CN104192664B

CN104192664B - A kind of elevator door lock loop safety guard

Info

Publication number: CN104192664B
Application number: CN201410385739.9A
Authority: CN
Inventors: 高晋峰; 阮彦; 刘亚伟; 孙卫兵
Original assignee: JIANGSU MONTMERY ELEVATOR CO Ltd
Current assignee: JIANGSU MONTMERY ELEVATOR CO Ltd
Priority date: 2014-08-07
Filing date: 2014-08-07
Publication date: 2016-06-22
Anticipated expiration: 2034-08-07
Also published as: CN104192664A

Abstract

The invention discloses a kind of elevator door lock loop safety guard; including loop of the door lock; described loop of the door lock is in series with some door interlock switches; it is in series with door lock protector between adjacent two door interlock switches in described loop of the door lock; described door lock protector includes audion; it is connected in series with load between c pole and the b pole of described audion; electric capacity; relay and rectification circuit; one of them load is also connected in parallel to light emitting diode, and the contact switch of described relay is connected in described loop of the door lock。The present invention is by having improved original loop of the door lock; add door lock protector; thus repair and maintenance personnel can quickly judge the position of failure point of loop of the door lock; can intuitively arrive elevator door electrical wiring situation; and have employed special envelope line mode and stopped because omitting the human accident etc. that wire jumper occurs; substantially increase the reliability of elevator safety operation, also shorten the maintenance time after elevator faults to greatest extent。

Description

A kind of elevator door lock loop safety guard

Technical field

The present invention relates to a kind of elevator door lock loop, be specifically related to a kind of elevator door lock loop with door lock protector。

Background technology

The loop of the door lock of elevator is the important component part of elevator safety measure, is the basic guarantee of elevator operation, and as occurred, careless mistake frequently can lead to the generation of security incident to this part。In recent years, due to the increase of elevator quantity, increasing the weight of of repair and maintenance work, the maintenance personnel of elevator is made to have neglected the investigation to potential safety hazard, when Lift out of order, owing to the hidden danger of safety return circuit result in the extension of fault, thus causing the generation of accident。Especially ladder accident is walked in this enabling often heard for several years, and being all much that loop of the door lock is abnormal causes。Problem like this is a lot, at present, the increase of China's elevator quantity and repair and maintenance personnel can not form direct ratio, harmful competition also makes the total quality of personnel decline, requirement according to relevant national standard, the repair and maintenance time of one elevator should more than two hours, that is two repair and maintenance works actually one day can repair and maintenance elevator 3-4 platform, according to 15 days computation of Period, monthly per capita can repair and maintenance elevator quantity at about 25, in reality the elevator of repair and maintenance worker management will considerably beyond this numeral。According to analytic statistics in industry, the elevator faults of more than 70% goes out on elevator door, and adjusts difference display according to 2013 CCTVs, and the interviewee of 21.74% claims to be commonly encountered elevator faults。

At present, elevator technology personnel easily there is a problem in that one in loop of the door lock is maintained, ignore or impotentia inspection door lock electrical conditions, portion's layered gate earth lead comes off, door lock line breakage is turned on by gate metal layer device, causing that layer door metalwork is charged, there will be severe opens the door runs the major safety risks of ladder；Two, owing to loop of the door lock is series loop, in multi-level elevator, after layer door lock breaks down, because layer door is numerous, it is impossible to quickly failure judgement point, making maintenance time long, affect the normal use of elevator, owner's suggestion is big；Three, because of latch failure, for convenience of elevator reparing, after elevator is overhauled by maintainer short circuit loop of the door lock, forgetting that removing door lock shorting stub directly recovers properly functioning by elevator, the artificial potential safety hazard of ladder is run in enabling to make elevator occur。The design provides solution based on problem above, by hardware modifications measure by the risk reduction of anthropic factor to minimum。

Summary of the invention

Goal of the invention: the invention aims to solve deficiency of the prior art, it is provided that a kind of be greatly improved elevator safety operation and be greatly shortened elevator faults after the elevator door lock loop safety guard of maintenance time。

Technical scheme: a kind of elevator door lock loop safety guard of the present invention; including loop of the door lock; described loop of the door lock is in series with some door interlock switches; it is in series with door lock protector between adjacent two door interlock switches in described loop of the door lock; described door lock protector includes audion; it is connected in series with load between c pole and the b pole of described audion; electric capacity; relay and rectification circuit; one of them load is also connected in parallel to light emitting diode, and the contact switch of described relay is connected in described loop of the door lock。

As optimization, the emitter e end ground connection of described audion。

As optimization, described light emitting diode is electrically connected with loop of the door lock by electric pressure converter。

As optimization, described transistor base b pole is connected with loop of the door lock by load and electric capacity。

