CN111453581A - Early warning system and method for preventing falling into elevator shaft - Google Patents
Early warning system and method for preventing falling into elevator shaft Download PDFInfo
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- CN111453581A CN111453581A CN202010436948.7A CN202010436948A CN111453581A CN 111453581 A CN111453581 A CN 111453581A CN 202010436948 A CN202010436948 A CN 202010436948A CN 111453581 A CN111453581 A CN 111453581A
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- door lock
- early warning
- contact switch
- relay
- lock relay
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- 238000000034 method Methods 0.000 title claims description 19
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
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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
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/143—Control systems or devices electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
- B66B3/002—Indicators
- B66B3/004—Mechanical devices that can be illuminated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Elevator Door Apparatuses (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The early warning system for preventing the elevator from falling into the elevator shaft comprises a landing door lock relay, a normally closed contact switch corresponding to the landing door lock relay, a car door lock relay, a normally open contact switch corresponding to the car door lock relay, a time delay relay, an early warning device and a preset power supply; the normally closed contact switch, the normally open contact switch and the time delay relay are connected in series; the time delay relay, the early warning device and the preset power supply are connected in series. Under the normal running condition of the elevator, the normally closed contact switch and the normally open contact switch are always in reciprocal signals, and the time delay relay cannot be attracted; when the elevator car is not in the door opening area, and personnel forcibly open or destroy the landing door, because of the closed state of the car door, the car door lock relay is closed, then the normally open contact switch is also closed, and the landing door is released when being opened, then the normally closed contact switch is closed, so the time delay relay is electrified and the actuation is carried out, and the early warning device in the elevator well is opened at the moment, thereby starting the safety early warning effect.
Description
Technical Field
The invention relates to the field of elevators, in particular to an early warning system and an early warning method for preventing falling into an elevator hoistway.
Background
As the number of elevators increases, the frequency of elevator failures during use is increasing. If the elevator is out of order, a safety accident may be caused if the elevator is not operated properly. For example, when the landing doors and the car doors of the elevator cannot be opened normally, some unauthorized persons (such as property managers, security guards and the like) use triangular keys to illegally open the landing door switches of the elevator, or qualified elevator maintenance personnel open the landing doors when entering the hoistway, or even some passengers intentionally destroy the landing doors, and in these cases, accidents such as falling into the hoistway may occur.
For example, in 2017, 25 months and 8 months, the north-coastal region of Harbin city and the No. 26 building 3 unit elevator in city have faults, three elevators are trapped in the elevator, the elevator stops between 25 floors and 26 floors, the elevator is not moved to the door region position when a property worker rescues, the door of the elevator is forcibly opened by using a triangular key, and a man climbs out of the elevator, and carelessly falls into the elevator shaft from the gap of the elevator to die.
Disclosure of Invention
The invention provides an early warning system and method for preventing falling into an elevator shaft, and aims to solve the technical problem that no early warning signal exists when the existing elevator landing door and car door are opened abnormally.
In order to solve the technical problem, the invention provides an early warning system for preventing falling into an elevator shaft, wherein an elevator comprises more than two landing doors, a landing door lock relay, a car door and a car door lock relay;
the elevator shaft corresponds to more than two floors, each floor is respectively provided with one landing door and a landing door switch corresponding to the landing door, and each landing door switch is sequentially connected in series from top to bottom and then connected in series with the landing door lock relay to form a first circuit;
the car door is provided with a car door switch, and the car door switch is connected with the car door lock relay in series to form a second circuit;
the first circuit and the second circuit are connected in parallel or respectively connected with a driving power supply;
the early warning system comprises the landing door lock relay, a normally closed contact switch corresponding to the landing door lock relay, the car door lock relay, a normally open contact switch corresponding to the car door lock relay, a time delay relay, an early warning device and a preset power supply;
when the landing door lock relay is not electrified, the normally closed contact switch is closed; when the landing door lock relay is electrified, the normally closed contact switch is disconnected;
when the car door lock relay is not electrified, the normally open contact switch is disconnected; when the car door lock relay is electrified, the normally open contact switch is closed;
the normally closed contact switch, the normally open contact switch and the time delay relay are connected in series;
the time delay relay, the early warning device and the preset power supply are connected in series, and when the early warning device is powered on, the time delay relay, the early warning device and the preset power supply are used for sending out early warning signals.
