CN209890029U - But elevator lock bypass of lock short circuit test - Google Patents
But elevator lock bypass of lock short circuit test Download PDFInfo
- Publication number
- CN209890029U CN209890029U CN201920342220.0U CN201920342220U CN209890029U CN 209890029 U CN209890029 U CN 209890029U CN 201920342220 U CN201920342220 U CN 201920342220U CN 209890029 U CN209890029 U CN 209890029U
- Authority
- CN
- China
- Prior art keywords
- door lock
- starting
- bypass
- knob
- interface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Elevator Control (AREA)
Abstract
The utility model provides a but elevator door lock bypass of lock short circuit test for after solving elevator bypass and elevator bypass, there is the people for the short circuit and be difficult to the problem that is detected in elevator layer door or sedan-chair door lock return circuit, this elevator door lock bypass includes: the system comprises a bypass module, a bypass starting plug-in, a BPT door lock short circuit detection starting knob and an MCB controller; the bypass module includes a PX receptacle and a PL module that includes a first PL module and a second PL module. The elevator door lock bypass control loop is simple in structure, safe and reliable; whether an external input signal is abnormal is detected through the elevator controller MCB, whether the current running state of the elevator and the car door loop or the landing door loop are artificially short-circuited is judged, the purposes of integrating door lock bypass and door lock short circuit detection are achieved, and the use safety of the elevator is guaranteed.
Description
Technical Field
The utility model relates to an elevator detects technical field, especially relates to an elevator lock bypass of lock short circuit test.
Background
In the maintenance and repair process of the elevator, most elevators have door lock faults, so that the elevator cannot run normally, and the door lock loop can be short-circuited to repair the elevator in the maintenance process.
The short circuit of the door lock loop is inevitable during elevator maintenance, and a large number of casualty accidents can be caused by the short circuit of the door lock loop; in order to reduce the risk of casualty accidents, several methods are used.
(1) Flags and alarms . That is, the word "bypass" is indicated on or near the elevator landing doors and car door bypass devices and indicates the "bypass" state or "off" state of the bypass device; most elevator companies have set flags and alarms , but these methods are not practical.
(2) Systems without bypasses are designed. This is not possible to perform because to find the correct position of the faulty contact of the door lock, it is necessary to bypass this contact in order to move the car to that position.
(3) Avoid forgetting the short circuit. This only reduces the possibility of forgetting, but cannot really avoid forgetting. For example, some elevator companies assign a special short-circuit wire with a number to each elevator maintenance person, and require the elevator maintenance person to check whether the elevator maintenance person forgets after each maintenance is finished, and check each day after the operation by the station length, so that potential safety hazards are reduced, and a good effect is obtained. However, the measures can only partially solve the problems of forgetting the short-circuit wire of the door lock and checking responsibility after the accident, belong to measures for enhancing responsibility of elevator maintenance personnel, and cannot fundamentally solve the potential safety hazard of short-circuit of the door lock loop during maintenance.
In order to solve the above problems, in the prior art, a corresponding door lock bypass is also provided to prevent a car door and a landing door from being short-circuited at the same time, and to improve the safety of elevator maintenance personnel in the maintenance process, for example, chinese patent publication No. CN206427903U discloses an elevator door lock bypass device, which includes: bypass module, the entrance hall bypass instructs the flat tube, layer door bypass short circuit terminal, bypass safety apron, a serial communication port, under the elevator is normal operating mode, bypass module inserts in urgent electronic bypass short circuit terminal, the light source that plane tube was instructed to urgent electronic bypass is the green, and be in hidden state to layer door bypass short circuit terminal and sedan-chair door bypass short circuit terminal through the apron on the bypass module under, adopt this elevator lock bypass device, can prevent sedan-chair door layer door short circuit simultaneously, the security in the maintenance process has been improved.
However, the elevator door lock bypass device in the prior art can only avoid the risk in the elevator bypass process, and cannot avoid the problem that the elevator maintenance personnel forget to disconnect the short circuit loop after completing maintenance.
