CN107140496A - Vertical lift pit overhaul resetting means - Google Patents
Vertical lift pit overhaul resetting means Download PDFInfo
- Publication number
- CN107140496A CN107140496A CN201710433117.2A CN201710433117A CN107140496A CN 107140496 A CN107140496 A CN 107140496A CN 201710433117 A CN201710433117 A CN 201710433117A CN 107140496 A CN107140496 A CN 107140496A
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- CN
- China
- Prior art keywords
- switch
- elevator
- resetting means
- controlling switch
- vertical lift
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a kind of vertical lift pit overhaul resetting means, including supply unit, communication device, safety device, pit overhaul resetting means, warning device and control device；Control device, is electrically connected with, the action for controlling warning device with warning device, and when elevator is in normal condition and during not in bottommost floor, if safety device detects the elevator bottom, door is in open mode, starts warning device；Normal condition can be in and not in lowest floor in elevator using the vertical lift pit overhaul resetting means of said structure, when attendant forgets action pit overhaul reset switch and directly opens lowermost layer door into pit operation apparatus for examination and repair, alarm signal is provided, to remind attendant to forget to act pit overhaul resetting means, it is ensured that it is safe and can correctly operate pit overhaul.
Description
Technical field
The present invention relates to elevator reparing technical field, more particularly to a kind of be avoided that hanging down for potential safety hazard is brought to maintenance man
Straight elevator pit maintenance resetting means.
Background technology
During elevator maintenance, overhauling elevator operation is common mode of operation during elevator maintenance.When need behaviour
When making pit overhaul switch, it is necessary to act pit overhaul reset switch first to ensure that attendant enters pit from lowermost layer door
When life safety and can correctly operate pit overhaul.But present elevator does not remind also maintenance personal to be advised according to operation
Journey first operates pit service switch before pit is entered so that elevator is in inspecting state, if attendant forgets to act pit
Reset switch is overhauled, when directly opening elevator bottom door into pit operation apparatus for examination and repair, safety can be brought to attendant
Hidden danger.
The content of the invention
It is an object of the invention to provide a kind of vertical lift pit overhaul resetting means, enter elevator in elevator service personnel
Alarm is sent when not resetting elevator according to operational procedure before pit, reminds maintenance personal to act elevator reset switch in time, from
And to overcome the shortcomings of above-mentioned technical problem.
To achieve these goals, the invention discloses a kind of vertical lift pit overhaul resetting means, including power supply dress
Put, communication device, safety device, pit overhaul resetting means, alarm device and control device；
The supply unit, for providing dc source for the communication device, alarm device and the control device；
The communication device, is electrically connected with elevator main control board and the alarm device, for monitoring the elevator respectively
Running status and residing floor；
The safety device, the folding condition for detecting elevator bottom door；
The pit overhaul resetting means, including reset circuit and the control reset circuit for being resetted to elevator
Reset switch；
The control device, is electrically connected with, the action for controlling the warning device, when described with the alarm device
Elevator is cut not in bottommost floor in normal condition, if the safety device detects the elevator bottom, door is in open shape
State, starts warning device.
Compared with prior art, it is controlled by setting the invention discloses a kind of vertical lift pit overhaul resetting means
Alarm device, normal condition can be in elevator and during not in lowest floor, attendant forgets that action pit overhaul resets
Switch and directly open elevator lowermost layer door and enter when pit operates apparatus for examination and repair there is provided alarm signal, to remind attendant
Pit overhaul reset switch is acted in time, it is ensured that it is safe and can correctly operate pit overhaul, because alarm device is communicated
The control of device and safety device, in the state of elevator does not have potential safety hazard, warning device will not false alarm.
It is preferred that the safety device include door interlock switch, the door interlock switch be connected in series in the control device and
Between the reset switch, follow elevator bottom door folding and folding.
It is preferred that the reset switch includes the switching point position of four groups of independence, it is first switch point position, second switch respectively
Point position, the 3rd switching point position and the 4th switching point position, the reset switch pass through the 3rd switching point position and the 4th switching point
Position is electrically connected with the reset circuit, easy to operate, reduces the probability of control by mistake.
