CN112456267B - Electrical safety detection control circuit for elevator maintenance operation - Google Patents
Electrical safety detection control circuit for elevator maintenance operation Download PDFInfo
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- CN112456267B CN112456267B CN202011325102.2A CN202011325102A CN112456267B CN 112456267 B CN112456267 B CN 112456267B CN 202011325102 A CN202011325102 A CN 202011325102A CN 112456267 B CN112456267 B CN 112456267B
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- 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
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
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- 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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Abstract
An electrical safety detection control circuit for elevator overhaul operation comprises a pit overhaul loop, an elevator controller and a hall station external call display panel circuit. The hall call-out display board circuit is used for sending an elevator shutdown command to the elevator controller, and the elevator controller responds to the elevator shutdown command to shut down the elevator, stop the elevator car at a stopping layer which is not the bottommost layer and forbid opening of the car door and the hall door. The pit overhauls the return circuit and sets up in the pit of elevator for carry out pit when overhauing to the elevator and control the car operation of elevator through elevator controller. When pit maintenance is carried out on the elevator, the pit maintenance loop set in the pit of the elevator controls the car of the elevator to run, so that the inconvenience of maintenance and repair operation of maintenance personnel at the pit and the bottom of the car is solved, and the safety of maintenance and control of the car running of the maintenance personnel at the pit is guaranteed.
Description
Technical Field
The invention relates to the technical field of elevator equipment, in particular to an electrical safety detection control circuit for elevator maintenance operation.
Background
Along with the development of science and technology, elevators are also more and more popular, and elevator maintenance operation is an operation mode of elevators and plays an important role in installation, debugging, daily maintenance, inspection and elevator fault state rescue. Especially when the pit maintains, maintains the operation to the car bottom, the pit maintenance personnel can't operate the car operation control and move to suitable position and carry out the operation to need another maintenance personnel to control the car operation at sedan-chair top or computer lab. However, maintenance personnel controlling the movement of the car cannot effectively observe the position of the car in time due to distance or environmental factors, and danger is increased for pit maintenance personnel.
Disclosure of Invention
The invention mainly solves the technical problem that when a pit overhauls an elevator, danger is increased to pit maintenance personnel because the running state of a lift car cannot be monitored.
According to a first aspect, an embodiment provides an electrical safety detection control circuit for elevator service operation, comprising a pit service loop, an elevator controller and a hall call display panel circuit;
the hall call display panel circuit is used for sending an elevator shutdown command to the elevator controller;
the elevator controller responds to the elevator stopping command, stops the elevator car at a stopping layer which is not the bottommost layer, and forbids opening of the elevator car door and the elevator hall door;
the pit overhauls the return circuit and sets up at the pit of elevator for when carrying out the pit to the elevator and overhauls, to the elevator controller sends the pit and overhauls ascending signal or the pit overhauls down signal, with being used for the elevator controller response the pit overhauls ascending signal or the pit overhauls down the car of down signal control elevator and goes upward or down.
In one embodiment, the hall call-out display board circuit comprises an uplink switch button, and when the uplink switch button is continuously conducted for a preset time, the hall call-out display board circuit sends the elevator shutdown command to the elevator controller.
In one embodiment, the hall call-out display panel circuit is further configured to send an elevator recovery command to the elevator controller, and the elevator controller is configured to resume elevator operation in response to the elevator recovery command.
In one embodiment, after the elevator is shut down, when the uplink switch button is continuously conducted for the preset time, the hall station external call display board circuit sends the elevator recovery command to the elevator controller.
In one embodiment, the pit maintenance loop comprises a pit linkage switch LDJ, a control electric signal input end, a pit maintenance signal output end, a pit maintenance downlink signal output end and a pit maintenance uplink signal output end;
the pit linkage switch LDJ is linked with a pit maintenance switch of an elevator safety loop, when the pit maintenance switch is switched on, the pit linkage switch LDJ is switched on, and a control electric signal input by the control electric signal input end is output to the elevator controller through the pit maintenance signal output end so as to control the elevator controller to enter a pit maintenance mode;
and the pit maintenance mode is that the elevator controller only responds to the control electric signal output by the pit maintenance downlink signal output end or the pit maintenance uplink signal output end of the pit maintenance loop to control the lift car to go up or down.
