CN111115401B - Additional elevator safety loop and elevator safety system - Google Patents
Additional elevator safety loop and elevator safety system Download PDFInfo
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- CN111115401B CN111115401B CN201811282360.XA CN201811282360A CN111115401B CN 111115401 B CN111115401 B CN 111115401B CN 201811282360 A CN201811282360 A CN 201811282360A CN 111115401 B CN111115401 B CN 111115401B
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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
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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Abstract
The invention discloses an additional elevator safety loop, when a safety system action switch is closed, an upper stop action switch, a lower stop action switch and a guardrail extension switch are all in place, and then overhaul operation can be carried out, when an auxiliary lower limit switch is disconnected, an elevator can only be overhauled and operated upwards and cannot be overhauled and operated downwards, and when an auxiliary upper limit switch is disconnected, the elevator can only be overhauled and operated downwards and cannot be overhauled and operated upwards; when the reset switch of the safety system is in a reset state, normal operation can be recovered only after the upper stop reset switch, the lower stop reset switch, the toe guard withdrawing switch and the guardrail withdrawing switch are all in place. The invention also discloses an elevator safety system comprising the additional elevator safety loop, which can realize the action and reset functions of the elevator safety system without software participation and can realize various control functions described in GB 28621-2012 standard.
Description
Technical Field
The invention relates to an elevator safety technology, in particular to an additional elevator safety loop and an elevator safety system.
Background
With the development of cities, high-rise buildings rise frequently, and the use of elevators is more and more popular. With the increasing number of safety accidents caused by elevator equipment failures, elevator functional safety is increasingly emphasized.
At present, the safety system of an elevator adopts an electric safety chain to realize safety control, the safety chain is a safety loop formed by connecting a safety switch and a relay in series, and when any safety switch acts, the safety chain is disconnected, so that the operation of a driver and a brake is forbidden (the brake keeps a contracting brake state). The safety switches in the safety chain are distributed at all positions of the elevator, and some safety switches are in a machine room, such as a main machine emergency stop switch, a control cabinet emergency stop switch, a hall door lock, a speed limiter electric switch and the like; some of the devices are arranged in a lift car, such as a lift car door lock, a lift car top emergency stop switch and the like; some in the hoistway, pit, etc.
According to GB 28621-2012 "new elevator manufacturing and installation safety code installed in existing buildings, this standard allows to use the related art to achieve shallow pits and low floors when adding new elevators or replacing the original elevators in existing buildings.
Disclosure of Invention
The invention aims to solve the technical problems that the action and reset functions of the elevator safety system can be realized without software participation, various control functions described in GB 28621 and 2012 standards can be realized, and the standard elevator can be quickly transformed into an additional elevator corresponding to the GB 28621 and 2012 standards.
In order to solve the technical problem, the invention provides an additional elevator safety loop, which comprises a maintenance operation loop 1 and an automatic operation loop 4;
the overhaul operation loop 1 comprises an upper stop action switch 11, a lower stop action switch 12, a guardrail extension switch 13, a car top overhaul switch 14, a pit overhaul switch 15, a car top operation switch 16, a pit operation switch 17, a car top down switch 18, a pit down switch 19, a car top up switch 20, a pit up switch 21, an auxiliary upper limit switch 22, an auxiliary lower limit switch 23 and a plurality of safety system action switches 10;
the safety system action switches 10 are connected in parallel and the input end of the safety system action switches is connected with the working power supply V1;
the upper stop action switch 11, the lower stop action switch 12 and the guardrail extension switch 13 are connected in series, and the inlet end is connected with the parallel outlet end of the safety system action switch 10;
the car top maintenance switch 14 and the car top operation switch 16 are connected in series, and the input end is connected with the series output end of the upper stop action switch 11, the lower stop action switch 12 and the guardrail extension switch 13;
the pit maintenance switch 15 and the pit operation switch 17 are connected in series, and the input end is connected with the series output end of the upper stop action switch 11, the lower stop action switch 12 and the guardrail extension switch 13;
the input end of the car top down switch 18 is connected with the serial output ends of the car top overhaul switch 14 and the car top running switch 16, and the output end of the car top down switch 18 is connected with the input end of the auxiliary lower limit switch 23;
the input end of the pit descending switch 19 is connected with the serial output ends of the pit overhauling switch 15 and the pit running switch 17, and the output end of the pit descending switch 19 is connected with the input end of the auxiliary lower limit switch 23;
the input end of the car top uplink switch 20 is connected with the serial output ends of the car top overhaul switch 14 and the car top running switch 16, and the output end of the car top uplink switch 20 is connected with the input end of the auxiliary upper limit switch 22;
the input end of the pit uplink switch 21 is connected with the serial output ends of the pit overhaul switch 15 and the pit operation switch 17, and the output end of the pit uplink switch 21 is connected with the input end of the auxiliary upper limit switch 22;
the outlet end of the auxiliary lower limit switch 22 and the outlet end of the auxiliary upper limit switch 23 are short-circuited at a first jack P1 and are used for connecting a main elevator safety loop;
the safety system action switch 10 is a normally open switch, and a safety system action switch 10 is arranged at the elevator landing door of each floor and is closed when triggered by a user;
