Elevator control system using safety bus
By adopting a segmented safety chain design and safety bus communication in the elevator control system, the problem of excessively long elevator safety chain cables has been solved, enabling precise fault location and simplified system wiring, thereby improving elevator safety and maintenance efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THYSSENKRUPP ELEVATORS SHANGHAI CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-30
AI Technical Summary
The existing elevator safety chain design results in excessively long cables, making it difficult to detect and locate fault points, which affects the safety, reliability, and maintenance efficiency of high-rise elevators.
A segmented safety chain design is adopted, which divides the safety link of the elevator control system into logically independent segments through a safety bus and uses the safety bus for communication to achieve precise positioning and monitoring of each segment.
It improves the reliability and monitorability of the elevator control system, reduces troubleshooting time and maintenance costs, simplifies the wiring structure, and reduces system complexity and cost.
Smart Images
Figure CN224429885U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevator manufacturing technology, and more specifically, to an elevator control system using a safety bus. Background Technology
[0002] With the development of my country's economy and society and the increasing number of high-rise buildings, elevators have gradually become more widespread. As the number of elevator users grows, the safety and reliability of their operation are also receiving increasing attention.
[0003] The safety chain of an elevator is the foundation of elevator safety. Current safety chains typically use a method of connecting electrical safety devices in series through a single safety chain. This results in excessively long safety chain cables, making it difficult to detect and locate the fault point if any electrical safety device malfunctions.
[0004] To shorten the length of a single safety chain, some existing technologies employ a segmented design, such as designing the safety chain for the hall door lock switch separately. However, as the elevator's lifting height increases, the safety chain length remains excessive.
[0005] Therefore, optimizing the safety chain design and improving the monitoring and maintenance efficiency of the elevator control system are crucial for ensuring the safe and reliable operation of high-rise elevators.
[0006] The above description of the background technology is only for the purpose of facilitating a deeper understanding of the technical solution of this utility model (the technical means used, the technical problems solved, and the technical effects produced, etc.), and should not be regarded as an admission or in any form an implication that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0007] To address the shortcomings of existing technologies, this invention proposes an elevator control system employing a safety bus. By introducing a segmented safety chain design, the elevator control system using a safety bus significantly improves its reliability and monitorability. Compared to the traditional single long chain structure, the safety link can be divided into logically independent segments, allowing for precise location of the specific segment where a fault occurs, thereby reducing troubleshooting time and maintenance costs for the elevator control system.
[0008] Furthermore, elevator control systems employing safety buses can shorten cable lengths by utilizing safety buses, which not only reduces system complexity but also simplifies the wiring structure and complexity, thereby reducing the cost of the elevator control system and improving installation and maintenance efficiency.
[0009] An elevator control system employing a safety bus according to an exemplary embodiment of the present invention may include: a car top safety plate and a control cabinet safety plate. The car top safety plate may be electrically connected to at least one car top safety chain and communicatively connected to the safety bus. The car top safety plate may be configured to acquire the status information of the car top safety chain. The control cabinet safety plate may be electrically connected to at least one control cabinet safety chain and communicatively connected to the safety bus. The control cabinet safety plate may be configured to acquire the status information of the control cabinet safety chain and acquire the status information of the car top safety chain through the safety bus. Based on the acquired status information of the control cabinet safety chain and the car top safety chain, it is determined whether the status of the car top safety chain and the control cabinet safety chain is abnormal.
[0010] Preferably, the car roof safety plate can be installed in the car roof maintenance box, and each car roof safety chain can include one or more car roof electrical safety devices connected in series. The car roof safety chain can be segmented according to function, so that car roof electrical safety devices with the same or similar functions are connected in series in one car roof safety chain; the control cabinet safety plate can be installed in the control cabinet, and each control cabinet safety chain can include one or more control cabinet electrical safety devices connected in series. The control cabinet safety chain can be segmented according to function, so that control cabinet electrical safety devices with the same or similar functions are connected in series in one control cabinet safety chain.
[0011] Preferably, the control cabinet safety panel may include a safety output module, which can be electrically connected to the braking unit of the elevator system. The control cabinet safety panel may be further configured to: when it is determined that the status of the car top safety chain or the control cabinet safety chain is abnormal, use the safety output module to cut off the power supply to the braking unit.