It is preferred that the control device includes the first controlling switch being connected in series with the warning device and the second control
Switch；First controlling switch is open type controlling switch, is acted according to the output signal of the communication device；It is described
Second controlling switch is closed type controlling switch, is acted according to the action of the reset switch and the door interlock switch.
It is preferred that the control device also includes the first relay of control first controlling switch, described first
One power end of relay is connected with the negative pole of the supply unit, and another power end of the relay passes through an electronic switch
It is electrically connected with, the electronic switch is electrically connected with the communication device, is filled by the communication with the positive pole of the supply unit
The control put.
It is preferred that the control device also includes the second relay of control second controlling switch, described second
The negative pole of one power end of relay and the supply unit is electrically connected with, another power end of second relay respectively with
The first switch point position of the reset switch and one end of second switch point position are electrically connected with, the first switch point
The other end of position is electrically connected with the positive pole of the supply unit, and the other end of the second switch point position is opened by the door lock
The positive pole closed with the supply unit is electrically connected with, and the first switch point position is open type, and the second switch point position is normal
Closed form.
It is preferred that the control device also includes one and the second switch point bit serial, in parallel with the door interlock switch
The 3rd controlling switch, the 3rd controlling switch controlled by first relay, is closed type switch, should by setting
3rd controlling switch, to avoid in the case of without potential safety hazard, if the false alarm that the first controlling switch short circuit is caused.
It is preferred that the communication device includes MODBUS communication modules.
It is preferred that the supply unit is the Switching Power Supply of the elevator, without extra increase power supply, cost is saved.
The invention also discloses another exemplary vertical lift pit overhaul resetting means, including it is communication device, multiple
Position device, warning device and control device；
The communication device, is electrically connected with elevator main control board and the control device, for according to the elevator respectively
Running status and residing floor control the action of the control device；
Institute's resetting means, including reset circuit and the reset switch of the control reset circuit for being resetted to elevator；
The control device, is electrically connected with, the action for controlling the warning device, when described with the warning device
Elevator is in normal condition and not in bottommost floor, if elevator bottom door is in open mode, starts alarm dress
Put.
Compared with prior art, it is controlled by setting the invention discloses a kind of vertical lift pit overhaul resetting means
Alarm device, normal condition can be in elevator and during not in lowest floor, attendant forgets that action pit overhaul resets
Switch and directly open elevator lowermost layer door and enter when pit operates apparatus for examination and repair there is provided alarm signal, to remind attendant
Pit overhaul reset switch is acted in time, it is ensured that it is safe and can correctly operate pit overhaul, because alarm device is communicated
The control of device and elevator bottom door folding condition, in the state of elevator does not have potential safety hazard, alarm device will not be missed
Alarm.
It is preferred that the control device includes the first controlling switch being connected in series with the warning device and the second control
Switch；First controlling switch is open type controlling switch, when elevator is in normal condition and during not in the bottom, described the
One controlling switch is closed；Second controlling switch is closed type controlling switch, when elevator bottom door is closed or reset switch
During action, the second controlling switch is opened.
It is preferred that the control device also includes the first relay of control first controlling switch.
It is preferred that the control device also includes the second relay of control second controlling switch.
It is preferred that the communication device is MODBUS communication modules.
The invention also discloses another exemplary vertical lift pit overhaul resetting means, including alarm device, when
When the elevator bottom door is in open mode, if the elevator is in normal condition, cut not in bottommost floor, the police
Reporting device sends alarm.
Compared with prior art, vertical lift pit overhaul resetting means disclosed by the invention, the controlled police by setting
Reporting device, can be in normal condition and during not in lowest floor, attendant forgets to act pit overhaul reset switch in elevator
And directly open elevator lowermost layer door and enter when pit operates apparatus for examination and repair there is provided alarm signal, do not alarm in the case of other, with
Attendant is reminded to act pit overhaul reset switch in time, it is ensured that it is safe and can correctly operate pit overhaul, Er Qie
There is no do not occur false alarm in the case of potential safety hazard.
It is preferred that also including the control device for controlling the warning device, the control device includes filling with the alarm
Put the first controlling switch and the second controlling switch being connected in series；First controlling switch is open type controlling switch, works as electricity
Ladder is in normal condition and not in the bottom, the first controlling switch closure；Second controlling switch is closed type control
System switch, when elevator bottom door is closed or elevator resets, the second controlling switch is opened.