Optionally, an illuminating lamp and an illuminating switch connected in series with the preset power supply are arranged in the elevator shaft;
and the branch where the delay relay and the early warning device are located is connected with the branch where the lighting switch is located in parallel and then is connected with the lighting lamp in series.
Optionally, the normally closed contact switch is a normally closed contact switch provided in the landing door lock relay or a newly added normally closed contact switch; the normally open contact switch is a normally open contact switch of the car door lock relay or a newly added normally open contact switch.
Optionally, the first line is connected in parallel with the second line.
Optionally, the early warning device comprises a flashlight and an alarm.
Optionally, the number of flash light with the number of alarm is a plurality of, and is a plurality of the flash light is a plurality of with a plurality of the alarm is followed the extending direction of elevator well evenly sets up on the elevator well.
Optionally, the branch where the delay relay is located is connected in series with a normally closed switch.
The invention also provides an early warning system for preventing the elevator from falling into the elevator shaft, wherein the elevator comprises more than two landing doors, landing door lock relays, car doors and car door lock relays;
the elevator shaft corresponds to more than two floors, each floor is respectively provided with one landing door and a landing door switch corresponding to the landing door, and each landing door switch is sequentially connected in series from top to bottom and then connected in series with the landing door lock relay to form a first circuit;
the car door is provided with a car door switch, and the car door switch is connected with the car door lock relay in series to form a second circuit;
the first circuit and the second circuit are connected in parallel or respectively connected with a driving power supply;
the early warning system comprises the landing door lock relay, a normally open contact switch corresponding to the landing door lock relay, the car door lock relay, a normally closed contact switch corresponding to the car door lock relay, a time delay relay, an early warning device and a preset power supply;
when the landing door lock relay is not electrified, the normally open contact switch is disconnected; when the landing door lock relay is electrified, the normally open contact switch is closed;
when the car door lock relay is not electrified, the normally closed contact switch is closed; when the car door lock relay is electrified, the normally closed contact switch is switched off;
the normally open contact switch, the normally closed contact switch and the time delay relay are connected in series;
the time delay relay, the early warning device and the preset power supply are connected in series, and when the early warning device is powered on, the time delay relay, the early warning device and the preset power supply are used for sending out early warning signals.
The invention also provides an early warning method for preventing the elevator from falling into the elevator shaft, which comprises the following steps:
s1: acquiring the current state of a landing door lock relay, and judging whether the landing door lock relay is in an attraction state or a release state;
s2: the method comprises the steps of obtaining the current state of a car door lock relay, and judging whether the car door lock relay is in an attraction state or a release state;
s3: and if the landing door lock relay is in a release state and the car door lock relay is in an attraction state, or the landing door lock relay is in an attraction state and the car door lock relay is in a release state, starting an early warning device to perform safety early warning.
According to the early warning system and the early warning method for preventing the landing door and the car door from falling into the elevator shaft, when the elevator normally runs, the landing door and the car door are closed or opened simultaneously, so that the landing door lock relay and the car door lock relay are attracted or released simultaneously, further, the normally closed contact switch corresponding to the landing door lock relay and the normally open contact switch corresponding to the car door lock relay are always mutual reverse signals, and the normally open contact switch corresponding to the landing door lock relay and the normally closed contact switch corresponding to the car door lock relay are also always mutual reverse signals, so that the time delay relay cannot be attracted under the condition that the elevator normally runs; when the elevator car is not in the door opening area and a person forcibly opens or destroys the landing door, because the car door is in a closed state, the car door lock relay is closed, the normally open contact switch is also closed, and when the landing door is opened, the landing door lock relay is released, the normally closed contact switch is closed, so that the time delay relay is electrified and closed, and at the moment, the early warning device in the elevator shaft is opened, thereby starting the safety early warning function; or, personnel force to open or destroy the sedan-chair door when the layer door is the closed condition, because of the sedan-chair door is the open condition, sedan-chair door lock relay release, then the normally closed contact switch that sedan-chair door lock relay corresponds is closed, and layer door lock relay actuation when the layer door is closed, then normally open contact switch that layer door lock relay corresponds is closed, therefore time delay relay will get the electricity and the actuation, early warning device in the elevator well this moment is opened to open the safety precaution. In addition, the delay relay can prevent the delay relay from generating misoperation due to incomplete synchronization (namely delay) of opening and closing between the landing door and the car door when the elevator normally opens and closes the door.