the upper stop motion switch 11 is normally open in an initial state and is arranged beside the upper stop device, the upper stop device is provided with a reset position and an effective position, and after the upper stop device is arranged at the effective position, the upper stop motion switch 11 is closed;
the lower stop motion switch 12 is normally open in an initial state and is arranged beside the lower stop device, the lower stop device has two positions, namely a reset position and an effective position, and after the lower stop device is arranged at the effective position, the state of the lower stop motion switch 12 is changed into a closed state;
the guardrail extension switch 13 is normally open in the initial state and is arranged beside the car top guardrail, and when the car top guardrail rises, the guardrail extension switch 13 is closed;
the car top maintenance switch 14 is disconnected in the initial state, is arranged on the top side of the car, and is selected to be closed when a user selects pit maintenance operation;
the pit overhauling switch 15 is disconnected in the initial state, is installed on the side of the pit, and is selected to be closed when a user selects pit overhauling operation;
the car top running switch 16 is disconnected in the initial state, is installed on the top side of the car, and is selected to be closed when a user carries out car top maintenance operation;
the pit operation switch 17 is disconnected in the initial state, is installed on the pit side, and is selected to be closed when a user carries out pit overhauling operation;
the car top down switch 18 is initially disconnected and is arranged on the top side of the car, and when a user overhauls and runs downwards on the car top, the car top down switch 18 is selected to be closed;
the pit descending switch 19 is disconnected in the initial state, is installed on the side of the pit, and is selected to be closed when a user overhauls and downwards runs in the pit;
the car top uplink switch 20 is disconnected in the initial state, is installed on the top side of the car, and is selected to be closed when a user overhauls and upwards runs on the car top;
the pit ascending switch 21 is disconnected in the initial state, is installed on the side of the pit, and is selected to be closed when a user overhauls and upwards runs at the bottom of the car;
the auxiliary upper limit switch 22 is normally closed in an initial state, is installed in the hoistway, and is turned off when the elevator car rises to an upper limit position;
the auxiliary lower limit switch 23 is normally closed in an initial state, is installed in the hoistway, and is turned off when the elevator car descends to a lower limit position;
the automatic operation loop 4 comprises an upper stop reset switch 41, a lower stop reset switch 42, a toe guard board withdrawing switch 43, a guardrail withdrawing switch 44 and a plurality of safety system reset switches 40;
the plurality of safety system reset switches 40 are connected in series and have an input terminal connected with the working power supply V1;
the upper stop reset switch 41, the lower stop reset switch 42, the toe guard board retracting switch 43 and the guardrail retracting switch 44 are connected in series, the inlet end of each safety system reset switch 40 is connected with the serial outlet end of the safety system reset switches, and the outlet end of each safety system reset switch is connected with a first plug port P1 for connecting a main elevator safety loop;
the safety system reset switch 40 is a normally closed switch, and a safety system reset switch 40 is arranged at the elevator landing door of each floor and is disconnected when triggered by a user;
the upper stop reset switch 41 is normally open in an initial state and is arranged beside the upper stop device, and when the lift car moves upwards to enable the upper stop device to be arranged at a reset position, the upper stop reset switch 41 is closed;
the lower stop reset switch 42 is normally open in the initial state and is arranged beside the lower stop device, and when the lift car moves downwards to enable the lower stop device to be arranged at the reset position, the lower stop reset switch 42 is switched on;
the toe guard withdrawing switch 43 is normally open in the initial state, is arranged beside the telescopic toe guard, and is closed when the toe guard is retracted;
the guardrail retraction switch 44 is normally open in the initial state and is mounted beside the extendable guardrail, and when the car top guardrail is retracted, the guardrail retraction switch 44 is closed.
Preferably, the maintenance operation loop 1 further includes an upper stop indication switch 31 and a lower stop indication switch 32;
the upper stop indicating switch 31 and the upper stop indicating lamp 33 are connected in series between the control power supply V2 and the ground;
the lower stop indication switch 32 and the lower stop indication lamp 34 are connected in series between the control power supply V2 and the ground;
the upper stop indication switch 31, the switch state of which is consistent with the upper stop operation switch 11 and acts synchronously;
the lower stop indication switch 32, the switching state of which is consistent with the lower stop operation switch 12 and operates synchronously;
the upper stop indicator light 33 is positioned at the top of the hoistway;
the lower stop indicator light 34 is located at the bottom of the hoistway.
Preferably, the overhaul operation loop 1 further comprises a relay;
the coil SL of the relay is connected between the parallel output ends of the plurality of safety system operation switches 10 and the ground;
the first group of contacts S1 of the relay is connected between the control power supply V2 and the detection port P3;
the second set of contacts S2 of the relay is connected in the automatic operation circuit 4;
the first group of contacts S1 are normally open contacts and are switched on after the relay coil SL is powered on;
the second set of contacts S2 are normally closed contacts that open upon energization of relay coil SL to open autorun circuit 4.
Preferably, the toe guard retracting switch 43 is directly connected in series with the guardrail retracting switch 44, and the emergency electric switch 50 is connected in parallel at two ends after the series connection;
the emergency electric switch 50 is normally open in an initial state, is installed at a landing side, and is selectively closed when a user selects emergency electric operation.