[0012] Preferably, the safety output module may include at least one normally closed contact, which may be electrically connected to the braking unit. The control cabinet safety board may be further configured to disconnect the normally closed contact when the control cabinet safety board detects an abnormal state of the car top safety chain or the control cabinet safety chain.
[0013] Preferably, the elevator control system using a safety bus may further include a control device, which may include a main control unit. The main control unit may have a safety module, and the safety board of the control cabinet may be communicatively connected to the safety module via the safety bus for information exchange between the elevator system and the safety board of the control cabinet.
[0014] Preferably, the control cabinet safety panel can be further configured to be electrically connected to an emergency electric device, which may include an emergency electric device safety chain and an emergency electric running direction button. The control cabinet safety panel can be further configured to acquire the status information of the emergency electric device safety chain and control the power supply of the braking unit based on the status information of the emergency electric device safety chain and the status of the emergency electric running direction button.
[0015] Preferably, the car roof safety plate can be further configured to be electrically connected to the car roof maintenance and operation device. The car roof maintenance and operation device may include a car roof maintenance and operation device safety chain and a car roof maintenance and operation direction button. The control cabinet safety plate can be further configured to obtain the status information of the car roof maintenance and operation device safety chain through a safety bus, and control the power supply of the braking unit according to the status information of the car roof maintenance and operation device safety chain and the status of the car roof maintenance and operation direction button.
[0016] Preferably, the car roof safety panel can be further configured to be electrically connected to the positioning device, and the control cabinet safety panel can be further configured to acquire the position information of the positioning device through the safety bus, and control the operation of the safety output module according to the acquired position information.
[0017] Preferably, the elevator control system employing a safety bus may further include: a pit safety plate, which is electrically connected to at least one pit safety chain and communicatively connected to the safety bus, and the pit safety plate is configured to acquire the status information of the pit safety chain; the control cabinet safety plate may be further configured to acquire the status information of the pit safety plate through the safety bus, and control the power supply of the braking unit based on the acquired status information of the pit safety chain, the status information of the control cabinet safety chain, and the status information of the car top safety chain.
[0018] Preferably, the pit safety plate can be further configured to be electrically connected to the pit maintenance and operation device, the pit maintenance and operation device may include a pit maintenance and operation device safety chain and a pit maintenance and operation direction button, and the control cabinet safety plate can be further configured to obtain the status information of the pit maintenance and operation device safety chain through the safety bus, and control the power supply of the braking unit according to the status information of the pit maintenance and operation device safety chain and the status of the pit maintenance and operation direction button.
[0019] The present invention adopts the above technical solution, which has the following beneficial effects:
[0020] The elevator control system employing a safety bus according to an exemplary embodiment of this utility model significantly improves the reliability and monitorability of the elevator control system by introducing a segmented safety chain design. Compared to the traditional single long chain structure, the segmented design divides the safety link into logically independent segments. This architecture enables the system to accurately locate the specific segment where a fault occurs, thereby reducing the troubleshooting time and maintenance costs of the elevator control system.
[0021] Furthermore, the elevator control system employing a safety bus according to an exemplary embodiment of the present invention shortens the length of the cables required within the system by utilizing the safety bus, which not only reduces system complexity but also simplifies the wiring structure and complexity of the system, thereby reducing the cost of the elevator control system and improving installation and maintenance efficiency. Attached Figure Description
[0022] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. For clarity, the same components in different drawings are shown with the same reference numerals. It should be noted that the drawings are for illustrative purposes only and are not necessarily drawn to scale. In these drawings:
[0023] Figure 1 This is a schematic diagram of an elevator control system employing a safety bus according to an exemplary embodiment of the present invention.
[0024] Figure 2 This is a connection diagram of the control cabinet safety panel and the control cabinet electrical safety device according to an exemplary embodiment of the present utility model.
[0025] Figure 3 This is a schematic diagram of the basic architecture of the control cabinet safety panel according to an exemplary embodiment of the present utility model.
[0026] Figure 4 This is a schematic diagram of an elevator control system employing a safety bus according to another exemplary embodiment of the present invention.
[0027] Figure 5 This is a schematic diagram of an elevator control system employing a safety bus according to another exemplary embodiment of the present invention.
[0028] 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.