Drawings
Fig. 1 is an electrical schematic diagram of an early warning system for preventing a car from falling into an elevator hoistway according to an embodiment of the present invention;
FIG. 2 is an electrical schematic diagram of a prior art elevator landing door lock relay and car door lock relay;
fig. 3 is an electrical schematic diagram of an elevator landing door lock relay and a car door lock relay according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a landing door lock relay and a corresponding normally closed contact switch thereof according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a car door lock relay and a corresponding normally open contact switch thereof according to an embodiment of the present invention;
fig. 6 is an electrical schematic diagram of a delay relay, a normally closed contact switch corresponding to a landing door lock relay, and a normally open contact switch corresponding to a car door lock relay according to an embodiment of the present invention;
fig. 7 is an electrical schematic diagram of an early warning system for preventing a fall into an elevator hoistway according to an embodiment of the present invention;
fig. 8 is a flowchart of an early warning method for preventing falling into an elevator shaft according to an embodiment of the present invention.
[ reference numerals are described below ]:
the system comprises a 1-layer door lock relay, a 2-layer door lock relay, a 3-car door lock relay, a 4-car door lock relay, a corresponding normally open contact switch, a 5-time delay relay, a 6-early warning device, a 7-preset power supply, an 8-illuminating lamp, a 9-illuminating switch, a 10-normally closed switch, a 61-flashlight and a 62-alarm.
Detailed Description
To make the objects, advantages and features of the present invention clearer, a warning system and method for preventing falling into an elevator shaft according to the present invention will be described in further detail with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Referring to fig. 1 to 6, the invention provides an early warning system for preventing falling into an elevator shaft, wherein the elevator comprises more than two landing doors, a landing door lock relay 1, a car door and a car door lock relay 3; the elevator shaft corresponds to more than two floors, each floor is respectively provided with one landing door and a landing door switch corresponding to the landing door, and each landing door switch is sequentially connected in series from top to bottom and then connected in series with the landing door lock relay 1 to form a first circuit; the car door is provided with a car door switch, and the car door switch is connected with the car door lock relay 3 in series to form a second circuit; the first circuit and the second circuit are connected in parallel or respectively connected with a driving power supply; the early warning system comprises the landing door lock relay 1, a normally closed contact switch 2 corresponding to the landing door lock relay, a car door lock relay 3, a normally open contact switch 4 corresponding to the car door lock relay, a time delay relay 5, an early warning device 6 and a preset power supply 7; when the landing door lock relay 1 is not electrified, the normally closed contact switch 2 is closed; when the landing door lock relay 1 is electrified, the normally closed contact switch 2 is switched off; when the car door lock relay 3 is not electrified, the normally open contact switch 4 is switched off; when the car door lock relay 3 is electrified, the normally open contact switch 4 is closed; the normally closed contact switch 2, the normally open contact switch 4 and the time delay relay 5 are connected in series; the time delay relay 5, the early warning device 6 and the preset power supply 7 are connected in series, and when the early warning device 6 is powered on, the time delay relay is used for sending out an early warning signal.
Referring to fig. 3, during normal operation of the elevator, the landing door and the car door are both closed or opened simultaneously, and when the car door switch Kjm is closed, the car door lock relay 3 is closed, and the car door is closed; when the car door switch Kjm is turned off, the car door lock relay 3 is released, and the car door is opened; the car door drives the landing door to be correspondingly opened and closed through the linkage structure in the opening and closing processes, and a delay of a few tenths of a second generally exists in the linkage process; when the elevator runs, the car door switch Kjm, the landing door switches K1, K2, … … and Kn are all closed, and the landing door lock relay 1 and the car door lock relay 3 are both attracted; when the elevator is opened at a floor, the car door switch Kjm and the floor door switch at the floor are disconnected, and both the floor door lock relay 1 and the car door lock relay 3 are released. When the car door is not in a normal door opening area, if the landing door or the car door is forcibly opened, the early warning system for preventing the car door from falling into the elevator shaft can be used for carrying out safety early warning.
