Landing door safety protection system for elevator

Abstract

The utility model relates to the technical field of elevator protection, in particular to a landing door safety protection system for an elevator, which comprises a control main board and a plurality of switch modules, each floor is provided with one switch module, the plurality of switch modules are connected in series and then connected with the control main board, and each switch module comprises a landing door auxiliary contact and a permanent magnet switch which are arranged in parallel. A permanent magnet switch and a landing door auxiliary contact are arranged to form a switch module which is used for detecting the opening and closing state of a landing door and detecting whether an elevator car is flat or not, and finally the control system judges the door pushing fault of the elevator landing door. The elevator can effectively and timely record the event that the hoistway door of the elevator is opened abnormally, the elevator is stopped after a fault is reported, and the situation that after the hoistway door is opened, people accidentally fall into a hoistway, an elevator door lock loop is closed again, and the people are possibly injured due to abnormal operation of the elevator is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator protection, in particular to a hall door safety protection system for an elevator. Background Art

[0002] The elevator hall door is the passage for passengers to enter and leave the elevator car, and its safety is crucial to the safety of passengers. Elevator hall door safety protection refers to a series of design and operation measures taken in the elevator system to ensure the safety of passengers when using the elevator. These measures usually include physical protection, safety devices, monitoring systems and operating procedures to prevent accidents and reduce potential risks.

[0003] In the existing elevator control system, when the elevator hall door is opened and the elevator car is not on this floor or the door lock contacts of the hall door are damaged and blocked, the control system will determine that the elevator door lock circuit is blocked; at this time, if the elevator is in operation, the elevator will stop urgently; if the elevator is in a stopped state, the elevator will report a door lock block fault, and then the elevator will stop and cannot be used.

[0004] After the hall door that was opened returns to normal, the elevator door lock circuit is restored. At this time, the elevator control system will assume that the elevator has returned to normal. If the elevator is at the leveling position at this time, the elevator will open the door to let people in; if the elevator is not at the leveling position at this time, the elevator will level at the nearest level and then open the door to let people in; then it will enter a waiting state and will not record the abnormal opening and closing events of the hall door, which may cause some problems.

[0005] First, after the elevator hall door is opened and restored, the elevator control system determines that the door lock circuit is open, and will eventually enter a "normal" waiting state. Obviously, the elevator automatically enters a state without relevant personnel confirming safety. At this time, if someone or other objects fall into the shaft, there is an abnormality in the shaft, and the elevator happens to be called and the elevator is running, this is very likely to cause secondary damage to the trapped personnel and equipment. Secondly, if a person is trapped in the shaft and is in a state where he cannot contact the outside world, because the elevator is in a "normal" state at this time, it is difficult for search and rescue personnel to think of searching the elevator part in the first place during the search and rescue, which is very unfavorable for the timely rescue of trapped personnel. Utility Model Content

[0006] The technical problem solved by the utility model is that the existing elevator hall door control system will not record abnormal hall door opening and closing events after the hall door fails and is prone to safety hazards.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A hall door safety protection system for an elevator comprises a control mainboard and a plurality of switch modules, wherein a switch module is provided on each floor, and the plurality of switch modules are connected in series to the control mainboard, wherein the switch module comprises a hall door auxiliary contact and a permanent magnetic switch arranged in parallel, wherein the permanent magnetic switch is normally in an open state, and a magnetic isolation plate is provided on the elevator car, and each time the car is leveled, the leveling permanent magnetic switch of the corresponding floor station is closed.

[0009] In one solution of the utility model: the hall door auxiliary contact is arranged at the door lock of the hall door on each floor, and the hall door auxiliary contact is in a closed state under normal conditions, and is in an open state when the hall door is opened.

[0010] In one solution of the utility model: the permanent magnetic switch is arranged in the hoistway at each leveling position.

[0011] In one solution of the utility model: the control mainboard includes an X5 terminal and a COM terminal, and two ends of a circuit after a plurality of switch modules are connected in series are respectively connected to the X5 terminal and the COM terminal of the control mainboard through wires.