[0029] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation
[0030] The following provides a detailed description of the implementation scheme of this utility model. This implementation scheme is carried out based on the technical solution of this utility model and provides detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following implementation scheme.
[0031] Figure 1 This is a schematic diagram of an elevator control system employing a safety bus according to an exemplary embodiment of the present invention. Figure 2 This is a connection diagram of the control cabinet safety panel and the control cabinet electrical safety device according to an exemplary embodiment of the present utility model.
[0032] Reference Figure 1 An elevator control system employing a safety bus according to an exemplary embodiment of this utility model may include: a car top safety plate 050 and a control cabinet safety plate 030. The car top safety plate 050 and the control cabinet safety plate 030 may be communicatively connected to the safety bus 070, respectively.
[0033] The Safety Bus 070 can employ a real-time communication bus compliant with industrial safety standards, including but not limited to CANopenSafety, PROFIsafe, SafetyBUS p, and EtherCAT Safety. The Safety Bus 070 is responsible for reliably and in real-time transmitting safety-related signals and status information between safety boards.
[0034] In an exemplary embodiment of the present invention, the entire elevator safety chain can be classified into a car top safety chain and a control cabinet safety chain according to function and location. That is, the car top safety chain and the control cabinet safety chain can constitute the entire elevator safety chain.
[0035] The car roof safety plate 050 can be installed in the car roof inspection box inside the car and can be configured to be electrically connected to at least one car roof safety chain. The car roof safety plate 050 can be configured to acquire the status information of the car roof safety chain.
[0036] Each of at least one car top safety chain can be connected to a car top safety plate 050, and each car top safety chain may include one or more car top electrical safety devices 060 connected in series. The car top electrical safety device 060 may include one or more safety contacts, safety circuits, and programmable electronic safety-related systems or combinations thereof. Typically, the car top electrical safety device 060 may include safety switches located on the car, such as a car top emergency stop switch, safety window switch, car top maintenance switch, and car door lock.
[0037] In an exemplary embodiment of this utility model, the car roof safety chain can be designed in segments, that is, segmented according to function, so that car roof electrical safety devices with the same or similar functions can be connected in series in one car roof safety chain, thereby enabling independent detection and monitoring of each car roof safety chain. However, this utility model is not limited to this; each car roof electrical safety device can also use a separate car roof safety chain to facilitate on-site debugging and troubleshooting.
[0038] The control cabinet safety board 030 can be installed in the control cabinet outside the car and can be configured to be electrically connected to at least one control cabinet safety chain. The control cabinet safety board 030 can be configured to acquire the status information of the control cabinet safety chain and can acquire the status information of the car top safety chain through the safety bus 070, thereby determining whether the status of the car top safety chain and the control cabinet safety chain is abnormal based on the acquired status information of the control cabinet safety chain and the car top safety chain.
[0039] Each link of at least one control cabinet safety chain can be connected to a control cabinet safety panel 030. Each control cabinet safety chain may include one or more control cabinet electrical safety devices 040 connected in series. The control cabinet electrical safety device 040 may include one or more safety contacts, safety circuits, and programmable electronic safety-related systems or combinations thereof. Typically, the control cabinet safety panel 030 may include safety switches located outside the car in the machine room, hoistway, and pit, such as control cabinet emergency stop switches, emergency electric operation switches, emergency mechanical device switches, pit emergency stop switches, speed governor tensioner switches, pit ladder switches, tensioning device switches, pit access door switches, and hall door locks.
[0040] In an exemplary embodiment of this utility model, the control cabinet safety chain can adopt a segmented design, that is, segmented according to function, so that control cabinet electrical safety devices with the same or similar functions can be connected in series in a control cabinet safety chain, thereby enabling independent detection and monitoring of each control cabinet safety chain. However, this utility model is not limited to this; each control cabinet electrical safety device can also use a separate control cabinet safety chain to facilitate on-site debugging and troubleshooting.