Preferably, the safety system operation switch 10 is a selection switch;
the upper stop motion switch 11 is a position switch;
the lower stop motion switch 12 is a position switch;
the guardrail extension switch 13 is a position switch;
the car top maintenance switch 14 is a selection switch;
the pit overhauling switch 15 is a selection switch;
the car top operation switch 16 is a self-resetting push switch;
the pit operation switch 17 is a self-resetting push switch;
the car roof down switch 18 is a self-resetting push switch;
the pit descending switch 19 is a self-resetting push switch;
the car top ascending switch 20 is a self-resetting push switch;
the pit ascending switch 21 is a self-resetting push switch;
the auxiliary upper limit switch 22 is a position switch;
the auxiliary lower limit switch 23 is a position switch;
the security system reset switch 40 is a selection switch;
the upper stop reset switch 41 is a position switch;
the lower stop reset switch 42 is a position switch;
the toe guard retraction switch 43 is a position switch;
the guardrail extension switch 44 is a position switch;
the emergency electric switch 50 is a selection switch;
the upper stop indication switch 31 is a position switch;
the lower stop indication switch 32 is a position switch.
In order to solve the technical problem, the elevator safety system provided by the invention comprises the additional elevator safety loop, and further comprises a main elevator safety loop 7;
the main elevator safety loop 7 comprises a main change-over switch 71, an emergency electric operation switch 72, a manual operation switch 73, a main uplink maintenance limit switch 74, a main downlink maintenance limit switch 75, an uplink operation switch 76, a downlink operation switch 77 and a slave change-over switch 78;
the main change-over switch 71, the emergency electric operation switch 72 and the manual operation switch 73 are connected in series, and the input end of the main change-over switch is used for connecting a first socket P1;
the main uplink maintenance limit switch 74 and the uplink operation switch 76 are connected in series, and the input end is connected with the series output end of the main change-over switch 71, the emergency electric operation switch 72 and the manual operation switch 73;
the main downlink maintenance limit switch 75 and the downlink operation switch 77 are connected in series, and the input end is connected with the series output end of the main change-over switch 71, the emergency electric operation switch 72 and the manual operation switch 73;
the serial output ends of the main uplink maintenance limit switch 74 and the uplink operation switch 76 and the serial output ends of the main downlink maintenance limit switch 75 and the downlink operation switch 77 are connected with a second socket P2;
the two ends of the slave change-over switch 78 are respectively connected with a first socket P1 and a second socket P2;
the main change-over switch 71 is a normally open contact of the safety relay and is arranged in the control screen, when the emergency electric switch 50 is closed, the coil of the safety relay is electrified, and the main change-over switch 71 is switched on;
the emergency electric operation switch 72, the switching state of which is consistent with the emergency electric switch 50 and acts synchronously;
the manual operation switch 73 is in an off state in an initial state, is installed on the landing side, and is selected to be turned on when the user selects emergency electric operation;
the main up-line maintenance limit switch 74, the on-off state of which is consistent with the auxiliary upper limit switch 22 and acts synchronously;
the main downlink maintenance limit switch 75 has the same switching state as the auxiliary lower limit switch 23 and acts synchronously;
the uplink running switch 76 is disconnected in the initial state, is installed on the floor station side, and is selected to be closed when the user selects the emergency electric upward running;
the downlink running switch 77 is disconnected in the initial state, is installed on the landing side, and is selected to be closed when the user selects the emergency electric downward running;
the slave changeover switch 78, which is a normally closed contact of the safety relay, is installed in the control panel, and when the emergency electric switch 50 is closed, the safety relay coil is energized to be disconnected from the changeover switch 78.
Preferably, the main switch 71 is a normally open contact of a safety relay;
the slave change-over switch 78 is a normally closed contact of the safety relay;
the emergency electric operation switch 72 is a selection switch;
the manual operation switch 73 is a self-resetting push switch;
the main up-line maintenance limit switch 74 is a position switch;
the main downlink maintenance limit switch 75 is a position switch;
the uplink running switch 76 is a self-resetting push switch;
the down running switch 77 is a self-resetting push switch.