In one embodiment, the pit overhaul loop further comprises a running common switch RUN, an up switch UPL and a down switch DOWJ;
the pit ganged switch LDJ is a duplex switch and comprises a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, the first connecting end and the third connecting end of the pit ganged switch LDJ are connected with the control electric signal input end, and the second connecting end of the pit ganged switch LDJ is connected with the pit maintenance signal output end;
one end of a public switch RUN is connected with a third connecting end of a pit gang switch LDJ, the other end of the public switch RUN is connected with one end of an uplink switch UPL and one end of a downlink switch DOWJ, the other end of the uplink switch UPL is connected with a pit maintenance uplink signal output end, and the other end of the downlink switch DOWJ is connected with a pit maintenance downlink signal output end.
In one embodiment, the elevator further comprises a car top maintenance loop which is arranged on the car top of the elevator; the car top maintenance loop comprises a car top linkage switch LDJ, a control electric signal input end, a car top maintenance signal output end, a car top maintenance downlink signal output end and a car top maintenance uplink signal output end;
the car top linkage switch LDJ is linked with a car top maintenance switch of an elevator safety loop, when the car top maintenance switch is switched on, the car top linkage switch LDJ is switched on, and a control electrical signal input by the control electrical signal input end is output to the elevator controller through the pit maintenance signal output end so as to control the elevator controller to enter a car top maintenance mode;
the car top maintenance mode is that the elevator controller only responds to the control electric signal output by the car top maintenance loop through the car top maintenance downlink signal output end or the car top maintenance uplink signal output end to control the car to uplink or downlink.
In one embodiment, the elevator system further comprises an emergency maintenance loop which is arranged in a machine room of the elevator; the emergency maintenance loop comprises an emergency linkage switch LDJ, a control electric signal input end, an emergency maintenance signal output end, an emergency maintenance downlink signal output end and an emergency maintenance uplink signal output end;
the emergency linkage switch LDJ is linked with an emergency maintenance switch of an elevator safety loop, when the emergency maintenance switch is switched on, the emergency linkage switch LDJ is switched on, and a control electric signal input by the control electric signal input end is output to the elevator controller through the emergency maintenance signal output end so as to control the elevator controller to enter an emergency maintenance mode;
the emergency maintenance mode is that the elevator controller only responds to the control electric signal output by the emergency maintenance downlink signal output end or the emergency maintenance uplink signal output end of the emergency maintenance loop to control the lift car to move upwards or downwards.
According to a second aspect, an embodiment provides an electrical safety detection control method for an elevator service operation, comprising:
responding to an elevator shutdown command sent by the hall call display panel circuit to shutdown the elevator;
stopping the lift car at a stopping layer which is not the bottommost layer, and forbidding opening of a lift car door and a hall door;
and the ascending or descending of the lift car is controlled only by responding to a pit maintenance descending signal and a pit maintenance ascending signal sent by a pit maintenance loop arranged in the elevator pit.
In one embodiment, the method further comprises:
after the elevator stops running, the elevator is restored to run in response to an elevator restoration command sent by the hall outside call display panel circuit.
The electrical safety detection control circuit for the elevator overhauling operation comprises a pit overhauling loop, an elevator controller and a hall outside calling display panel circuit. The hall call-out display board circuit is used for sending an elevator shutdown command to the elevator controller, and the elevator controller responds to the elevator shutdown command to shut down the elevator, stop the elevator car at a stopping layer which is not the bottommost layer and forbid opening of the car door and the hall door. The pit overhauls the return circuit and sets up in the pit of elevator for carry out pit when overhauing to the elevator and control the car operation of elevator through elevator controller. When pit maintenance is carried out on the elevator, the pit maintenance loop set in the pit of the elevator controls the car of the elevator to run, so that the inconvenience of maintenance and repair operation of maintenance personnel at the pit and the bottom of the car is solved, and the safety of maintenance and control of the car running of the maintenance personnel at the pit is guaranteed.
