CN112408138A - Safety protection device of shallow pit elevator - Google Patents
Safety protection device of shallow pit elevator Download PDFInfo
- Publication number
- CN112408138A CN112408138A CN202011430765.0A CN202011430765A CN112408138A CN 112408138 A CN112408138 A CN 112408138A CN 202011430765 A CN202011430765 A CN 202011430765A CN 112408138 A CN112408138 A CN 112408138A
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- Prior art keywords
- elevator
- limiting
- pit
- detection device
- door
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
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- 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
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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
- B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
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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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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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
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a safety protection device of a shallow pit elevator.A bottom layer hoistway door is arranged on the hoistway wall of an elevator hoistway; the door opening detection device is used for detecting the opening and closing state of the bottom door; when the bottom-layer hall door is in an open state, the door opening detection device outputs a first trigger signal; the limiting assembly is used for limiting the elevator car from entering the pit; the limiting assembly is provided with a limiting position and a non-limiting position; the position detection device is used for detecting the position of the limiting assembly; when the limiting assembly is located at the limiting position, the position detection device outputs a second trigger signal; the speed limiter comprises an actuating mechanism and a controller; the actuating mechanism has an action state and a reset state; the controller is used for receiving at least one of the first trigger signal and the second trigger signal and controlling the actuating mechanism to be in the action state. The invention can thoroughly eliminate the safety risk caused by the factors such as accidental movement of the elevator car and the like to the related personnel entering the shallow pit, and improve the safety factor of the elevator in maintenance.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to a safety protection device of a shallow pit elevator.
Background
The elevator is used as a main vertical transportation tool, and brings great convenience for people to get in and out of high-rise buildings. Protection of related personnel during use, maintenance and rescue of various elevators has been regarded by relevant standards makers and elevator designers. . For a conventional elevator, it is safe when a related person opens a first floor landing door of the elevator by using a triangular key, presses an emergency stop button, and then enters a pit for related operation. This is because in a typical conventional elevator, the pit has reserved sufficient safety space. However, in the case of a shallow pit elevator, the above-described operation of entering the pit does not directly mechanically brake the elevator car although the operation of the elevator car is interrupted in advance. Meanwhile, the pit does not form a complete safety space before the mechanical stopping device of the shallow pit elevator acts. For a shallow pit elevator, the operation of entering the pit can not prevent the car from moving accidentally, and risks are brought to the safety of related personnel.
At present, for a shallow pit elevator, safety protection measures during the process that related personnel enter the pit are roughly divided into two types. A safety protection system is composed of an electric safety device composed of an electric safety detection switch and the like installed on a landing door of an elevator leading to a pit and an automatically operated movable stop device installed on the pit. When the relevant personnel open the landing door leading to the pit by using a key, the electric safety device is automatically triggered to interrupt the running of the cage and the movable stopping device is automatically operated to ensure the safety space of the pit. Although the safety protection measure can effectively protect the safety of related personnel entering the pit, the cost is high, the process is complex, and the safety protection measure is rarely adopted at present. The other is a safety protection system composed of an electric safety device composed of an electric safety detection switch and the like installed on a hall door leading to a pit and a manually operated movable stop device installed on the pit. When the relevant person opens the landing door to the pit by using a key, the electric safety device is automatically triggered to interrupt the running of the cage, and then the relevant person enters the pit and manually operates the movable stopping device. Although the safety protection measure is simple in structure and easy to realize, when relevant personnel enter a pit to operate the movable stopping device, the safety space of the pit is not completely formed, meanwhile, more direct mechanical braking (operation of the elevator car through indirect mechanical braking of the tractor brake) is not carried out on the elevator car, and the safety risk of the elevator car to the relevant personnel caused by accidental movement is not thoroughly eliminated.
Disclosure of Invention
In view of the above technical problems, the present invention aims to: the safety protection device of the shallow pit elevator can thoroughly eliminate safety risks caused by factors such as accidental movement of an elevator car and the like to related personnel entering a shallow pit, and improves the safety factor of the elevator during maintenance.
