Auxiliary rescue system for double-car elevator

Abstract

The invention relates to an auxiliary rescue system for a double-car elevator, which can effectively reduce the rescue risk and the dependence on the experience of rescue workers by monitoring the running state of a car in real time and providing key data display, and can automatically trigger a speed limiter rope gripper and forcibly stop the car to prevent accidents when detecting the potential collision risk. The standby power supply ensures reliable operation of the system under the condition of power failure, so that effective rescue support is provided under various emergency conditions.

Description

Technical Field

[0001] The invention relates to the technical field of vertical elevators, in particular to an auxiliary rescue system for a double-car elevator. Background Art

[0002] With the acceleration of urbanization and the increasing number of high-rise buildings, elevators, as an indispensable vertical transportation tool in modern buildings, have received more and more attention for their safety and reliability. In recent years, double-car elevators have gradually become the preferred solution for high-rise buildings due to their higher transportation efficiency and smaller hoistway space. However, compared with traditional single-car elevators, double-car elevators have a more complex structure, which also brings greater challenges to rescue work.

[0003] Traditional double-car elevator rescue mainly relies on the rescuer's experience and manual operation, that is, the rescuer needs to judge the position, speed and direction of the car by observing the indicator lights outside the car, the marks on the wire rope, or manually turning the car. This method is highly dependent on the rescuer's experience and judgment, and requires them to have an in-depth understanding of the structure and working principle of the elevator in order to accurately judge the state of the car and take correct operations. This is a huge challenge for inexperienced rescuers; secondly, the rescue process is cumbersome and inefficient. Especially in emergency situations, precious rescue time is often wasted on complex judgments and operations, which may delay the best rescue time; thirdly, during the turning or sliding rescue process, since the brake is in the released state, the elevator lacks an effective braking mechanism, which can easily cause the car to lose control, resulting in a collision accident. This risk is particularly prominent for double-car elevators that share a shaft.

[0004] In order to improve the safety of double-car elevators, some elevator manufacturers have begun to integrate anti-collision systems into elevator systems. For example, Chinese patent CN101687606B discloses an elevator system that can detect the distance between two cars and take braking measures when the distance is too close. However, these existing anti-collision systems are mainly designed for anti-collision needs during normal operation of elevators, and their functions and performance cannot fully meet the special requirements of rescue work. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a dual-car elevator auxiliary rescue system which can effectively reduce the rescue risk and the dependence on the rescuer's experience.

[0006] In order to achieve the above-mentioned object, the present invention designs a dual-car elevator auxiliary rescue system, the elevator includes an upper car and a lower car in the same hoistway, and a hoistway signal device installed in the hoistway to collect the operation data of the upper car and the lower car in real time, and the rescue system includes:

[0007] a data processing module, electrically connected to the shaft signal device, for obtaining at least position data information, running direction data information and speed data information of the upper car and the lower car respectively collected by the shaft signal device, and determining whether there is a collision risk between the upper car and the lower car according to the obtained data information;

[0008] a control module, electrically connected to the speed limiter rope clamp, and controlling the speed limiter rope clamp to actuate to trigger the safety clamp when detecting that the data processing module determines that there is a collision risk, so that the safety clamp forms a braking cooperation with the slide rail;

[0009] A power module, for supplying power to the rescue system, the power module comprising a mains power interface and a manually activated backup power supply;

[0010] Wherein, when the mains power interface has no mains power supply and the backup power supply is manually activated, the backup power supply supplies power to the rescue system, the shaft signal device and the speed limiter rope clamp.

[0011] Preferably, the collision risk includes the real-time distance between the upper car and the lower car, and the data processing module compares the real-time distance with a preset minimum safety distance, and determines that there is a collision risk when the real-time distance is less than the preset minimum safety distance.

[0012] Preferably, the preset minimum safety distance is calculated according to the following formula:

[0013] S=CH+CRF+CJD+SC+SA;

[0014] Among them, S is the minimum safety distance; CH is the outer height of the car; CRF is the height from the top of the car to the guardrail; CJD is the height from the bottom of the car to the lowest component; SC is the guidance distance of the safety clamp; SA is the safety margin distance, SA = 0.3m.

[0015] A further solution is that SC=0.3+0.035V2, where V is the car speed; or SC=0.5+0.035V2, where V is the car speed.