Drawings
FIG. 1 is a schematic diagram of the electrical connection of an electrical safety detection control circuit in one embodiment;
fig. 2 is a schematic flow chart of an electrical safety detection control method in another embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
At the present stage, when the maintenance switch is reset at the non-flat position of the elevator car, the elevator can run immediately, so that the car runs to the flat position. When the pit is overhauled, the current situation can cause maintenance operators to be trapped in the pit or cause casualty accidents. If only an overhaul control cabinet device is added in the pit to control the operation of the car, the safety and the independence of the pit overhaul control car operation cannot be guaranteed.
In an embodiment of the invention, the elevator controller stops the car at a stopping floor other than the bottommost floor and prohibits opening of the car door and the hall door in response to an elevator stop command. The pit overhauls the return circuit and sets up in the pit of elevator for carry out pit when overhauing to the elevator and control the car motion of elevator through elevator controller. When pit maintenance is carried out on the elevator, the pit maintenance loop set in the pit of the elevator controls the movement of the elevator car, so that the inconvenience of maintenance and repair operation of maintenance personnel at the pit and the bottom of the elevator car is solved, and the safety of maintenance and control of the elevator car operation of the maintenance personnel at the pit is guaranteed.
The first embodiment is as follows:
referring to fig. 1, a schematic diagram of the circuit connection of an electrical safety detection control circuit in an embodiment includes an elevator controller 10, a pit inspection circuit 30, a hall call display panel circuit 20, and an elevator safety circuit 60. Hall call-out display panel circuit 20 is used to send an elevator shutdown command to elevator controller 10. The elevator controller 10 is used to stop the elevator and stop the car of the elevator at a stopping floor other than the lowermost floor while prohibiting the opening of the doors and hall doors of the elevator in response to an elevator stop command. The pit overhauls return circuit 30 and sets up in the pit of elevator for when carrying out the pit to the elevator and overhauls, send pit to overhaul to go up signal or pit to overhaul downstream signal to elevator controller 10 for elevator controller 10 responds pit to overhaul to go up signal or pit to overhaul downstream signal control elevator's car and goes upward or descend. In one embodiment, hall call indicator circuit 20 includes an up switch button that is continuously on for a predetermined time, and hall call indicator circuit 20 sends an elevator shutdown command to elevator controller 10. In one embodiment, hall call indicator circuit 20 is also operable to send an elevator restore command to elevator controller 10, and elevator controller 10 restores elevator operation in response to the elevator restore command. In one embodiment, after the elevator is stopped, when the up switch button is turned on again for a predetermined time, the hall call display panel circuit 20 sends an elevator recovery command to the elevator controller 10. In one embodiment, the predetermined time for the uplink switch button to be continuously turned on is 10 seconds.
As shown in fig. 1, the elevator safety circuit 60 is provided with a safety switch in each safety part of the elevator, and all the safety switches are connected in series to control a safety relay. Only under the condition that all safety switches are switched on, the safety relays are closed, and the elevator can be operated by power. In one embodiment, elevator safety loop 60 includes pit service switch PIS, ceiling service switch SDJ, and emergency service switch SGJ. In one embodiment, pit maintenance circuit 30 includes pit ganged switch LDJ, control electrical signal input, pit maintenance signal output, pit maintenance downlink signal output and pit maintenance uplink signal output, pit ganged switch LDJ links with pit maintenance switch PIS of elevator safety circuit 60, when pit maintenance switch PIS switches on, pit ganged switch LDJ switches on, and with control electrical signal Vcc input control electrical signal input, output for elevator controller 10 through pit maintenance signal output, for control elevator controller 10 enters pit maintenance mode. The pit inspection mode is that the elevator controller 10 controls the car to go up or down only in response to the control electric signal output by the pit inspection downlink signal output end or the pit inspection uplink signal output end of the pit inspection loop 30. In one embodiment, pit maintenance circuit 30 further includes a RUN common switch RUN, an up switch UPL and a down switch DOWJ. The pit ganged switch LDJ is a duplex switch and comprises a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, the first connecting end and the third connecting end of the pit ganged switch LDJ are connected with the control electric signal input end, and the second connecting end of the pit ganged switch LDJ is connected with the pit maintenance signal output end. One end of a public switch RUN is connected with a third connecting end of a pit gang switch LDJ, the other end of the public switch RUN is connected with one ends of an uplink switch UPL and a downlink switch DOWJ, the other end of the uplink switch UPL is connected with a pit maintenance uplink signal output end, and the other end of the downlink switch DOWJ is connected with a pit maintenance downlink signal output end.