Therefore, in order to ensure the safe use of the elevator and avoid safety accidents caused by door lock short circuit, an elevator door lock bypass capable of testing the door lock short circuit needs to be designed to solve the problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a solution elevator maintenance personal forget the disconnection shorting stub after carrying out the elevator lock maintenance and arouse the elevator lock bypass of the lock short circuit test that whether there is the artificial short circuit in the detection lock contact fast effectual.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an elevator door lock bypass capable of door lock short circuit testing, comprising: the system comprises a bypass module, a bypass starting plug-in, a BPT door lock short circuit detection starting knob and an MCB controller;
the bypass module comprises a PX socket and a PL module, the PL module comprises a first PL module and a second PL module, the PX socket comprises a first jack 1, a second jack 2, a third jack 3 and a fourth jack 4; the first PL module comprises a PL interface 1, a PL interface 2, a PL interface 3 and a PL interface 4, and the second PL module comprises a PL interface 2, a PL interface 3, a PL interface 4 and a PL interface 5;
the bypass starting plug-in comprises a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4;
the BPT door lock short circuit detection starting knob comprises a first knob, a second knob and a third knob;
the MCB controller includes a first test port X1, a second test port X2, a third test port X3, a fourth test port X4, and a fifth test port X5.
Further, the air conditioner is provided with a fan,
when the elevator is in a preset normal working mode, a first starting jack 1, a second starting jack 2, a third starting jack 3 and a fourth starting jack 4 of a bypass starting plug-in are correspondingly inserted into a first jack 1, a second jack 2, a third jack 3 and a fourth jack 4 of a PX socket of a bypass module, the first jack 1 of the PX socket of the bypass module is connected with a preset power supply voltage, the second jack 2 and the third jack 3 of the PX socket of the bypass module are respectively connected with a fourth detection port X4 and a third detection port X3 of the MCB controller, and the fourth jack 4 of the PX socket is connected with a preset emergency electric power; the BPT door lock short circuit detection starting knob is arranged at a preset normal position, one end of a first knob of the BPT door lock short circuit detection starting knob is connected with a preset power supply voltage, and the other end of the first knob of the BPT door lock short circuit detection starting knob is connected with a fifth detection port X5 of the MCB controller.
Further, the air conditioner is provided with a fan,
when the elevator is in a preset car door bypass, a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4 of a bypass starting plug-in are correspondingly inserted into a PL interface 1, a PL interface 2, a PL interface 3 and a PL interface 4 of a first PL module of a bypass module, the PL interface 1 is connected with one end of a second knob of a BPT door lock short circuit detection starting knob, the PL interface 2 is connected with one end of a layer door lock, the other end of the layer door lock is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 3 is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 4 is connected with a first detection port X1 of an MCB controller, the other end of the second knob of the BPT door lock short circuit detection starting knob is connected with the PL interface 3, the other end of the third knob of the BPT door lock short circuit detection starting knob is connected with one end of the MCB door lock and a second detection port X, the other end of the car door lock is connected with a first detection port X1 of the MCB controller, and the PL interface 2 is connected with the door lock voltage.
Further, the air conditioner is provided with a fan,
when the elevator is in a preset landing door bypass, a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4 of a bypass starting plug-in are correspondingly inserted into a PL interface 2, a PL interface 3, a PL interface 4 and a PL interface 5 of a second PL module of a bypass module, the PL interface 2 is connected with one end of a landing door lock, the other end of the landing door lock is connected with one end of a third knob of a BPT door lock short circuit detection starting knob, the PL interface 3 is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 4 is connected with a first detection port X1 of an MCB controller, the other end of a second knob of the BPT door lock short circuit detection starting knob is connected with the PL interface 3, the other end of a third knob of the BPT door lock short circuit detection starting knob is connected with one end of a door lock and a second detection port X2 of the MCB controller, and the other end of the MCB door lock is connected with a first detection port X1, PL interface 2 interfaces the latch voltage.
The utility model has the advantages that:
(1) firstly, whether the current elevator is in a preset normal operation state or in a preset emergency electric/short circuit detection operation mode is determined by judging the connection relation between the current bypass module and the bypass starting plug-in, the button position of the door lock short circuit test starting button and whether a preset input signal is received by a preset detection port of the controller, so that quick, simple, reliable and safe elevator operation mode judgment is provided for elevator maintenance personnel.
(2) This application starts the relation of connection between the plug-in components and the first default detection port of controller through bypass module's first PL module and the bypass and whether receives to predetermine preset input signal and confirm whether the elevator is in sedan-chair door bypass state, provides the judgement of simple directness, reliable safe elevator sedan-chair door bypass for elevator maintenance personnel.
(3) This application starts the relation of connection between the plug-in components through bypass module's second PL module and bypass and whether the second of controller is predetermine the detection port and is received and predetermine preset input signal and confirm whether the elevator is in layer door bypass state, provides the judgement of simple directness, reliable safe elevator layer door bypass for elevator maintenance personal.