The technical solution of the invention is realized as follows: a safety protection device of a shallow pit elevator comprises an elevator shaft, an elevator car arranged in the elevator shaft and a speed limiter connected with the elevator car through a speed limiting cable; a pit is arranged at the bottom of the elevator shaft; a bottom layer hoistway door for entering and exiting the pit is arranged on the hoistway wall of the elevator hoistway; the safety protection device comprises a door opening detection device, a limiting assembly and a position detection device;
the door opening detection device is arranged on the bottom layer hall door and used for detecting the opening and closing state of the bottom layer door; when the bottom layer hall door is in an open state, the door opening detection device outputs a first trigger signal;
the limiting assembly is arranged in the pit and used for limiting the elevator car from entering the pit; the limiting assembly is provided with a limiting position right below the elevator car and a non-limiting position on one side of the elevator car;
the position detection device is used for detecting the position of the limiting assembly; when the limiting assembly is located at a limiting position, the position detection device outputs a second trigger signal;
the speed limiter comprises an actuating mechanism and a controller; the actuating mechanism has an action state and a reset state; in the active state, the actuator is used to brake the elevator car; the controller is used for receiving at least one of the first trigger signal and the second trigger signal and controlling the actuating mechanism to execute the action state.
Further, the elevator comprises an elevator central control system; the controller of the speed limiter is connected with an elevator central control system; the elevator central control system comprises an interactive interface used for inputting signals to the controller so as to control the actuating mechanism to switch between the action state and the reset state.
Further, the switch detection device is connected with an elevator central control system.
Further, safety tongs are mounted on the elevator car; the speed-limiting cable is connected with the safety tongs in a linkage manner.
Further, the door opening detection device comprises a door opening detection switch; the door opening detection switch comprises a group of normally open contacts; when the bottom layer hall door is in an open state, the normally open contact of the door opening detection switch is conducted, and a first trigger signal is output.
Furthermore, the limiting assembly comprises a limiting upright post; when the limiting assembly is located at the limiting position, the limiting upright post is detachably connected with the bottom wall of the pit; when the limiting assembly is located at the non-limiting position, the limiting upright post is detachably connected with the side wall of the pit.
Further, the position detection device is arranged on the side wall of the pit.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, through the matching use of the door opening detection device, when the elevator bottom layer hall door is opened and enters the pit, the door opening detection device is triggered and triggers the execution mechanism on the speed limiter to switch into an action state, and the execution mechanism clamps the speed limiting cable in advance, so that the elevator car is prevented from dropping.
2. Through the matching use of the safety tongs, when the elevator car accidentally falls down, the safety tongs perform linkage action, so that the elevator car can be effectively braked to prevent the elevator car from falling down
3. According to the invention, through the matching use of the limiting component, after related personnel enter the pit, the limiting component is arranged at the limiting position, so that the elevator car can be prevented from entering the pit due to accidental movement, and the safety of the related personnel in the pit can be effectively protected. In addition, when the limiting assembly is installed at the limiting position, the position detection device is triggered, the actuating mechanism on the speed limiter can be triggered to be switched into an action state, and the position detection device and the door opening detection device are matched with each other, so that a double protection effect can be achieved.
4. The invention is suitable for the process that the related personnel of the shallow pit elevator enters the pit from the bottom landing door of the elevator and the safety protection after entering the pit.
Drawings
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
FIG. 1 is a schematic diagram of the operation of the present invention;
fig. 2 is a schematic top view of the hoistway, the limiting assembly and other components of the present invention;
FIG. 3 is a front view of the stop assembly of the present invention in the non-stop position;
FIG. 4 is a schematic front view of the position limiting assembly of the present invention
Fig. 5 is a schematic front view of the bottom hall door and the door opening detection device of the present invention;
wherein: 1. a bottom hall door; 2. a door opening detection device; 3. a position detection device; 4. a limiting component; 5. an elevator central control system; 51. a human-machine exchange interface; 6. a speed limiter; 61. a controller; 62. an actuator; 7. an elevator hoistway; 71. an elevator car; 8. and fixing the base.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Fig. 1-5 show a safety arrangement for a shallow pit elevator according to the invention, the elevator of this embodiment being a conventional vertical elevator structure of the prior art. The elevator comprises an elevator shaft 7, an elevator car 71 mounted in the elevator shaft 7 and a speed limiter 6 connected to the elevator car 71 by means of a speed limiting rope (wire rope).
It should be noted that the speed governor 6 for an elevator is a conventional component in the art, and the connection manner of the speed limiting rope and the elevator car 71 is a conventional technical means in the art, and is not described in detail.
