CN212425044U - Early warning system for preventing elevator shaft from falling into - Google Patents
Early warning system for preventing elevator shaft from falling into Download PDFInfo
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- CN212425044U CN212425044U CN202020865386.3U CN202020865386U CN212425044U CN 212425044 U CN212425044 U CN 212425044U CN 202020865386 U CN202020865386 U CN 202020865386U CN 212425044 U CN212425044 U CN 212425044U
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Abstract
The early warning system for preventing 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 the car door is in a closed state, the car door lock relay is closed, the opening 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 the elevator is sucked, and at the moment, the early warning device in the elevator shaft is opened, thereby starting the safety early warning function.
Description
Technical Field
The utility model relates to an elevator field, in particular to early warning system of elevator well is fallen into in prevention.
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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a prevention falls into early warning system of elevator well to solve current elevator layer door and sedan-chair door and do not have early warning signal's technical problem when opened unusually.
In order to solve the technical problem, the utility model provides an early warning system for preventing falling into an 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 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 utility model also provides an early warning system for preventing 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 utility model provides a prevent falling into early warning system of elevator well, in the normal operating process of elevator, layer door and sedan-chair door are all closed simultaneously or are opened simultaneously, so layer door lock relay and sedan-chair door lock relay all attract simultaneously or release simultaneously, and then the normally closed contact switch that layer door lock relay corresponds and the normally open contact switch that sedan-chair door lock relay corresponds always are reciprocal signals, and the normally open contact switch that layer door lock relay corresponds and the normally closed contact switch that sedan-chair door lock relay corresponds also always are reciprocal signals, therefore the time delay relay can not attract under the elevator normal operating condition; 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 falling into an elevator shaft 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 normally closed contact switch corresponding to the landing door lock relay 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 according to an embodiment of the present invention;
fig. 6 is an electrical schematic diagram of a normally closed contact switch corresponding to the delay relay, the landing door lock relay, and a normally open contact switch corresponding to the 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 falling into an elevator shaft 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
For making the purpose, advantages and features of the present invention clearer, the following description is made in conjunction with the accompanying drawings for further details of the early warning system for preventing falling into the elevator shaft. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
Referring to fig. 1-6, the present 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 sedan-chair door is not in the normal region of opening the door, if force open layer door or sedan-chair door, can use this moment the utility model provides a pair of early warning system that prevention fell into elevator well carries out safety precaution.
The utility model provides a prevent falling into early warning system of elevator well, in the normal operating process of elevator, refer to fig. 3 and show, layer door and sedan-chair door are all closed simultaneously or are opened simultaneously, so layer door lock relay 1 and sedan-chair door lock relay 3 are circular telegram or outage simultaneously, namely layer door lock relay 1 and sedan-chair door lock relay 3 are actuation simultaneously or release simultaneously, and then normally closed contact switch 2 that layer door lock relay corresponds and normally open contact switch 4 that sedan-chair door lock relay corresponds are the reciprocal signal always, therefore delay relay 5 can not actuation under the normal operating condition of elevator; 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 utility model also provides an early warning system for preventing 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. 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.
The utility model provides a prevent falling into early warning system of elevator well, in the normal operating process of elevator, layer door and sedan-chair door are all closed simultaneously or are opened simultaneously, so layer door lock relay and sedan-chair door lock relay all attract simultaneously or release simultaneously, and then the normally open contact switch that layer door lock relay corresponds and the normally closed contact switch that sedan-chair door lock relay corresponds always are reciprocal signals, therefore the time delay relay can not attract under the normal operating condition of elevator; 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 with the early warning system of above-mentioned prevention fall into elevator well, the utility model also provides an early warning method of prevention fall into elevator well, as shown in fig. 8, the early warning method includes:
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.
The utility model provides a prevent falling into elevator well's early warning method, in the normal operating process of elevator, layer door and sedan-chair door are all closed simultaneously or are opened simultaneously, so layer door lock relay and sedan-chair door lock relay all attract simultaneously or release simultaneously, and then the normally closed contact switch that layer door lock relay corresponds and the normally open contact switch that sedan-chair door lock relay corresponds always are reciprocal signals, and the normally open contact switch that layer door lock relay corresponds and the normally closed contact switch that sedan-chair door lock relay corresponds also always are reciprocal signals, therefore the time delay relay can not attract under the elevator normal operating condition; 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.
To sum up, the utility model provides a prevent falling into early warning system of elevator well, in the normal operating process of elevator, layer door and sedan-chair door are all closed simultaneously or are opened simultaneously, so layer door lock relay and sedan-chair door lock relay all are actuation simultaneously or release simultaneously, and then layer door lock relay's corresponding normally closed contact switch and sedan-chair door lock relay's corresponding normally open contact switch always are reciprocal signal, and layer door lock relay's corresponding normally open contact switch and sedan-chair door lock relay's corresponding normally closed contact switch also always are reciprocal signal, therefore the time delay relay can not actuation under the normal operating condition of elevator; 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 (8)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020865386.3U CN212425044U (en) | 2020-05-21 | 2020-05-21 | Early warning system for preventing elevator shaft from falling into |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020865386.3U CN212425044U (en) | 2020-05-21 | 2020-05-21 | Early warning system for preventing elevator shaft from falling into |
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| CN212425044U true CN212425044U (en) | 2021-01-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111453581A (en) * | 2020-05-21 | 2020-07-28 | 上海市特种设备监督检验技术研究院 | Early warning system and method for preventing falling into elevator shaft |
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2020
- 2020-05-21 CN CN202020865386.3U patent/CN212425044U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111453581A (en) * | 2020-05-21 | 2020-07-28 | 上海市特种设备监督检验技术研究院 | Early warning system and method for preventing falling into elevator shaft |
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