Shallow pit elevator bottom layer maintenance safety protection system
The microcontroller-controlled low-level maintenance safety protection system uses different prompt signals to ensure that the elevator car in the shallow pit remains stationary at a designated position, thus solving the safety risk problem during the maintenance of shallow pit elevators and ensuring the safety of maintenance personnel.
Patent Information
- Application Number
- CN202423129771.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Shallow pit elevators pose a safety risk of accidental car movement during maintenance, especially when maintenance personnel enter and exit the shaft, where existing devices are insufficient to effectively ensure safety.
The system employs a microcontroller combined with a bottom-level maintenance switch, landing door lock contacts, a mechanical stop device, a stop button, and an audible alert device. Different audible alerts ensure the car remains stationary at a designated position and alert maintenance personnel at different operational stages whether it is permissible to enter the bottom of the shaft for maintenance work.
Ensure that the car stops safely and reliably at the designated position, and ensure that maintenance personnel can enter and exit the shaft safely through sound prompts, reducing safety risks during the maintenance process.
Smart Images
Figure CN223480532U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevators, and in particular to a safety protection system for maintenance of the bottom floor of a shallow pit elevator. Background Technology
[0002] With the development of my country's economy and society and the emergence of an aging population, more and more people in villas or duplexes are considering installing elevators. However, many houses were not built with elevator shafts in mind, so they can only be added later. If a traditional elevator is installed, a deep pit is required, which requires significant modifications to the building structure. Therefore, shallow pit elevators are becoming increasingly popular.
[0003] To ensure a safe maintenance space at the bottom of the shaft, shallow pit elevators are generally equipped with mechanical stop devices to ensure the safety of maintenance personnel when working at the bottom of the shaft. However, during the process of maintenance personnel entering the shaft and exiting the shaft after maintenance work is completed, there is also a risk of accidental movement of the car, which could cause injury or death to personnel.
[0004] Therefore, there is a need for a protective device that ensures the safety of maintenance personnel before, during, and after entering the shaft, prevents the elevator from moving throughout the entire operation, and alerts maintenance personnel by controlling changes in sound to indicate whether it is permissible to enter the bottom of the shaft for maintenance work.
[0005] Therefore, there is a need for further improvement of the existing system.
[0006] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content
[0007] The purpose of this utility model is to provide a safety protection system for maintenance at the bottom of a shallow pit elevator, which enables the car to remain stationary after safely and reliably reaching a designated position, and reminds maintenance personnel through different prompts whether it is permissible to enter the bottom of the shaft for maintenance work, thereby ensuring the safety of personnel entering the bottom of the shaft for maintenance work.
[0008] This utility model provides a safety protection system for ground floor maintenance of a shallow pit elevator, comprising: a microcontroller and a ground floor maintenance switch, a landing door lock contact, a mechanical stop device, a stop button, and an audible alarm device electrically connected to the microcontroller; the ground floor maintenance switch is configured to generate a ground floor maintenance switch working signal upon receiving a first operation and send the working signal to the microcontroller; the landing door lock contact is configured to generate a landing door disconnect signal when the landing door is open and send the landing door disconnect signal to the microcontroller; the stop button is configured to generate a stop button working signal upon receiving a second operation and send the stop button working signal to the microcontroller; the mechanical stop device is configured to generate a stop button working signal upon receiving a second operation and send the stop button working signal to the microcontroller; the mechanical stop device is configured to generate a stop button working signal upon receiving a second operation and send the stop button working signal to the microcontroller. After the three operations, a mechanical stop device working signal is generated and sent to the microcontroller. The microcontroller is configured to: generate an upward signal that causes the car to move upward to a predetermined position and remain at the predetermined position after receiving the bottom maintenance switch working signal; generate a first prompt tone signal or a second prompt tone signal at different stages in the process of sequentially receiving the bottom maintenance switch working signal, the landing door open signal, the stop button working signal, and the mechanical stop device working signal, and send the first prompt tone signal or the second prompt tone signal to the sound reminder device; the sound reminder device is configured to: generate a first prompt tone under the control of the first prompt tone signal, and generate a second prompt tone under the control of the second prompt tone signal.
[0009] Preferably, the stop button is further configured to: generate a stop button non-working signal after receiving a fourth operation, and send the stop button non-working signal to the microcontroller; the mechanical stop device is further configured to: generate a mechanical stop device non-working signal after receiving a fifth operation, and send the mechanical stop device non-working signal to the microcontroller; the bottom maintenance switch is further configured to: generate a bottom maintenance switch non-working signal after receiving a sixth operation, and send the bottom maintenance switch non-working signal to the microcontroller; the door lock contact is further configured to: generate a trigger signal after receiving a seventh operation, and send the trigger signal to the microcontroller; the microcontroller is further configured to: generate a control signal upon receiving the trigger signal when receiving the stop button non-working signal, the mechanical stop device non-working signal, and the bottom maintenance switch non-working signal, and send the control signal to the sound reminder device, so that the sound reminder device no longer generates the first and second prompt sounds.
[0010] Preferably, the landing door lock contact is further configured to: generate a landing door closing signal when the landing door is closed, and send the landing door closing signal to the microcontroller; the microcontroller is further configured to: generate a second prompt tone signal after receiving the landing door closing signal, and send the second prompt tone signal to the sound reminder device, so that the sound reminder device can generate a second prompt tone.
[0011] Preferably, the door lock contact is configured to perform multiple on / off operations within a predetermined time period to generate door closing signals and door opening signals in turn, thereby forming the trigger signal.
[0012] Preferably, the mechanical stop device has an extension switch and a retraction switch; the mechanical stop device is configured to generate a non-operating signal when the retraction switch is closed and the extension switch is open, and send the non-operating signal to the microcontroller; the mechanical stop device is also configured to generate an operating signal when the retraction switch is open and the extension switch is closed, and send the operating status signal to the microcontroller.
[0013] Preferably, the sound reminder device is a buzzer.
[0014] Preferably, the microcontroller is further configured to: upon receiving the working signal of the underlying maintenance switch, sequentially generate a first prompt tone signal and a second prompt tone signal, and be able to send the first prompt tone signal and the second prompt tone signal to the sound reminder device; the sound reminder device is able to generate a first prompt tone under the control of the first prompt tone signal, the duration of the first prompt tone being the same as the duration of the car moving upward to the predetermined position, so as to remind the maintenance personnel that the car is moving upward; the sound reminder device is able to generate a second prompt tone under the control of the second prompt tone signal when the car moves upward to the predetermined position, so as to remind the maintenance personnel that the car has moved upward to the predetermined position.
[0015] Preferably, the microcontroller is configured to: generate a first prompt tone signal when it receives a door disconnection signal, but has not yet received a stop button working signal or a mechanical stop device working signal, and be able to send the first prompt tone signal to the sound reminder device; the sound reminder device is able to generate the first prompt tone under the control of the first prompt tone signal.
[0016] Preferably, the microcontroller is further configured to: generate a first prompt tone signal when it receives a non-working signal from the stop button or a non-working signal from the mechanical stop device, and before receiving a door closing signal, and be able to send the first prompt tone signal to the sound reminder device; the sound reminder device is able to generate the first prompt tone under the control of the first prompt tone signal.
[0017] Preferably, the shallow pit elevator bottom-level maintenance safety protection system further includes: a bottom-level maintenance lighting device, which is installed in the pit and electrically connected to a microcontroller; the microcontroller is also configured to: generate a light-emitting signal after receiving a bottom-level maintenance switch working signal, and send the light-emitting signal to the bottom-level maintenance lighting device; the bottom-level maintenance lighting device is configured to: emit light under the control of the light-emitting signal to provide illumination for maintenance personnel.
[0018] This utility model discloses a safety protection system for maintenance at the bottom of a shallow pit elevator. It utilizes an upward signal to ensure the car remains stationary after safely and reliably reaching a designated position, thus facilitating access for maintenance personnel to the elevator shaft. Furthermore, a microcontroller detects the switch status of various devices and issues different audible alerts to indicate whether it is permissible for maintenance personnel to enter the bottom of the shaft, thereby ensuring their safety.
[0019] The method and apparatus of this invention have other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the particular principles of this invention. Attached Figure Description
[0020] Figure 1 This is a structural schematic diagram of the shallow pit elevator bottom maintenance safety protection system according to the embodiment of this utility model;
[0021] Figure 2 This is a schematic diagram of the working process of the shallow pit elevator bottom maintenance safety protection system according to the embodiment of this utility model. Figure 1 ;
[0022] Figure 3 This is a schematic diagram of the working process of the shallow pit elevator bottom maintenance safety protection system according to the embodiment of this utility model. Figure 2 .
[0023] Explanation of reference numerals in the attached figures:
[0024] 100. Microcontroller; 200. Bottom floor maintenance switch; 300. Floor door lock contact; 400. Mechanical stop device; 500. Stop button; 600. Bottom floor maintenance lighting device; 700. Sound reminder device.
[0025] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of this invention. The specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific application and environment in which they will be used.
[0026] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation
[0027] The present invention will now be described in detail with reference to various embodiments, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.
[0028] The ordinal numbers used in this article, such as "first operation" and "second operation," do not represent a sequential order, but are used to distinguish between different operations.
[0029] The following combination Figures 1 to 3 The safety protection system for maintenance of the bottom floor of a shallow pit elevator according to the embodiment of this utility model is described.
[0030] like Figure 1 As shown, the shallow pit elevator bottom maintenance safety protection system of this utility model includes: a microcontroller 100 and a bottom maintenance switch 200, a landing door lock contact 300, a mechanical stop device 400, a stop button 500, and an audible reminder device 700 electrically connected to the microcontroller 100.
[0031] The bottom-level maintenance switch 200 can generate a bottom-level maintenance switch working signal after receiving the first operation, and send the bottom-level maintenance switch working signal to the microcontroller 100.
[0032] The landing door lock contact 300 can generate a landing door disconnect signal when the landing door is open, and send the landing door disconnect signal to the microcontroller 100.
[0033] The stop button 500 can generate a stop button working signal after receiving the second operation, and send the stop button working signal to the microcontroller 100.
[0034] The mechanical stop device 400 can receive the mechanical stop device working signal after the third operation and send the mechanical stop device working signal to the microcontroller 100.
[0035] Upon receiving the working signal from the bottom maintenance switch, the microcontroller 100 is able to generate an upward signal that causes the car to move upward to a predetermined position.
[0036] During different stages of receiving the bottom maintenance switch working signal, the door opening signal, the stop button working signal, and the mechanical stop device working signal in sequence, the microcontroller 100 can generate a first prompt tone signal or a second prompt tone signal and send the first prompt tone signal or the second prompt tone signal to the sound reminder device 700.
[0037] The sound reminder device 700 can generate a first reminder tone under the control of a first reminder tone signal.
[0038] The sound reminder device 700 can generate a second reminder tone under the control of the second reminder tone signal.
[0039] This invention utilizes an upward signal to ensure the elevator car remains stationary after safely and reliably reaching a designated position, thus facilitating maintenance personnel's access to the elevator shaft for repair work. Furthermore, the microcontroller 100 detects the switch status of various devices and issues different alert sounds to remind maintenance personnel whether it is permissible to enter the bottom of the shaft for repair work, thereby ensuring the safety of personnel performing maintenance work at the bottom of the shaft.
[0040] In an exemplary embodiment, the stop button 500 can also generate a stop button not working signal after receiving a fourth operation, and send the stop button not working signal to the microcontroller 100.
[0041] The mechanical stop device 400 can also receive a non-operating signal generated after the fifth operation and send the non-operating signal to the microcontroller 100.
[0042] The bottom-level maintenance switch 200 can also generate a bottom-level maintenance switch non-working signal after receiving the sixth operation, and send the bottom-level maintenance switch non-working signal to the microcontroller 100.
[0043] The door lock contact 300 can also generate a trigger signal after receiving the seventh operation and send the trigger signal to the microcontroller 100. The seventh operation includes performing multiple on and off operations within a predetermined time.
[0044] The microcontroller 100 generates a control signal upon sequentially receiving a stop button inactive signal, a mechanical stop device inactive signal, a bottom floor maintenance switch inactive signal, and a trigger signal. This control signal is then sent to the audible alert device 700, causing the audible alert device 700 to cease producing the first and second alert tones. In other words, the elevator resumes normal automatic operation.
[0045] The following is a detailed introduction to each device.
[0046] The microcontroller 100 is installed in the elevator machine room control cabinet, which is usually located at the top of the elevator shaft.
[0047] The microcontroller 100 is electrically connected to the bottom maintenance switch 200, the door lock contact 300, the mechanical stop device 400, the stop button 500, the bottom maintenance lighting device 600, and the sound reminder device 700.
[0048] The microcontroller 100 is used to detect the status of the bottom maintenance switch 200, the status of the door lock contact 300, the status of the mechanical stop device 400, and the status of the stop button 500.
[0049] The microcontroller 100 can control the underlying maintenance lighting device 600 (described later) to light up or not light up, and can control the sound reminder device 700 to emit a first prompt tone and a second prompt tone.
[0050] The bottom maintenance switch 200 is located outside the landing door at the very bottom of the elevator shaft. The bottom floor refers to the lowest floor that the elevator car can reach. For example, if the elevator car can travel from -1 to 10 floors, the bottom floor is -1 floor.
[0051] The underlying maintenance switch 200 has an on state (i.e., an active state) and an off state (i.e., an inactive state). The microcontroller 100 can detect whether the underlying maintenance switch 200 is in the on state or the off state. Specifically, the underlying maintenance switch 200 can generate an on state when it is in the on state and can send the on state signal to the microcontroller 100. The underlying maintenance switch 200 can generate an inactive state when it is in the off state and can send the inactive state signal to the microcontroller 100, thereby enabling the microcontroller 100 to detect whether the underlying maintenance switch 200 is in the on state or the off state.
[0052] Upon receiving the first operation, the underlying maintenance switch 200 can switch from the closed state to the open state. The first operation refers to turning on the underlying maintenance switch 200.
[0053] Upon receiving the sixth operation, the underlying maintenance switch 200 can switch from the open state to the closed state. The sixth operation refers to turning off the underlying maintenance switch 200.
[0054] The bottom-level maintenance switch 200 can only be opened or closed with special tools and can only be operated by authorized personnel. Furthermore, the surface of the bottom-level maintenance switch 200 is painted yellow as a warning color.
[0055] The landing door lock contact 300 is used to detect whether the landing doors are fully closed and locked. The elevator can only start running when all landing doors are fully closed and locked. The status signal of the landing door lock contact 300 is transmitted to the microcontroller 100. If any landing door is not closed or locked, the microcontroller 100 will prevent the elevator from running to prevent accidents.
[0056] The landing door lock contact 300 is usually integrated with the landing door lock device and installed on the top or side of the landing door.
[0057] The landing door lock contact 300 has an open state and a closed state. The landing door lock contact 300 can generate a landing door open signal when the landing door is open, and can send the landing door open signal to the microcontroller 100. The landing door lock contact 300 can generate a landing door closed signal when the landing door is closed, and can send the landing door closed signal to the microcontroller 100.
[0058] The landing door lock contact 300 can perform multiple on / off operations (i.e., the seventh operation) within a predetermined time to generate landing door closing signals and landing door opening signals in turn, thereby forming the trigger signal. For example, maintenance personnel can use a special tool to turn the landing door lock contact 300 on and off four times within 5 seconds to generate the trigger signal.
[0059] The mechanical stop device 400 has an open state (i.e., an operating state) and a closed state (i.e., a non-operating state). The microcontroller 100 can detect whether the mechanical stop device 400 is in the open or closed state. Specifically, the mechanical stop device 400 can generate a mechanical stop device operating signal when it is in the open state and can send the mechanical stop device operating signal to the microcontroller 100. The mechanical stop device 400 can generate a mechanical stop device non-operating signal when it is in the closed state and can send the mechanical stop device non-operating signal to the microcontroller 100, thereby enabling the microcontroller 100 to detect whether the mechanical stop device 400 is in the open or closed state.
[0060] Upon receiving the third operation, the mechanical stop device 400 can switch from the closed state to the open state. The third operation refers to opening the mechanical stop device 400.
[0061] Upon receiving the fifth operation, the mechanical stop device 400 can switch from the open state to the closed state. The fifth operation refers to closing the mechanical stop device 400.
[0062] In an exemplary embodiment, the mechanical stop device 400 has an extension switch and a retraction switch.
[0063] The mechanical stop device 400 is in the closed state when the retracted position switch is closed and the extended position switch is open, and generates a mechanical stop device non-working signal, which can be sent to the microcontroller 100.
[0064] The mechanical stop device 400 is in the open state when the retracted position switch is off and the extended position switch is closed, and it can generate a mechanical stop device working signal and send the mechanical stop device working status signal to the microcontroller 100.
[0065] The mechanical stop device 400 is in an abnormal state when both the retracted and extended position switches are closed or both are open, and it can generate an abnormal signal for the mechanical stop device and send the abnormal signal to the microcontroller 100.
[0066] When the microcontroller 100 detects that the mechanical stop device 400 is in the open state (i.e., in the working state) or in an abnormal state, it prohibits the car from moving up or down.
[0067] Specifically, the retractable switch can generate a retractable switch open signal when it is open, and can send the retractable switch open signal to the microcontroller 100. The retractable switch can generate a retractable switch closed signal when it is closed, and can send the retractable switch closed signal to the microcontroller 100. The extended switch can generate an extended switch open signal when it is open, and can send the extended switch open signal to the microcontroller 100. The extended switch can generate an extended switch closed signal when it is closed, and can send the extended switch closed signal to the microcontroller 100.
[0068] The closed signal of the retracted position switch and the open signal of the extended position switch constitute the non-operating status signal of the mechanical stop device. The open signal of the retracted position switch and the closed signal of the extended position switch constitute the operating status signal of the mechanical stop device. The closed signal of the retracted position switch and the closed signal of the extended position switch constitute the abnormal signal of the mechanical stop device. The open signal of the retracted position switch and the open signal of the extended position switch constitute the abnormal signal of the mechanical stop device.
[0069] The stop button 500 is located in the pit of the elevator shaft. The button is usually red and has clear markings such as "Stop" or "Emergency Stop" to ensure that it can be quickly identified and used in an emergency.
[0070] The stop button 500 has an on state (i.e., working state) and an off state (i.e., non-working state). The microcontroller 100 can detect whether the stop button 500 is in the on state or the off state. Specifically, the stop button 500 can generate a stop button working signal in the on working state and send the stop button working signal to the microcontroller 100. The stop button 500 can generate a stop button non-working signal in the off state (i.e., non-working state) and send the stop button non-working signal to the microcontroller 100, thereby enabling the microcontroller 100 to detect whether the stop button 500 is in the on state or the off state.
[0071] Upon receiving the second operation, the stop button 500 can switch from the closed state to the open state. The second operation refers to turning on the stop button 500.
[0072] Upon receiving the fourth operation, the stop button 500 can switch from the open state to the closed state. The fourth operation refers to turning off the stop button 500.
[0073] The embodiment of this utility model also includes a bottom maintenance lighting device 600, which is electrically connected to the microcontroller 100.
[0074] A ground-level maintenance lighting device 600 is installed inside the pit. The ground-level maintenance lighting device 600 emits light under the control of a microcontroller 100 to provide sufficient lighting for ground-level maintenance personnel. Specifically, upon receiving a ground-level maintenance switch operating signal, the microcontroller 100 generates a light emission signal and sends it to the ground-level maintenance lighting device 600. The ground-level maintenance lighting device 600 emits light under the control of the light emission signal to provide illumination for maintenance personnel.
[0075] In addition, after receiving the non-working signal of the bottom maintenance switch, the microcontroller 100 can generate a light-off signal and send the light-off signal to the bottom maintenance lighting device 600, so that the bottom maintenance lighting device 600 stops emitting light.
[0076] An audible alert device 700 is installed on the car. In an exemplary embodiment, the audible alert device 700 may be a buzzer, but the type of audible alert device 700 is not limited thereto; it may be any form in the prior art, as long as it can achieve the above-mentioned functions.
[0077] The first prompt tone is a rapid prompt tone, and the second prompt tone is a gentle prompt tone.
[0078] The shallow pit elevator bottom maintenance safety protection system of this utility model also includes a power unit (not shown in the figure), which is electrically connected to the microcontroller 100 and can drive the car to move up or down under the control of the microcontroller 100.
[0079] The elevator involved in this utility model is a conventional vertical elevator structure in the prior art.
[0080] The basic process of the safety protection system for the bottom maintenance of a shallow pit elevator is as follows: Figure 2 and Figure 3 As shown, the process before entering the pit is as follows: Figure 2 As shown, the process after exiting the pit is as follows: Figure 3 As shown.
[0081] In step S101, the control panel outside the bottommost door receives the eighth operation from the maintenance personnel, generates an indication signal, and sends the indication signal to the microcontroller 100.
[0082] In step S102, the microcontroller 100 generates a downlink signal according to the instruction signal and sends the downlink signal to the power unit. Under the control of the downlink signal, the power unit drives the car to move down to the bottom floor.
[0083] In step S103, after receiving the first operation, the bottom-level maintenance switch 200 generates a bottom-level maintenance switch working signal and sends the bottom-level maintenance switch working signal to the microcontroller 100.
[0084] In step S104, the microcontroller 100 generates an uplink signal, a light-emitting signal, a first prompt tone signal, and a second prompt tone signal based on the working signal of the underlying maintenance switch.
[0085] In step S105, the microcontroller 100 sends an upward signal to the elevator's power module, causing the car to move upward to a predetermined height. For steps S101 to S105, maintenance personnel move the car to the lowest floor and use a special tool to open the bottom floor maintenance switch 200. The microcontroller 100 determines that the bottom floor maintenance switch 200 is open and controls the car to move to the designated position.
[0086] In step S106, the microcontroller 100 sends a light-emitting signal to the bottom-level maintenance lighting device 600, causing the bottom-level maintenance lighting device 600 to emit light to provide illumination for maintenance personnel.
[0087] In step S107, the microcontroller 100 sends the first prompt tone signal and the second prompt tone signal to the sound reminder device 700, so that the sound reminder device 700 emits the first prompt tone during the upward movement of the car to remind the maintenance personnel that the car is moving upward, and emits the second prompt tone after the car moves upward to remind the maintenance personnel that the car has reached the predetermined height and that the elevator needs to be opened, that is, the landing door needs to be opened.
[0088] In step S108, the maintenance personnel use a special tool to open the landing door. The landing door lock contact 300 generates a landing door disconnect signal when the door is open and sends this signal to the microcontroller 100. After opening the bottom landing door, entry is not permitted; the stop button 500 and mechanical stop device 400 must be activated. To prevent maintenance personnel from forgetting to activate these devices and entering the pit directly, a reminder is required. This can be achieved using the audible reminder device 700, proceeding to step S109. It should be noted that maintenance personnel can reach into the pit from the outside to access the stop button 500 and mechanical stop device 400 and complete the necessary operations.
[0089] In step S109, after receiving the landing door disconnection signal, the microcontroller 100 generates a first prompt tone signal and sends it to the sound reminder device 700, causing the sound reminder device 700 to emit a first prompt tone to remind maintenance personnel to perform a second operation on the mechanical stop device 400 and a third operation on the stop button 500. That is, the landing door disconnection signal generated by the landing door opening triggers the sound reminder device 700, alerting maintenance personnel simultaneously with the opening of the landing door to prevent them from directly entering the pit. After hearing the first prompt tone, maintenance personnel need to activate the stop button 500 and the mechanical stop device 400, i.e., proceed to steps S110 and S111.
[0090] In step S110, after receiving the second operation from the maintenance personnel, the stop button 500 generates a stop button working signal and sends the stop button working signal to the microcontroller 100.
[0091] In step S111, after receiving the third operation, the mechanical stop device 400 generates a mechanical stop device working signal and sends the mechanical stop device working signal to the microcontroller 100.
[0092] In step S112, after receiving the working signal of the stop button and the working signal of the mechanical stop device, the microcontroller 100 generates a second prompt tone signal and sends the second prompt tone signal to the sound reminder device 700, so that the sound reminder device 700 emits a second prompt tone to remind the maintenance personnel that it is safe to enter the pit and carry out maintenance work.
[0093] After the maintenance personnel complete their work and exit the shaft, they need to perform the corresponding reset operations, which include turning off the stop button 500 (corresponding to step S113), turning off the mechanical stop device 400 (corresponding to step S114), turning off the landing door and the bottom maintenance switch 200 (corresponding to step S117), and turning the landing door lock contact 300 on and off multiple times within a predetermined time (corresponding to step S118).
[0094] In step S113, after receiving the fourth operation from the maintenance personnel, the stop button 500 generates a stop button non-working signal and sends the stop button non-working signal to the microcontroller 100.
[0095] In step S114, after receiving the fifth operation from the maintenance personnel, the mechanical stop device 400 generates a non-operating signal and sends it to the microcontroller 100. Similarly, the maintenance personnel can reach into the pit from outside the pit to touch the stop button 500 and the mechanical stop device 400 and complete the relevant operations.
[0096] In step S115, after receiving a non-working signal from the stop button or a non-working signal from the mechanical stop device, the microcontroller 100 generates a first prompt tone signal and sends the first prompt tone signal to the sound reminder device 700, so that the sound reminder device 700 emits a first prompt tone to remind maintenance personnel not to enter the shaft at this time, for example, to prohibit them from entering the shaft to retrieve lost tools or to enter the shaft for other operations.
[0097] In step S116, after receiving the landing door closing signal, the microcontroller 100 generates a second prompt tone signal and sends the second prompt tone signal to the sound reminder device 700, so that the sound reminder device 700 generates a second prompt tone to remind the maintenance personnel that the landing door has been closed.
[0098] In step S117, after receiving the sixth operation, the bottom-level maintenance switch 200 generates a bottom-level maintenance switch non-operation signal and sends the bottom-level maintenance switch non-operation signal to the microcontroller 100. Specifically, the maintenance personnel use a special tool to turn off the bottom-level maintenance switch 200.
[0099] In step S118, after receiving the seventh operation, the door lock contact 300 generates a trigger signal and sends the trigger signal to the microcontroller 100. The seventh operation includes performing multiple on / off operations within a predetermined time.
[0100] In step S119, the microcontroller 100 determines whether it has received a stop button non-working signal, a mechanical stop device non-working signal, or a bottom maintenance switch non-working signal before receiving the trigger signal.
[0101] It should be noted that regardless of which stage the first or second prompt tone is generated, the prompt tone will persist until a change occurs. For example, after the first prompt tone is generated in step S109, it will persist until the second prompt tone is generated in step S112, at which point the first prompt tone generated in step S109 will disappear. Then, the second prompt tone will persist until the first prompt tone is generated again in step S115.
[0102] As a result of step S119, in step S120, if the stop button non-working signal, the mechanical stop device non-working signal, and the bottom maintenance switch non-working signal have been received before the trigger signal is received, the microcontroller 100 generates a control signal and sends the control signal to the sound reminder device 700, causing the sound reminder device 700 to stop generating the first and second prompt sounds. That is, the elevator resumes normal automatic operation mode.
[0103] As a result of step S119, in step S121, if no stop button non-working signal, mechanical stop device non-working signal, or bottom floor maintenance switch non-working signal is received before the trigger signal is received, the elevator cannot resume normal automatic operation mode. The microcontroller 100 acquires the status of the bottom floor maintenance switch 200, landing door lock contact 300, mechanical stop device 400, and stop button 500, and sends it to the handheld terminal of the maintenance personnel to facilitate troubleshooting and problem-solving. For example, if only the mechanical stop device non-working signal and the bottom floor maintenance switch non-working signal are received before the trigger signal is received, but the stop button non-working signal is not received, the maintenance personnel need to perform a fourth operation on the stop button 500 to generate a stop button non-working signal. It should be noted that the order of receiving the stop button non-working signal, mechanical stop device non-working signal, and bottom floor maintenance switch non-working signal is not required; it is only required that these three non-working signals are received before the trigger signal is received. After the problem is solved, step S118 is performed again.
[0104] Furthermore, in step S122, after receiving the non-working signal of the bottom maintenance switch, the microcontroller 100 generates a light-off signal and sends the light-off signal to the bottom maintenance lighting device 600, so that the bottom maintenance lighting device 600 stops emitting light.
[0105] If the mechanical stop device 400 malfunctions during the entire maintenance process, it will generate a mechanical stop device abnormality signal and send the mechanical stop device abnormality signal to the microcontroller 100.
[0106] After receiving an abnormal signal from the mechanical stop device, the microcontroller 100 generates a first prompt tone signal, which causes the sound reminder device 700 to generate a first prompt tone to alert maintenance personnel.
[0107] If maintenance personnel have already entered the pit, they need to exit the pit immediately.
[0108] If the maintenance personnel have not yet entered the pit at this time, it is necessary to check for risks until the sound reminder device 700 produces a second prompt sound.
[0109] For ease of interpretation and precise definition of the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “above,” “below,” “above,” “below,” “upward,” “downward,” “front,” “back,” “behind,” “inner side,” “outer side,” “inward,” “outer,” “internal,” “external,” “inner,” “external,” “forward,” and “backward” are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.
[0110] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A safety protection system for maintenance of the bottom floor of a shallow pit elevator, characterized in that, include: The microcontroller is electrically connected to the microcontroller's underlying maintenance switch, door lock contacts, mechanical stop device, stop button, and sound reminder device; The underlying maintenance switch is configured to generate an underlying maintenance switch working signal after receiving the first operation, and send the underlying maintenance switch working signal to the microcontroller; The landing door lock contact is configured to generate a landing door disconnect signal when the landing door is open, and send the landing door disconnect signal to the microcontroller; The stop button is configured to generate a stop button working signal after receiving the second operation, and send the stop button working signal to the microcontroller; The mechanical stop device is configured to generate a mechanical stop device working signal after receiving the third operation, and send the mechanical stop device working signal to the microcontroller; The microcontroller is configured as follows: Upon receiving the working signal from the bottom maintenance switch, an upward signal is generated that causes the car to move upward to a predetermined position and remain at the predetermined position. At different stages during the process of sequentially receiving the bottom maintenance switch working signal, the landing door disconnect signal, the stop button working signal, and the mechanical stop device working signal, a first prompt sound signal or a second prompt sound signal is generated and sent to the sound reminder device. The sound reminder device is configured to generate a first reminder tone under the control of a first reminder tone signal, and to generate a second reminder tone under the control of a second reminder tone signal.
2. The shallow pit elevator bottom maintenance safety protection system according to claim 1, characterized in that, The stop button is also configured to: generate a stop button non-working signal after receiving the fourth operation, and send the stop button non-working signal to the microcontroller; The mechanical stop device is further configured to: generate a mechanical stop device non-operation signal after receiving the fifth operation, and send the mechanical stop device non-operation signal to the microcontroller; The underlying maintenance switch is also configured to: generate a non-operating signal for the underlying maintenance switch after receiving the sixth operation, and send the non-operating signal for the underlying maintenance switch to the microcontroller; The door lock contact is also configured to generate a trigger signal upon receiving the seventh operation and send the trigger signal to the microcontroller. The microcontroller is also configured to: when receiving a non-working signal from the stop button, a non-working signal from the mechanical stop device, and a non-working signal from the bottom maintenance switch, generate a control signal upon receiving a trigger signal and send the control signal to the sound reminder device, so that the sound reminder device no longer generates the first and second prompt sounds.
3. The shallow pit elevator bottom maintenance safety protection system according to claim 1, characterized in that, The door lock contact is also configured to generate a door closing signal when the door is closed, and send the door closing signal to the microcontroller. The microcontroller is also configured to: generate a second prompt tone signal after receiving a door closing signal, and send the second prompt tone signal to the sound reminder device, so that the sound reminder device can generate the second prompt tone.
4. The shallow pit elevator bottom maintenance safety protection system according to claim 2, characterized in that, The door lock contact is configured to perform multiple on / off operations within a predetermined time period to generate door closing and door opening signals in turn, thereby forming the trigger signal.
5. The shallow pit elevator bottom maintenance safety protection system according to claim 1, characterized in that, The mechanical stop device has an extension switch and a retraction switch; The mechanical stop device is configured to generate a non-operating signal when the retracted position switch is closed and the extended position switch is open, and send the non-operating signal to the microcontroller. The mechanical stop device is configured to generate a mechanical stop device working signal when the retracted position switch is open and the extended position switch is closed, and send the mechanical stop device working status signal to the microcontroller.
6. The shallow pit elevator bottom-level maintenance safety protection system according to claim 1, characterized in that, The sound alert device is a buzzer.
7. The shallow pit elevator bottom maintenance safety protection system according to claim 1, characterized in that, The microcontroller is also configured to: after receiving the working signal of the underlying maintenance switch, generate a first prompt tone signal and a second prompt tone signal in sequence, and be able to send the first prompt tone signal and the second prompt tone signal to the sound reminder device; The sound reminder device can generate a first reminder tone under the control of a first reminder tone signal. The duration of the first reminder tone is the same as the duration of the car moving upward to the predetermined position, so as to remind maintenance personnel that the car is moving upward. The sound reminder device can generate a second reminder sound when the car moves upward to a predetermined position under the control of the second reminder sound signal, so as to remind maintenance personnel that the car has moved upward to the predetermined position.
8. The shallow pit elevator bottom-level maintenance safety protection system according to claim 1, characterized in that, The microcontroller is configured to generate a first prompt tone signal when it receives a door opening signal but has not yet received a stop button working signal or a mechanical stop device working signal, and to send the first prompt tone signal to the sound reminder device. The sound reminder device can generate a first reminder tone under the control of a first reminder tone signal.
9. The shallow pit elevator bottom-level maintenance safety protection system according to claim 2, characterized in that, The microcontroller is also configured to generate a first prompt sound signal when it receives a non-working signal from the stop button or a non-working signal from the mechanical stop device, and before it receives a door closing signal, and to send the first prompt sound signal to the sound reminder device. The sound reminder device can generate a first reminder tone under the control of a first reminder tone signal.
10. The shallow pit elevator bottom-level maintenance safety protection system according to claim 1, characterized in that, It further includes: The bottom maintenance lighting device is installed in the pit and electrically connected to the microcontroller; The microcontroller is also configured to: generate a light-emitting signal after receiving the working signal of the underlying maintenance switch, and send the light-emitting signal to the underlying maintenance lighting device; The underlying maintenance lighting device is configured to emit light under the control of a light emission signal to provide illumination for maintenance personnel.