According to the early warning system for preventing the landing door from falling into the elevator shaft, when the elevator runs normally, as shown in a figure 3, a landing door and a car door are closed or opened simultaneously, so that a landing door lock relay 1 and a car door lock relay 3 are powered on or powered off simultaneously, namely, the landing door lock relay 1 and the car door lock relay 3 are attracted or released simultaneously, and then a normally closed contact switch 2 corresponding to the landing door lock relay and a normally open contact switch 4 corresponding to the car door lock relay are always in mutual reverse signals, so that a time delay relay 5 cannot be attracted under the condition that the elevator runs normally; when the elevator car is not in the door opening area, referring to fig. 1 and 6, and a person forcibly opens or destroys the landing door, since the car door is in a closed state, the car door lock relay 3 is closed, the normally open contact switch 4 is also closed, and when the landing door is opened, the landing door lock relay 1 is released, the normally closed contact switch 2 is closed, so that the delay relay 5 is powered on to be attracted, and at the moment, the early warning device 6 in the elevator shaft is opened, thereby starting the safety early warning effect. In addition, the delay relay 5 can prevent the delay relay 5 from generating misoperation due to incomplete synchronization (namely delay) of opening and closing between the landing door and the car door when the elevator normally opens and closes the door.
Optionally, as shown in fig. 1, an illumination lamp 8 and an illumination switch 9 connected in series with the preset power supply 7 are arranged in the elevator shaft; the branch where the delay relay 5 and the early warning device 6 are located is connected in parallel with the branch where the lighting switch 9 is located, and then is connected in series with the lighting lamp 8.
In this embodiment, predetermine power 7, light 8 and lighting switch 9 and be the original circuit in the elevator well, increase delay relay 5 in original circuit with early warning device 6, the part in the dotted line frame in fig. 1 is newly-increased part promptly, can reduce like this and build early warning system's cost to can make light 8 and early warning device 6 start simultaneously. The light switch 9 is normally open and the light switch 9 can be closed manually when access to the elevator shaft is required for service.
Optionally, as shown in fig. 4, the normally closed contact switch 2 is a normally closed contact switch provided in the landing door lock relay 1 itself or a newly added normally closed contact switch; the normally open contact switch 4 is a normally open contact switch or a newly added normally open contact switch of the car door lock relay 3. The common layer door lock relay 1 is provided with a plurality of groups of normally closed contact switches 2, and when the normally closed contact switches 2 are spare, the normally closed contact switches 2 can be used; when the normally closed contact switch 2 is not left, a pair of normally closed contact switches 2 may be added to the landing door lock relay 1 as shown in fig. 4. As shown in fig. 5, a common car door lock relay 3 is provided with multiple groups of normally open contact switches 4, and when the normally open contact switches 4 are spare, the normally open contact switches 4 provided by the car door lock relay can be used; when the normally open contact switch 4 is not left, a pair of normally open contact switches 4 can be added to the car door lock relay 3 as shown in fig. 5.
Optionally, as shown in fig. 3, the first line is connected in parallel with the second line. As shown in fig. 1 and 3, the first line includes landing door switches K1, K2, … …, Kn and a landing door lock relay 1; the second line includes a door switch Kjm, and a door lock relay 3. When the arrangement is carried out, when more than one layer door switch among the layer door switches K1, K2, … … and Kn is forcibly opened, the car door lock relay 3 is not powered off and continues to be attracted, so that the delay relay 5 is attracted, and the early warning device 6 is started; in addition, the first line is connected in parallel with the second line, which can simplify circuit wiring. If the circuit structure shown in fig. 2 is used, the normally closed contact switch 2 and the normally open contact switch 4 are always in a reciprocal signal, the time delay relay 5 will be in a release state all the time, and the early warning device 6 will not be turned on. Optionally, as shown in fig. 1, the warning device 6 includes a flashlight 61 and an alarm 62. The alarm can be given out through the flash lamp and the alarm at the same time, so that the alarm effect can be improved.