(4) The elevator door lock bypass control loop is simple in structure, safe and reliable; whether an external input signal is abnormal is detected through the elevator controller MCB, whether the current running state of the elevator and the car door loop or the landing door loop are artificially short-circuited is judged, the purposes of integrating door lock bypass and door lock short circuit detection are achieved, and the use safety of the elevator is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of an elevator door lock bypass capable of performing door lock short circuit test.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Examples
This embodiment provides an elevator lock bypass of but lock short circuit test, as shown in fig. 1, this bypass includes:
the system comprises a bypass module, a bypass starting plug-in, a BPT door lock short circuit detection starting knob and an MCB controller;
the bypass module comprises a PX socket and a PL module, the PL module comprises a first PL module and a second PL module, the PX socket comprises a first jack 1, a second jack 2, a third jack 3 and a fourth jack 4; the first PL module comprises a PL interface 1, a PL interface 2, a PL interface 3 and a PL interface 4, and the second PL module comprises a PL interface 2, a PL interface 3, a PL interface 4 and a PL interface 5;
the bypass starting plug-in comprises a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4;
the BPT door lock short circuit detection starting knob comprises a first knob, a second knob and a third knob;
the MCB controller includes a first test port X1, a second test port X2, a third test port X3, a fourth test port X4, and a fifth test port X5.
Further, the air conditioner is provided with a fan,
when the elevator is in a preset normal working mode, a first starting jack 1, a second starting jack 2, a third starting jack 3 and a fourth starting jack 4 of a bypass starting plug-in are correspondingly inserted into a first jack 1, a second jack 2, a third jack 3 and a fourth jack 4 of a PX socket of a bypass module, the first jack 1 of the PX socket of the bypass module is connected with a preset power supply voltage, the second jack 2 and the third jack 3 of the PX socket of the bypass module are respectively connected with a fourth detection port X4 and a third detection port X3 of the MCB controller, and the fourth jack 4 of the PX socket is connected with a preset emergency electric power; the BPT door lock short circuit detection starting knob is arranged at a preset normal position, one end of a first knob of the BPT door lock short circuit detection starting knob is connected with a preset power supply voltage, and the other end of the first knob of the BPT door lock short circuit detection starting knob is connected with a fifth detection port X5 of the MCB controller.
When the elevator is in a preset normal working mode, the bypass starting plug-in acts on a PX socket of the bypass module, the door lock short circuit detection starting knob is in a preset normal position, and when electricity is supplied, a preset input signal exists at the third detection port X3, the fourth detection port X4 and the fifth detection port X5 of the MCB controller.
Therefore, the current state of the elevator can be judged by detecting whether the third detection port X3, the fourth detection port X4 and the fifth detection port X5 of the MCB controller have preset input signals in the circuit connection mode; if the third detection port X3, the fourth detection port X4 and the fifth detection port X5 of the MCB controller have preset input signals, the current state of the elevator is a preset normal working mode state, and if the third detection port X3, the fourth detection port X4 and the fifth detection port X5 of the MCB controller do not have preset input signals, the elevator is forcibly controlled to enter an emergency electric operation mode or a car door lock short circuit detection mode.
Further, the air conditioner is provided with a fan,
when the elevator is in a preset car door bypass, a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4 of a bypass starting plug-in are correspondingly inserted into a PL interface 1, a PL interface 2, a PL interface 3 and a PL interface 4 of a first PL module of a bypass module, the PL interface 1 is connected with one end of a second knob of a BPT door lock short circuit detection starting knob, the PL interface 2 is connected with one end of a layer door lock, the other end of the layer door lock is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 3 is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 4 is connected with a first detection port X1 of an MCB controller, the other end of the second knob of the BPT door lock short circuit detection starting knob is connected with the PL interface 3, the other end of the third knob of the BPT door lock short circuit detection starting knob is connected with one end of the MCB door lock and a second detection port X, the other end of the car door lock is connected with a first detection port X1 of the MCB controller, and the PL interface 2 is connected with the door lock voltage.
Under the circuit connection mode, the elevator is in a car door bypass mode, and at the moment, whether a preset input signal exists on a first detection port X1 of the MCB or not can be detected to judge that the current elevator has a car door lock bypass.
Further, the air conditioner is provided with a fan,
when the elevator is in a preset landing door bypass, a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4 of a bypass starting plug-in are correspondingly inserted into a PL interface 2, a PL interface 3, a PL interface 4 and a PL interface 5 of a second PL module of a bypass module, the PL interface 2 is connected with one end of a landing door lock, the other end of the landing door lock is connected with one end of a third knob of a BPT door lock short circuit detection starting knob, the PL interface 3 is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 4 is connected with a first detection port X1 of an MCB controller, the other end of a second knob of the BPT door lock short circuit detection starting knob is connected with the PL interface 3, the other end of a third knob of the BPT door lock short circuit detection starting knob is connected with one end of a door lock and a second detection port X2 of the MCB controller, and the other end of the MCB door lock is connected with a first detection port X1, PL interface 2 interfaces the latch voltage. Under the normal automatic operation mode of the elevator, the bypass starting plug-in (PX-1) acts on a preset socket (PX) socket of the bypass module, the door lock short circuit test starting button is arranged at a normal position, at the moment, an input signal is provided for a third preset detection port X3, a fourth preset detection port X4 and a fifth preset detection port X5 of the controller (MCB), and otherwise, the elevator is controlled to forcibly enter an emergency electric operation mode or a car door lock short circuit detection mode.
