Elevator safety circuit detection device

A safety loop and safety detection technology, applied in the field of elevators, can solve problems such as the decline in elevator reliability

Active Publication Date: 2021-07-30
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

lead to a decrease in the reliability of the elevator

Method used

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  • Elevator safety circuit detection device
  • Elevator safety circuit detection device
  • Elevator safety circuit detection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as image 3 As shown, this embodiment discloses a detection device for an elevator safety circuit, including an elevator safety circuit, the elevator safety circuit includes a first safety detection circuit 10, and the first safety detection circuit 10 includes a first safety switch assembly 11, The first relay circuit 13 and the first control signal.

[0049] The first safety switch assembly 11 includes a first safety switch combination 11.1 and a second safety switch combination 11.2; the first safety switch combination 11.1 is connected in series with the second safety switch combination 11.2.

[0050] The first relay circuit 13 includes a first normally open contact 13.1, a second normally open contact 13.2, a first normally closed contact 13.3, a second normally closed contact 13.4, a first relay coil 13.5, a first normally open contact 13.1 Connect in series with the first safety switch assembly 11 and then in series with the second normally open contact 13.2;...

Embodiment 2

[0061] On the basis of the first embodiment, the first safety switch combination 11.1 is a car door lock switch, and the second safety switch combination 11.2 is a floor door lock switch. Further, there may be multiple floor door lock switches.

[0062] Such as Figure 6 As shown, when the elevator arrives at the landing and opens the door, the car door lock switch and the landing door lock switch in series are disconnected at the same time, and the rear stage of the safety circuit loses voltage. At this time, it is impossible to judge whether the car door lock switch and the floor door lock switch are short-circuited respectively by the voltage of the safety circuit rear stage.

[0063] At this time, whether the car door lock switch and the landing door lock switch are normally off can be judged respectively through the first detection point and the relay.

[0064] When the first control signal controls the first relay coil 13.5 to be disconnected, the current flows as Fi...

Embodiment 3

[0067] On the basis of Embodiment 1, the first safety switch combination 11.1 is a car door lock switch on the front door connected in series with the car door lock switch on the rear door, and the second safety switch combination 11.2 is a door lock switch on the front door and a door lock switch on the rear door The switches are connected in series. Further, there may be multiple floor door lock switches.

[0068] Such as Figure 9 As shown, when the elevator arrives at the landing and opens the door, if the front door opens on this floor, then the method of Embodiment 1 can respectively detect whether the front door car door lock switch and the front door floor door lock switch are short-circuited. If the floor is opened by the rear door, then the method of Embodiment 1 can be used to detect whether the car door lock switch of the rear door and the door lock switch of the rear door floor are short-circuited.

[0069] But if the floor that the elevator arrives is when the ...

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Abstract

The invention discloses an elevator safety loop detection device, which includes the elevator safety loop, and can respectively detect the short circuit of switches through the change of the series sequence of the elevator safety loop. The device does not bypass any electrical switches during the detection process, and the safety circuit is always in an effective state. This device does not remove any electrical switch from the safety circuit during the detection process. During the detection process, if the electrical switch can be reset normally, the safety circuit can be turned on normally.

Description

technical field [0001] The invention relates to the field of elevators, in particular to an elevator safety circuit detection device. Background technique [0002] In the safety circuit of an elevator or escalator, multiple electrical switches are often used in series as a safety circuit to protect the personal safety of passengers and maintenance personnel. For an electrical switch that operates independently, the electrical system can relatively simply detect through the end of the safety circuit, and can determine whether the safety switch is short-circuited. However, for two or more electrical switches that act at the same time, if one of the electrical switches is short-circuited alone, the system cannot detect that a switch is short-circuited through the end of the safety circuit. For example, (1) two hydraulic buffers with the same action position are pressed down at the same time, and the safety switch on each hydraulic buffer operates simultaneously (2) the electri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B1/06B66B5/00
CPCB66B1/06B66B5/0018
Inventor 董德靖
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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