Optionally, the number of flash light with the number of alarm is a plurality of, and is a plurality of the flash light is a plurality of with a plurality of the alarm is followed the extending direction of elevator well evenly sets up on the elevator well. For example, the top, the middle and the bottom of the elevator shaft are provided with the flash lamps and the alarm, so that when the elevator breaks down, the landing door can be opened on any floor to see and hear safety early warning.
Optionally, as shown in fig. 7, the branch where the delay relay 5 is located is connected in series with a normally closed switch 10. After qualified elevator maintenance personnel obtain safety early warning, the preset power supply 7 of the early warning device 6 can be disconnected through the normally closed switch, so that the elevator maintenance personnel are not interfered by warning signals in the maintenance process.
Based on the same technical concept as the early warning system for preventing falling into the elevator shaft, the invention also provides the early warning system for preventing falling into the elevator shaft, wherein the elevator comprises more than two landing doors, a landing door lock relay, a car door and a car door lock relay; the elevator shaft corresponds to more than two floors, each floor is respectively provided with one landing door and a landing door switch corresponding to the landing door, and each landing door switch is sequentially connected in series from top to bottom and then connected in series with the landing door lock relay to form a first circuit; the car door is provided with a car door switch, and the car door switch is connected with the car door lock relay in series to form a second circuit; the first circuit and the second circuit are connected in parallel or respectively connected with a driving power supply; the early warning system comprises the landing door lock relay, a normally open contact switch corresponding to the landing door lock relay, the car door lock relay, a normally closed contact switch corresponding to the car door lock relay, a time delay relay, an early warning device and a preset power supply; when the landing door lock relay is not electrified, the normally open contact switch is disconnected; when the landing door lock relay is electrified, the normally open contact switch is closed; when the car door lock relay is not electrified, the normally closed contact switch is closed; when the car door lock relay is electrified, the normally closed contact switch is switched off; the normally open contact switch, the normally closed contact switch and the time delay relay are connected in series; the time delay relay, the early warning device and the preset power supply are connected in series, and when the early warning device is powered on, the time delay relay, the early warning device and the preset power supply are used for sending out early warning signals. Referring to fig. 6, the normally open contact switch corresponding to the landing door lock relay of the present embodiment corresponds to 4 in fig. 6, and the normally closed contact switch corresponding to the car door lock relay corresponds to 2 in fig. 6.
According to the early warning system for preventing the landing door and the car door from falling into the elevator shaft, when the elevator normally runs, the landing door and the car door are closed or opened simultaneously, so that the landing door lock relay and the car door lock relay are attracted or released simultaneously, further, the normally open contact switch corresponding to the landing door lock relay and the normally closed contact switch corresponding to the car door lock relay are always in mutual reverse signals, and therefore the time delay relay cannot be attracted under the condition that the elevator normally runs; personnel are forced to open or destroy the sedan-chair door when the layer door is the closed condition, because of the sedan-chair door is the open condition, sedan-chair door lock relay release, then the normally closed contact switch that sedan-chair door lock relay corresponds is closed, and layer door lock relay actuation when the layer door is closed, then the normally open contact switch that layer door lock relay corresponds is closed, therefore time delay relay will be electrified and the actuation, early warning device in the elevator well this moment is opened to open the safety precaution effect.
Based on the same technical concept as the early warning system for preventing falling into the elevator shaft, the invention also provides an early warning method for preventing falling into the elevator shaft, as shown in fig. 8, the early warning method comprises the following steps:
s1: acquiring the current state of a landing door lock relay, and judging whether the landing door lock relay is in an attraction state or a release state;
s2: the method comprises the steps of obtaining the current state of a car door lock relay, and judging whether the car door lock relay is in an attraction state or a release state;
s3: and if the landing door lock relay is in a release state and the car door lock relay is in an attraction state, or the landing door lock relay is in an attraction state and the car door lock relay is in a release state, starting an early warning device to perform safety early warning.
