.

[0006] Furthermore, the main control board is also provided with an input common point, a first passive output point, a second passive output point, a first output common point and a second output common point. The first input point, the second input point and the input common point of the main control board are arranged side by side, the first passive output point and the second passive output point of the main control board are arranged side by side, the first output point, the second output point, the third output point and the first output common point of the main control board are arranged side by side, and the fourth output point, the fifth output point and the second output common point of the main control board are arranged side by side.

[0007] Furthermore, the emergency stop switch, rising edge detector, input common point of the main control board, emergency stop switch action indicator light, buzzer, and the second output common point of the main control board are all connected to the emergency power supply charging circuit, and the door lock contactor and the first output common point of the main control board are connected to the rear-end power supply of the safety door lock circuit.

[0008] A method for prompting and resetting an on-site emergency stop switch, comprising the following steps:

[0009] S1. When the emergency stop switch is activated, the first input point of the main control board has a signal input and cuts off the safety circuit and the emergency power charging circuit at the same time;

[0010] S2, when the first input point of the main control board is detected to have a signal input, the fourth output point of the main control board is output, the emergency stop switch action indicator light is on, and at the same time the emergency power charging circuit is disconnected to output DC24V, passing through the door lock circuit and the first passive output point and the second passive output point of the main control board, and finally entering the second input point of the main control board through the rising edge detector;

[0011] S3, when the second input point of the main control board detects a rising edge signal from 0 to 1, and the first input point of the main control board is valid, the fifth output point of the main control board outputs, driving the buzzer to sound;

[0012] S4. When the emergency stop switch is reset, the fourth and fifth output points of the main control board stop outputting, the emergency stop switch action indicator light goes out, and the buzzer stops beeping.

[0013] In step S1, the first passive output point and the second passive output point of the main control board are output with a delay of 2S.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the present invention has the functions of on-site emergency stop switch action prompt and reset reminder; when the on-site technician actuates the emergency stop switch, the emergency stop switch action indicator light will light up; when the door lock changes from disconnected to connected, the buzzer will sound, thereby reminding the technician that the emergency stop switch has not been reset; when the technician resets the emergency stop switch, the emergency stop switch action indicator light goes out and the buzzer stops beeping. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the system composition of the present invention;

[0017] Figure 2 Schematic diagram of the circuit of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0020] Example

[0021] See also Figure 1 , this embodiment provides a system for on-site emergency stop switch action prompt and reset reminder, including a main control board, an emergency stop switch, a rising edge detector, a running contactor, a first brake contactor, a second brake contactor, a door lock contactor, an emergency stop switch action indicator light and a buzzer. The main control board is provided with a first input point, a second input point, an input common point, a first output point, a second output point, a third output point, a first output common point, a fourth output point, a fifth output point and a second output common point; the first input point, the second input point and the input common point of the main control board are arranged side by side, the first input point of the main control board is connected to the normally open contact of the emergency stop switch, and the second input point of the main control board is connected to the rising edge detector; the first passive output point and the second passive output point of the main control board are arranged side by side; the first output point, the second output point, the third output point and the first output common point of the main control board are arranged side by side, the first output point of the main control board is connected to one end of the coil of the running contactor, the second output point of the main control board is connected to one end of the coil of the first brake contactor, the main control The third output point of the board is connected to one end of the coil of the second brake contactor, and the other ends of the coils of the running contactor, the first brake contactor, and the second brake contactor are connected to the normally open contact of the door lock contactor. The purpose is to prevent 24V emergency current from entering the contactor coil, which is safer; the fourth output point, the fifth output point, and the second output common point of the main control board are arranged side by side, the fourth output point of the main control board is connected to the emergency stop switch action indicator light, and the fifth output point of the main control board is connected to the buzzer; the emergency stop switch, the rising edge detector, the input common point of the main control board, the emergency stop switch action indicator light, the buzzer, and the second output common point of the main control board are all connected to the emergency power supply charging circuit, and the door lock contactor and the first output common point of the main control board are connected to the back-end power supply of the safety door lock circuit.