The additional elevator safety loop can realize the action and reset functions of the elevator safety system only by being connected in series to the front stage of the original main elevator safety loop 7 without software participation, can realize various control functions described in GB 28621 and 2012 standards, has little change on the original elevator, and can quickly reform the standard elevator into an additional elevator corresponding to the GB 28621 and 2012 standards.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a circuit diagram of an embodiment of an elevator safety system of the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the additional elevator safety circuit includes a service operation circuit 1 and an automatic operation circuit 4;
the overhaul operation loop 1 comprises an upper stop action switch 11, a lower stop action switch 12, a guardrail extension switch 13, a car top overhaul switch 14, a pit overhaul switch 15, a car top operation switch 16, a pit operation switch 17, a car top down switch 18, a pit down switch 19, a car top up switch 20, a pit up switch 21, an auxiliary upper limit switch 22, an auxiliary lower limit switch 23 and a plurality of safety system action switches 10;
the safety system action switches 10 are connected in parallel and the input end of the safety system action switches is connected with the working power supply V1;
the upper stop action switch 11, the lower stop action switch 12 and the guardrail extension switch 13 are connected in series, and the inlet end is connected with the parallel outlet end of the safety system action switch 10;
the car top maintenance switch 14 and the car top operation switch 16 are connected in series, and the input end is connected with the series output end of the upper stop action switch 11, the lower stop action switch 12 and the guardrail extension switch 13;
the pit maintenance switch 15 and the pit operation switch 17 are connected in series, and the input end is connected with the series output end of the upper stop action switch 11, the lower stop action switch 12 and the guardrail extension switch 13;
the input end of the car top down switch 18 is connected with the serial output ends of the car top overhaul switch 14 and the car top running switch 16, and the output end of the car top down switch 18 is connected with the input end of the auxiliary lower limit switch 23;
the input end of the pit descending switch 19 is connected with the serial output ends of the pit overhauling switch 15 and the pit running switch 17, and the output end of the pit descending switch 19 is connected with the input end of the auxiliary lower limit switch 23;
the input end of the car top uplink switch 20 is connected with the serial output ends of the car top overhaul switch 14 and the car top running switch 16, and the output end of the car top uplink switch 20 is connected with the input end of the auxiliary upper limit switch 22;
the input end of the pit uplink switch 21 is connected with the serial output ends of the pit overhaul switch 15 and the pit operation switch 17, and the output end of the pit uplink switch 21 is connected with the input end of the auxiliary upper limit switch 22;
the outlet end of the auxiliary lower limit switch 22 and the outlet end of the auxiliary upper limit switch 23 are short-circuited at a first jack P1 and are used for connecting a main elevator safety loop;
the safety system action switch 10 is a normally open switch, and a safety system action switch 10 is arranged at the elevator landing door of each floor and is closed when triggered by a user;
the upper stop motion switch 11 is normally open in an initial state and is arranged beside the upper stop device, the upper stop device is provided with a reset position and an effective position, and after the upper stop device is arranged at the effective position, the upper stop motion switch 11 is closed;
the lower stop motion switch 12 is normally open in an initial state and is arranged beside the lower stop device, the lower stop device has two positions, namely a reset position and an effective position, and after the lower stop device is arranged at the effective position, the state of the lower stop motion switch 12 is changed into a closed state;
the guardrail extension switch 13 is normally open in the initial state and is arranged beside the car top guardrail, and when the car top guardrail rises, the guardrail extension switch 13 is closed;
the car top maintenance switch 14 is disconnected in the initial state, is arranged on the top side of the car, and is selected to be closed when a user selects pit maintenance operation;
the pit overhauling switch 15 is disconnected in the initial state, is installed on the side of the pit, and is selected to be closed when a user selects pit overhauling operation;
the car top running switch 16 is disconnected in the initial state, is installed on the top side of the car, and is selected to be closed when a user carries out car top maintenance operation;
the pit operation switch 17 is disconnected in the initial state, is installed on the pit side, and is selected to be closed when a user carries out pit overhauling operation;
the car top down switch 18 is initially disconnected and is arranged on the top side of the car, and when a user overhauls and runs downwards on the car top, the car top down switch 18 is selected to be closed;
the pit descending switch 19 is disconnected in the initial state, is installed on the side of the pit, and is selected to be closed when a user overhauls and downwards runs in the pit;
the car top uplink switch 20 is disconnected in the initial state, is installed on the top side of the car, and is selected to be closed when a user overhauls and upwards runs on the car top;
the pit ascending switch 21 is disconnected in the initial state, is installed on the side of the pit, and is selected to be closed when a user overhauls and upwards runs at the bottom of the car;
the auxiliary upper limit switch 22 is normally closed in an initial state, is installed in the hoistway, and is turned off when the elevator car rises to an upper limit position;
the auxiliary lower limit switch 23 is normally closed in an initial state, is installed in the hoistway, and is turned off when the elevator car descends to a lower limit position;
the automatic operation loop 4 comprises an upper stop reset switch 41, a lower stop reset switch 42, a toe guard board withdrawing switch 43, a guardrail withdrawing switch 44 and a plurality of safety system reset switches 40;
the plurality of safety system reset switches 40 are connected in series and have an input terminal connected with the working power supply V1;
the upper stop reset switch 41, the lower stop reset switch 42, the toe guard board retracting switch 43 and the guardrail retracting switch 44 are connected in series, the inlet end of each safety system reset switch 40 is connected with the serial outlet end of the safety system reset switches, and the outlet end of each safety system reset switch is connected with a first plug port P1 for connecting a main elevator safety loop;
the safety system reset switch 40 is a normally closed switch, and a safety system reset switch 40 is arranged at the elevator landing door of each floor and is disconnected when triggered by a user;
the upper stop reset switch 41 is normally open in an initial state and is arranged beside the upper stop device, and when the lift car moves upwards to enable the upper stop device to be arranged at a reset position, the upper stop reset switch 41 is closed;
the lower stop reset switch 42 is normally open in the initial state and is arranged beside the lower stop device, and when the lift car moves downwards to enable the lower stop device to be arranged at the reset position, the lower stop reset switch 42 is switched on;
the toe guard withdrawing switch 43 is normally open in the initial state, is arranged beside the telescopic toe guard, and is closed when the toe guard is retracted; the telescopic foot guard is arranged on the lower side of the lift car, and when rescue is carried out, the foot guard stretches to prevent passengers from falling into a well from a gap; when the device is in normal operation, the toe guard is folded.
The guardrail retraction switch 44 is normally open in the initial state and is mounted beside the extendable guardrail, and when the car top guardrail is retracted, the guardrail retraction switch 44 is closed.