Wherein, the order of steps S1 and S2 may be reversed or performed simultaneously.
According to the early warning method for preventing the landing door and the car door from falling into the elevator shaft, when the elevator normally runs, the landing door and the car door are closed or opened simultaneously, so that the landing door lock relay and the car door lock relay are attracted or released simultaneously, further, the normally closed contact switch corresponding to the landing door lock relay and the normally open contact switch corresponding to the car door lock relay are always mutual reverse signals, and the normally open contact switch corresponding to the landing door lock relay and the normally closed contact switch corresponding to the car door lock relay are also always mutual reverse signals, so that the delay relay cannot be attracted under the condition that the elevator normally runs; when the elevator car is not in the door opening area and a person forcibly opens or destroys the landing door, because the car door is in a closed state, the car door lock relay is closed, the normally open contact switch is also closed, and when the landing door is opened, the landing door lock relay is released, the normally closed contact switch is closed, so that the time delay relay is electrified and closed, and at the moment, the early warning device in the elevator shaft is opened, thereby starting the safety early warning function; or, personnel force to open or destroy the sedan-chair door when the layer door is the closed condition, because of the sedan-chair door is the open condition, sedan-chair door lock relay release, then the normally closed contact switch that sedan-chair door lock relay corresponds is closed, and layer door lock relay actuation when the layer door is closed, then normally open contact switch that layer door lock relay corresponds is closed, therefore time delay relay will get the electricity and the actuation, early warning device in the elevator well this moment is opened to open the safety precaution.
In summary, according to the early warning system and the early warning method for preventing the landing door and the car door from falling into the elevator shaft provided by the invention, when the elevator normally runs, the landing door and the car door are both closed or opened simultaneously, so that the landing door lock relay and the car door lock relay are both sucked or released simultaneously, further, the normally closed contact switch corresponding to the landing door lock relay and the normally open contact switch corresponding to the car door lock relay are always mutual reverse signals, and the normally open contact switch corresponding to the landing door lock relay and the normally closed contact switch corresponding to the car door lock relay are also always mutual reverse signals, so that the delay relay cannot be sucked under the condition that the elevator normally runs; when the elevator car is not in the door opening area and a person forcibly opens or destroys the landing door, because the car door is in a closed state, the car door lock relay is closed, the normally open contact switch is also closed, and when the landing door is opened, the landing door lock relay is released, the normally closed contact switch is closed, so that the time delay relay is electrified and closed, and at the moment, the early warning device in the elevator shaft is opened, thereby starting the safety early warning function; or, personnel force to open or destroy the sedan-chair door when the layer door is the closed condition, because of the sedan-chair door is the open condition, sedan-chair door lock relay release, then the normally closed contact switch that sedan-chair door lock relay corresponds is closed, and layer door lock relay actuation when the layer door is closed, then normally open contact switch that layer door lock relay corresponds is closed, therefore time delay relay will get the electricity and the actuation, early warning device in the elevator well this moment is opened to open the safety precaution. In addition, the delay relay can prevent the delay relay from generating misoperation due to incomplete synchronization (namely delay) of opening and closing between the landing door and the car door when the elevator normally opens and closes the door.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the claims of the present invention.
Claims (9)
1. An early warning system for preventing falling into an elevator shaft is characterized in that an elevator comprises more than two landing doors, landing door lock relays, car doors and car door lock relays;
the elevator shaft corresponds to more than two floors, each floor is respectively provided with one landing door and a landing door switch corresponding to the landing door, and each landing door switch is sequentially connected in series from top to bottom and then connected in series with the landing door lock relay to form a first circuit;
the car door is provided with a car door switch, and the car door switch is connected with the car door lock relay in series to form a second circuit;
the first circuit and the second circuit are connected in parallel or respectively connected with a driving power supply;
the early warning system comprises the landing door lock relay, a normally closed contact switch corresponding to the landing door lock relay, the car door lock relay, a normally open contact switch corresponding to the car door lock relay, a time delay relay, an early warning device and a preset power supply;
when the landing door lock relay is not electrified, the normally closed contact switch is closed; when the landing door lock relay is electrified, the normally closed contact switch is disconnected;
when the car door lock relay is not electrified, the normally open contact switch is disconnected; when the car door lock relay is electrified, the normally open contact switch is closed;
the normally closed contact switch, the normally open contact switch and the time delay relay are connected in series;
the time delay relay, the early warning device and the preset power supply are connected in series, and when the early warning device is powered on, the time delay relay, the early warning device and the preset power supply are used for sending out early warning signals.