[0022] Based on the above system, the on-site emergency stop switch action prompt and reset method is combined with Figure 2 As shown, the following steps are included:

[0023] S1. When the technician activates the emergency stop switch, the first input point of the main control board has a signal input and cuts off the safety circuit and the emergency power charging line at the same time. The first passive output point and the second passive output point of the main control board delay the output by 2S to ensure that the safety circuit voltage does not flow into the emergency power supply 24V output;

[0024] S2, when the first input point of the main control board is detected to have a signal input, the fourth output point of the main control board is output, the emergency stop switch action indicator light is on, and at the same time the emergency power charging line (AC220V) is disconnected to output DC24V, which passes through the door lock circuit and the first passive output point and the second passive output point of the main control board, and finally enters the second input point of the main control board through the rising edge detector (rising edge is valid);

[0025] S3, when the second input point of the main control board detects a rising edge signal from 0 to 1 (i.e., the door lock changes from disconnected to connected, simulating the state of on-site maintenance personnel coming out of the well), and the first input point of the main control board is valid, the fifth output point of the main control board outputs, driving the buzzer to sound, reminding the technician that the emergency stop switch has not been reset;

[0026] S4. When the technician resets the emergency stop switch, the fourth and fifth output points of the main control board stop outputting, the emergency stop switch action indicator light goes out, and the buzzer stops beeping.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for prompting and resetting emergency stop switches on site, characterized in that: It includes a main control board, an emergency stop switch, a rising edge detector, a running contactor, a first brake contactor, a second brake contactor, a door lock contactor, an emergency stop switch action indicator light and a buzzer. The main control board is provided with a first input point, a second input point, a first output point, a second output point, a third output point, a fourth output point and a fifth output point. The first input point of the main control board is connected to the normally open contact of the emergency stop switch, the second input point of the main control board is connected to the rising edge detector, the first output point of the main control board is connected to one end of the coil of the running contactor, the second output point of the main control board is connected to one end of the coil of the first brake contactor, the third output point of the main control board is connected to one end of the coil of the second brake contactor, the other ends of the coils of the running contactor, the first brake contactor and the second brake contactor are connected to the normally open contact of the door lock contactor, the fourth output point of the main control board is connected to the emergency stop switch action indicator light, and the fifth output point of the main control board is connected to the buzzer.

2. According to claim 1, a system for on-site emergency stop switch action prompt and reset reminder, characterized in that: The main control board is also provided with an input common point, a first passive output point, a second passive output point, a first output common point and a second output common point. The first input point, the second input point and the input common point of the main control board are arranged side by side, the first passive output point and the second passive output point of the main control board are arranged side by side, the first output point, the second output point, the third output point and the first output common point of the main control board are arranged side by side, and the fourth output point, the fifth output point and the second output common point of the main control board are arranged side by side.

3. According to claim 2, a system for prompting and resetting emergency stop switches on site, characterized in that: The emergency stop switch, rising edge detector, input common point of the main control board, emergency stop switch action indicator light, buzzer, and second output common point of the main control board are all connected to the emergency power supply charging circuit, and the door lock contactor and the first output common point of the main control board are connected to the rear end power supply of the safety door lock circuit.

4. The method for on-site emergency stop switch action prompt and reset according to claim 3, characterized in that: The following steps are involved: S1. When the emergency stop switch is activated, the first input point of the main control board has a signal input and cuts off the safety circuit and the emergency power charging circuit at the same time; S2, when the first input point of the main control board is detected to have a signal input, the fourth output point of the main control board is output, the emergency stop switch action indicator light is on, and at the same time the emergency power charging circuit is disconnected to output DC24V, passing through the door lock circuit and the first passive output point and the second passive output point of the main control board, and finally entering the second input point of the main control board through the rising edge detector; S3, when the second input point of the main control board detects a rising edge signal from 0 to 1, and the first input point of the main control board is valid, the fifth output point of the main control board outputs, driving the buzzer to sound; S4. When the emergency stop switch is reset, the fourth and fifth output points of the main control board stop outputting, the emergency stop switch action indicator light goes out, and the buzzer stops beeping.

5. A method for prompting and resetting an on-site emergency stop switch according to claim 4, characterized in that: In step S1, the first passive output point and the second passive output point of the main control board are output with a delay of 2S.

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