It is preferred that the control device also includes the first relay of control first controlling switch.
It is preferred that the control device also includes the second relay of control second controlling switch.
Brief description of the drawings
Fig. 1 is the principle assumption diagram of the vertical lift pit overhaul resetting means of one embodiment of the invention.
Fig. 2 is Fig. 1 vertical lift pit overhaul resetting means circuit connection diagram.
Embodiment
To describe technology contents, architectural feature, realization principle and the objects and the effects of the present invention in detail, tie below
Close embodiment and coordinate accompanying drawing to be explained in detail.
Fig. 1 shows the vertical lift pit overhaul resetting means of one exemplary embodiment of the present invention, including alarm
Device (such as siren, buzzer), when elevator bottom door is opened pit to be entered, if not acting pit inspection
Bit switch is repaired, elevator is in normal condition (i.e. in can normal operating condition), and not in bottommost floor, warning device is sent
Alarm, reminds maintenance personal to act pit overhaul reset switch in time, elevator is entered inspecting state, pause is used, so that really
Protect the safety of elevator service personnel.Moreover, under conditions of in the absence of potential safety hazard, such as elevator bottom door be not opened or
Elevator is in bottommost floor, or elevator is in malfunction, inspecting state etc., and warning device does not send alarm, effectively protects
The reliability of vertical lift pit overhaul resetting means of the present invention is demonstrate,proved.
In another embodiment of vertical lift pit overhaul resetting means of the present invention, as depicted in figs. 1 and 2, also wrap
Include the control device of control warning device.In the present embodiment, control device is included with the warning device (in the present embodiment
For buzzer JN) the first controlling switch K1 and the second controlling switch K2 that are connected in series.The first controlling switch K1 is normally opened
Type controlling switch, when elevator is in normal condition and during not in the bottom, the first controlling switch K1 closures, in the case of other
It is in open mode.The second controlling switch K2 is closed type controlling switch, is resetted according to the maintenance of the elevator dynamic
Make and the folding condition of elevator bottom door is acted, when elevator bottom door is closed or elevator resets, the second control
Switch K2 to open, closure state is in the case of other.In the case where elevator does not have potential safety hazard, i.e., elevator is in improper
Use state, or in normal operating condition but in the bottom, the first controlling switch K1 is in open mode, warning device
Current loop be disconnected, it is impossible to alarm, after elevator bottom door is opened, if elevator is in normal condition, and again not
In the bottom, if elevator is not reset, there is potential safety hazard into pit, the first controlling switch J1 rings in this condition
Should, closure is changed into from opening, the second controlling switch K2 is not responding to, is kept closed, the conducting of warning device current loop is sent
Alarm.In the present embodiment, the first controlling switch K1 selections are controlled by the first relay J1, and the second controlling switch K2 selections are by the
Two relay J2 are controlled, and selection, as control element, can conveniently extend control range by relay, and signal sensitivity is high.
In another embodiment of vertical lift pit overhaul resetting means of the present invention, also include resetting means and communication
Device.Resetting means include be used for elevator carry out overhaul reset reset circuit and with the reset circuit be electrically connected with answer
Bit switch AK, makes elevator enter maintenance reset state by acting reset switch AK.Communication device (is schemed with elevator main control board respectively
Not shown in) and control device electric connection, the real-time running status of elevator and residing floor are obtained at elevator main control board, when
Elevator is cut not in bottommost floor in normal condition, and communication device control control device sends action, specially controls first
Relay J1 adhesives, so that the first controlling switch K1 is closed, under elevator bottom door open mode, the second relay J2
Not adhesive, the second controlling switch K2 is in closure state, warning device alarm.
In another embodiment of vertical lift pit overhaul resetting means of the present invention, also include supply unit and peace
Full device.Supply unit, for providing dc source for the communication device, warning device and the control device, safety
Device is used for the folding condition for detecting elevator bottom door, and in the present embodiment, safety device includes door interlock switch MJS, door lock
Switch MJS is connected between control device and reset switch, the folding condition of detection elevator bottom door, when elevator bottom door
During opening, door interlock switch is beaten MJS and opened, when elevator bottom door is in closure state, door interlock switch MJS closures.