2. The early warning system for preventing the elevator shaft from falling into the elevator shaft according to claim 1, wherein an illuminating lamp and an illuminating switch which are connected with the preset power supply in series are arranged in the elevator shaft;
and the branch where the delay relay and the early warning device are located is connected with the branch where the lighting switch is located in parallel and then is connected with the lighting lamp in series.
3. The early warning system for preventing the elevator shaft from falling into the elevator shaft according to claim 1, wherein the normally closed contact switch is a normally closed contact switch of the landing door lock relay or a newly added normally closed contact switch; the normally open contact switch is a normally open contact switch of the car door lock relay or a newly added normally open contact switch.
4. A warning system for preventing a crash into an elevator hoistway as set forth in claim 1, wherein said first line is connected in parallel with said second line.
5. A warning system for preventing a crash into an elevator hoistway as set forth in claim 1 wherein said warning means comprises a flashing light and an alarm.
6. The early warning system for preventing the elevator shaft from falling into the elevator shaft according to claim 5, wherein the number of the flash lamps and the number of the alarm devices are both multiple, and the multiple flash lamps and the multiple alarm devices are uniformly arranged on the elevator shaft along the extension direction of the elevator shaft.
7. The early warning system for preventing the elevator shaft from falling into the elevator shaft as claimed in claim 1, wherein the branch where the time delay relay is located is connected in series with a normally closed switch.
8. An early warning system for preventing falling into an elevator shaft is characterized in that an elevator comprises more than two landing doors, landing door lock relays, car doors and car door lock relays;
the elevator shaft corresponds to more than two floors, each floor is respectively provided with one landing door and a landing door switch corresponding to the landing door, and each landing door switch is sequentially connected in series from top to bottom and then connected in series with the landing door lock relay to form a first circuit;
the car door is provided with a car door switch, and the car door switch is connected with the car door lock relay in series to form a second circuit;
the first circuit and the second circuit are connected in parallel or respectively connected with a driving power supply;
the early warning system comprises the landing door lock relay, a normally open contact switch corresponding to the landing door lock relay, the car door lock relay, a normally closed contact switch corresponding to the car door lock relay, a time delay relay, an early warning device and a preset power supply;
when the landing door lock relay is not electrified, the normally open contact switch is disconnected; when the landing door lock relay is electrified, the normally open contact switch is closed;
when the car door lock relay is not electrified, the normally closed contact switch is closed; when the car door lock relay is electrified, the normally closed contact switch is switched off;
the normally open contact switch, the normally closed contact switch and the time delay relay are connected in series;
the time delay relay, the early warning device and the preset power supply are connected in series, and when the early warning device is powered on, the time delay relay, the early warning device and the preset power supply are used for sending out early warning signals.
9. An early warning method for preventing falling into an elevator shaft is characterized by comprising the following steps:
s1: acquiring the current state of a landing door lock relay, and judging whether the landing door lock relay is in an attraction state or a release state;
s2: the method comprises the steps of obtaining the current state of a car door lock relay, and judging whether the car door lock relay is in an attraction state or a release state;
s3: and if the landing door lock relay is in a release state and the car door lock relay is in an attraction state, or the landing door lock relay is in an attraction state and the car door lock relay is in a release state, starting an early warning device to perform safety early warning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010436948.7A CN111453581A (en) | 2020-05-21 | 2020-05-21 | Early warning system and method for preventing falling into elevator shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010436948.7A CN111453581A (en) | 2020-05-21 | 2020-05-21 | Early warning system and method for preventing falling into elevator shaft |
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| CN111453581A true CN111453581A (en) | 2020-07-28 |
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| CN2568609Y (en) * | 2002-07-29 | 2003-08-27 | 张广兴 | Anti-faling, anti-shearing elevator door safety lock |
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