[0041] In the following description, the connection relationship between the control cabinet safety panel 030 and the control cabinet electrical safety device 040 is illustrated using the control cabinet safety panel 030 as an example. In exemplary embodiments of this utility model, such as... Figure 2As shown, the safety switches connected to the control cabinet safety board 030 are functionally distributed in four safety chains 210 to 240. The emergency stop switch and traction machine protective cover switch can be connected in series in the control cabinet safety chain 210, and can also be connected in series to the I / O module 250 of the control cabinet safety board 030; the upper limit switch and speed limiter switch can be connected in series in the control cabinet safety chain 220, and can also be connected in series to the I / O module 250 of the control cabinet safety board 030; one or more front hall door lock switches can be connected in series in the control cabinet safety chain 230, and can also be connected in series to the I / O module 250 of the control cabinet safety board 030; one or more rear hall door lock switches can be connected in series in the control cabinet safety chain 240, and can also be connected in series to the I / O module 250 of the control cabinet safety board 030.
[0042] Safety chains 210, 220, 230, and 240 of the control cabinet are configured for separate detection and monitoring, facilitating on-site commissioning and troubleshooting. Safety chain 220 can be designed to deactivate during emergency electric operation of the elevator.
[0043] By segmenting the control cabinet safety chain according to function, when the control cabinet safety board 030 detects an abnormality in the information of the I / O module 250, it can quickly locate the abnormal safety chain based on the information of the I / O module 250, thereby locating the fault point more quickly.
[0044] The connection relationship between the car roof safety plate 050 and the car roof electrical safety device 060 is similar to that between the control cabinet safety plate 030 and the control cabinet electrical safety device 040, and will not be described in detail here.
[0045] In an exemplary embodiment of this utility model, electrical safety devices can be connected to the safety board nearby based on their location, thereby saving cable length; in addition, some electrical safety devices or combinations thereof with special functions and requiring separate handling can be set in an independent safety chain, thereby facilitating system control.
[0046] The control cabinet safety board 030 can monitor the status of the control cabinet safety chain by detecting the status of the I / O module 250. Furthermore, the control cabinet safety board 030 can also monitor the status of the car top safety chain and / or other safety chains connected to the safety bus 070 via the safety bus 070.
[0047] See back Figure 1The control cabinet safety panel 030 may include a safety output module 020, which may include at least one normally closed contact that can be electrically connected to the braking unit 010 of the elevator system. However, this utility model is not limited to this; the connection between the safety output module 020 and the braking unit 010 may also be achieved through a safety circuit, a programmable electronic safety system, or a combination thereof.
[0048] If the safety panel 030 of the control cabinet detects an abnormality in the status of the car top safety chain, the control cabinet safety chain, or other safety chains, the normally closed contact of the safety output module 020 will open, thereby cutting off the power supply to the braking unit 010 and stopping the car, so as to provide protection independently without the elevator system being involved or damaged.
[0049] In an exemplary embodiment of this utility model, the safety output module 020 may include two normally closed contacts to provide safety redundancy. Furthermore, the car top safety panel, the control cabinet safety panel, and the safety bus may all meet the Safety Integrity Level (SIL) required for functional safety.
[0050] In the following text, the basic architecture of the control cabinet safety board 030 will be described using the control cabinet safety board 030 as an example. Figure 3 This is a schematic diagram of the basic architecture of the control cabinet safety board according to an exemplary embodiment of the present invention. It should be noted that the car top safety board 050 and the control cabinet safety board 030 can be dual-channel safety boards with dual microcontroller units (MCUs), and can include two independent I / O units for connecting to the car top electrical safety device 060 or the control cabinet electrical safety device 040 and the safety bus 070, respectively. This design enables the elevator control system to achieve the SIL required for functional safety, allowing the elevator control system of the present invention, employing a safety bus, to achieve the required safety functions completely independently of the elevator system.
[0051] Specifically, such as Figure 3As shown, the I / O module 250 of the control cabinet safety board 030 may include two independent I / O units, namely, I / O unit 151 and I / O unit 152. One end of the MCU1 of the control cabinet safety board 030 can be electrically connected to I / O unit 151, and the other end of the MCU1 of the control cabinet safety board 030 can be electrically connected to the safety output module 020. I / O unit 151 can be electrically connected to the control cabinet electrical safety device 040 and the safety bus 070, respectively. One end of the MCU2 of the control cabinet safety board 030 can be electrically connected to I / O unit 155, and the other end of the MCU2 of the control cabinet safety board 030 can be electrically connected to the safety output module 020. I / O unit 155 can be electrically connected to the safety bus 070 and the control cabinet electrical safety device 040, respectively.
