CN213595656U

CN213595656U - Hoistway door lock electrical contact short circuit warning circuit

Info

Publication number: CN213595656U
Application number: CN202021819968.4U
Authority: CN
Inventors: 李海宁; 潘红星; 李士林
Original assignee: Jiangsu Elevator Guardian Network Technology Co ltd
Current assignee: Jiangsu Elevator Guardian Network Technology Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-07-02
Anticipated expiration: 2030-08-25

Abstract

The invention relates to a hoistway door lock electrical contact short circuit alarm circuit, which comprises electrical interlocking contacts, car door electrical interlocking contacts, a door lock relay, a monitoring circuit, an alarm and a monitoring relay corresponding to each hoistway door lock, wherein the electrical interlocking contacts, the car door electrical interlocking contacts and a door lock relay coil of each hoistway door lock are sequentially connected in series to form an electrical interlocking circuit, the monitoring relay is connected in parallel with a series branch of the car door electrical interlocking contacts and the door lock relay coil and is connected in series with the electrical interlocking contacts of the door lock of each hoistway door lock, the alarm circuit is formed by connecting the monitoring relay coil, a normally open contact of the door lock relay, a normally closed contact of the monitoring relay and the alarm in series, an alarm signal is effectively sent out when the electrical interlocking contacts of the hoistway door lock are in short circuit, and accidents of personnel falling or injuring are avoided.

Description

Hoistway door lock electrical contact short circuit warning circuit

Technical Field

The invention relates to an intelligent control technology, in particular to an electrical contact short-circuit alarm circuit for a hoistway door lock.

Background

The elevator control circuit is characterized in that the hoistway doors of the existing elevator are all provided with an electrical safety interlocking system, once the elevator is in a door opening state, electrical interlocking contacts of hoistway door locks are disconnected, a door lock relay of an elevator control circuit is powered off, and as the door lock relay contacts control a main loop of the elevator, the main loop of the elevator system does not work, the elevator cannot run up and down, and only when the elevator is closed, all the landing doors are closed, the car doors are also closed, the electrical interlocking contacts of all the doors are closed, and a door lock relay of the elevator control circuit is powered on and closed, referring to fig. 1, the main loop of the elevator can be powered on to work.

As shown in fig. 1, in the existing normal elevator circuit, when any hall door of an elevator is opened, the electrical interlocking contact of the hall door lock is disconnected, and due to the series circuit, the power of the door lock relay coil MSJ is lost, so that the main loop of the elevator does not work, and the elevator does not run; if the short circuit takes place for elevator third floor room door lock electrical contact, elevator third floor does not have the relation promptly, and lock relay coil MSJ can get electric, and lock relay is closed, and the elevator operation has the risk.

The elevator hall door lock short circuit means that two contacts of an artificial elevator hall door lock at a certain floor are short-circuited by a communicating line, and if the short circuit is a 3 rd hall door contact, the elevator can run in the 3 rd hall door opening state of the elevator, and the falling or ascending accident of a person is easy to happen because the hall door is irrelevant.

Disclosure of Invention

The invention aims to overcome the defects of the existing problems and provides an electrical contact short-circuit alarm circuit of a hoistway door lock, which is specifically realized by the following technical scheme:

hoistway door lock electrical contact short circuit warning circuit, including electrical interlocking contact, sedan-chair door electrical interlocking contact, lock relay, monitoring circuit, alarm and the monitoring relay who corresponds to each hoistway door lock, each hoistway door lock electrical interlocking contact, sedan-chair door electrical interlocking contact and lock relay coil concatenate in proper order and form electrical interlocking circuit, monitoring relay connects in parallel in the branch road that is concatenated by sedan-chair door electrical interlocking contact, lock relay's coil to form, and with the electrical interlocking contact of the lock of each hoistway door concatenates, monitoring circuit concatenates by monitoring relay coil, lock relay's normally open contact, monitoring relay's normally closed contact and alarm and constitutes.

The electrical contact short circuit alarm circuit of the elevator hall door lock is further designed in a way that the alarm can be an electric bulb or a buzzer or remote communication equipment.

The elevator hall door lock electrical contact short circuit alarm circuit is further designed in a way that the monitoring relay is an electromagnetic relay.

The elevator hall door lock electrical contact short circuit alarm circuit is further designed in such a way that the monitoring circuit is connected with the electrical interlocking circuit in parallel.