In one embodiment, the electrical safety detection control circuit further comprises a ceiling maintenance loop 40 arranged on the ceiling of the elevator. The car top maintenance loop 40 comprises a car top linked switch LDJ, a control electrical signal input end, a car top maintenance signal output end, a car top maintenance downlink signal output end and a car top maintenance uplink signal output end, the car top linked switch LDJ is linked with a car top maintenance switch SDJ of the elevator safety loop 60, when the car top maintenance switch SDJ is switched on, the car top linked switch LDJ is switched on, and a control electrical signal Vcc input by the control electrical signal input end is output to the elevator controller 10 through the pit maintenance signal output end, so as to control the elevator controller 10 to enter a car top maintenance mode. The car top maintenance mode is that the elevator controller 10 controls the car to move upwards or downwards only in response to a control electric signal output by the car top maintenance circuit 40 through the car top maintenance downlink signal output end or the car top maintenance uplink signal output end.
In one embodiment, the electrical safety detection control circuit further comprises an emergency service circuit 50, which is disposed in the machine room of the elevator. The emergency maintenance circuit 50 comprises an emergency linkage switch LDJ, a control electric signal input end, an emergency maintenance signal output end, an emergency maintenance downlink signal output end and an emergency maintenance uplink signal output end, the emergency linkage switch LDJ is linked with the emergency maintenance switch SGJ of the elevator safety circuit 60, when the emergency maintenance switch SGJ is switched on, the emergency linkage switch LDJ is switched on, and a control electric signal Vcc input by the control electric signal input end is output to the elevator controller 10 through the emergency maintenance signal output end, so that the elevator controller 10 is controlled to enter an emergency maintenance mode. The emergency maintenance mode is that the elevator controller 10 controls the car to go up or down only in response to the control electric signal output by the emergency maintenance downlink signal output terminal or the emergency maintenance uplink signal output terminal of the emergency maintenance loop 50.
In an embodiment of the application, when a maintenance operator performs pit maintenance operation, the elevator is firstly called to the bottommost layer, the car door is closed after the car is confirmed to have no passenger, the elevator controller is made to know that the car moves upwards for one floor from the bottommost layer when the maintenance operator performs operation by pressing the up switch of the display board circuit outside the bottom-layer hall for 10 seconds, and then the elevator is stopped and enters an overhauling state. The scheme ensures the safety of passengers and is convenient for maintenance personnel to safely enter the pit. After entering the pit, maintenance personnel can control the elevator car to operate through the pit maintenance loop, so that the elevator car can operate to a proper position according to operation requirements. The pit overhauling loop comprises a pit linkage switch LDJ, a public switch RUN, an uplink switch UPL and a downlink switch DOWJ. And respectively sending a pit inspection signal X11, a pit inspection uplink signal X13 and a pit inspection downlink signal X12 to the elevator controller. When the elevator controller receives a pit overhaul signal X11, the elevator controller enters a pit overhaul mode, does not respond to the machine room emergency power mode and the car top overhaul mode, and the pit overhaul mode is highest in priority. And sending a pit maintenance uplink signal X13 or a pit maintenance downlink signal X12 to the elevator controller by simultaneously operating the pit maintenance loop, so that the elevator controller responds to the pit maintenance uplink signal X13 or the pit maintenance downlink signal X12 to control the operation of the elevator car. If the car roof needs to control the car to overhaul, the elevator control system detects that a pit overhaul signal X11 and a car roof overhaul signal X21 are effective and simultaneously detects that the operation signals of the pit and the car roof can be operated until the operation signals are effective, and the operation command of a pit overhaul loop is higher than that of a car roof overhaul loop. After the maintenance operation of the pit is completed, the person leaving the operation area presses an uplink switch button of the display panel circuit called outside the bottom-layer hall station for 10 seconds to carry out pit maintenance reset (the pit maintenance reset can be successfully reset only after an elevator system detects that the maintenance is invalid, an electric safety loop and a door lock loop are valid). And after pit maintenance and reset, the elevator car can carry out leveling layer operation in a non-leveling area. Thereby guaranteeing the life safety of pit operation of elevator maintenance personnel.