[0016] Preferably, the collision risk includes respective speed thresholds of the upper car and the lower car, and the data processing module compares the speed data information of the upper car and the lower car with the preset speed thresholds, respectively, and determines that there is a collision risk when the speed of either car exceeds the preset speed threshold.

[0017] Preferably, it also includes a warning module electrically connected to the data processing module, and the warning module issues corresponding sound and light warnings when the car speeds of the upper and lower cars exceed a preset speed threshold, the cars reach the leveling position, or the real-time distance is less than a predetermined safety distance or less than a minimum safety distance.

[0018] Preferably, it further comprises a display module electrically connected to the data processing module, wherein the display module displays the position data information, running direction data information and speed data information of the upper car and the lower car respectively in real time.

[0019] Preferably, the display module comprises a display unit and a communication unit, and the communication unit communicates data with the data processing module through wired communication or wireless communication.

[0020] Preferably, the safety clamp is a bidirectional safety clamp.

[0021] The dual-car elevator auxiliary rescue system designed by the present invention can effectively reduce the rescue risk and the dependence on the rescue personnel's experience by monitoring the car operation status in real time and providing key data for display. The system can automatically trigger the speed limiter rope clamp when a potential collision risk is detected, and forcibly stop the car to prevent accidents. The equipped backup power supply ensures the reliable operation of the system in the event of a power outage, thereby providing effective rescue support in various emergency situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a principle block diagram of the double-car elevator auxiliary rescue system provided in an embodiment of the present application.

[0023] Among them: rescue system 100, shaft signal device 200, speed limiter rope clamp 201, safety clamp 202, data processing module 10, control module 20, power module 30, AC power interface 31, backup power supply 32, warning module 40, display module 50, display unit 51, communication unit 52. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] In a pair of proportions provided, the elevator includes an upper car and a lower car in the same shaft, a shaft signal device installed in the shaft to collect the operation data of the upper car and the lower car in real time, and an anti-collision system, wherein the anti-collision system is designed to detect the distance between the two cars according to the car operation data collected by the shaft signal device when the elevator is running, and take braking measures when the distance is too close. However, in the process of implementing the rescue of the car or the car, in order to release the traction mechanism, the brake must be released; at the same time, in order to prevent the accidental start of the elevator from causing danger, the safety circuit must also be cut off. Therefore, even if the anti-collision system itself has power supply conditions, due to the disconnection of the safety circuit, its function will fail and cannot provide safety protection. In this case, the elevator is actually in a state of lack of an effective braking mechanism, and the rescue personnel can only rely on manual control of the movement of the car, and there is a risk of car out of control, especially in a double-car elevator, where the two cars run in the same shaft, this risk will be significantly increased, which is easy to cause serious collision accidents.

[0026] like Figure 1 As shown, the dual-car elevator auxiliary rescue system 100 provided in this embodiment is intended to solve the safety hazard of failure of the anti-collision system due to brake release and safety circuit disconnection during the existing elevator rescue process. Even when the brake is released and the safety circuit is disconnected, the operating status of the upper and lower cars can be continuously monitored, and the speed limiter rope clamp can be triggered to brake the safety clamp when necessary, thereby effectively preventing the car from losing control and ensuring rescue safety.

[0027] The elevator in this embodiment includes an upper car and a lower car in the same hoistway, and a hoistway signal device 200 installed in the hoistway to collect real-time operation data of the upper car and the lower car. The hoistway signal device 200 can use, for example, an absolute encoder to accurately measure the absolute position of the car in the hoistway. The data collection principle is the same as that of the prior art and will not be described in detail here. The rescue system 100 mainly consists of the following three modules:

[0028] The data processing module 10 is electrically connected to the shaft signal device 200, and obtains at least the position data information, running direction data information and speed data information of the upper car and the lower car respectively collected by the shaft signal device 200, and determines whether there is a collision risk between the upper car and the lower car based on the obtained data information.

[0029] In this embodiment, the collision risk includes the real-time distance between the upper car and the lower car. The data processing module 10 compares the real-time distance with the preset minimum safety distance, and determines that there is a collision risk when the real-time distance is less than the preset minimum safety distance.