[0052] Furthermore, MCU1 and MCU2 can be electrically connected to each other to detect the status of the control cabinet safety chain and monitor the status of the car top safety chain via safety bus 070. When MCU1 and MCU2 detect an abnormality in the status of the control cabinet safety chain or the car top safety chain, the normally closed contact of the safety output module 020 opens, thereby stopping the power supply to the braking unit and bringing the car to a stop.
[0053] Figure 4 This is a schematic diagram of an elevator control system employing a safety bus according to another exemplary embodiment of the present invention.
[0054] In another exemplary embodiment of the present invention, the control cabinet safety panel 030 can be communicatively connected to the elevator system control device 110 via a safety bus 070. Alternatively, both the control cabinet safety panel 030 and the car top safety panel 050 can be communicatively connected to the elevator system control device 110 via the safety bus 070. The control device 110 may include a main control unit 080 and other control units 100, and the main control unit 080 may include a safety module and a non-safety module. Specifically, the control cabinet safety panel 030 can be communicatively connected to the safety module of the main control unit 080 via the safety bus 070. Alternatively, both the control cabinet safety panel 030 and the car top safety panel 050 can be communicatively connected to the safety module of the main control unit 080 via the safety bus 070.
[0055] The safety module of the main control unit 080 can communicate with the safety bus 070 and can be configured to communicate with the control cabinet safety board 030 through the safety bus 070 for information exchange between the control device 110 and the control cabinet safety board 030.
[0056] On one hand, the safety module of the main control unit 080 can transmit the speed, position, and other statuses of the elevator system to the control cabinet safety board 030 via the safety bus 070. For example, the control device 110 can send enable signals such as advance switching and re-leveling to the control cabinet safety board 030, thereby allowing the control cabinet safety board 030 to short-circuit the safety output according to the enable signals, thus cooperating to realize functions such as elevator pre-operation, re-leveling, and door circuit detection. If the control cabinet safety board 030 detects an abnormality in the safety chain status, it can disconnect the contacts of the safety output module 020.
[0057] On the other hand, the safety module of the main control unit 080 can acquire signals such as the status of the control cabinet safety chain, the status of the car top safety chain, and the status of the safety output module 020. It can also feed back the status of the control cabinet safety chain, the status of the car top safety chain, and the status of the safety output module 020 to the elevator system's display device in real time, thereby realizing the real-time display and monitoring of the status of the car top electrical safety device, the status of the control cabinet electrical safety device, and the status of the safety output module 020.
[0058] Furthermore, the elevator system can provide feedback such as stopping the elevator, withdrawing from service, and issuing maintenance notices based on the status of the electrical safety devices on the car top and the control cabinet.
[0059] In another exemplary embodiment of this utility model, the non-safety module of the main control unit 080 can communicate with other control units 100, such as elevator control systems and monitoring systems, via a non-safety bus 090. The non-safety module can be used to acquire the status of other control units via the non-safety bus and can feed back the status of other control units to the elevator system in real time, realizing real-time display and monitoring of the status of other control units. The non-safety bus 090 is mainly used to transmit monitoring, status, and management data that does not involve personal safety; its purpose is efficiency and cost control, not functional safety level (SIL) certification. The non-safety bus 090 may include industrial Ethernet (PROFINET / EtherNet / IP), fieldbus (CANopen / PROFIBUS), and dedicated buses (RS-485 / LIN), etc.
[0060] The control cabinet safety board 030 can be further configured to be electrically connected to the emergency electric device 015. The emergency electric device 015 may include an emergency electric device safety chain and an emergency electric running direction button. The control cabinet safety board 030 can be further configured to acquire the status information of the emergency electric device safety chain of the emergency electric device 015, and control the operation of the safety output module 020 based on the status information of the emergency electric device safety chain and the status of the emergency electric running direction button, thereby controlling the power supply to the braking unit 010.
[0061] The safety control of emergency electric operation of elevators is described in detail below.
[0062] The emergency electric device 015's emergency electric device safety chain can be equipped with an emergency electric operation switch. When the emergency electric operation switch is off, the output of the safety output module 020 is disconnected, prohibiting the elevator from operating normally. If one of the buttons controlling the emergency electric operation (the emergency electric operation safety button is set to prevent misoperation, but this utility model is not limited to this) and controlling the up and down directions is activated simultaneously, the control cabinet safety board 030 can detect that the emergency electric device 015's emergency electric device safety chain meets the emergency electric operation conditions, the contacts of the safety output module 020 are closed, and the elevator operates in emergency electric mode. If the emergency electric operation safety button and one of the controls for the up and down directions are not activated simultaneously, the control cabinet safety board 030 can detect that the emergency electric device 015's emergency electric device safety chain does not meet the operation conditions, the contacts of the safety output module 020 are disconnected, and the elevator cannot operate in emergency electric mode.