A pit is formed at the bottom of the elevator shaft 7. The pit is a shallow pit structure in the art. A hoistway wall of the elevator hoistway 7 is provided with a bottom hall door 1 for entering and exiting the pit. By opening the lower hall doors 1, the relevant persons can get in and out of the pit. The safety protection device of the embodiment comprises a door opening detection device 2, a limiting component 4 and a position detection device 3. The door opening detection device 2 is mounted on the bottom hall door 1, and detects the open/closed state of the bottom hall door 1. When the lower-floor hall door 1 is in the open state, the door opening detection device 2 outputs a first trigger signal. A restraint assembly 4 is mounted in the pit for restraining the elevator car 71 from entering the pit. The limit assembly has a limit position directly below the elevator car 71 and a non-limit position on one side of the elevator car 71 (the particular position is shown in fig. 2). The position detection device 3 is used for detecting the position of the limiting component 4. When the limiting component 4 is located at the limiting position, the position detection device 3 outputs a second trigger signal. The speed governor 6 includes an actuator 62 and a controller 61. The actuator 62 and the controller 61 are conventional technical means of the prior art center. The actuator 62 has an operating state in which the actuator 62 is used to brake the elevator car 71, and a reset state. The actuator 62 restricts downward movement of the elevator car 71 by clamping the speed limiting cable, thereby achieving braking of the elevator car 71. In the above-described reset state, the elevator car 71 moves up and down normally without being affected by the actuator 62. The controller 61 is configured to receive at least one of the first trigger signal and the second trigger signal, and control the actuator 62 to switch to the operating state.
The elevator of the embodiment comprises an elevator central control system 5. The controller of the speed limiter 6 is connected with the elevator central control system 5 through a cable. The elevator central control system 5 comprises an interactive interface 51 for inputting signals to the controller 61 for controlling the actuator 62 to switch back and forth between an active state and a reset state. The actuator 62 can be remotely controlled to perform corresponding actions through the interactive interface 51.
The switch detection device 2 and the position detection device 3 are both connected with an elevator central control system 5 through cables. The switch detection device 2 outputs a first trigger signal and the position detection device 3 outputs a second trigger signal via the elevator central control system 5, and the controller 61 receives the first trigger signal and the second trigger signal to control the actuator 62 to be in an operating state.
The elevator car 71 of the present embodiment is mounted with safety gear. The speed-limiting cable is in linkage connection with the safety gear. The safety gear is a conventional part in the field, and the working principle of the safety gear used in cooperation with the speed-limiting cable are conventional technical means in the field and are not described in detail. When the elevator car 71 is overspeed, runs out of control or the suspension device is broken, the speed-limiting rope pulls the safety gear to operate, so that the safety gear generates friction force on the guide rail, the elevator car 71 is quickly braked on the guide rail, and the elevator car 71 stops moving.
As shown in fig. 5, the door opening detection device 2 includes a door opening detection switch. The door opening detection switch is a contact switch. The door opening detection switch comprises a set of normally open contacts. When the bottom-layer hall door 1 is in an open state, the normally open contact of the door opening detection switch is conducted, and a first trigger signal is output.
As shown in fig. 2-4, the restraint assembly 4 includes a restraint post. The top of spacing stand is installed the bolster. When the spacing assembly 4 is in the spacing position (the position in fig. 4 or the position of the spacing assembly 4 shown in dotted lines in fig. 2), the spacing post is detachably connected to the bottom wall of the pit. Specifically, a fixed base 8 is installed at the limiting position, and the fixed base 8 is connected with the bottom wall of the pit through an expansion bolt. The fixed base 8 is provided with a plug hole matched with the lower end of the limit upright post. The lower end of the limiting upright post is inserted into the plug hole, and the lower end of the limiting upright post is fixed in the plug hole through a static set screw. Through the structural design, the limiting upright post is detachably arranged at the limiting position.
When the stop assembly 4 is in the non-stop position (the position in fig. 3 or the position of the stop assembly 4 shown in solid lines in fig. 2), the stop post is removably connected to the side wall of the pit. Specifically, the side wall of the pit is provided with a hoop through an expansion bolt in advance, and the limit upright post is fixed on the side wall of the pit through the hoop. The position detection device 3 is mounted on the side wall of the pit. The position detection means 3 are preferably contact switches which are approached by the limit post and which are triggered to act when the limit post is fixed to the side wall of the pit. Further, the position detection device 3 may employ a distance sensor.
