CN201761988U

CN201761988U - Elevator safety circuit adopting non-contact door lock switch

Info

Publication number: CN201761988U
Application number: CN2010205090660U
Authority: CN
Inventors: 赵震; 吴海波; 蔡状
Original assignee: Dongnan Elevator Co Ltd
Current assignee: Dongnan Elevator Co Ltd
Priority date: 2010-08-28
Filing date: 2010-08-28
Publication date: 2011-03-16
Anticipated expiration: 2020-08-28

Abstract

The utility model discloses an elevator safety circuit adopting a non-contact door lock switch, which comprises a door lock power supply, a main contactor, a main controller, a safety circuit module, a junction box and each door lock switch. The elevator safety circuit is characterized in that: each door lock switch is composed of a magnetic sensitive element with two groups of independent normally-open contacts and a magnet; the two groups of independent contacts A1 and A2 of each door lock switch are connected into two input channels of the safety circuit module after being respectively and sequentially connected in series in a corresponding manner; two groups of safety contact signals output by the safety circuit module after carrying out redundancy judging are respectively connected into the input end and the output end of the main controller of an elevator; and a short-circuit and ground protection circuit is arranged at the inner part of the safety circuit module. As the elevator safety circuit adopts the non-contact operating mode, the on-off of each door lock switch acts through a magnetic field without mutual contact, so as to solve the problems that a traditional switch can be easily abraded due to contact and can be easily oxidized due to fire fighting when in use, thereby improving the durability of each door lock switch and the safety of the elevator.

Description

A kind of elevator safety circuit that adopts contactless door switch

Technical field the utility model relates to the door lock vital circuit that is used for elevator, adopts contactless door switch to substitute traditional contact mechanical contact type door switch, is particularly useful for the elevator that uses under the particular surroundingss such as requirement is dustproof, waterproof, corrosion prevention.

The door lock vital circuit common form of the present elevator of background technology has two kinds, respectively as depicted in figs. 1 and 2.Mainly by power supply PWR, each layer by layer parts such as door and car door lock switch SW 1/SW2/SW3/....../SWn/SWC, door lock relay K AD, elevator main controller APCM, operation main contactor KMY form.Such circuit is from door lock power supply one end, through each door and after the car door lock switch connects successively layer by layer, insert door lock relay coil one side (or directly insert elevator main controller and detect), the opposite side of door lock relay coil is received the door lock power tip and is finished.Groundwork is that the contact access elevator main controller input end of door lock relay detects, when having only all door switcies all closed, the adhesive of door lock relay coil, the closing of contact, elevator main controller detects the door lock path, judges with this that elevator door is in and closes locking state; As long as arbitrary door switch disconnects, the door lock relay coil discharges, contact open, and elevator main controller detects and is the door lock open circuit, judges that elevator door is in open mode.

The door switch that generally adopts in the industry all is a kind of straight cutting contact contact switch with metal short circuit sheet at present.Form by two parts: the contact of band metal short circuit sheet and the switch pedestal of contact-carrying.These two parts are installed in respectively on the corresponding position of each door leaf, by moving of door leaf or moving of latch hook, make contact and contact when door is closed or locked, to be in contact with one another, make switch closure, and both can force to separate when door is opened, and switch is disconnected.But the contact of this switch or contact generally all expose, and degree of protection is very low, and what have has only IP20, do not possess dustproof, waterproof, anti-corrosion performance.So more abominable places of operating mode such as that the class door switch is not suitable for is outdoor, oil, chemical industry, mine.

Simultaneously, the door lock vital circuit is owing to be subjected to the influence of story height, and the door lock circuit of high rise elevator is often very tediously long, can cause the pressure drop of circuit bigger like this, may cause reliably adhesive of contactless switch, generally alleviate by the mode that improves door lock circuit voltage and the wiring of optimization door lock circuit.The door switch of this contact wearing and tearing easily in daily use in addition, because the power supply of general door lock vital circuit is 110V or 220V, this moment, door switch caused the contact premature oxidation because of sparking easily when disjunction, not only there is bad contact, and increased maintenance personnel's labour intensity.

The summary of the invention the purpose of this utility model is the deficiency that overcomes prior art, and a kind of elevator safety circuit that adopts contactless door switch is provided.Particular surroundingss such as that this vital circuit can adapt to is outdoor, oil, chemical industry, mine, possess performances such as good dustproof, waterproof, corrosion prevention, reach high durable and sludgeproof technical requirements simultaneously, with the reliability service of the elevator that guarantees under all kinds of particular surroundingss such as outdoor, oil, chemical industry, mine, to work.