When the layer door is bypassed, the bypass enable plug-in (PX-1) is connected with the second PL module of the bypass module, and the second preset detection port X2 on the controller (MCB) has an input signal. At this time, whether the current elevator has a landing door lock bypass can be judged by detecting whether a preset input signal is on the second detection port X2 of the MCB.
When the short circuit of the door lock loop of the landing door is detected, the elevator needs to be in a flat-landing door opening standby state; when the controller (MCB) detects that the X2 still has an input signal, the system considers that the landing door loop has an artificial short circuit phenomenon, and the system reports an error and prohibits the elevator from being used.
When the short circuit of the car door lock loop is detected, the elevator needs to be in a flat-layer door opening standby state; at this time, the bypass starting plug-in (PX-1) is connected with the first PL module of the bypass module, and at this time, the first preset detection port X1 and the second preset detection port X2 on the controller (MCB) have input signals; then the door lock short circuit test starting button is positioned at a door lock short circuit detection function position, the controller (MCB) cuts off an input signal of a fifth preset detection port X5, and the system automatically enters a door lock short circuit detection function; when the controller (MCB) still detects that the X2 still has an input signal, the system considers that the car door lock loop has an artificial short circuit phenomenon, and the system reports errors and prohibits the elevator from being used.
By adopting the elevator door lock bypass, whether an external preset input signal is abnormal or not can be detected through a controller (MCB), and whether the elevator is in a preset normal running state or not can be further judged. Adopt this system, can satisfy the effect of bypass lock, the signal input condition of predetermineeing of a plurality of detection ports of predetermineeing of accessible controller again detects the lock short circuit, plays the effect that lock bypass and lock short circuit detected, has guaranteed the security that the elevator used.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (4)
1. An elevator door lock bypass capable of being tested by door lock short circuit is characterized by comprising: the system comprises a bypass module, a bypass starting plug-in, a BPT door lock short circuit detection starting knob and an MCB controller;
the bypass module comprises a PX socket and a PL module, the PL module comprises a first PL module and a second PL module, the PX socket comprises a first jack 1, a second jack 2, a third jack 3 and a fourth jack 4; the first PL module comprises a PL interface 1, a PL interface 2, a PL interface 3 and a PL interface 4, and the second PL module comprises a PL interface 2, a PL interface 3, a PL interface 4 and a PL interface 5;
the bypass starting plug-in comprises a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4;
the BPT door lock short circuit detection starting knob comprises a first knob, a second knob and a third knob;
the MCB controller includes a first test port X1, a second test port X2, a third test port X3, a fourth test port X4, and a fifth test port X5.
2. The elevator door lock bypass capable of door lock short circuit test according to claim 1,
when the elevator is in a preset normal working mode, a first starting jack 1, a second starting jack 2, a third starting jack 3 and a fourth starting jack 4 of a bypass starting plug-in are correspondingly inserted into a first jack 1, a second jack 2, a third jack 3 and a fourth jack 4 of a PX socket of a bypass module, the first jack 1 of the PX socket of the bypass module is connected with a preset power supply voltage, the second jack 2 and the third jack 3 of the PX socket of the bypass module are respectively connected with a fourth detection port X4 and a third detection port X3 of the MCB controller, and the fourth jack 4 of the PX socket is connected with a preset emergency electric power; the BPT door lock short circuit detection starting knob is arranged at a preset normal position, one end of a first knob of the BPT door lock short circuit detection starting knob is connected with a preset power supply voltage, and the other end of the first knob of the BPT door lock short circuit detection starting knob is connected with a fifth detection port X5 of the MCB controller.