In the embodiment of the application, the electrical safety detection control circuit comprises a pit overhaul loop, an elevator controller and a hall outside call display panel circuit. The hall call-out display board circuit is used for sending an elevator shutdown command to the elevator controller, and the elevator controller responds to the elevator shutdown command to shut down the elevator, stop the elevator car at a stopping layer which is not the bottommost layer and forbid opening of the car door and the hall door. The pit overhauls the return circuit and sets up in the pit of elevator for carry out pit when overhauing to the elevator and control the car operation of elevator through elevator controller. When pit maintenance is carried out on the elevator, the pit maintenance loop set in the pit of the elevator controls the car of the elevator to run, so that the inconvenience of maintenance and repair operation of maintenance personnel at the pit and the bottom of the car is solved, and the safety of maintenance and control of the car running of the maintenance personnel at the pit is guaranteed. The maintenance labor cost for the bottom pit and the bottom of the lift car is reduced, and the original simultaneous operation of two persons is reduced to one person to independently complete. The technical scheme of realizing the new national standard GB758-2003 Elevator manufacturing and installation safety standard 5.12.1.5 inspection operation control standard is solved.
Example two:
referring to fig. 2, a schematic flow chart of an electrical safety detection control method in another embodiment includes:
and step 100, stopping the elevator.
The elevator is stopped in response to an elevator stop command sent by the hall call display panel circuit.
And step 200, forbidding opening of the car door and the hall door.
The car is stopped at a stopping layer which is not the bottommost layer, and the opening of the car door and the hall door is forbidden.
And step 300, the lift car overhauls in an ascending or descending mode.
And the ascending or descending of the lift car is controlled only by responding to a pit maintenance descending signal and a pit maintenance ascending signal sent by a pit maintenance loop arranged in the elevator pit.
In one embodiment, the electrical safety detection control method further includes:
and 400, returning the elevator to operate.
After the elevator stops running, the elevator is restored to run in response to an elevator restoration command sent by the hall outside call display panel circuit.
Those skilled in the art will appreciate that all or part of the functions of the various methods in the above embodiments may be implemented by hardware, or may be implemented by computer programs. When all or part of the functions of the above embodiments are implemented by a computer program, the program may be stored in a computer-readable storage medium, and the storage medium may include: a read only memory, a random access memory, a magnetic disk, an optical disk, a hard disk, etc., and the program is executed by a computer to realize the above functions. For example, the program may be stored in a memory of the device, and when the program in the memory is executed by the processor, all or part of the functions described above may be implemented. In addition, when all or part of the functions in the above embodiments are implemented by a computer program, the program may be stored in a storage medium such as a server, another computer, a magnetic disk, an optical disk, a flash disk, or a removable hard disk, and may be downloaded or copied to a memory of a local device, or may be version-updated in a system of the local device, and when the program in the memory is executed by a processor, all or part of the functions in the above embodiments may be implemented.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (6)
1. An electrical safety detection control circuit for elevator overhaul operation is characterized by comprising a pit overhaul loop, an elevator controller and a hall station external call display panel circuit;
the hall call display panel circuit is used for sending an elevator shutdown command to the elevator controller;
the elevator controller responds to the elevator stopping command, stops the elevator car at a stopping layer which is not the bottommost layer, and forbids opening of the elevator car door and the elevator hall door;
the pit overhauling loop is arranged in a pit of the elevator and used for sending a pit overhauling uplink signal or a pit overhauling downlink signal to the elevator controller when the elevator is subjected to pit overhauling so that the elevator controller responds to the pit overhauling uplink signal or the pit overhauling downlink signal to control the elevator car of the elevator to move upwards or downwards; the hall station external call display panel circuit comprises an uplink switch button, and when the uplink switch button is continuously conducted for a preset time, the hall station external call display panel circuit sends the elevator shutdown command to the elevator controller; the hall call-out display panel circuit is also used for sending an elevator recovery command to the elevator controller; after the elevator is stopped, when the uplink switch button is continuously conducted for the preset time, the hall station external calling display board circuit sends the elevator recovery command to the elevator controller, and the elevator controller responds to the elevator recovery command to recover the operation of the elevator.