In the additional elevator safety loop of the first embodiment, after the safety system action switch 10 acts (is closed), the maintenance operation can be performed only after the upper stop action switch 11, the lower stop action switch 12 and the guardrail extension switch 13 are all in place, and when the auxiliary lower limit switch 23 acts (is disconnected), the elevator can only be overhauled and operated upwards and cannot be overhauled and operated downwards, and when the auxiliary upper limit switch 22 acts (is disconnected), the elevator can only be overhauled and operated downwards and cannot be overhauled and operated upwards; when the safety system reset switch 40 is in a reset state, normal operation can be recovered only after the upper stop reset switch 41, the lower stop reset switch 42, the toe guard retraction switch 43 and the guardrail retraction switch 44 are all in place.
The additional elevator safety loop of the first embodiment can realize the action and reset functions of the elevator safety system only by being connected in series to the front stage of the original main elevator safety loop 7 without software participation, can realize various control functions described in the GB 28621 and 2012 standard, has little change on the original elevator, and can quickly reform the standard elevator into an additional elevator corresponding to the GB 28621 and 2012 standard.
Example two
Based on the additional elevator safety loop of the first embodiment, the overhaul operation loop 1 further comprises an upper stop indication switch 31 and a lower stop indication switch 32;
the upper stop indicating switch 31 and the upper stop indicating lamp 33 are connected in series between a control power supply V2 and the ground 00;
the lower stop indication switch 32 and the lower stop indication lamp 34 are connected in series between the control power supply V2 and the ground 00;
the upper stop indication switch 31, the switch state of which is consistent with the upper stop operation switch 11 and acts synchronously;
the lower stop indication switch 32, the switching state of which is consistent with the lower stop operation switch 12 and operates synchronously;
the upper stop indicator light 33 is positioned at the top of the hoistway;
the lower stop indicator light 34 is located at the bottom of the hoistway.
In the additional elevator safety circuit of the second embodiment, the indicator lamp at the top/bottom of the hoistway is turned on after the upper stop operation switch 11 and the lower stop operation switch 12 are operated.
EXAMPLE III
Based on the additional elevator safety loop of the second embodiment, the overhaul operation loop 1 further comprises a relay;
the coil SL of the relay is connected between the parallel output ends of the plurality of safety system operating switches 10 and the ground 00;
the first group of contacts S1 of the relay is connected between the control power supply V2 and the detection port P3;
the second set of contacts S2 of the relay is connected in the automatic operation circuit 4;
the first group of contacts S1 are normally open contacts and are switched on after the relay coil SL is powered on;
the second set of contacts S2 are normally closed contacts that open upon energization of relay coil SL to open autorun circuit 4.
In the third embodiment of the safety loop of the elevator, a relay is added in the maintenance operation loop 1, when the safety system action switch 10 is actuated (closed), the first group of contacts S1 of the relay is closed, the second group of contacts S2 of the relay is opened, the automatic operation loop 4 is cut off, the maintenance state signal is output and transmitted into the control system through the detection port P3, and the elevator can be maintained and operated only when the maintenance state signal is transmitted into the control system. The additional elevator safety loop of the third embodiment can redundantly block the automatic operation loop 4, an additional signal input interface is added, the control system can detect the working state of the elevator safety system, signal display is provided or automatic operation redundancy protection is added according to the working state of the elevator safety system, and the safety of the system is improved.
Example four
Based on the additional elevator safety loop of the third embodiment, the toe guard withdrawing switch 43 and the guardrail withdrawing switch 44 are directly connected in series, and the emergency electric switch 50 is connected in parallel at two ends after the series connection;
the emergency electric switch 50 is normally open in an initial state, is installed at a landing side, and is selectively closed when a user selects emergency electric operation.
Preferably, the safety system operation switch 10 is a selection switch;
the upper stop motion switch 11 is a position switch meeting the requirement of a safety contact;
the lower stop motion switch 12 is a position switch meeting the requirement of a safety contact;
the guardrail extension switch 13 is a position switch meeting the requirement of a safety contact;
the car top maintenance switch 14 is a selection switch meeting the requirement of a safety contact;
the pit maintenance switch 15 is a selection switch meeting the requirements of safety contacts;
the car top operation switch 16 is a self-resetting push switch;
the pit operation switch 17 is a self-resetting push switch;
the car roof down switch 18 is a self-resetting push switch;
the pit descending switch 19 is a self-resetting push switch;
the car top ascending switch 20 is a self-resetting push switch;
the pit ascending switch 21 is a self-resetting push switch;
the auxiliary upper limit switch 22 is a position switch meeting the requirement of a safety contact;
the auxiliary lower limit switch 23 is a position switch meeting the requirement of a safety contact;
the safety system reset switch 40 is a selection switch meeting the safety contact requirement;
the upper stop reset switch 41 is a position switch meeting the requirement of a safety contact;
the lower stop reset switch 42 is a position switch meeting the requirement of a safety contact;
the toe guard retraction switch 43 is a position switch meeting the requirements of safety contacts;
the guardrail extension switch 44 is a position switch meeting the requirement of a safety contact;
the emergency electric switch 50 is a selection switch meeting the requirement of a safety contact;
the upper stop indication switch 31 is a position switch meeting the requirement of a safety contact;
the lower stop indication switch 32 is a position switch satisfying the requirement of a safety contact.