[0030] In one embodiment, the data processing module 10 has a built-in microprocessor and a memory, and safety parameters such as a minimum safety distance are preset in the memory. The microprocessor performs calculations and judgments based on the preset safety parameters (minimum safety distance) and the real-time acquired elevator operation data. That is, during the implementation of the handwheel or sliding car rescue, the data processing module 10 continuously calculates the real-time distance between the two cars, and compares it with the preset minimum safety distance. When the real-time distance is less than the minimum safety distance, the data processing module 10 determines that there is a collision risk.

[0031] The control module 20 is electrically connected to the speed limiter rope clamp 201. When the data processing module 10 determines that there is a collision risk, the control module 20 controls the speed limiter rope clamp 201 to actuate to trigger the safety clamp 202, so that the safety clamp 202 forms a braking match with the slide rail. In this embodiment, the control module 20 mainly performs the function of sending a control signal immediately after receiving the collision risk signal from the data processing module 10, triggering the speed limiter rope clamp 201 to actuate to clamp the traction rope, forcing the safety clamp 202 to actuate, and firmly fixing the car on the guide rail, thereby preventing the car from continuing to move and effectively preventing the occurrence of a collision accident.

[0032] The power module 30 supplies power to the rescue system 100. The power module 30 includes a mains power interface 31 and a manually activated backup power supply 32. When the mains power interface 31 is not supplied with mains power and the backup power supply 32 is manually activated, the backup power supply 32 supplies power to the rescue system 100, the shaft signal device 200, and the speed limiter rope clamp 201. Under normal circumstances, the rescue system 100 is powered by the mains power interface 31. When the mains power is cut off, the rescue personnel can manually activate the backup power supply 32 to supply power to the rescue system 100, the shaft signal device 200, and the speed limiter rope clamp 201, ensuring that the system can work normally in emergency situations such as power outages, and providing uninterrupted safety protection. In this embodiment, the backup power supply 32 is usually a device that can be independently powered, such as a battery, to ensure its reliability in emergency situations.

[0033] Generally, when there is a power supply, during the process of implementing the rescue of the car by turning the car or sliding the car, the data processing module 10 can be used to obtain the data such as the car position, speed and running direction collected by the shaft signal device 200, so as to help the rescue personnel who implement the rescue of the car by turning the car or sliding the car to directly and clearly understand the running status of the car without relying on the command of others, thereby reducing the requirements for the experience of the rescue personnel and improving the rescue efficiency. Of course, if an emergency occurs during the rescue process, such as the real-time distance between the upper car and the lower car, the car speed is too fast, and there is a risk of collision, the control module 20 will immediately issue a command to trigger the speed limiter rope clamp 201 and the safety clamp 202 to stop the car forcibly to prevent the occurrence of a collision accident.

[0034] In the case of a city power outage, the actual implementation may be affected by environmental factors, such as a complex rescue environment, difficult operation, and a long rescue time. This may cause the UPS power supply that is automatically activated by the anti-collision system in the related art when the city power supply is interrupted to be exhausted, and the shaft signal device 200 cannot obtain the operation data of the car. However, when the rescue arrives or the rescue time needs to be extended, the backup power supply 32 of the power module 30 can be manually activated to provide the necessary working power for the rescue system 100, the shaft signal device 200, and the speed limiter rope clamp 201. Similarly, after the backup power supply 32 is manually activated, the system can continue to obtain the car operation data collected by the shaft signal device 200, analyze and judge through the data processing module 10, and trigger the speed limiter rope clamp 201 and the safety clamp 202 to act through the control module 20 when necessary to ensure the safety of the rescue.

[0035] In this embodiment, in some embodiments, the safety clamp 202 is a bidirectional safety clamp. The bidirectional safety clamp can deal with overspeed or loss of control of the car in both the upward and downward directions to avoid the possibility of failure due to misjudgment, thereby improving the reliability of the system.

[0036] In some embodiments, the preset minimum safety distance is calculated according to the following formula:

[0037] S=CH+CRF+CJD+SC+SA;

[0038] Among them, S is the minimum safety distance; CH is the car outer height; CRF is the height from the car top to the guardrail, that is, the distance from the car top to the top guardrail; CJD is the height from the car bottom to the lowest component, that is, the distance from the car bottom to the lowest component at the bottom of the car; SC is the guidance distance of the safety clamp 202; SA is the safety margin distance, SA = 0.3m. In this way, by comprehensively considering factors such as car size, running speed and safety margin, the minimum safety distance can be calculated more accurately, thereby more effectively preventing the occurrence of collision accidents and improving rescue safety.