Beneficial effect: the present invention is by having improved original loop of the door lock; add door lock protector; thus repair and maintenance personnel can quickly judge the position of failure point of loop of the door lock; can intuitively arrive elevator door electrical wiring situation; and have employed special envelope line mode and stopped because omitting the human accident etc. that wire jumper occurs; substantially increase the reliability of elevator safety operation, also shorten the maintenance time after elevator faults to greatest extent。

Accompanying drawing explanation

Fig. 1 is the elevator door lock loop principle assumption diagram of the present invention。

Fig. 2 is elevator door lock loop principle assumption diagram of the prior art。

Detailed description of the invention

A kind of elevator door lock loop safety guard as shown in Figure 1, including loop of the door lock, loop of the door lock is in series with some door interlock switch (1F, 2F, 3F NF), it is in series with door lock protector (1G between adjacent two door interlock switches in loop of the door lock, 2G, 3G NG), door lock protector includes audion TD, it is connected in series with load R1 between colelctor electrode c pole and the base stage b pole of audion TD, R2 and R3, electric capacity C, relay J and rectification circuit ZL, one of them load also R3 is connected in parallel to light emitting diode HL, the contact switch of relay J is connected in loop of the door lock, the emitter e end ground connection of audion, audion TD base stage b pole is connected with loop of the door lock by load R2 and electric capacity C。

The operation principle of this door lock circuit is:

After NF layer door is closed, this layer of door interlock switch is connected, running voltage U_ACEntering safety device, form base current Ib at audion TD, emitter e ground connection, thus forming loop, when audion is saturated, colelctor electrode b turns on emitter e, and light emitting diode HL lights, relay J coil working, makes the contacting of relay J, and loop of the door lock turns on。When grounded emitter is disconnected, this audion can not work, and relay J coil cannot work, and contact cannot be connected, and erecting device works, and door lock circuit can not form loop, and elevator device would not start elevator。

This loop of the door lock has the advantage that

1) adopt potential difference relative method design principle, door lock protector is connected in loop of the door lock, layer door lock circuit is monitored; when door lock line and earth lead current potential close to time; can determine whether to disconnect or shorted to earth for door lock, now protection device should cut off loop of the door lock, waits reparation to be checked；

2), when there is voltage between door lock and earth lead, available luminous tube is as prompting, and the now above door lock line conduction of this layer, loop of the door lock is normal。Such as certain layer of door lock access failure, this door lock line no-voltage, and without potential difference between earth lead, luminous tube can not be lighted, then this layer of door lock is abnormal；

3) switch board door lock line doing short circuit restriction process, configure Special short plug when dispatching from the factory, this plug, while short circuit door lock line, should disconnect the normal condition circuit of elevator, and now elevator can only manually to overhaul formal operations。

This loop of the door lock is through concatenating a set of safety device for inspection layer door ground state in the loop of the door lock of every layer, so that it is guaranteed that the loop of the door lock of elevator does not have accident in long-play。Simultaneously, this patent adds the prompt facility of light emitting diode in the design, when a certain layer door of elevator is not turned off or layer door ground connection disconnects, this luminous tube does not work, this layer of fault can be investigated by repair and maintenance personnel immediately, and the working method time of more traditional inspection door lock loop shortens more than 85%。

Fig. 2 is elevator door lock loop principle assumption diagram of the prior art。Traditional door lock mode of connection is will to be entered in a series arrangement in control system by the door interlock switch on all elevator doors, and when some switch is not turned on, this series loop can not turn on, and control system would not drive elevator to run。And in actual applications, owing in aging circuit or installation, circuit is impaired, the insulativity of door lock circuit can be made to reduce and even to turn on layer door mechanical component, because the mechanical parts of every layer of door is independently installed, not being connected with other mechanical component, whether ground connection reliably just becomes important preventive means。In conventional experience and lessons, owing to layer door earth lead gets loose or at all unearthed, it may appear that following security incident: 1, when single door lock line is damaged and after the conducting of layer door machinery, this layer of door entirety is charged, brings serious harm to passenger；2, after double joint door lock line is all impaired, circuit constitutes loop by layer door mechanical parts, the substantial risk that under door opening state, elevator runs occurs。

Claims

1. an elevator door lock loop safety guard; it is characterized in that: include loop of the door lock; described loop of the door lock is in series with some door interlock switches; it is in series with door lock protector between adjacent two door interlock switches in described loop of the door lock; described door lock protector includes audion; it is connected in series with some loads, electric capacity, relay and rectification circuit between colelctor electrode c pole and the base stage b pole of described audion; one of them load is also connected in parallel to light emitting diode, and the contact switch of described relay is connected in described loop of the door lock。

2. a kind of elevator door lock loop safety guard according to claim 1, it is characterised in that: the emitter e end ground connection of described audion。

3. a kind of elevator door lock loop safety guard according to claim 1, it is characterised in that: described light emitting diode is electrically connected with loop of the door lock by electric pressure converter。

4. a kind of elevator door lock loop safety guard according to claim 1, it is characterised in that: described transistor base b pole is connected with loop of the door lock by load and electric capacity。