EXAMPLE five
Based on the fourth embodiment, as shown in fig. 1, the elevator safety system includes the additional elevator safety circuit 1 and the main elevator safety circuit 7;
the main elevator safety loop 7 comprises a main change-over switch 71, an emergency electric operation switch 72, a manual operation switch 73, a main uplink maintenance limit switch 74, a main downlink maintenance limit switch 75, an uplink operation switch 76, a downlink operation switch 77 and a slave change-over switch 78;
the main change-over switch 71, the emergency electric operation switch 72 and the manual operation switch 73 are connected in series, and the input end of the main change-over switch is used for connecting a first socket P1;
the main uplink maintenance limit switch 74 and the uplink operation switch 76 are connected in series, and the input end is connected with the series output end of the main change-over switch 71, the emergency electric operation switch 72 and the manual operation switch 73;
the main downlink maintenance limit switch 75 and the downlink operation switch 77 are connected in series, and the input end is connected with the series output end of the main change-over switch 71, the emergency electric operation switch 72 and the manual operation switch 73;
the serial output ends of the main uplink maintenance limit switch 74 and the uplink operation switch 76 and the serial output ends of the main downlink maintenance limit switch 75 and the downlink operation switch 77 are connected with a second socket P2;
the two ends of the slave change-over switch 78 are respectively connected with a first socket P1 and a second socket P2;
the main change-over switch 71 is a normally open contact of the safety relay and is arranged in the control screen, when the emergency electric switch 50 is closed, the coil of the safety relay is electrified, and the main change-over switch 71 is switched on;
the emergency electric operation switch 72, the switching state of which is consistent with the emergency electric switch 50 and acts synchronously;
the manual operation switch 73 is in an off state in an initial state, is installed on the landing side, and is selected to be turned on when the user selects emergency electric operation;
the main up-line maintenance limit switch 74, the on-off state of which is consistent with the auxiliary upper limit switch 22 and acts synchronously;
the main downlink maintenance limit switch 75 has the same switching state as the auxiliary lower limit switch 23 and acts synchronously;
the uplink running switch 76 is disconnected in the initial state, is installed on the floor station side, and is selected to be closed when the user selects the emergency electric upward running;
the downlink running switch 77 is disconnected in the initial state, is installed on the landing side, and is selected to be closed when the user selects the emergency electric downward running;
the slave changeover switch 78, which is a normally closed contact of the safety relay, is installed in the control panel, and when the emergency electric switch 50 is closed, the safety relay coil is energized to be disconnected from the changeover switch 78.
Preferably, the main switch 71 is a normally open contact of a safety relay;
the slave change-over switch 78 is a normally closed contact of the safety relay;
the emergency electric operation switch 72 is a selection switch;
the manual operation switch 73 is a self-resetting push switch;
the main up-line maintenance limit switch 74 is a position switch;
the main downlink maintenance limit switch 75 is a position switch;
the uplink running switch 76 is a self-resetting push switch;
the down running switch 77 is a self-resetting push switch.
The above are merely preferred embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. An additional elevator safety circuit, characterized in that it comprises a service run circuit (1) and an automatic run circuit (4);
the maintenance operation loop (1) comprises an upper stop action switch (11), a lower stop action switch (12), a guardrail extension switch (13), a car top maintenance switch (14), a pit maintenance switch (15), a car top operation switch (16), a pit operation switch (17), a car top downlink switch (18), a pit downlink switch (19), a car top uplink switch (20), a pit uplink switch (21), an auxiliary upper limit switch (22), an auxiliary lower limit switch (23) and a plurality of safety system action switches (10);
a plurality of safety system action switches (10) are connected in parallel and the input end of each safety system action switch is connected with a working power supply (V1);
the upper stop motion switch (11), the lower stop motion switch (12) and the guardrail extension switch (13) are connected in series, and the inlet end of the upper stop motion switch is connected with the parallel outlet end of the safety system motion switch (10);
the car top maintenance switch (14) and the car top running switch (16) are connected in series, and the input end of the car top maintenance switch and the car top running switch is connected with the series output end of the upper stop action switch (11), the lower stop action switch (12) and the guardrail extension switch (13);
the pit maintenance switch (15) and the pit operation switch (17) are connected in series, and the input end of the pit maintenance switch and the pit operation switch is connected with the serial output end of the upper stop action switch (11), the lower stop action switch (12) and the guardrail extension switch (13);
the input end of the car top descending switch (18) is connected with the serial output ends of the car top maintenance switch (14) and the car top operation switch (16), and the output end of the car top descending switch (18) is connected with the input end of the auxiliary lower limit switch (23);
the input end of the pit descending switch (19) is connected with the serial output ends of the pit overhauling switch (15) and the pit running switch (17), and the output end of the pit descending switch (19) is connected with the input end of the auxiliary lower limit switch (23);
the input end of the car top ascending switch (20) is connected with the serial output ends of the car top overhauling switch (14) and the car top running switch (16), and the output end of the car top ascending switch (20) is connected with the input end of the auxiliary upper limit switch (22);
the input end of the pit ascending switch (21) is connected with the serial output ends of the pit overhauling switch (15) and the pit running switch (17), and the output end of the pit ascending switch (21) is connected with the input end of the auxiliary upper limit switch (22);