[0039] In this embodiment, SC=0.3+0.035V2, V is the car speed; or, SC=0.5+0.035V2, V is the car speed. In practical applications, the calculation of the guidance distance SC of the safety clamp 202 needs to be determined according to the national standard applicable to the safety clamp used in the car. For example, for safety clamps that meet the old national standard, the old national standard 0.3+0.035V2 should be used to calculate SC, and for safety clamps that meet the new national standard, the new national standard 0.5+0.035V2 should be used to calculate SC. In this embodiment, the data processing module 10 can pre-set the national standard version applicable to the safety clamp when the system is installed or configured, and the data processing module 10 can select the corresponding formula according to the preset parameters.

[0040] For example, assuming that the external height CH of a car is 2.5 meters, the height CRF from the car top to the guardrail is 0.2 meters, the height CJD from the car bottom to the lowest component is 0.3 meters, the car speed V is 1 meter / second, and the safety margin distance SA is 0.3 meters. This means that in order to ensure safety, the distance between the two cars must be kept at least 3.835 meters.

[0041] In some embodiments, the collision risk includes the speed thresholds of the upper car and the lower car respectively. The data processing module 10 compares the speed data information of the upper car and the lower car with the preset speed thresholds respectively, and determines that there is a collision risk when the speed of either car exceeds the preset speed threshold.

[0042] Specifically, the data processing module 10 obtains the speed information of each car in real time and compares it with the corresponding speed threshold. If the speed of any car exceeds the preset threshold, even if the distance between the two cars is still greater than the minimum safety distance, it will be determined that there is a risk of collision, because during the real-time elevator turning or sliding rescue process, the car speed will significantly increase the risk of loss of control and collision. By setting the speed threshold, this potential danger can be discovered early, and braking measures such as triggering the speed limiter rope clamp 201 and the safety clamp 202 can be taken in time to effectively prevent accidents.

[0043] In some embodiments, Figure 1 As shown, it also includes an alarm module 40 electrically connected to the data processing module 10. The alarm module 40 sends out corresponding sound and light alarms when the car speeds of the upper and lower cars exceed a preset speed threshold, the cars reach the leveling position, or the real-time distance is less than a predetermined safety distance or less than a minimum safety distance.

[0044] In this embodiment, the warning module 40 effectively improves the safety of rescue by emitting sound and light warning signals, that is, the sound and light warnings can promptly remind rescuers to pay attention to potential dangerous situations, such as the car speed is too fast, the distance is too close, etc., so that rescuers can prepare in advance and take necessary measures to avoid accidents.

[0045] In specific implementation, the warning module 40 can issue different sound and light warnings according to different danger levels or situations. For example, multiple safety distance thresholds can be preset, and different levels of warnings can be issued according to the relationship between the real-time distance and these thresholds. For example, 1.1 times the minimum safety distance can be set as one, that is, when the real-time distance between the two cars is less than the safety distance but still greater than the minimum safety distance, the warning module 40 issues a low-level sound and light warning, such as flashing a yellow light and emitting a low-frequency beep, to remind rescuers that the distance between the two cars is approaching the minimum safety distance and they need to operate with caution; and when the real-time distance is less than the minimum safety distance, the warning module 40 issues a high-level sound and light warning, such as flashing a red light and emitting a high-frequency alarm, indicating that there is a high risk of collision, and at the same time the control module 20 triggers the speed limiter rope clamp 201 and the safety clamp 202 to stop the car.

[0046] In some embodiments, Figure 1 As shown, the display module 50 electrically connected to the data processing module 10 is also included, and the display module 50 displays the position data information, running direction data information and speed data information of the upper and lower cars in real time. In this way, the display module 50 can display the key information such as the position, speed, running direction of the upper and lower cars in real time in a more intuitive way such as graphics, charts or animations, so that rescuers can quickly and accurately understand the running status of the cars and choose a suitable rescue path.

