CN204661066U

CN204661066U - Elevator safety circuit

Info

Publication number: CN204661066U
Application number: CN201520168669.1U
Authority: CN
Inventors: 姚珍其
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-03-25
Filing date: 2015-03-25
Publication date: 2015-09-23
Anticipated expiration: 2025-03-25

Abstract

Elevator safety circuit, comprises the passive lead-out terminal of elevator power circuit, control circuit, prediction circuit, confession internet use; Power circuit is made up of power supply, air switch, positive contactor, reversion contactless switch, thermal relay and motor.Above or below forward and backward contactless switch, be connected in series a contactless switch respectively, AC contactor and the former contactless switch of serial connection match.Two coils of positive contactor are in parallel, and two coils of reversion contactless switch are in parallel.The utility model can stop the accident time delay release of AC contactor completely, and coil blackout main contact disconnects motor power fast in 80 milliseconds, and 100% is safe and reliable.Contactless switch auxiliary contact composition " AND circuit ", when carrying out accident time delay, report prediction accident alarming mutually, and output to passive terminal through relay self-sustaining warning, motor overload is reported to the police passive output, informs on duty and maintainer for computer and remote alarms.

Description

Elevator safety circuit

Technical field

The utility model relates to a kind of elevator safety circuit, especially prevents from slipping the elevator safety circuit of terraced accident.

Background technology

The elevator that China uses at present has millions of, and along with the passing of period of service, elevator safety fault is increasing, and the major failure of safety slips ladder, is secondly terraced door folder people tong.China's elevator safety accident happens occasionally, and according to incompletely statistics, death toll reaches 40 people in more 1 year, wherein repair and maintenance personnel 13 people.Slip the major cause of ladder, one is brake failure, and two is that AC contactor accident time delay release caused.In current maintenance process, maintainer mainly checks brake troubles, control protective unit, safety protection device, inhibiting device etc., be difficult to find contactless switch fault, because just there is once accident time delay thousands of times or 100,000 times in an AC contactor, when the AC contactor iron that spreads out produces dirt and remanent magnetism or iron core hair fastener and fall into foreign matter, there is abnormal time delay release, this is danger close, if this time delay reaches 400 milliseconds, elevator not flat bed can be greater than more than 500mm, when accident time delay 1 ~ 2 second, elevator rises or declines and reaches more than 3 meters, time delay is longer, danger is larger, the complete get out of hand effect of other fender guards, more dangerous than brake failure.Maintainer cannot know when contactless switch can having an accident property delay fault.

Utility model content

The technical problems to be solved in the utility model is: solve the accident time delay release of AC contactor, provide a kind of elevator safety circuit.

The technical solution adopted in the utility model is: elevator safety circuit, comprises the passive lead-out terminal of elevator power circuit, control circuit, prediction circuit, confession internet use; Power circuit is made up of power supply, air switch, positive contactor, reversion contactless switch, thermal relay and motor, and it is characterized in that, be connected in series a contactless switch above or below forward and backward contactless switch respectively, AC contactor and the former contactless switch of serial connection match.

Two coils of positive contactor are in parallel, and two coils of reversion contactless switch are in parallel.

Two positive contactors are connected with two reversion contactless switchs, and in positive contactor, the auxiliary contact of KM1-1 and the auxiliary contact of KM1-2 form AND circuit, be tandem time differential prediction and alarm, report to the police through intermediate relay J2, J3 self-sustaining; In reversion contactless switch, the auxiliary contact of KM2-1 and the auxiliary contact of KM2-2 form AND circuit, be tandem time differential prediction and alarm, report to the police through intermediate relay J4, J5 self-sustaining.

When 4 main AC contactor have accident delay fault, passive terminal is to computer and attendant's prediction and alarm, and elevator can normally work, and maintainer can normal maintain and replace contactless switch.

The utility model has following good effect: owing to being connected in series another forward and backward contactless switch above or below forward and backward contactless switch respectively, namely KM1-1 is connected in series KM1-2, KM2-1 is connected in series KM2-2, contactless coil is in parallel, coil blackout main contact can be reached in 80ms, disconnect motor power fast, stop the accident time delay release of AC contactor completely, 100% is safe and reliable.Contactless switch auxiliary contact composition " AND circuit ", when carrying out accident time delay, report prediction accident alarming mutually, and output to passive terminal through relay self-sustaining warning, motor overload is reported to the police passive output, informs on duty and maintainer for computer and remote alarms.

Accompanying drawing explanation

Fig. 1 is elevator safety power circuit and secondary connection schematic diagram;

Fig. 2 is the accident delayed alarm secondary connection circuit diagram of prediction;

Fig. 3 is passive warning circuit lead-out terminal schematic diagram.