[0012] In one solution of the utility model: the control mainboard is arranged in the control cabinet, the control cabinet comprises a COM terminal and a 552 terminal, the COM terminal of the control cabinet is connected to the COM terminal of the control mainboard, the 552 terminal of the control cabinet is connected to the X5 terminal of the control mainboard, and the two ends of the circuit after a plurality of switch modules are connected in series are respectively connected to the COM terminal and the 552 terminal of the control cabinet through wires. .

[0013] Beneficial effects of the utility model:

[0014] By setting up a permanent magnet switch and a hall door auxiliary contact to form a switch module, they are used to detect the hall door switch status and whether the elevator car is level, and finally realize the control system's judgment on the elevator hall door failure. The elevator will effectively and timely record the event that the elevator hall door has been abnormally opened, report the fault and stop the elevator, avoiding the possibility that the abnormal operation of the elevator may cause harm to personnel when the elevator door is opened and the elevator door lock circuit is restored. In addition, the timely handling of elevator failures by maintenance personnel is conducive to timely discovery of trapped personnel and professional rescue of trapped personnel, which further improves the elevator safety factor and adds a layer of safety barrier to the use of elevators.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is the circuit diagram of the utility model;

[0018] Figure 2 It is a detection flow chart of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] See also Figure 1-2 The utility model is a hall door safety protection system for elevators, including a control mainboard and several switch modules. The hall door safety protection system is an important part of ensuring the safe operation of the elevator. It monitors and controls the opening and closing of the hall door through various sensors and control logic. The control mainboard, as the brain of the system, is responsible for processing signals, executing control commands and ensuring the normal operation of safety functions. Existing control mainboards usually have the following functions: signal processing, logic control, safety monitoring, fault diagnosis, communication interface, power management, etc.

[0023] See also Figure 1-2In one embodiment of the utility model, the control main board includes an X5 terminal and a COM terminal. The control main board can be set in a control cabinet. The control cabinet includes a COM terminal and a 552 terminal. The COM terminal of the control cabinet is connected to the COM terminal of the control main board, and the 552 terminal of the control cabinet is connected to the X5 terminal of the control main board. The terminal lead wires of the control main board are connected to the control cabinet terminal, which is more convenient for connection with external lines.

[0024] See also Figure 1-2 In one embodiment of the utility model, a switch module is provided on each floor, and a plurality of switch modules are connected in series to the control main board. The switch module includes a hall door auxiliary contact and a permanent magnet switch arranged in parallel. The hall door auxiliary contact is arranged at the door lock of each hall door. The hall door auxiliary contact is in a closed state under normal conditions, and when the hall door is opened, the hall door auxiliary contact is in an open state. The permanent magnet switch is arranged in the shaft at the leveling position of each floor. The permanent magnet switch is in an open state under normal conditions. A magnetic isolation plate is arranged on the elevator car. When the car is leveled each time, the leveling permanent magnet switch of the corresponding floor station is closed. The two ends of the circuit after the plurality of switch modules are connected in series are respectively connected to the X5 terminal and the COM terminal of the control main board through wires. And then connected to the COM terminal and the 552 terminal of the control cabinet.

[0025] See also Figure 1-2 In one embodiment of the present utility model, the working principle of the present utility model is:

[0026] This application uses the elevator main board to detect door picking; a leveling permanent magnet switch is installed at each leveling position in the shaft, and a magnetic isolation plate is installed on the car side. Each time the car is leveled, the leveling permanent magnet switch of the corresponding floor station is closed; the hall door lock adds an auxiliary contact, and the switch module is formed by connecting the auxiliary contacts of the hall door locks on each floor and the corresponding leveling permanent magnet switches in parallel, and then connected in series, and then connected to the main board to determine whether it is in a dangerous door picking state. When the hall door is opened and the elevator car is on the same floor, the system will judge that it is a normal hall door opening and closing action; when the hall door is opened and the elevator car is not on the same floor, the main board will receive a feedback signal. After the main board receives this feedback signal, even if the elevator door lock is restored, the elevator will report a door picking fault. The elevator must be manually reset after the maintenance personnel confirm safety before the elevator can be operated. This can avoid possible safety hazards.