Reset switch AK includes four groups of switching points position (as needed also can be by multigroup) in the present embodiment, is the respectively
One switching point position 1,2, second switch point position 3,4, the 3rd switching point position the 5,6 and the 4th switching point position 7,8.Pass through the 3rd switching point
Position and the 4th switching point position are connected with reset circuit, when reset switch AK is acted, start reset circuit.First switch point position 1,2
Be arranged between the second relay J2 and power supply, second switch point position 3,4 be arranged on the second relay J2 and door interlock switch MJS it
Between.In the present embodiment, the specific connected mode on the first relay J1 and the second relay J2 is：First relay J1's
One power end is connected with the negative pole VCC- of the supply unit, and another power end of the first relay J1 passes through an electronic cutting
The positive pole VCC+ for closing KM and the supply unit is electrically connected with, and the electronic switch KM is electrically connected with the communication device, by
The control of the communication device；The negative pole VCC- of a power end and the supply unit of the second relay J2 electrically connects
Connect, another power end of the second relay J2 respectively with the first switch point position 1 of the reset switch AK and described
Second switch point position 4 is electrically connected with, and the first switch point position 2 and the positive pole VCC+ of the supply unit are electrically connected with, described
Second switch point position 3 is electrically connected with by the positive pole VCC+ of the door interlock switch MJS and the supply unit, the first switch
Point position 1,2 is open type, and the second point 3,4 bit switches are closed type.
When elevator is in normal condition and during not in bottommost floor, communication device control electronic switch KM closures, first after
Electrical equipment J1 obtains electric adhesive, so that the first controlling switch closes K1 conjunctions.Now, if elevator bottom door is opened, at door interlock switch MJS
In open mode, and reset switch AK is not operating, and first switch point position 1,2 is in open mode, and second switch point position 3,4 is in
Closure state, the second relay J2 must not electricity, not adhesive, so that the second controlling switch K2 is maintained at closure state, and then alarm
The current loop conducting of device, sends alarm signal.When sending alarm signal, action reset switch AK causes elevator to be reset into
Enter service mode, then first switch point position 1,2 is closed, second switch point position 3,4 is opened, and the second relay J2 obtains electric adhesive, from
And the second controlling switch K2 is changed into opening from closing, the current loop of warning device is disconnected, and terminates alarm.
When elevator is in normal condition and during not in bottommost floor, communication device control electronic switch KM closures, first after
Electrical equipment J1 obtains electric adhesive, so that the first controlling switch K1 is closed.Now, if elevator bottom door is not opened, door interlock switch
MJS is in closure state, then regardless of whether action reset switch the second relays of AK J2 electric adhesive so that second controls
Switch K2 is changed into opening from closing, and warning device is not alarmed.
When elevator is in malfunction, communication device control electronic switch KM is in open mode, the first relay J1
Not adhesive, then the first controlling switch K1 is in state of checking card, and warning device can not alarm.
When elevator is in the bottom in normal condition, and elevator, without potential safety hazard, therefore communication device controls electronics
Switch KM and be in open mode, the first relay J1 not adhesives, then the first controlling switch K1 be in and check card state, warning device is not
Can alarm.
When reset switch AK is opened in operating state, and elevator bottom door, door interlock switch MJS disconnects, and first
Switching point position 1,2 is changed into closure from opening, and second switch point position 3,4 is changed into opening from closure, and the second relay J2 obtains electric adhesive,
Second controlling switch K2 is changed into opening from closing, therefore the current loop of warning device is disconnected, and is not in the situation of false alarm.
In order to avoid in the case of without potential safety hazard, if the false alarm that the first controlling switch K1 short circuits are caused, this
The control device of the vertical lift pit overhaul resetting means of invention in another embodiment also includes one and the second switch
3,4 bit serials of point, the threeth controlling switch K3 in parallel with the door interlock switch MJS, i.e. the 3rd controlling switch K3 one end and electricity
The positive pole VCC+ connections of source device, the other end is connected between door interlock switch MJS and second switch point position 3, the 3rd control
Switch K3 is controlled by the first relay J1, is closed type switch.In the case of no potential safety hazard, when opening elevator
Without triggering warning device in the case of no action elevator reset switch AK during bottom door, now door interlock switch MJS
Open, electronic switch KM is opened, first switch point position 1,2 is opened, second switch point position 3,4 is closed, if but now first
Controlling switch K1 short circuits certainly will will also result in the false triggering of warning device, because the 3rd controlling switch K3 switchs for closed type, because
This causes the second relay J2 to obtain electric adhesive in this case, and then the second controlling switch K2 is changed into opening from closing, alarm
The current loop of device is disconnected, it is to avoid false triggering.