Detailed description of the invention

Shown in Fig. 1, elevator safety power circuit and secondary connection schematic diagram, power circuit is made up of power supply, air switch, positive contactor, reversion contactless switch, thermal relay and motor, it is characterized in that, a contactless switch is connected in series respectively above or below forward and backward contactless switch, namely KM1-1 is connected in series KM1-2, KM2-1 and is connected in series KM2-2, and contactless switch and the former contactless switch of serial connection match.When accident time delay appears in KM1-1, KM1-2 normally can disconnect motor power and drg power supply, can accurate flat bed, KM1-1 and KM1-2 can also stagger mutually the generation of accident; When accident time delay appears in KM2-1, KM2-2 normally can disconnect motor power and drg power supply, can accurate flat bed, and the contactless switch of serial connection can also stagger mutually the generation of accident.Power circuit can be used for door-opened elevator and closes gate circuit, prevents the generation of contactless switch or relay accident time delay release casualty accident.From Fig. 1 right part, in positive contactor, two coils of KM1-1 and KM1-2 are in parallel, and two coils of reversion contactless switch KM2-1 and KM2-2 are in parallel.When motor heat relay J R current overload, intermediate relay J1-1 disconnects, J1-2 self-insurance, prevents motor from again starting, and sets up instruction and report to the police.Overload warning, can cut off 4 AC coil power supplys.

Shown in Fig. 2, predict accident delayed alarm secondary connection circuit diagram, two positive contactors are connected with two reversion contactless switchs, in positive contactor, the auxiliary contact of KM1-1 and the auxiliary contact of KM1-2 form AND circuit, for tandem time differential prediction and alarm, report to the police through intermediate relay J2, J3 self-sustaining, elevator can also normally run.In reversion contactless switch, the auxiliary contact of KM2-1 and the auxiliary contact of KM2-2 form AND circuit, be tandem time differential prediction and alarm, and report to the police through intermediate relay J4, J5 self-sustaining, elevator can also normally run.As warning will be removed, disconnect air switch DF1P.Contactless switch auxiliary contact composition " AND circuit ", when carrying out accident time delay, mutual report prediction accident alarming, inform that another contactless switch of people has problem, and output to passive terminal through relay self-sustaining warning, (having normally-open normally-close) is for computer and pass to internet outward to watch house.After warning, elevator can also normally run.

It is passive warning circuit lead-out terminal schematic diagram shown in Fig. 3.20 terminals are provided with in figure, the figure left side is 5 relay J 1, J2, J3, J4, J5, figure the right is 20 mouths, 1 and 2 terminals are motor overload, 2 and 3 terminals are that motor is normal, 4 and 5 terminals are forecast KM1-1 time delay fault in advance, 6 and 7 terminals are that KM1-1 is normal, 8 and 9 terminals are forecast KM1-2 time delay fault in advance, 10 and 11 terminals are that KM1-2 is normal, and 12 and 13 terminals are forecast KM2-1 time delay fault in advance, and 14 and 15 terminals are that KM2-1 is normal, 16 and 17 terminals are forecast KM2-2 time delay fault in advance, and 18 and 19 terminals are that KM2-2 is normal.Motor overload is reported to the police passive output, on duty and maintainer is informed for computer and remote alarms, 4 main AC contactor have the passive terminal of accident delay fault to computer and attendant's prediction and alarm, and elevator can normally work, and maintainer can normal maintain and replace contactless switch.

For old or that accident is many elevator, top box is set up in suggestion, to increase exchanges contactless switch by this patent design.During elevator service personnel maintenance, want conscientious observed and recorded before changing contactless switch, prevent good AC contactor to change mistakenly.

This circuit layout also can be used for rotating precision limit, crane, driving etc.

Claims

1. elevator safety circuit, comprises the passive lead-out terminal of elevator power circuit, control circuit, prediction circuit, confession internet use; Power circuit is made up of power supply, air switch, positive contactor, reversion contactless switch, thermal relay and motor, and it is characterized in that: above or below forward and backward contactless switch, be connected in series a contactless switch respectively, AC contactor and the former contactless switch of serial connection match.

2. elevator safety circuit according to claim 1, is characterized in that, two coils of positive contactor are in parallel, and two coils of reversion contactless switch are in parallel.

3. elevator safety circuit according to claim 1, it is characterized in that, two positive contactors are connected with two reversion contactless switchs, in positive contactor, the auxiliary contact of KM1-1 and the auxiliary contact of KM1-2 form AND circuit, for tandem time differential prediction and alarm, report to the police through intermediate relay J2, J3 self-sustaining; In reversion contactless switch, the auxiliary contact of KM2-1 and the auxiliary contact of KM2-2 form AND circuit, be tandem time differential prediction and alarm, report to the police through intermediate relay J4, J5 self-sustaining.