[0063] Preferably, switches such as speed limiters, buffers, and safety brakes that need to be short-circuited during emergency electric operation can be placed in the same safety chain to facilitate control of emergency electric operation.
[0064] In another exemplary embodiment of the present invention, the car roof safety plate 050 may be further configured to be electrically connected to the car roof maintenance and operation device 063. The car roof maintenance and operation device 063 may include a car roof maintenance and operation device safety chain and a car roof maintenance and operation direction button. The control cabinet safety plate 030 may be further configured to acquire the status information of the car roof maintenance and operation device safety chain of the car roof maintenance and operation device 063 through the safety bus 070, and control the operation of the safety output module 020 based on the status information of the car roof maintenance and operation device safety chain and the status of the car roof maintenance and operation direction button, thereby controlling the power supply of the braking unit 010.
[0065] The safety control of car top maintenance operations is described in detail below.
[0066] The car top maintenance operation device 063's safety chain can be equipped with a car top maintenance operation switch. When the car top maintenance operation switch is off, the output of the safety output module 020 is disconnected, prohibiting the normal operation of the elevator. If one of the safety buttons controlling the car top maintenance operation (the car top maintenance operation safety button is set to prevent accidental operation, but this utility model is not limited to this) and the up and down buttons controlling the car top maintenance operation direction are activated simultaneously, the control cabinet safety board 030 can monitor the car top maintenance operation through the safety bus 070. If the safety chain of the car top maintenance operation device 063 meets the conditions for car top maintenance operation, the contact of the safety output module 020 is closed, and the elevator can perform car top maintenance operation. If one of the safety buttons controlling the car top maintenance operation and the up and down buttons controlling the direction of car top maintenance operation does not operate simultaneously, the control cabinet safety board 030 can detect through the safety bus 070 that the safety chain of the car top maintenance operation device 063 does not meet the operating conditions, the contact of the safety output module 020 is opened, and the elevator cannot perform car top maintenance operation.
[0067] In another exemplary embodiment of the present invention, the car top safety plate 050 can be further configured to be electrically connected to the position device 066. Correspondingly, the control cabinet safety plate 030 can be further configured to acquire the position information of the position device 066 through the safety bus 070. Specifically, the car top safety plate 050 can have an input interface (not shown) of the position device 066, which can acquire the position information of the car in the hoistway, including leveling and re-leveling information, and may also include, but is not limited to, terminal station information and upper and lower limit information of the hoistway. The control cabinet safety plate 030 can acquire the position information, leveling and re-leveling information, terminal station information, and upper and lower limit information of the hoistway through the safety bus 070, and use it to control the on and off of the safety output module 020 according to the above information, thereby independently realizing the function of protecting the car from accidental movement. This not only independently realizes the function of monitoring the terminal speed of the deceleration buffer, but also saves the cables required to independently transmit this information, thereby reducing the cost of the elevator control system of the present invention.
[0068] Figure 5 This is a schematic diagram of an elevator control system employing a safety bus according to another exemplary embodiment of the present invention.
[0069] In another exemplary embodiment of the present invention, the elevator control system employing a safety bus may further include a pit safety plate 130. The pit safety plate 130 may be communicatively connected to the safety bus 070.
[0070] In another exemplary embodiment of the present invention, the entire elevator safety chain can be classified according to function and location into a car top safety chain, a control cabinet safety chain, and a pit safety chain. That is to say, the car top safety chain, the control cabinet safety chain, and the pit safety chain can constitute the entire elevator safety chain.
[0071] The pit safety plate 130 can be installed outside the car and configured to be electrically connected to at least one pit safety chain. The pit safety plate 130 can be configured to acquire the status information of the pit safety chain. The control cabinet safety plate 030 can be further configured to acquire the status information of the pit safety chain via the safety bus 070, thereby determining whether the status of the pit safety chain is abnormal based on the acquired status information. When the control cabinet safety plate 030 determines that the status of the pit safety chain, car top safety chain, or control cabinet safety chain is abnormal, the power supply to the braking unit can be cut off using the safety output module 020. Specifically, the normally closed contact of the safety output module 020 can be opened, thereby stopping the power supply to the braking unit and stopping the elevator.