2. The electrical safety detection control circuit according to claim 1, wherein the pit maintenance loop comprises a pit ganging switch LDJ, a control electrical signal input, a pit maintenance signal output, a pit maintenance downlink signal output, and a pit maintenance uplink signal output;
the pit linkage switch LDJ is linked with a pit maintenance switch of an elevator safety loop, when the pit maintenance switch is switched on, the pit linkage switch LDJ is switched on, and a control electric signal input by the control electric signal input end is output to the elevator controller through the pit maintenance signal output end so as to control the elevator controller to enter a pit maintenance mode;
and the pit maintenance mode is that the elevator controller only responds to the control electric signal output by the pit maintenance downlink signal output end or the pit maintenance uplink signal output end of the pit maintenance loop to control the lift car to go up or down.
3. The electrical safety detection control circuit of claim 2, wherein the pit maintenance loop further comprises a RUN common switch RUN, an up switch UPL, and a down switch DOWJ;
the pit ganged switch LDJ is a duplex switch and comprises a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, the first connecting end and the third connecting end of the pit ganged switch LDJ are connected with the control electric signal input end, and the second connecting end of the pit ganged switch LDJ is connected with the pit maintenance signal output end;
one end of a public switch RUN is connected with a third connecting end of a pit gang switch LDJ, the other end of the public switch RUN is connected with one end of an uplink switch UPL and one end of a downlink switch DOWJ, the other end of the uplink switch UPL is connected with a pit maintenance uplink signal output end, and the other end of the downlink switch DOWJ is connected with a pit maintenance downlink signal output end.
4. The electrical safety detection control circuit according to claim 2, further comprising a ceiling maintenance loop disposed on a ceiling of the elevator; the car top maintenance loop comprises a car top linkage switch LDJ, a control electric signal input end, a car top maintenance signal output end, a car top maintenance downlink signal output end and a car top maintenance uplink signal output end;
the car top linkage switch LDJ is linked with a car top maintenance switch of an elevator safety loop, when the car top maintenance switch is switched on, the car top linkage switch LDJ is switched on, and a control electrical signal input by the control electrical signal input end is output to the elevator controller through the car top maintenance signal output end so as to control the elevator controller to enter a car top maintenance mode;
the car top maintenance mode is that the elevator controller only responds to the control electric signal output by the car top maintenance loop through the car top maintenance downlink signal output end or the car top maintenance uplink signal output end to control the car to uplink or downlink.
5. The electrical safety detection control circuit according to claim 2, further comprising an emergency service circuit provided in a machine room of the elevator; the emergency maintenance loop comprises an emergency linkage switch LDJ, a control electric signal input end, an emergency maintenance signal output end, an emergency maintenance downlink signal output end and an emergency maintenance uplink signal output end;
the emergency linkage switch LDJ is linked with an emergency maintenance switch of an elevator safety loop, when the emergency maintenance switch is switched on, the emergency linkage switch LDJ is switched on, and a control electric signal input by the control electric signal input end is output to the elevator controller through the emergency maintenance signal output end so as to control the elevator controller to enter an emergency maintenance mode;
the emergency maintenance mode is that the elevator controller only responds to the control electric signal output by the emergency maintenance downlink signal output end or the emergency maintenance uplink signal output end of the emergency maintenance loop to control the lift car to move upwards or downwards.
6. An electrical safety detection control method for elevator maintenance operation is characterized by comprising the following steps:
responding to an elevator shutdown command sent by the hall call display panel circuit to shutdown the elevator;
stopping the lift car at a stopping layer which is not the bottommost layer, and forbidding opening of a lift car door and a hall door;
the ascending or descending of the lift car is controlled only by responding to a pit maintenance descending signal and a pit maintenance ascending signal sent by a pit maintenance loop arranged in the elevator pit;
after the elevator stops running, the elevator is restored to run in response to an elevator restoration command sent by the hall outside call display panel circuit.
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