the outlet end of the auxiliary lower limit switch (22) and the outlet end of the auxiliary upper limit switch (23) are short-circuited at a first jack P1 and are used for connecting a main elevator safety loop;
the safety system action switch (10) is a normally open switch, and a safety system action switch (10) is arranged at the elevator landing door of each floor and is closed when triggered by a user;
the upper stop motion switch (11) is normally open in an initial state and is arranged beside the upper stop device, the upper stop device is provided with a reset position and an effective position, and after the upper stop device is arranged at the effective position, the upper stop motion switch (11) is closed;
the lower stop motion switch (12) is normally open in an initial state and is arranged beside the lower stop device, the lower stop device has two positions, namely a reset position and an effective position, and after the lower stop device is arranged at the effective position, the state of the lower stop motion switch (12) is changed into a closed state;
the guardrail extension switch (13) is normally open in the initial state and is arranged beside the car top guardrail, and when the car top guardrail rises, the guardrail extension switch (13) is closed;
the car top maintenance switch (14) is disconnected in the initial state and is arranged on the top side of the car, and when a user selects pit maintenance operation, the car top maintenance switch (14) is selected to be closed;
the pit overhauling switch (15) is disconnected in the initial state and is arranged on the side of the pit, and when a user selects pit overhauling operation, the pit overhauling switch (15) is selected to be closed;
the car top running switch (16) is disconnected in the initial state and is arranged on the top side of the car, and when a user carries out car top overhauling operation, the car top running switch (16) is selected to be closed;
the pit operation switch (17) is disconnected in the initial state and is arranged on the side of the pit, and when a user carries out pit overhauling operation, the pit operation switch (17) is selected to be closed;
the car top descending switch (18) is disconnected in the initial state, is arranged on the top side of the car, and is selected to be closed when a user overhauls and runs downwards on the car top;
the pit descending switch (19) is disconnected in the initial state and is arranged on the side of the pit, and when a user overhauls and runs downwards in the pit, the pit descending switch (19) is selected to be closed;
the car top ascending switch (20) is disconnected in the initial state, is arranged on the top side of the car, and is selected to be closed when a user overhauls and upwards runs on the car top;
the pit ascending switch (21) is disconnected in the initial state, is arranged on the side of the pit, and is selected to be closed when a user overhauls and upwards runs at the bottom of the car;
the auxiliary upper limit switch (22) is normally closed in an initial state, is arranged in the hoistway, and is turned off when the elevator car rises to an upper limit position;
the auxiliary lower limit switch (23) is normally closed in the initial state, is arranged in the hoistway, and is turned off when the elevator car descends to the lower limit position;
the automatic operation loop (4) comprises an upper stop reset switch (41), a lower stop reset switch (42), a toe guard retracting switch (43), a guardrail retracting switch (44) and a plurality of safety system reset switches (40);
a plurality of security system reset switches (40) connected in series and terminating in an operating power supply (V1);
the upper stop reset switch (41), the lower stop reset switch (42), the toe guard board retracting switch (43) and the guardrail retracting switch (44) are connected in series, the input end of the guardrail retracting switch is connected with the series output ends of the safety system reset switches (40), and the output end of the guardrail retracting switch is connected with a first plug port P1 for connecting a main elevator safety circuit;
the safety system reset switch (40) is a normally closed switch, and a safety system reset switch (40) is arranged at the elevator landing door of each floor and is disconnected when triggered by a user;
the upper stop reset switch (41) is normally open in an initial state and is arranged beside the upper stop device, and after the lift car moves upwards to enable the upper stop device to be placed at a reset position, the upper stop reset switch (41) is closed;
the lower stop reset switch (42) is normally open in the initial state and is arranged beside the lower stop device, and when the elevator car moves downwards to enable the lower stop device to be arranged at the reset position, the lower stop reset switch (42) is closed;
the toe guard retracting switch (43) is normally open in an initial state, is arranged beside the telescopic toe guard, and is closed when the toe guard retracts;
the guardrail retracting switch (44) is normally open in the initial state and is arranged beside the extensible guardrail, and when the car top guardrail retracts, the guardrail retracting switch (44) is closed.
2. Additional elevator safety circuit according to claim 1,
the overhaul operation loop (1) further comprises an upper stop indication switch (31) and a lower stop indication switch (32);
the upper stop indicating switch (31) and the upper stop indicating lamp (33) are connected in series between the control power supply (V2) and the ground;
the lower stop indication switch (32) and the lower stop indication lamp (34) are connected between the control power supply (V2) and the ground in series;
the upper stop indication switch (31) has a switching state consistent with that of the upper stop operation switch (11) and operates synchronously;
the lower stop indication switch (32) is in the same switch state as the lower stop operation switch (12) and operates synchronously;
the upper stop indicator lamp (33) is positioned at the top of the shaft;
the lower stop indicator light (34) is positioned at the bottom of the shaft.
3. Additional elevator safety circuit according to claim 2,
the overhaul operation loop (1) also comprises a relay;
the coil (SL) of the relay is connected between the parallel output ends of the safety system action switches (10) and the ground;
the first set of contacts (S1) of the relay is connected between a control power supply (V2) and a detection port (P3);
the second set of contacts (S2) of the relay is connected in the automatic operation loop (4);
the first group of contacts (S1) are normally open contacts and are switched on after the relay coil (SL) is electrified;
the second set of contacts (S2) are normally closed contacts that open upon energization of the relay coil (SL) to open the autorun circuit (4).