[0072] Each of at least one pit safety chain can be connected to a pit safety panel 130, and each pit safety chain can include one or more pit electrical safety devices 140 connected in series. The pit electrical safety device 140 can include one or more safety contacts, safety circuits, and programmable electronic safety-related systems or combinations thereof.
[0073] When configuring the pit safety plate 130, the safety contacts in the pit, such as the pit emergency stop switch, the speed limiter tension wheel switch, the pit ladder switch, the tensioning device switch, and the pit maintenance door switch, can be directly connected to the pit safety plate 130. Furthermore, the pit safety plate 130 can be connected to the control cabinet safety plate 030 via the safety bus 070. This shortens the cable length required for the electrical connection from the pit safety contacts to the control cabinet safety plate 030, thereby reducing the cost of the elevator control system of this utility model.
[0074] In another exemplary embodiment of the present invention, the pit safety plate 130 may be further configured to be electrically connected to the pit maintenance and operation device 120. The pit maintenance and operation device 120 may include a pit maintenance and operation device safety chain and a pit maintenance and operation button. The control cabinet safety plate 030 may be further configured to acquire the status information of the pit maintenance and operation device safety chain of the pit maintenance and operation device 120 through the safety bus 070, and control the operation of the safety output module 020 based on the status information of the pit maintenance and operation device safety chain and the status of the pit maintenance and operation direction button, thereby controlling the power supply of the braking unit 010.
[0075] The safety control of elevator pit maintenance and operation is described in detail below.
[0076] The pit maintenance operation device 120 can be equipped with a pit maintenance operation switch. When the pit maintenance operation switch is turned off, the output of the safety output module 020 is disconnected, prohibiting the normal operation of the elevator. If one of the safety buttons controlling the pit maintenance operation (the safety button for pit maintenance operation is designed to prevent accidental operation, but this utility model is not limited to this) and the up and down buttons controlling the direction of pit maintenance operation are activated simultaneously, the control cabinet safety board 030 can monitor the pit maintenance operation through the safety bus 070. If the safety chain of the pit maintenance operation device 120 meets the pit maintenance operation conditions, the contact of the safety output module 020 is closed, and the elevator can perform pit maintenance operation. If one of the safety buttons controlling the pit maintenance operation and the up and down buttons controlling the pit maintenance operation direction does not operate simultaneously, the control cabinet safety board 030 monitors through the safety bus 070 that the safety chain of the pit maintenance operation device 120 does not meet the operation conditions, the contact of the safety output module 020 is opened, and the elevator cannot perform pit maintenance operation.
[0077] Therefore, the elevator control system using a safety bus according to the exemplary embodiment of this utility model can significantly improve the reliability and monitorability of the elevator control system by introducing a segmented safety chain design. This allows for more precise location of the specific safety chain segment where a fault occurs compared to the traditional single long chain structure, thereby reducing the troubleshooting time and maintenance costs of the elevator control system.
[0078] Furthermore, the elevator control system employing a safety bus according to an exemplary embodiment of the present invention can shorten the length of cables that need to be laid within the system by utilizing the safety bus. This not only reduces system complexity but also simplifies the wiring structure and complexity of the system, thereby improving installation and maintenance efficiency and reducing the cost of the elevator control system.
[0079] The various embodiments of this utility model are not an exhaustive list of all possible combinations, but are intended to describe representative aspects of the utility model, and the contents described in the various embodiments can be applied independently or in two or more combinations.
[0080] The description of the exemplary embodiments presented above is merely illustrative of the technical solutions of this utility model and is not intended to be exhaustive or to limit the utility model to the precise forms described. Obviously, those skilled in the art can make many changes and variations based on the above teachings. The exemplary embodiments were chosen and described to explain the specific principles of this utility model and its practical applications, thereby enabling others skilled in the art to understand, implement, and utilize the various exemplary embodiments of this utility model and their various alternatives and modifications. The scope of protection of this utility model is intended to be defined by the appended claims and their equivalents.
