CN-121974219-A - System for be used for elevator well emergency exit by short circuit safety protection

CN121974219ACN 121974219 ACN121974219 ACN 121974219ACN-121974219-A

Abstract

The invention discloses a system for short-circuit safety protection of an elevator hoistway safety door, which comprises a main control board, a first detection circuit, a second detection circuit and a protection device, wherein the first detection circuit is electrically connected with the main control board and is used for detecting the on-off state of an elevator safety circuit comprising a first hoistway safety door switch, the second detection circuit is electrically connected with the main control board and is arranged independent of the elevator safety circuit and comprises a second hoistway safety door switch, the second detection circuit is used for detecting the on-off state of the hoistway safety door, the protection device is electrically connected with the main control board, and the main control board is used for controlling the protection device to start when the first detection circuit detects that the elevator safety circuit is in an on-state and the second detection circuit detects that the hoistway safety door is in an on-state. The invention can obviously improve the safety of elevator operation and effectively ensure the life safety of personnel.

Inventors

LING YONGSHUN
WU KAIBIN
YANG QINGYUN

Assignees

快意电梯股份有限公司
河南中原快意电梯有限公司

Dates

Publication Date: 20260505
Application Date: 20260127

Claims (10)

1. A system for shorted security of hoistway security doors, comprising: A main control board; the first detection circuit is electrically connected with the main control board and is used for detecting the on-off state of an elevator safety loop comprising a first hoistway safety door switch; The second detection circuit is electrically connected with the main control board, is independent of the elevator safety loop and comprises a second hoistway safety door switch, and is used for detecting the opening or closing state of the hoistway safety door; the protection device is electrically connected with the main control board; The main control board is used for controlling the protection device to start when the first detection circuit detects that the elevator safety loop is in a connection state and the second detection circuit detects that the hoistway safety door is in an opening state.
2. The system for short-circuit safety protection of the safety door of the elevator hoistway according to claim 1, further comprising a weighing device electrically connected with the main control board, wherein the main control board is further used for judging whether the elevator is in an idle state according to the weighing value detected by the weighing device, controlling the elevator not to start running when the elevator is in the idle state and in a static state, and controlling the elevator not to start running after the elevator is in a nearby flat floor when the elevator is in the idle state and in a running state.
3. The system of claim 2, wherein the main control panel is further configured to control the elevator to automatically open the door when the elevator is in a non-empty state and to control the elevator to not start operating after the elevator is closed, and to control the elevator to automatically open the door near a floor when the elevator is in a non-empty state and operating state and to control the elevator to not start operating after the elevator is closed.
4. The system for short-circuited safety protection of a hoistway safety door according to claim 3, further comprising a voice broadcasting device electrically connected to the main control board, wherein the main control board is further configured to control the voice broadcasting device to perform voice broadcasting when the elevator is in a non-empty state.
5. The system for short-circuit safety protection of the safety door of the elevator hoistway according to claim 1, further comprising a visual camera electrically connected with the main control board, wherein the visual camera is used for detecting whether a person approaches the outside of the safety door of the hoistway, the protection device comprises a buzzer arranged on a control cabinet, and the main control board is further used for controlling the buzzer to sound when the visual camera detects that the person approaches the safety door of the hoistway.
6. The system for shorted safety protection of a hoistway safety door according to claim 1, wherein the protection device comprises an alarm and an indicator light, and the main control board controls the protection device to be started, including controlling the alarm to alarm and controlling the indicator light to be lighted.
7. The system for shorted safety protection of an elevator hoistway safety door according to claim 6, wherein the alarm is installed outside a hoistway safety lobby and the indicator light is installed in a control cabinet.
8. The system for shorted safety protection of an elevator hoistway safety door of claim 1, further comprising an elevator running light electrically connected to the main control board, the elevator running light disposed outside of a hoistway safety hall, the main control board further configured to control the elevator running light to illuminate when the elevator is running.
9. The system for shorted safety protection of hoistway safety doors according to claim 4, wherein the weighing device is connected to the main control board via a CAN1 communication bus, and the voice broadcasting device is connected to the main control board via a CAN2 communication bus.
10. The system for short-circuited safety protection of an elevator hoistway safety door according to claim 1, wherein the second hoistway safety door switch is a normally closed switch, the second hoistway safety door switch is electrically connected to an input point of the main control board, and the main control board determines an open or closed state of the hoistway safety door by detecting a signal state of the input point.