4. Additional elevator safety circuit according to claim 3,
the toe guard board withdrawing switch (43) and the guardrail withdrawing switch (44) are directly connected in series, and the two ends of the toe guard board withdrawing switch (43) after being connected in series are connected with the emergency electric switch (50) in parallel;
the emergency electric switch (50) is normally open in the initial state and is arranged on the side of the landing station, and when the user selects emergency electric operation, the emergency electric switch (50) is selected to be closed.
5. Additional elevator safety circuit according to claim 4,
the safety system action switch (10) is a selection switch;
the upper stop motion switch (11) is a position switch;
the lower stop motion switch (12) is a position switch;
the guardrail extension switch (13) is a position switch;
the car top maintenance switch (14) is a selection switch;
the pit maintenance switch (15) is a selection switch;
the car top running switch (16) is a self-resetting push switch;
the pit operation switch (17) is a self-resetting push switch;
the car roof descending switch (18) is a self-resetting push switch;
the pit descending switch (19) is a self-resetting push switch;
the car roof ascending switch (20) is a self-resetting push switch;
the pit ascending switch (21) is a self-resetting push switch;
the auxiliary upper limit switch (22) is a position switch;
the auxiliary lower limit switch (23) is a position switch;
the safety system reset switch (40) is a selection switch;
the upper stop reset switch (41) is a position switch;
the lower stop reset switch (42) is a position switch;
the toe guard retracting switch (43) is a position switch;
the guardrail extension switch (44) is a position switch;
the emergency electric switch (50) is a selection switch;
the upper stop indicating switch (31) is a position switch;
the lower stop indication switch (32) is a position switch.
6. An elevator safety system comprising the additional elevator safety circuit of claim 4, characterized in that the elevator safety system further comprises a main elevator safety circuit (7);
the main elevator safety loop (7) comprises a main change-over switch (71), an emergency electric operation switch (72), a manual operation switch (73), a main ascending maintenance limit switch (74), a main descending maintenance limit switch (75), an ascending operation switch (76), a descending operation switch (77) and a slave change-over switch (78);
the main change-over switch (71), the emergency electric operation switch (72) and the manual operation switch (73) are connected in series, and the input end of the main change-over switch is used for being connected with a first socket (P1);
the main uplink maintenance limit switch (74) and the uplink operation switch (76) are connected in series, and the input end of the main uplink maintenance limit switch is connected with the series output end of the main change-over switch (71), the emergency electric operation switch (72) and the manual operation switch (73);
the main downlink maintenance limit switch (75) and the downlink operation switch (77) are connected in series, and the input end of the main downlink maintenance limit switch is connected with the series output end of the main change-over switch (71), the emergency electric operation switch (72) and the manual operation switch (73);
the serial outlet ends of the main uplink maintenance limit switch (74) and the uplink operation switch (76) and the serial outlet ends of the main downlink maintenance limit switch (75) and the downlink operation switch (77) are connected with a second socket (P2);
the two ends of the slave switch (78) are respectively connected with a first socket (P1) and a second socket (P2);
the main switch (71) is a normally open contact of a safety relay and is arranged in the control screen, when the emergency electric switch (50) is closed, a coil of the safety relay is electrified, and the main switch (71) is switched on;
the emergency electric operation switch (72) has a switch state consistent with that of the emergency electric switch (50) and acts synchronously;
the manual operation switch (73) is in an off state in an initial state, is arranged on the side of the landing station, and is selected to be closed when the user selects emergency electric operation;
the main up-line maintenance limit switch (74) has the same switch state as the auxiliary upper limit switch (22) and acts synchronously;
the main downlink maintenance limit switch (75) is in the same switch state as the auxiliary lower limit switch (23) and synchronously acts;
the uplink running switch (76) is disconnected in the initial state, is arranged on the side of the floor station, and is selected to be closed when the user selects the emergency electric upward running;
the downlink running switch (77) is disconnected in the initial state, is arranged on the side of the landing station, and is selected to be closed when the user selects the emergency electric downward running;
the slave switch (78) is a normally closed contact of the safety relay and is arranged in the control screen, and when the emergency electric switch (50) is closed, the coil of the safety relay is electrified and is disconnected from the slave switch (78).
7. An elevator safety system as recited in claim 6,
the main switch (71) is a normally open contact of the safety relay;
the slave switch (78) is a normally closed contact of the safety relay;
the emergency electric operation switch (72) is a selection switch;
the manual operation switch (73) is a self-resetting press switch;
the main up-going maintenance limit switch (74) is a position switch;
the main downlink maintenance limit switch (75) is a position switch;
the uplink running switch (76) is a self-resetting push switch;
the downlink running switch (77) is a self-reset push switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811282360.XA CN111115401B (en) | 2018-10-31 | 2018-10-31 | Additional elevator safety loop and elevator safety system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811282360.XA CN111115401B (en) | 2018-10-31 | 2018-10-31 | Additional elevator safety loop and elevator safety system |
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| CN111115401B true CN111115401B (en) | 2021-05-25 |
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