Claims
1. An elevator control system employing a safety bus, characterized in that, include: A car roof safety plate, which is electrically connected to at least one car roof safety chain and communicatively connected to a safety bus, the car roof safety plate being configured to acquire status information of the car roof safety chain; as well as A control cabinet safety board is electrically connected to at least one control cabinet safety chain and communicatively connected to a safety bus. The control cabinet safety board is configured to acquire the status information of the control cabinet safety chain and acquire the status information of the car top safety chain through the safety bus. Based on the acquired status information of the control cabinet safety chain and the car top safety chain, the board determines whether the status of the car top safety chain and the control cabinet safety chain is abnormal.
2. The elevator control system employing a safety bus according to claim 1, characterized in that: The car roof safety plate is installed in the car roof maintenance box, and each car roof safety chain includes one or more car roof electrical safety devices connected in series. The car roof safety chain is segmented according to function, so that car roof electrical safety devices with the same or similar functions are connected in series in one car roof safety chain. The control cabinet safety panel is installed in the control cabinet, and each control cabinet safety chain includes one or more control cabinet electrical safety devices connected in series. The control cabinet safety chain is segmented according to function, so that control cabinet electrical safety devices with the same or similar functions are connected in series in one control cabinet safety chain.
3. An elevator control system employing a safety bus according to claim 1, characterized in that, The control cabinet safety panel includes a safety output module, which is electrically connected to the elevator system's braking unit. The control cabinet safety panel is further configured to: when it is determined that the status of the car top safety chain or the control cabinet safety chain is abnormal, use the safety output module to cut off the power supply to the braking unit.
4. The elevator control system employing a safety bus according to claim 3, characterized in that: The safety output module includes at least one normally closed contact, which is electrically connected to the braking unit. The control cabinet safety board is further configured to disconnect the normally closed contact when it detects an abnormal state of the car top safety chain or the control cabinet safety chain.
5. An elevator control system employing a safety bus as defined in claim 3, characterized in that The system further includes a control device, which comprises a main control unit having a safety module. The control cabinet safety board is connected to the safety module via a safety bus for information exchange between the elevator system and the control cabinet safety board.
6. The elevator control system employing a safety bus according to claim 3, characterized in that: The control cabinet safety panel is further configured to be electrically connected to the emergency electric device. The emergency electric device includes an emergency electric device safety chain and an emergency electric operation direction button. The control cabinet safety panel is further configured to acquire the status information of the emergency electric device safety chain, and control the power supply of the braking unit based on the status information of the emergency electric device safety chain and the status of the emergency electric running direction button.
7. The elevator control system employing a safety bus according to claim 3, characterized in that: The car roof safety plate is further configured to be electrically connected to the car roof maintenance and operation device. The car top maintenance and operation device includes a car top maintenance and operation device safety chain and a car top maintenance and operation direction button. The control cabinet safety board is further configured to acquire the status information of the safety chain of the car top maintenance operation device through the safety bus, and control the power supply of the braking unit according to the status information of the safety chain of the car top maintenance operation device and the status of the car top maintenance operation direction button.
8. The elevator control system employing a safety bus according to claim 3, characterized in that: The car roof safety panel is further configured to be electrically connected to the positioning device. The control cabinet safety board is further configured to acquire the position information of the position device through the safety bus, and control the operation of the safety output module based on the acquired position information.
9. An elevator control system employing a safety bus as defined in claim 3, characterized in that Further includes: A pit safety panel, which is electrically connected to at least one pit safety chain and communicatively connected to a safety bus, the pit safety panel being configured to acquire status information of the pit safety chain; The control cabinet safety board is further configured to acquire the status information of the pit safety board via a safety bus, and control the power supply of the braking unit based on the acquired status information of the pit safety chain, the control cabinet safety chain, and the car roof safety chain.
10. The elevator control system employing a safety bus according to claim 9, characterized in that: The pit safety plate is further configured to be electrically connected to the pit maintenance and operation device. The pit maintenance and operation device includes a pit maintenance and operation safety chain and a pit maintenance and operation direction button. The control cabinet safety board is further configured to acquire the status information of the safety chain of the pit maintenance operation device through the safety bus, and control the power supply of the braking unit according to the status information of the safety chain of the pit maintenance operation device and the status of the pit maintenance operation direction button.