In maintenance, first, the hoisting machine of the elevator car 71 is remotely controlled by the elevator central control system to stop running and the actuator 62 controlling the governor 6 is switched to an operating state. At this time, the governor rope is caught by the actuator 61 of the governor 6. If the person concerned does not switch the actuator 62 of the governor 6 to the operating state, the door opening detection device 2 is triggered when the person concerned opens the hall door 1, and the controller 61 of the governor 6 also controls the actuator 62 to switch to the operating state. When the elevator car accidentally falls down, the safety tongs perform linkage action, so that the elevator car can be effectively braked, and the falling of the elevator car is prevented. After the relevant person enters the pit, the stopping assembly 4 is detached from the non-stopping position and mounted to the stopping position to prevent the elevator car from entering the pit due to accidental movement. When the limiting assembly is installed at a limiting position, the position detection device 3 is triggered, the controller 61 capable of triggering the speed limiter 6 controls the actuating mechanism 62 to be switched to an action state, the position detection device 3 and the door opening detection device 2 are matched with each other, a double protection effect can be achieved, the situation that the actuating mechanism 62 of the speed limiter 6 is not switched to the action state due to an unexpected situation is avoided, and an effective protection effect is achieved. The embodiment is suitable for the process that the related personnel of the shallow-pit elevator enter the pit from the bottom-layer landing door 1 of the elevator and the safety protection after entering the pit.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A safety protection device of a shallow pit elevator comprises an elevator shaft, an elevator car arranged in the elevator shaft and a speed limiter connected with the elevator car through a speed limiting cable; a pit is arranged at the bottom of the elevator shaft; a bottom layer hoistway door for entering and exiting the pit is arranged on the hoistway wall of the elevator hoistway; the method is characterized in that: the safety protection device comprises a door opening detection device, a limiting assembly and a position detection device;
the door opening detection device is arranged on the bottom layer hall door and used for detecting the opening and closing state of the bottom layer door; when the bottom layer hall door is in an open state, the door opening detection device outputs a first trigger signal;
the limiting assembly is arranged in the pit and used for limiting the elevator car from entering the pit; the limiting assembly is provided with a limiting position right below the elevator car and a non-limiting position on one side of the elevator car;
the position detection device is used for detecting the position of the limiting assembly; when the limiting assembly is located at a limiting position, the position detection device outputs a second trigger signal;
the speed limiter comprises an actuating mechanism and a controller; the actuating mechanism has an action state and a reset state; in the active state, the actuator is used to brake the elevator car; the controller is used for receiving at least one of the first trigger signal and the second trigger signal and controlling the actuating mechanism to be in the action state.
2. Safety protection device of a shallow pit elevator according to claim 1, characterized in that: the elevator comprises an elevator central control system; the controller of the speed limiter is connected with an elevator central control system; the elevator central control system comprises an interactive interface used for inputting signals to the controller so as to control the actuating mechanism to switch between the action state and the reset state.
3. Safety protection device of a shallow pit elevator according to claim 2, characterized in that: the switch detection device is connected with an elevator central control system.
4. Safety protection device of a shallow pit elevator according to claim 1, characterized in that: the elevator car is provided with a safety gear; the speed-limiting cable is connected with the safety tongs in a linkage manner.
5. Safety protection device of a shallow pit elevator according to claim 1, characterized in that: the door opening detection device comprises a door opening detection switch; the door opening detection switch comprises a group of normally open contacts; when the bottom layer hall door is in an open state, the normally open contact of the door opening detection switch is conducted, and a first trigger signal is output.
6. Safety protection device of a shallow pit elevator according to claim 1, characterized in that: the limiting assembly comprises a limiting upright post; when the limiting assembly is located at the limiting position, the limiting upright post is detachably connected with the bottom wall of the pit; when the limiting assembly is located at the non-limiting position, the limiting upright post is detachably connected with the side wall of the pit.
7. Safety protection device of a shallow pit elevator according to claim 1, characterized in that: the position detection device is arranged on the side wall of the pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011430765.0A CN112408138A (en) | 2020-12-07 | 2020-12-07 | Safety protection device of shallow pit elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011430765.0A CN112408138A (en) | 2020-12-07 | 2020-12-07 | Safety protection device of shallow pit elevator |
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| Publication Number | Publication Date |
|---|---|
| CN112408138A true CN112408138A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011430765.0A Pending CN112408138A (en) | 2020-12-07 | 2020-12-07 | Safety protection device of shallow pit elevator |
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| Country | Link |
|---|---|
| CN (1) | CN112408138A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240051793A1 (en) * | 2022-08-15 | 2024-02-15 | Otis Elevator Company | Elevator pit maintenance systems |
-
2020
- 2020-12-07 CN CN202011430765.0A patent/CN112408138A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240051793A1 (en) * | 2022-08-15 | 2024-02-15 | Otis Elevator Company | Elevator pit maintenance systems |
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