Description

System for be used for elevator well emergency exit by short circuit safety protection Technical Field The invention relates to the technical field of elevator safety protection, in particular to a system for protecting the safety of a shorted safety door of an elevator hoistway. Background In existing designs of elevators, the hoistway safety door is typically equipped with only one set of electrical switches in series in the safety circuit of the elevator. The design can effectively ensure the operation safety of the elevator under normal conditions. However, when the elevator safety circuit is shorted for some reason (e.g., the circuit containing the safety door electrical switch is shorted), the electrical switch of the hoistway safety door may fail. In this case the elevator can still be operated normally. If a technician performs illegal operation or opens a hoistway safety door and enters the hoistway under the condition that the running state of the elevator is not determined, or a person outside a floor hall where the hoistway safety door is located cannot judge whether the elevator is running or not, and the safety door can be opened in the running process of the elevator, great potential safety hazards are brought, and serious accidents such as personnel falling and clamping injury by moving parts can be caused. The safety loop is short-circuited and cannot effectively detect the state of the safety door of the well, so that the elevator can still operate under unsafe conditions, and the life safety of personnel is seriously threatened. In view of the above, there is a need in the art for improvements. Disclosure of Invention The invention discloses a system for protecting safety of a hoistway safety door by short circuit, which aims to solve the technical problem that when a hoistway safety circuit is short-circuited, an electrical switch of the hoistway safety door fails, so that an elevator can still operate under unsafe conditions, and serious threat is caused to personnel life safety. The technical scheme of the invention is as follows: a system for shorted security protection of hoistway security doors, comprising: A main control board; the first detection circuit is electrically connected with the main control board and is used for detecting the on-off state of an elevator safety loop comprising a first hoistway safety door switch; The second detection circuit is electrically connected with the main control board, is independent of the elevator safety loop and comprises a second hoistway safety door switch, and is used for detecting the opening or closing state of the hoistway safety door; the protection device is electrically connected with the main control board; The main control board is used for controlling the protection device to start when the first detection circuit detects that the elevator safety loop is in a connection state and the second detection circuit detects that the hoistway safety door is in an opening state. The elevator control system comprises a main control board, a weighing device, a control board and a control system, wherein the main control board is used for controlling the elevator to run in a non-load state according to a weighing value detected by the weighing device, and controlling the elevator to run when the elevator is in the non-load state and in a static state, and controlling the elevator to run when the elevator is in the non-load state and in a running state after the elevator is in a layer leveling nearby. And if the elevator is in a non-empty state and in a running state, the main control board controls the elevator to automatically open the door near a flat floor and controls the elevator to not start to run after the elevator is closed. The elevator system further comprises a voice broadcasting device electrically connected with the main control board, wherein the main control board is also used for controlling the voice broadcasting device to conduct voice broadcasting when the elevator is in a non-empty state. The protection device comprises a control cabinet, a main control board, a control cabinet, a visual camera, a buzzer and a control panel, wherein the control board is used for controlling the control cabinet to control the elevator, the control panel is used for controlling the elevator to stop the elevator, and the control panel is used for controlling the elevator to stop the elevator. Further, the protection device comprises an alarm and an indicator lamp, and the main control board controls the protection device to start, including controlling the alarm to alarm and controlling the indicator lamp to light. Furthermore, the alarm is arranged outside a hoistway security hall, and the indicator lamp is arranged in the control cabinet. The elevator operation indicator lamp is electrically connected with the main control board, the elevator operation indicator lamp is arranged outside a hoistway security hall, and the main control board