In another preferred embodiment of the vertical lift pit overhaul resetting means of the present invention, communication device includes
MODBUS communication modules, precision is high, and matching is good, and supply unit uses the Switching Power Supply of elevator, and power supply is set without extra again,
Save production cost.
Above disclosed is only the preferred embodiments of the present invention, can not limit the right model of the present invention with this certainly
Enclose, therefore the equivalent variations made according to scope of the present invention patent, still fall within the scope that the present invention is covered.
Claims (18)
1. a kind of vertical lift pit overhaul resetting means, it is characterised in that including supply unit, communication device, safety device,
Pit overhaul resetting means, warning device and control device；
The supply unit, for providing dc source for the communication device, warning device and the control device；
The communication device, is electrically connected with, the fortune for monitoring the elevator with elevator main control board and the warning device respectively
Row state and residing floor；
The safety device, the folding condition for detecting elevator bottom door；
The pit overhaul resetting means, includes the reset of the reset circuit and the control reset circuit for being resetted to elevator
Switch；
The control device, is electrically connected with, the action for controlling the warning device, when the elevator with the warning device
In normal condition and not in bottommost floor, if the safety device detects the elevator bottom, door is in open mode,
Start warning device.
2. vertical lift pit overhaul resetting means according to claim 1, it is characterised in that the safety device includes
Door interlock switch, the door interlock switch is connected in series between the control device and the reset switch, follows the elevator bottom
Door folding and folding.
3. vertical lift pit overhaul resetting means according to claim 2, it is characterised in that the reset switch includes
The switching point position of four groups of independence, is first switch point position, second switch point position, the 3rd switching point position and the 4th switching point respectively
Position, the reset switch is electrically connected with by the 3rd switching point position and the 4th switching point position with the reset circuit.
4. vertical lift pit overhaul resetting means according to claim 3, it is characterised in that the control device includes
The first controlling switch and the second controlling switch being connected in series with the warning device；First controlling switch is open type control
System switch, is acted according to the output signal of the communication device；Second controlling switch is closed type controlling switch, root
Acted according to the action of the reset switch and the door interlock switch.
5. vertical lift pit overhaul resetting means according to claim 4, it is characterised in that the control device is also wrapped
Include the first relay of a control first controlling switch, a power end and the supply unit of first relay
Negative pole is connected, and another power end of first relay is electrically connected by the positive pole of an electronic switch and the supply unit
Connect, the electronic switch is electrically connected with the communication device, is controlled by the communication device.
6. vertical lift pit overhaul resetting means according to claim 4, it is characterised in that the control device is also wrapped
Include the second relay of a control second controlling switch, a power end and the supply unit of second relay
Negative pole is electrically connected with, another power end of second relay respectively with the first switch point position of the reset switch and
One end of the second switch point position is electrically connected with, the other end of the first switch point position and the positive pole electricity of the supply unit
Property connection, the other end of second switch point position is electrically connected with by the positive pole of the door interlock switch and the supply unit,
The first switch point position is open type, and the second switch point position is closed type.
7. vertical lift pit overhaul resetting means according to claim 6, it is characterised in that the control device is also wrapped
Include one and the second switch point bit serial, threeth controlling switch in parallel with the door interlock switch, the 3rd controlling switch
Controlled by first relay, be closed type switch.
8. vertical lift pit overhaul resetting means according to claim 1, it is characterised in that the communication device includes
MODBUS communication modules.
9. vertical lift pit overhaul resetting means according to claim 1, it is characterised in that the supply unit is institute
State the Switching Power Supply of elevator.