The invention has the following advantages:

the technical scheme of the utility model set up monitoring relay on original lift-cabin door electric interlocking system basis ingeniously through introducing monitoring relay, establish alarm circuit with lock relay, monitoring relay's corresponding contact and alarm, send alarm signal when lift-cabin door electric interlocking contact takes place the short circuit effectively, avoid taking place personnel and fall or ascending the accident of hindering.

Drawings

Fig. 1 is a schematic view of a conventional normal elevator door electric interlock system.

Fig. 2 is a short circuit alarm circuit of an electrical contact of an elevator hall door lock.

Detailed Description

The technical scheme is further explained by combining the attached drawings.

As shown in fig. 2, the alarm circuit for short circuit of the electrical contacts of the elevator hall door lock of the present embodiment mainly comprises electrical interlocking contacts (TM 1, TM2, and TM3 in this order) corresponding to the respective hall door locks, a car door electrical interlocking contact JM1, a monitoring circuit, a monitoring relay JKJ, an alarm BJ, and a door lock relay MSJ. The hall door lock electrical interlocking contacts TM1, TM2, and TM3, the car door electrical interlocking contact JM1, and the door lock relay coil MSJ are connected in series in this order. The monitoring relay coil JKJ is connected in parallel with the serial branch of the car door contact JM1 and the door lock relay coil MSJ, and is connected in series with the electrical interlocking contacts TM1, TM2 and TM3 of the door lock of each hall door. The monitoring circuit is composed of a normally open contact of the door lock relay MSJ, a normally closed contact of the monitoring relay JKJ and an alarm BJ in a cross-connection mode. In consideration of dealing with a special situation, the monitoring circuit may also use an independent power supply to supply power, and the setting manner is a conventional setting manner of those skilled in the art and is not described herein again.

The alarm of this implementation adopts the light bulb. The alarm may also be a buzzer or a remote communication device, which is not described herein in detail as it is a conventional arrangement for those skilled in the art.

In the normal state of fig. 2, since the hoistway door and the car door are opened and closed at the same time, the door is opened and closed in accordance with the electrical interlock contacts of the door lock, and the door lock relay MSJ and the monitor relay JKJ are also closed or opened at the same time.

Suppose that when the 3 rd floor landing door is short-circuited by an artificial lead, when the elevator stops at the 3 rd floor, the door lock relay coil MSJ is disconnected because the car door contact in the series circuit, and the door lock relay coil MSJ loses power and is not closed, but although the elevator is opened at the third floor, the monitoring relay coil JKJ is powered and closed because the electrical interlocking contact of the TM3 landing door lock is short-circuited. Therefore, once the elevator is in a short-circuit state of a hoistway door lock and the elevator is in a door opening state, the actions of the door lock relay MSJ and the monitoring relay JKJ are inconsistent, the power of the door lock relay coil MSJ is lost, the monitoring relay coil JKJ is electrified, the power of the door lock relay coil MSJ is lost in an alarm loop, the normally closed contact MSJ of the door lock relay is in a closed state, the monitoring relay coil JKJ is electrified, the normally open contact of the monitoring relay JKJ is closed, the alarm is electrified, and an alarm signal is sent.

According to the technical scheme, the monitoring relay is ingeniously arranged on the basis of an original elevator door electric interlocking system by introducing the monitoring relay, the corresponding contacts of the door lock relay and the monitoring relay and the alarm are constructed into an alarm circuit, the alarm signal is effectively sent out when the elevator hall door electric interlocking contacts are short-circuited, and personnel falling or ascending accidents are avoided.

The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.

Claims

1. The utility model provides an elevator room door lock electrical contact short circuit warning circuit, its characterized in that includes electrical interlocking contact, sedan-chair door electrical interlocking contact, lock relay, monitoring circuit, alarm and the monitoring relay that corresponds to each room door lock, each room door lock electrical interlocking contact, sedan-chair door electrical interlocking contact and lock relay coil concatenate in proper order and form electrical interlocking circuit, monitoring relay connects in parallel in the branch road that is formed by sedan-chair door electrical interlocking contact, lock relay's coil concatenating, and with the electrical interlocking contact of each room door lock concatenates, monitoring circuit concatenates by monitoring relay coil, lock relay's normally open contact, monitoring relay's normally closed contact and alarm and constitutes.

2. The hoistway door lock electrical contact short alarm circuit of claim 1, wherein the alarm is a light bulb or a buzzer or a remote communication device.

3. The hoistway door lock electrical contact short circuit alarm circuit of claim 1, wherein the monitor relay is an electromagnetic relay.

4. The hoistway door lock electrical contact shorting alarm circuit of claim 1, wherein the monitoring circuit is in parallel with the electrical interlock circuit.