The purpose of this utility model is to adopt following technical scheme to realize:

A kind of elevator safety circuit that adopts contactless door switch, it comprises the door lock power supply, main contactor, master controller, the vital circuit module, connection box and each door switch, it is characterized in that: described each door switch is made up of equal magneto sensor and magnet two parts with two groups of independence open contacts, two groups of independent contact A1 of each door switch and A2 are after correspondence is connected successively respectively, be linked into two input channels of vital circuit module, two groups of safety contact signals that this vital circuit module carries out exporting after the redundancy determination insert the input end and the mouth of elevator main controller respectively; The inside of vital circuit module also disposes short circuit and ground protection circuit.

The shell of described each door switch all adopts high fiber thermoplastic insulating material to make, integral sealing, its inner two groups independently open contact directly draw by cable.

The elevator safety circuit of the contactless door switch of employing that the utility model provides, degree of protection reaches IP67, dustproof, waterproof, anti-corrosion good effect have not only been reached, elevator can be under particular surroundingss such as outdoor, oil, chemical industry, mine smooth operation, and, the durability of door switch and the safety of elevator have also been improved because of having adopted contactless operating mode.The break-make of door switch does not need to be in contact with one another by the magnetic field effect, substitute traditional straight cutting contact mechanical contact with it, with solve conventional switch in use easy to wear because of contact, because of the easy problem of oxidation of sparking, improve the durability of door switch and the safety of elevator.

Description of drawings Fig. 1 is existing a kind of door lock of elevator vital circuit principle schematic;

Fig. 2 is existing another kind of door lock of elevator vital circuit principle schematic;

Fig. 3 is a door lock vital circuit principle schematic of the present utility model.

The specific embodiment is further described the specific embodiment of the present invention below in conjunction with drawings and Examples:

As shown in Figure 3, the utility model adopts the elevator safety circuit of contactless door switch, it mainly comprises by JBK series door lock power supply PWR, LC1 series main contactor KMY, DNS series master controller APCM, the vital circuit module SCR that contains electronic component, BX1 series connection box TB1/TB2/TB3/....../TBn and each the door switch SM1/SM2/SM3/....../SMn of degree of protection IP67, each door switch SM1/SM2/SM3/....../SMn forms by magneto sensor and magnet two parts with two groups of independence open contacts, what adopt is German Shi Maisai BNS series switch, its shell all adopts high fiber thermoplastic insulating material to make, integral sealing, inner two groups independently the contact directly lead to connection box TBn by cable, degree of protection reaches IP67, satisfies dustproof, waterproof, requirements such as corrosion prevention; The two groups of independent contact A1 of each door switch SM1/SM2/SM3/....../SMn and A2 be after correspondence is connected successively respectively, is linked into two passage input side IN1 and the IN2 of the vital circuit module SCR that contains electronic component; Vital circuit module SCR has the output of two-way relay contact formula, the contact on each road all is the back output that is together in series of the contact by 3 safety relaies, and two groups of safety contact signal OUT1 that vital circuit module SCR carries out exporting after the redundancy determination and OUT2 insert input side INS and the outgoing side OUT of elevator main controller APCM respectively; In addition, the inside of vital circuit module SCR also disposes short circuit and ground protection circuit, in case the fault of node generation shorted to earth is arranged in the door lock vital circuit, this vital circuit module can play protective effect immediately, satisfies the elevator request of national standard.

Elevator all when closed, have only when A1 and the input of A2 two class contacts are all closed, vital circuit module SCR just can export two-way safety contact signal, is respectively applied for the circuit that drives elevator operation contactless switch KMY and the testing circuit of elevator main controller APCM; When the arbitrary door of elevator was opened, as long as A1 or A2 class contact have one the tunnel to disconnect, vital circuit module SCR can close output immediately, cuts off the door lock of elevator loop; If the situation of A1 or the contact adhesion of A2 class has taken place, then vital circuit module SCR closes output, and can not reset, and can not export next time yet, thereby has guaranteed the safety of door lock of elevator electric circuit inspection.

If the situation of shorted to earth has taken place for A1 or importation, A2 class contact, short circuit that inside disposed and the ground protection circuit of vital circuit module SCR can detect short circuit information, and cut off output, guarantee safety.

Claims

1. elevator safety circuit that adopts contactless door switch, it comprises the door lock power supply, main contactor, master controller, the vital circuit module, connection box and each door switch, it is characterized in that: described each door switch is made up of equal magneto sensor and magnet two parts with two groups of independence open contacts, two groups of independent contact A1 of each door switch and A2 are after correspondence is connected successively respectively, be linked into two input channels of vital circuit module, two groups of safety contact signals that this vital circuit module carries out exporting after the redundancy determination insert the input end and the mouth of elevator main controller respectively; The inside of vital circuit module also disposes short circuit and ground protection circuit.

2. the elevator safety circuit of the contactless door switch of employing according to claim 1, it is characterized in that: the shell of described each door switch all adopts high fiber thermoplastic insulating material to make, integral sealing, its inner two groups independently open contact directly draw by cable.