[0027] The circuit design is as follows: X5 on the elevator mainboard is defined as the door-picking feedback point, and the lead wires of JP4.5 (COM) and X5 terminals are connected to the COM and 552 terminals of the control cabinet. The auxiliary contacts (SMT) of the hall doors on each floor are connected in series through the well cable, and the auxiliary contacts of the hall doors on each floor are then connected in parallel to the corresponding leveling permanent magnetic switches (SQ) of each floor. From the design principle, when the hall door is opened, if the car is on the floor where the hall door is opened, the auxiliary contacts of the hall door lock are disconnected, and the leveling permanent magnetic switch is closed, the feedback loop is connected, and X5 (anti-door-picking) will not act; if the car is not on the floor where the hall door is opened, the hall door lock contacts are disconnected, and the leveling permanent magnetic switch is disconnected, then the feedback loop is disconnected, and X5 (anti-door-picking) acts. At this time, the elevator door-picking fault will be reported. According to the program design logic, it must be manually reset before the elevator can recover.

[0028] This application uses the circuit connection setting of the switch module and the programmable control that can be realized with the existing control logic, so that the elevator can effectively and timely record the event that the elevator hall door has been abnormally opened, report the fault and stop the elevator, avoiding the possibility that the abnormal operation of the elevator may cause harm to the personnel when the elevator door is opened and the elevator door lock circuit is restored. In addition, the timely handling of elevator failures by maintenance personnel is conducive to timely discovery of trapped personnel and professional rescue of trapped personnel, which further improves the safety factor of the elevator and adds a layer of safety barrier to the use of the elevator.

[0029] This application uses a main board for door picking detection, and the feedback point is connected in series to the auxiliary contacts of the hall door lock on each floor, and the permanent magnetic switch on each floor is connected in parallel to the auxiliary contacts of the hall door lock to determine the position of the car, and finally the control system can judge the elevator hall door picking failure. This hall door safety protection device has the following advantages: if the elevator hall door is accidentally opened, the elevator will report a fault and stop the elevator after it is restored, preventing secondary injuries to people falling into the shaft, further improving the safety factor of the elevator; it can accurately judge the position relationship between the hall door and the car, preventing the normal door opening and the normal rescue door opening from false alarms and stopping the elevator; no special operation is required, and the normal fault reset operation can be reset; the technology of this utility model is designed based on the electrical characteristics of the elevator, and is easy to operate and has strong versatility.

[0030] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the claims of the utility model.

Claims

1. An elevator hall door safety protection system, comprising a control mainboard and a plurality of switch modules, characterized in that: A switch module is provided on each floor. Several switch modules are connected in series and connected to the control main board. The switch module includes a hall door auxiliary contact and a permanent magnet switch arranged in parallel. The permanent magnet switch is normally in a disconnected state. A magnetic isolation plate is provided on the elevator car. Each time the car is leveled, the leveling permanent magnet switch of the corresponding floor station is closed.

2. The elevator hall door safety protection system according to claim 1, characterized in that: The hall door auxiliary contact is arranged at the door lock of the hall door on each floor. The hall door auxiliary contact is in a closed state under normal conditions. When the hall door is opened, the hall door auxiliary contact is in an open state.

3. The elevator hall door safety protection system according to claim 2, characterized in that: The permanent magnetic switch is arranged in the hoistway at each leveling position.

4. The elevator hall door safety protection system according to claim 3 is characterized in that: The control mainboard includes an X5 terminal and a COM terminal, and two ends of a circuit after a plurality of switch modules are connected in series are respectively connected to the X5 terminal and the COM terminal of the control mainboard through wires.

5. The elevator hall door safety protection system according to claim 4, characterized in that: The control main board is arranged in a control cabinet, which includes a COM terminal and a 552 terminal. The COM terminal of the control cabinet is connected to the COM terminal of the control main board, and the 552 terminal of the control cabinet is connected to the X5 terminal of the control main board. The two ends of the circuit after a number of switch modules are connected in series are respectively connected to the COM terminal and the 552 terminal of the control cabinet through wires.

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