10. a kind of vertical lift pit overhaul resetting means, it is characterised in that including communication device, resetting means, warning device
And control device；
The communication device, is electrically connected with elevator main control board and the control device, for the fortune according to the elevator respectively
Row state and residing floor control the action of the control device；
The resetting means, including reset circuit and the reset switch of the control reset circuit for being resetted to elevator；
The control device, is electrically connected with, the action for controlling the warning device, when the elevator with the warning device
In normal condition and not in bottommost floor, if elevator bottom door is in open mode, start warning device.
11. vertical lift pit overhaul resetting means according to claim 10, it is characterised in that the control device bag
Include the first controlling switch and the second controlling switch being connected in series with the warning device；First controlling switch is open type
Controlling switch, when elevator is in normal condition and during not in the bottom, the first controlling switch closure；Second control is opened
Close as closed type controlling switch, when elevator bottom door is closed or reset switch is acted, the second controlling switch opening.
12. vertical lift pit overhaul resetting means according to claim 11, it is characterised in that the control device is also
Include the first relay of control first controlling switch.
13. vertical lift pit overhaul resetting means according to claim 11, it is characterised in that the control device is also
Include the second relay of control second controlling switch.
14. vertical lift pit overhaul resetting means according to claim 10, it is characterised in that the communication device is
MODBUS communication modules.
15. a kind of vertical lift pit overhaul resetting means, it is characterised in that including warning device, when the elevator bottom
When door is in open mode, if the elevator is in normal condition, and not in bottommost floor, the warning device sends report
It is alert.
16. vertical lift pit overhaul resetting means according to claim 15, it is characterised in that also described including control
The control device of warning device, the control device includes the first controlling switch and second being connected in series with the warning device
Controlling switch；First controlling switch is open type controlling switch, when elevator is in normal condition and during not in the bottom, institute
State the first controlling switch closure；Second controlling switch is closed type controlling switch, when elevator bottom door is closed or elevator
During reset, the second controlling switch is opened.
17. vertical lift pit overhaul resetting means according to claim 16, it is characterised in that the control device is also
Include the first relay of control first controlling switch.
18. vertical lift pit overhaul resetting means according to claim 16, it is characterised in that the control device is also
Include the second relay of control second controlling switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710433117.2A CN107140496B (en) | 2017-06-09 | 2017-06-09 | Vertical elevator pit overhauling and resetting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710433117.2A CN107140496B (en) | 2017-06-09 | 2017-06-09 | Vertical elevator pit overhauling and resetting device |
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| Publication Number | Publication Date |
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| CN107140496A true CN107140496A (en) | 2017-09-08 |
| CN107140496B CN107140496B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710433117.2A Active CN107140496B (en) | 2017-06-09 | 2017-06-09 | Vertical elevator pit overhauling and resetting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110077929A (en) * | 2019-05-22 | 2019-08-02 | 快意电梯股份有限公司 | Install the shallow pit electrical system of elevator additional |
| CN110861989A (en) * | 2019-11-14 | 2020-03-06 | 宁波宏大电梯有限公司 | Elevator audible and visual alarm control switching circuit |
| CN115009946A (en) * | 2022-06-17 | 2022-09-06 | 永大电梯设备（中国）有限公司 | Protection method for overhauling and resetting elevator pit |
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| CN205274930U (en) * | 2016-01-19 | 2016-06-01 | 重庆富菱达电梯有限公司 | Passenger lift warning lighting system |
| CN105460725A (en) * | 2016-01-20 | 2016-04-06 | 孟令海 | Lift door state monitor and fault judging method thereof |
| CN207312853U (en) * | 2017-06-09 | 2018-05-04 | 快意电梯股份有限公司 | Vertical lift pit overhaul resetting apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110077929A (en) * | 2019-05-22 | 2019-08-02 | 快意电梯股份有限公司 | Install the shallow pit electrical system of elevator additional |
| CN110861989A (en) * | 2019-11-14 | 2020-03-06 | 宁波宏大电梯有限公司 | Elevator audible and visual alarm control switching circuit |
| CN115009946A (en) * | 2022-06-17 | 2022-09-06 | 永大电梯设备（中国）有限公司 | Protection method for overhauling and resetting elevator pit |
| CN115009946B (en) * | 2022-06-17 | 2024-01-30 | 永大电梯设备（中国）有限公司 | Protection method for elevator pit maintenance and restoration |
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