[0047] In some embodiments, Figure 1 As shown, the display module 50 includes a display unit 51 and a communication unit 52, and the communication unit 52 communicates data with the data processing module 10 by wired communication or wireless communication. In this embodiment, through the independent communication unit 52, the display unit 51 can flexibly select wired or wireless communication to communicate data with the data processing module 10, wherein the wired communication method is generally more stable and reliable, while the wireless communication method is more flexible and convenient, and the appropriate communication method can be selected according to the actual situation. In addition, the independent communication unit 52 also provides the possibility of remote monitoring. For example, the communication unit 52 can be connected to the network to transmit the car operation data and rescue information to the remote monitoring center in real time, so that the monitoring personnel can remotely monitor the rescue process and provide necessary support.

[0048] The dual-car elevator auxiliary rescue system provided in this embodiment can effectively reduce the rescue risk and the dependence on the rescue personnel's experience by real-time monitoring of the car operation status and providing key data for display. The system can automatically trigger the speed limiter rope clamp when a potential collision risk is detected, and forcibly stop the car to prevent accidents. The equipped backup power supply ensures the reliable operation of the system in the event of a power outage, thereby providing effective rescue support in various emergency situations.

[0049] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dual-car elevator auxiliary rescue system, the elevator includes an upper car and a lower car in the same hoistway, and a hoistway signal device installed in the hoistway to collect real-time operation data of the upper car and the lower car, characterized in that: The rescue system includes: a data processing module, electrically connected to the shaft signal device, for obtaining at least position data information, running direction data information and speed data information of the upper car and the lower car respectively collected by the shaft signal device, and determining whether there is a collision risk between the upper car and the lower car according to the obtained data information; a control module, electrically connected to the speed limiter rope clamp, and controlling the speed limiter rope clamp to actuate to trigger the safety clamp when detecting that the data processing module determines that there is a collision risk, so that the safety clamp forms a braking cooperation with the slide rail; A power module, for supplying power to the rescue system, the power module comprising a mains power interface and a manually activated backup power supply; Wherein, when the mains power interface has no mains power supply and the backup power supply is manually activated, the backup power supply supplies power to the rescue system, the shaft signal device and the speed limiter rope clamp.

2. The double-car elevator auxiliary rescue system according to claim 1, characterized in that: The collision risk includes the real-time distance between the upper car and the lower car. The data processing module compares the real-time distance with a preset minimum safety distance, and determines that there is a collision risk when the real-time distance is less than the preset minimum safety distance.

3. The double-car elevator auxiliary rescue system according to claim 2, characterized in that: The preset minimum safety distance is calculated according to the following formula: S=CH+CRF+CJD+SC+SA; Among them, S is the minimum safety distance; CH is the outer height of the car; CRF is the height from the top of the car to the guardrail; CJD is the height from the bottom of the car to the lowest component; SC is the guidance distance of the safety clamp; SA is the safety margin distance, SA = 0.3m.

4. The double-car elevator auxiliary rescue system according to claim 3, characterized in that: SC=0.3+0.035V2, V is the car speed; or, SC=0.5+0.035V2, V is the car speed.

5. The double-car elevator auxiliary rescue system according to claim 2, 3 or 4, characterized in that: The collision risk includes the speed thresholds of the upper car and the lower car respectively. The data processing module compares the speed data information of the upper car and the lower car with the preset speed thresholds respectively, and determines that there is a collision risk when the speed of either car exceeds the preset speed threshold.

6. The double-car elevator auxiliary rescue system according to claim 5, characterized in that: It also includes an alarm module electrically connected to the data processing module, and the alarm module sends out corresponding sound and light alarms when the car speeds of the upper car and the lower car exceed a preset speed threshold, the car reaches a level position, or the real-time distance is less than a predetermined safety distance or less than a minimum safety distance.

7. The double-car elevator auxiliary rescue system according to claim 1, characterized in that: It also includes a display module electrically connected to the data processing module, and the display module displays the position data information, running direction data information and speed data information of the upper car and the lower car respectively in real time.

8. The double-car elevator auxiliary rescue system according to claim 7, characterized in that: The display module includes a display unit and a communication unit, and the communication unit communicates data with the data processing module through wired communication or wireless communication.

9. The double-car elevator auxiliary rescue system according to claim 1, characterized in that: The safety clamp is a bidirectional safety clamp.

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