3. The elevator door lock bypass capable of door lock short circuit test according to claim 1,
when the elevator is in a preset car door bypass, a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4 of a bypass starting plug-in are correspondingly inserted into a PL interface 1, a PL interface 2, a PL interface 3 and a PL interface 4 of a first PL module of a bypass module, the PL interface 1 is connected with one end of a second knob of a BPT door lock short circuit detection starting knob, the PL interface 2 is connected with one end of a layer door lock, the other end of the layer door lock is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 3 is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 4 is connected with a first detection port X1 of an MCB controller, the other end of the second knob of the BPT door lock short circuit detection starting knob is connected with the PL interface 3, the other end of the third knob of the BPT door lock short circuit detection starting knob is connected with one end of the MCB door lock and a second detection port X, the other end of the car door lock is connected with a first detection port X1 of the MCB controller, and the PL interface 2 is connected with the door lock voltage.
4. The elevator door lock bypass capable of door lock short circuit test according to claim 1,
when the elevator is in a preset landing door bypass, a first starting socket 1, a second starting socket 2, a third starting socket 3 and a fourth starting socket 4 of a bypass starting plug-in are correspondingly inserted into a PL interface 2, a PL interface 3, a PL interface 4 and a PL interface 5 of a second PL module of a bypass module, the PL interface 2 is connected with one end of a landing door lock, the other end of the landing door lock is connected with one end of a third knob of a BPT door lock short circuit detection starting knob, the PL interface 3 is connected with one end of a third knob of the BPT door lock short circuit detection starting knob, the PL interface 4 is connected with a first detection port X1 of an MCB controller, the other end of a second knob of the BPT door lock short circuit detection starting knob is connected with the PL interface 3, the other end of a third knob of the BPT door lock short circuit detection starting knob is connected with one end of a door lock and a second detection port X2 of the MCB controller, and the other end of the MCB door lock is connected with a first detection port X1, PL interface 2 interfaces the latch voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920342220.0U CN209890029U (en) | 2019-03-18 | 2019-03-18 | But elevator lock bypass of lock short circuit test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920342220.0U CN209890029U (en) | 2019-03-18 | 2019-03-18 | But elevator lock bypass of lock short circuit test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209890029U true CN209890029U (en) | 2020-01-03 |
Family
ID=69017539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920342220.0U Active CN209890029U (en) | 2019-03-18 | 2019-03-18 | But elevator lock bypass of lock short circuit test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209890029U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113460838A (en) * | 2020-03-31 | 2021-10-01 | 苏州汇川技术有限公司 | Door lock bypass control method and system, electronic safety controller and main controller |
-
2019
- 2019-03-18 CN CN201920342220.0U patent/CN209890029U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113460838A (en) * | 2020-03-31 | 2021-10-01 | 苏州汇川技术有限公司 | Door lock bypass control method and system, electronic safety controller and main controller |
| CN113460838B (en) * | 2020-03-31 | 2023-10-10 | 苏州汇川技术有限公司 | Door lock bypass control method and system, electronic safety controller and main controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108394775B (en) | Elevator safety system and safety control method | |
| CN106744201B (en) | For elevator door, the shunting device of gate and method | |
| CN109896383B (en) | Elevator fault diagnosis method, device, equipment and computer storage medium | |
| CN105668374B (en) | A kind of elevator faults security escape system | |
| CN103523642B (en) | A kind of quick short circuit system of door lock of elevator and short circuit method | |
| CN110065863B (en) | Door lock short circuit detection control method and system based on elevator door lock bypass | |
| CN108328446B (en) | Elevator door loop detection device | |
| CN209890029U (en) | But elevator lock bypass of lock short circuit test | |
| CN111453569A (en) | Tester and system for elevator car accidental movement protection device | |
| CN110482355A (en) | A kind of door lock of elevator detection circuit and device | |
| CN209685084U (en) | A kind of elevator car safety and elevator | |
| CN2324133Y (en) | Elevator trouble detection and saving apparatus | |
| CN111983396A (en) | Electric high-voltage test area safety protection system | |
| CN206705428U (en) | A kind of elevator safety loop detects circuit | |
| CN205527115U (en) | Unilateral stopper test control board | |
| CN201857191U (en) | Short circuit preventing system for elevator door lock | |
| CN108249248A (en) | A kind of lift rescue device | |
| CN108919781A (en) | The self checking method and realization circuit of EMU auto-passing neutral section control system | |
| CN212608865U (en) | Tester and system for elevator car accidental movement protection device | |
| CN208922360U (en) | A kind of security mask accelerator control system | |
| CN206218984U (en) | A kind of elevator door lock safety return circuit apparatus for examination and repair | |
| CN208218119U (en) | Elevator door loop detector | |
| CN204823542U (en) | Electrified terraced room lock detects elevator display panel of function and lock return circuit of adopting it | |
| CN211496491U (en) | Short circuit protection system for elevator safety loop and application terminal thereof | |
| CN214003751U (en) | Elevator door lock safety loop and elevator comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |