Dual-car elevator safety management system

Abstract

The application discloses a double-car elevator safety management system, which comprises a safety cabinet, a plurality of safety devices arranged on an upper-car elevator and a plurality of safety devices arranged on a lower-car elevator, each safety device corresponds to a safety function, for the same safety function, the upper-car elevator and the lower-car elevator are respectively provided with a safety device with the safety function, and the safety cabinet is used for collecting a first detection signal and a second detection signal of the safety devices with the same safety function as the action safety device in the upper-car elevator and the lower-car elevator respectively when the action of the safety device of one car is detected; according to the first detection signal or the second detection signal, a safety function common action table pre-stored in the safety cabinet is used to judge whether the other car is controlled simultaneously through the action safety device; if yes, a safety instruction is sent to the safety device of the other car to simultaneously realize the control of the upper-car elevator and the lower-car elevator.

Description

Technical Field

[0001] This application relates to the field of elevator safety technology, and in particular to a safety management system for a dual-car elevator. Background Technology

[0002] A double-car elevator is an elevator that has two independently operating elevator cars in the same elevator shaft. These two elevators are generally called the upper car elevator and the lower car elevator. When the two elevators share a shaft, an independent safety device must still be installed in the elevator machine space so that when the safety device is activated, the elevator corresponding to the safety device enters a safe state, that is, it stops running immediately and cannot continue to run.

[0003] The activation of safety devices in elevators usually indicates a certain type of malfunction. Considering that if one elevator is in a malfunctioning state with its safety device activated while the other is in a normal state, passengers in the normally operating elevator or maintenance personnel in the malfunctioning elevator may be at risk of interference or rotational movement of the two elevator components, it is necessary to install two safety devices for the same safety function of an elevator. One device acts on the elevator itself (up / down car), and the other acts on the other elevator (down / up car). This way, when the elevator's safety device is activated, both elevators can enter a safe state simultaneously, avoiding potential safety hazards.

[0004] However, due to size limitations, it is difficult to install two safety devices for the same safety function on an elevator. Even if two safety devices are installed, they are wired separately, which may lead to incorrect wiring and is not conducive to maintenance and troubleshooting. Summary of the Invention

[0005] The purpose of this application is to provide a safety management system for a dual-car elevator. It can control both elevators in a dual-car elevator to enter a safe state simultaneously without installing two safety devices for the same safety function of one elevator. This is easy to implement and facilitates maintenance personnel in inspecting and troubleshooting elevators.

[0006] To address the aforementioned technical problems, embodiments of this application provide a dual-car elevator safety management system, including a safety cabinet installed in the elevator machine room, multiple safety devices installed in the upper car elevator, and multiple safety devices installed in the lower car elevator. The safety cabinet is connected to the safety devices in the upper car elevator and the lower car elevator, respectively. Each safety device has a corresponding safety function, and for the same safety function, the upper car elevator and the lower car elevator are each equipped with a safety device having that safety function. The safety cabinet is used to detect when the safety device of one car in the dual-car elevator is activated. In the event of operation, the first detection signal of the safety device with the same safety function as the safety device that caused the operation in the upper car elevator and the second detection signal of the safety device with the same safety function as the safety device that caused the operation in the lower car elevator are collected respectively; and based on the first detection signal or the second detection signal, the safety function interaction table stored in the safety cabinet is used to determine whether the safety device that caused the operation should simultaneously control the other car in the double-car elevator; if it is determined that the other car in the double-car elevator should be controlled, a safety command is sent to the safety device of the other car.

[0007] The dual-car elevator safety management system of this application includes a safety cabinet installed in the elevator machine room, multiple safety devices installed in the upper car elevator, and multiple safety devices installed in the lower car elevator. The safety cabinet is connected to the safety devices of the upper car elevator and the lower car elevator, respectively. Therefore, the safety cabinet can detect whether the safety device of any car in the dual-car elevator is activated. Each safety device has a corresponding safety function. For the same safety function, the upper car elevator and the lower car elevator are each equipped with a safety device having that safety function. Therefore, if the safety device of one car in the dual-car elevator is activated, that car's safety circuit is broken. When open, the safety cabinet collects the first detection signal from the safety device with the same safety function as the activated safety device in the upper elevator car, and the second detection signal from the safety device with the same safety function in the lower elevator car. Then, based on either the first or second detection signal, the safety cabinet uses a pre-stored safety function interaction table to determine whether the activated safety device simultaneously controls the other car in the two-car elevator, i.e., whether the safety circuit controlling the other car is also disconnected. If it is determined that the other car in the two-car elevator is being controlled, a safety command is sent to the safety device in that car. Therefore, this application can simultaneously control both the upper and lower elevator cars without requiring two safety devices for one safety function in one car, making it easy to implement and beneficial for maintenance personnel to inspect and troubleshoot elevators.

[0008] In addition, the safety device includes the safety device for the upper car elevator and the safety device for the lower car elevator installed in the elevator machine room; the first detection signal includes the machine room safety signal, emergency electric safety signal and door bypass signal of the upper car elevator, and the second detection signal includes the machine room safety signal, emergency electric safety signal and door bypass signal of the lower car elevator.

[0009] in addition,

[0010] The dual-car elevator safety management system further includes an upper car elevator control cabinet and a lower car elevator control cabinet installed in the elevator machine room and connected to the safety cabinet. The upper car elevator control cabinet is also connected to the safety device of the upper car elevator installed in the elevator machine room, and the lower car elevator control cabinet is also connected to the safety device of the lower car elevator installed in the elevator machine room. The safety cabinet collects the machine room safety signal, emergency electric safety signal, and door bypass signal of the upper car elevator through the upper car elevator control cabinet, and collects the machine room safety signal, emergency electric safety signal, and door bypass signal of the lower car elevator through the lower car elevator control cabinet.

[0011] In addition, the safety device includes safety devices installed in the cars of the upper car elevator and the lower car elevator respectively. The first detection signal also includes the detection signal of the safety device installed in the car of the upper car elevator and the car maintenance signal. The second detection signal also includes the detection signal of the safety device installed in the car of the lower car elevator and the car maintenance signal.

[0012] In addition, the dual-car elevator safety management system also includes an upper car elevator safety plate installed on the top of the upper car elevator and a lower car elevator safety plate installed on the top of the lower car elevator. Both the upper and lower car elevator safety plates are connected to the safety cabinet. The upper car elevator safety plate is also connected to a safety device installed in the car of the upper car elevator, and the lower car elevator safety plate is also connected to a safety device installed in the car of the lower car elevator. The safety cabinet collects detection signals and car maintenance signals from the safety device installed in the car of the upper car elevator through the upper car elevator safety plate, and collects detection signals and car maintenance signals from the safety device installed in the lower car elevator through the lower car elevator safety plate.

[0013] In addition, the safety device also includes safety devices installed at the pits of the upper and lower elevator cars respectively. The first detection signal also includes the detection signal of the safety device installed at the pit of the upper elevator car and the pit inspection signal. The second detection signal also includes the detection signal of the safety device installed at the pit of the lower elevator car and the pit inspection signal.

[0014] In addition, the dual-car elevator safety management system also includes a pit safety plate installed in the pit. The pit safety plate is connected to the safety cabinet. The pit safety plate is also connected to the safety devices installed in the pit of the upper car elevator and the pit of the lower car elevator, respectively. The safety cabinet collects the detection signals and pit maintenance signals of the safety devices installed in the pit of the upper car elevator, as well as the detection signals and pit maintenance signals of the safety devices installed in the pit of the lower car elevator, through the pit safety plate.

[0015] In addition, the system also includes a first position sensor installed on the upper elevator car and a second position sensor installed on the lower elevator car. Both the first and second position sensors are connected to the safety cabinet. The first position sensor is used to collect the position and speed information of the upper elevator car and send the position and speed information of the upper elevator car to the safety cabinet. The second position sensor is used to collect the position and speed information of the lower elevator car and send the position and speed information of the lower elevator car to the safety cabinet. The safety cabinet is used to send safety commands to the safety device of the other elevator car based on the position and speed information collected by the first and second position sensors.

[0016] In addition, both the first position sensor and the second position sensor include a magnetic ruler position sensor and a QR code strip sensor.

[0017] In addition, the same type of position sensor for the upper car elevator and the lower car elevator are respectively set at the same position on the car top of the upper car elevator and the lower car elevator, and the same type of position sensor uses the same code strip. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the structure of a dual-car elevator safety management system according to an embodiment of this application. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of a dual-car elevator safety management system according to an embodiment of this application. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of a dual-car elevator safety management system according to an embodiment of this application. Figure 3 ;

[0022] Figure 4 This is a positional schematic diagram of a position sensor according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the structure of a dual-car elevator safety management system according to an embodiment of this application. Figure 4 . Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this application to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0025] One embodiment of this application relates to a safety management system for a dual-car elevator, including a safety cabinet installed in the elevator machine room, multiple safety devices installed in the upper car, and multiple safety devices installed in the lower car. The safety cabinet is connected to the safety devices in the upper car and the lower car respectively. Therefore, the safety cabinet can detect whether the safety device in any car of the dual-car elevator is activated. Each safety device has a corresponding safety function. For the same safety function, the upper car and the lower car are each equipped with a safety device having that safety function. Therefore, if the safety device in one car of the dual-car elevator is activated, that car's safety circuit is broken. When open, the safety cabinet collects the first detection signal from the safety device in the upper car that has the same safety function as the activated safety device, and the second detection signal from the safety device in the lower car that has the same safety function as the activated safety device. Then, based on either the first or second detection signal, the safety cabinet uses a pre-stored safety function interaction table to determine whether the activated safety device simultaneously controls the other car in the two-car elevator, i.e., whether the safety circuit controlling the other car is also disconnected. If it is determined that the other car in the two-car elevator is being controlled, a safety command is sent to the safety device in the other car. Therefore, this application can simultaneously control both the upper and lower car elevators without requiring two safety devices for one safety function in one car, making it easy to implement and beneficial for maintenance personnel to inspect and troubleshoot elevators.

[0026] The implementation details of the dual-car elevator safety management system in this embodiment are described below. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0027] The structure of the dual-car elevator safety management system in this embodiment can be as follows: Figure 1 As shown, the system includes: a safety cabinet 1 installed in the machine room, a safety device 2 installed in the upper elevator car, and a safety device 3 installed in the lower elevator car. The safety cabinet 1 is connected to the safety device 2 installed in the upper elevator car and the safety device 3 installed in the lower elevator car, respectively. There are multiple safety devices 2 installed in the upper elevator car and multiple safety devices 3 installed in the lower elevator car (only one safety device 2 and one safety device 3 are shown in the figure). Each safety device has a specific safety function, and for the same safety function, the upper elevator car and the lower elevator car are each equipped with one safety device having that function. That is, for the same safety function, the upper elevator car is equipped with one safety device 2 having that function, and the lower elevator car is equipped with one safety device 3 having that function.

[0028] Specifically, since the safety cabinet 1 is connected to the safety device 2 installed in the upper elevator car and the safety device 3 installed in the lower elevator car, the activation of the safety device in any one car of the double-car elevator can be detected by the safety cabinet 1. When the safety cabinet 1 detects activation of the safety device in one car of the double-car elevator, it collects the first detection signal of the safety device with the same safety function as the activated safety device in the upper elevator car, and the second detection signal of the safety device with the same safety function as the activated safety device in the lower elevator car. It can be understood that if the safety cabinet 1 detects activation of the safety device in the upper elevator car, it will simultaneously collect the first detection signal of the safety device 2 in the upper elevator car and the second detection signal of the safety device 3 in the lower elevator car; similarly, if the safety cabinet 1 detects activation of the safety device 3 in the lower elevator car, it will simultaneously collect the second detection signal of the safety device 2 in the lower elevator car and the first detection signal of the safety device 3 in the upper elevator car.

[0029] Since the activation of the safety device in one car of a two-car elevator indicates that the safety circuit of that car has been disconnected, thus enabling the elevator to stop, in this embodiment, after acquiring the first and second detection signals, the safety cabinet 1, based on the first or second detection signal, uses a pre-stored safety function interaction table in the safety cabinet 1 to determine whether the activated safety device should simultaneously control the other car in the two-car elevator. That is, it determines whether it is necessary to simultaneously control both cars of the two-car elevator to stop. If it is determined that the other car should be controlled, a safety command is sent to the safety device of the other car, thereby causing the other car to also enter a safe state, i.e., the other car stops operating.

[0030] In other words, the safety function interaction table determines whether, when the safety device in one car activates, it is necessary to simultaneously control the other car through the activated safety device. For example, the detection signal collected by safety cabinet 1, either the first or second detection signal, comes from the safety device in one of the cars of the elevator that detects loose traction steel wire ropes. Loose traction steel wire ropes pose a risk of interference between the two-car elevators. If the other car continues to operate, further mechanical failures may occur due to mechanical interference. Therefore, this failure is set as a joint action in the safety function interaction table within the safety cabinet. Thus, when the traction steel wire rope of either car is detected to be activated, safety cabinet 1 controls the corresponding elevator's safety device to activate, stopping the corresponding car. If the safety device stops the operation of another elevator car, it can simultaneously control the operation of the other elevator car, causing it to stop as well. For example, if the first or second detection signal collected by the safety cabinet 1 is a door closing detection signal for one of the elevator cars, when one elevator car is normally opening or closing its door, the safety device of the elevator corresponding to that door will synchronously close or open the door. According to the safety function interaction table inside the safety cabinet 1, the detection function of the normally open door is not a interaction function and will not affect the other elevator car. Therefore, the safety device will not simultaneously control the operation of the other elevator car.

[0031] In its implementation, after detecting the activation of any safety device in either of the two elevator cars in a dual-car elevator system and collecting the first and second detection signals, the safety cabinet 1 determines which elevator car's safety device activated based on these signals. It then retrieves a pre-stored safety function interaction table from the safety cabinet 1. This table includes interaction tables for safety devices under normal conditions and those under maintenance. Based on these tables, the cabinet determines whether the car whose safety device activated is in normal or maintenance mode, and then decides whether to send a safety command to the other car.

[0032] In some embodiments, the safety device includes a safety device for the upper car elevator and a safety device for the lower car elevator installed in the elevator machine room. The first detection signal includes the machine room safety signal, emergency electric safety signal, and door bypass signal of the upper car elevator. The second detection signal includes the machine room safety signal, emergency electric safety signal, and door bypass signal of the lower car elevator. In practice, the first and second detection signals also include various other types of detection signals for the upper and lower car elevators, such as speed governor signals. The machine room safety signal, emergency electric safety signal, and door bypass signal mentioned above are merely examples, and this embodiment does not limit their application. In this case, the dual-car elevator safety management system also includes an upper car elevator control cabinet 21 and a lower car elevator control cabinet 31, such as... Figure 2 As shown, the upper car elevator control cabinet 21 and the lower car elevator control cabinet 31, like the safety cabinet 1, are installed in the elevator machine room and are both connected to the safety cabinet 1. The upper car elevator control cabinet 21 is also connected to the safety device 2 of the upper car elevator installed in the elevator machine room, and the lower car elevator control cabinet 31 is also connected to the safety device 3 of the lower car elevator installed in the elevator machine room. The safety cabinet 1 collects machine room safety signals, emergency electric safety signals, and door bypass signals of the upper car elevator through the upper car elevator control cabinet 21, and collects machine room safety signals, emergency electric safety signals, and door bypass signals of the lower car elevator through the lower car elevator control cabinet 31.

[0033] In some embodiments, the safety device includes safety devices respectively installed in the cars of the upper and lower elevator cars. In this case, the first detection signal also includes the detection signal of the safety device installed in the car of the upper elevator car and a car maintenance signal, and the second detection signal also includes the detection signal of the safety device installed in the car of the lower elevator car and a car maintenance signal. In this case, the dual-car elevator safety management system also includes an upper elevator safety plate 22 and a lower elevator safety plate 32, such as... Figure 3As shown, the upper elevator safety plate 22 is installed on the top of the upper elevator car, and the lower elevator safety plate 32 is installed on the top of the lower elevator car. Both the upper elevator safety plate 22 and the lower elevator safety plate 32 are connected to the safety cabinet 1 via a Controller Area Network (CAN) bus. The upper elevator safety plate 22 is also connected to the upper elevator safety device 2, and the lower elevator safety plate 32 is also connected to the lower elevator safety device 3. In fact, the upper elevator safety plate 22 is connected to the safety device 2 installed in the upper elevator car, and the lower elevator safety plate 32 is connected to the safety device 3 installed in the lower elevator car. The safety cabinet 1 collects the detection signals and car maintenance signals of the safety devices installed in the car of the upper elevator through the upper elevator safety plate 22, and collects the detection signals and car maintenance signals of the safety devices installed in the car of the lower elevator through the lower elevator safety plate 32.

[0034] In some embodiments, the safety device further includes safety devices respectively installed in the pits of the upper and lower elevator cars. In this case, the first detection signal also includes the detection signal of the safety device installed in the pit of the upper elevator car and a pit maintenance signal, and the second detection signal also includes the detection signal of the safety device installed in the pit of the lower elevator car and a pit maintenance signal. In this case, the dual-car elevator safety management system also includes, for example... Figure 3 The pit safety plate 41 shown is installed in the pit and connected to the safety cabinet 1 via a CAN bus. The pit safety plate 41 is also connected to the safety device 2 of the upper elevator car and the safety device 3 of the lower elevator car. Specifically, the pit safety plate 41 is connected to the safety device 2 of the upper elevator car installed in the pit of the upper elevator car, and to the safety device 2 of the lower elevator car installed in the pit of the lower elevator car. The safety cabinet 1 uses the pit safety plate 41 to collect the detection signals and pit maintenance signals from the safety devices installed in the pit of the upper and lower elevator cars.

[0035] In a specific implementation, when the safety device of either car in the double-car elevator is activated, the safety cabinet 1 determines whether to control the other car in the double-car elevator based on the machine room safety signal, emergency electric safety signal, door bypass signal, detection signal and car maintenance signal of the safety device installed in the car of the upper car, detection signal and pit maintenance signal of the safety device installed in the pit of the upper car, and the machine room safety signal, emergency electric safety signal, door bypass signal, detection signal and car maintenance signal of the safety device installed in the car of the lower car, detection signal and pit maintenance signal of the safety device installed in the pit of the lower car.

[0036] In some embodiments, the dual-car elevator safety management system further includes a first position sensor 23 installed on the upper car and a second position sensor 33 installed on the lower car. Both the first position sensor 23 and the second position sensor 33 are connected to the safety cabinet 1 via an RS485 bus. The first position sensor 23 is installed on the top of the upper car, and the second position sensor 33 is installed on the top of the lower car. The first position sensor 23 collects the position and speed information of the upper car and sends this information to the safety cabinet 1. The second position sensor 33 collects the position and speed information of the lower car and sends this information to the safety cabinet 1. This allows the safety cabinet 1 to determine whether to send a safety command to the safety device in the other car when it needs to control the operation of a safety device with position-speed related safety functions in the dual-car elevator, based on the position and speed information collected by the first and second position sensors, and in conjunction with the aforementioned safety function interaction table. The first position sensor 23 and the second position sensor 33 include a magnetic scale position sensor and a QR code strip sensor. That is, two position sensors (magnetic scale position sensor and QR code strip sensor) are installed in the upper car elevator, and two position sensors (magnetic scale position sensor and QR code strip sensor) are also installed in the lower car elevator. The code strip of the magnetic scale position sensor is magnetically encoded, and the code strip of the QR code sensor is QR code encoded.

[0037] In one example, if the same type of position sensor in the first position sensor 23 and the second position sensor 33 is installed at the same position on the car top of the upper elevator car and the car top of the lower elevator car, then the same type of position sensor can use the same code strip. For example... Figure 4As shown, the first position sensor 23 located on the top of the upper elevator car includes a magnetic ruler position sensor PS1_1 and a QR code strip sensor PS1_2, and the second position sensor 33 located on the top of the lower elevator car includes a magnetic ruler position sensor PS2_1 and a QR code strip sensor PS2_2. PS1_1 and PS1_2 are located at the same position on the top of the upper and lower elevator cars, respectively, so they can use the same QR code strip. PS2_1 and PS2_2 are located at the same position on the top of the upper and lower elevator cars, respectively, so they can use the same QR code strip.

[0038] In specific implementations, the safety cabinet 1 described in any of the above embodiments can output a safety execution signal SAC (upper SAC_I, upper SAC_O). The two ends (I, O) of this safety signal are connected in series with the safety chain of the upper elevator car to replace the action of the safety device 2 of the upper elevator car. This can be achieved by disconnecting the safety execution signal SAC (upper SAC_I, upper SAC_O). The safety cabinet 1 can also output a safety execution signal SAC (lower SAC_I, lower SAC_O). The two ends (I, O) of this safety signal are connected in series with the safety chain of the lower elevator car to replace the action of the safety device 3 of the lower elevator car. This can also be achieved by disconnecting the safety execution signal SAC (lower SAC_I, lower SAC_O). In other words, if the safety cabinet 1 determines to control the safety device of the other car in a two-car elevator, it only needs to disconnect the safety signal SAC of that car.

[0039] In one embodiment, the dual-car elevator safety management system of this application is as follows: Figure 5 As shown in the figure (only a portion of the connections are shown), Figure 5 The contents shown are the same as those in the above embodiments, and will not be repeated here.

[0040] It should be noted that the examples described above in this embodiment are merely illustrative for ease of understanding and do not constitute a limitation on the technical solution of the present invention.

[0041] It is worth mentioning that all modules involved in this embodiment are logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this application, this embodiment does not introduce units that are not closely related to solving the technical problems proposed in this application; however, this does not mean that other units are absent in this embodiment.

[0042] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A safety management system for a dual-car elevator, characterized in that, include: The system includes a safety cabinet installed in the elevator machine room, multiple safety devices installed in the upper elevator car, and multiple safety devices installed in the lower elevator car. The safety cabinet is connected to the safety devices in the upper elevator car and the lower elevator car, respectively. Each safety device has a corresponding safety function, and for the same safety function, the upper elevator car and the lower elevator car are each equipped with a safety device having that safety function. The safety cabinet is used to, when the safety device of one car in the double-car elevator is detected to have activated, collect a first detection signal from a safety device in the upper car elevator that has the same safety function as the activated safety device, and a second detection signal from a safety device in the lower car elevator that has the same safety function as the activated safety device. Based on the first or second detection signal, the cabinet uses a pre-stored safety function interaction table to determine whether the activated safety device should simultaneously control the other car in the double-car elevator. If it is determined that the other car in the double-car elevator should be controlled simultaneously, a safety command is sent to the safety device of the other car.

2. The dual-car elevator safety management system according to claim 1, characterized in that, The safety device includes the safety device for the upper car elevator and the safety device for the lower car elevator installed in the elevator machine room; the first detection signal includes the machine room safety signal, emergency electric safety signal and door bypass signal of the upper car elevator, and the second detection signal includes the machine room safety signal, emergency electric safety signal and door bypass signal of the lower car elevator.

3. The dual-car elevator safety management system according to claim 2, characterized in that, The dual-car elevator safety management system also includes an upper car elevator control cabinet and a lower car elevator control cabinet installed in the elevator machine room and connected to the safety cabinet. The upper car elevator control cabinet is also connected to the safety device of the upper car elevator installed in the elevator machine room, and the lower car elevator control cabinet is also connected to the safety device of the lower car elevator installed in the elevator machine room. The safety cabinet collects the machine room safety signal, emergency electric safety signal, and door bypass signal of the upper elevator car through the upper elevator car control cabinet, and collects the machine room safety signal, emergency electric safety signal, and door bypass signal of the lower elevator car through the lower elevator car control cabinet.

4. The dual-car elevator safety management system according to claim 1, characterized in that, The safety device includes safety devices installed in the cars of the upper and lower elevators respectively. The first detection signal also includes the detection signal of the safety device installed in the car of the upper elevator and the car maintenance signal. The second detection signal also includes the detection signal of the safety device installed in the car of the lower elevator and the car maintenance signal.

5. The dual-car elevator safety management system according to claim 4, characterized in that, The dual-car elevator safety management system also includes an upper car elevator safety plate installed on the top of the upper car elevator and a lower car elevator safety plate installed on the top of the lower car elevator. Both the upper car elevator safety plate and the lower car elevator safety plate are connected to the safety cabinet. The upper car elevator safety plate is also connected to a safety device installed in the car of the upper car elevator, and the lower car elevator safety plate is also connected to a safety device installed in the car of the lower car elevator. The safety cabinet collects the detection signals and car maintenance signals of the safety devices installed in the car of the upper elevator through the upper elevator safety plate, and collects the detection signals and car maintenance signals of the safety devices installed in the car of the lower elevator through the lower elevator safety plate.

6. The dual-car elevator safety management system according to claim 1, characterized in that, The safety device also includes safety devices installed at the pits of the upper and lower elevator cars respectively. The first detection signal also includes the detection signal of the safety device installed at the pit of the upper elevator car and the pit inspection signal. The second detection signal also includes the detection signal of the safety device installed at the pit of the lower elevator car and the pit inspection signal.

7. The dual-car elevator safety management system according to claim 6, characterized in that, The dual-car elevator safety management system also includes a pit safety plate installed in the pit, which is connected to the safety cabinet. The pit safety plate is also connected to a safety device installed in the pit of the upper car elevator and a safety device installed in the pit of the lower car elevator. The safety cabinet collects the detection signals and pit maintenance signals of the safety device installed in the pit of the upper elevator car, as well as the detection signals and pit maintenance signals of the safety device installed in the pit of the lower elevator car, through the pit safety plate.

8. The safety management system for a double-car elevator according to any one of claims 1 to 7, characterized in that, The system also includes a first position sensor installed in the upper elevator car and a second position sensor installed in the lower elevator car, both of which are connected to the safety cabinet. The first position sensor is used to collect the car position and speed information of the upper car elevator and send the car position and speed information of the upper car elevator to the safety cabinet. The second position sensor is used to collect the car position and speed information of the lower car elevator and send the car position and speed information of the lower car elevator to the safety cabinet. The safety cabinet is used to send safety commands to the safety actuator of the other elevator car based on the position and speed information collected by the first position sensor and the position and speed information collected by the second position sensor.

9. The safety management system for a dual-car elevator according to claim 8, characterized in that, Both the first position sensor and the second position sensor include a magnetic ruler position sensor and a QR code strip sensor.

10. The safety management system for a dual-car elevator according to claim 9, characterized in that, The same type of position sensor for the upper car elevator and the lower car elevator are respectively set at the same position on the top of the upper car elevator and the lower car elevator, and the same type of position sensor uses the same code strip.

Images