Elevator safety system

Abstract

The invention discloses an elevator safety system which comprises an evaluation unit, a car safety information sensor, a control cabinet, a car safety device, a shaft safety device and a first serial bus. The evaluation unit is connected with a car safety information sensor through a first serial bus; the evaluation unit is connected with a hoistway safety device through a wire harness; the lift car safety information sensor is connected with the lift car safety device through a wire harness. The lift car safety information sensor is provided with a lift car absolute position detection device for detecting the real-time position and speed value of the lift car; the evaluation unit outputs a signal indicating whether the car speed is safe or not to the control cabinet according to whether the car speed value exceeds the set speed or not; according to the car speed value, the car real-time position and a preset elevator normal deceleration protection curve, a signal indicating whether the car is overspeed accidentally is output to a control cabinet; and according to the state information of the lift car safety device, the state information of the hoistway safety device, the lift car speed value, the real-time position of the lift car and preset elevator hoistway parameters, a signal indicating whether the lift car accidentally moves or not under the door opening condition is output to a control cabinet.

Description

Technical Field

[0001] The invention relates to elevator control technology, and in particular to an elevator safety system based on a bus. Background Art

[0002] Chinese patent document CN110316628B discloses an elevator safety system, in which an evaluation unit is connected to a car absolute position sensor via a first serial bus, connected to a car safety node via a second serial bus, and directly connected to a shaft safety device via a wiring harness; the car absolute position sensor sends the real-time position and speed value of the car to the evaluation unit; the car safety node is connected to the car safety device via a wiring harness, receives the car safety device status information and transmits it to the evaluation unit; the evaluation unit outputs a signal of whether the speed is safe according to the car speed value, outputs a signal of whether overspeeding according to the car speed value and the real-time position of the car, and outputs a signal of whether the car moves unexpectedly when the door is open according to the car safety device status information, the shaft safety device status information, the car speed value and the real-time position of the car.

[0003] The above technical solution has an absolute position sensor and a car safety node on the car, and transmits the real-time position, speed value and safety information of the car to the evaluation unit through the first serial bus and the second serial bus. This safety system has a relatively high cost and has two serial buses, and the communication is easily interfered. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an elevator safety system with a simple topology and low cost, so as to realize the upward overspeed protection safety function, the normal deceleration protection safety function and the unexpected movement protection safety function of the car.

[0005] To solve the above technical problems, the present invention provides an elevator safety system, comprising an evaluation unit, a car safety information sensor, a control cabinet, a car safety device, a hoistway safety device and a first serial bus;

[0006] The evaluation unit is connected to the car safety information sensor via a first serial bus;

[0007] The evaluation unit is connected to the shaft safety device through a wiring harness to detect the status information of the shaft safety device; the shaft safety device at least includes a landing door closing switch;

[0008] The car safety information sensor is connected to the car safety device through a wiring harness to detect the status information of the car safety device; the car safety device at least includes a car door closing switch;

[0009] The car safety information sensor has a car absolute position detection device, and the car absolute position detection device detects the real-time position and speed value of the car;

[0010] The car safety information sensor sends the real-time position and speed value of the car and the status information of the car safety device to the evaluation unit;

[0011] The evaluation unit outputs a signal to the control cabinet whether the car speed is safe according to whether the car speed value exceeds the set speed;

[0012] The evaluation unit outputs a signal to the control cabinet indicating whether the car is accidentally overspeeding according to the car speed value and the real-time position of the car and the preset normal deceleration protection curve of the elevator;

[0013] The evaluation unit outputs a signal to the control cabinet indicating whether the car moves unexpectedly when the door is open based on the status information of the car safety device, the status information of the shaft safety device, the car speed value and the real-time position of the car, and the preset elevator shaft parameters.

[0014] Preferably, the elevator safety system includes a machine room safety device; the evaluation unit is connected to the machine room safety device via a wiring harness to detect status information of the machine room safety device; the machine room safety device includes a machine room emergency stop switch or an emergency electric operation control box.

[0015] Preferably, the elevator safety system includes a machine room safety device; the control cabinet is connected to the machine room safety device via a wiring harness to detect status information of the machine room safety device; the machine room safety device includes a machine room emergency stop switch or an emergency electric control box.

[0016] Preferably, the evaluation unit is connected to the control cabinet via a second serial bus.

[0017] Preferably, the car safety device also includes one or more of the following devices: an escape door closing switch, a car top emergency stop switch, a safety window closing switch, a safety clamp action switch or a car top maintenance control box.

[0018] Preferably, the shaft safety device also includes one or more of the following devices: a safety door closing switch, a buffer action switch, a pit emergency stop switch or a pit maintenance control box.

[0019] Preferably, the evaluation unit outputs a signal indicating whether the corresponding safety device is in action to the control cabinet according to the car safety device status information, the hoistway safety device status information and the machine room safety device status information.

[0020] Preferably, the evaluation unit sends instructions to the car safety information sensor to control the car safety information sensor to start, stop, restart or self-check.

[0021] The present invention also provides an elevator safety system, comprising a car safety information sensor, a control cabinet, a car safety device, a hoistway safety device and a first serial bus;

[0022] The control cabinet is connected to the car safety information sensor via a first serial bus;

[0023] The control cabinet is connected to the shaft safety device through a wiring harness to detect the status information of the shaft safety device; the shaft safety device at least includes a landing door closing switch;

[0024] The car safety information sensor is connected to the car safety device through a wiring harness to detect the status information of the car safety device; the car safety device at least includes a car door closing switch;

[0025] The car safety information sensor has a car absolute position detection device, and the car absolute position detection device detects the real-time position and speed value of the car;

[0026] The car safety information sensor sends the real-time position, speed value and status information of the car safety device to the control cabinet;

[0027] The control cabinet generates a signal whether the car speed is safe according to whether the car speed value exceeds the set speed;

[0028] The control cabinet generates a signal indicating whether the car is accidentally overspeeding according to the car speed value and the real-time position of the car, as well as a preset normal deceleration protection curve of the elevator;

[0029] The control cabinet generates a signal indicating whether the car moves unexpectedly when the door is open based on the status information of the car safety device, the status information of the shaft safety device, the car speed value and the real-time position of the car, and the preset elevator shaft parameters.

[0030] Preferably, the elevator safety system includes a machine room safety device; the control cabinet is connected to the machine room safety device via a wiring harness to detect status information of the machine room safety device; the machine room safety device includes a machine room emergency stop switch or an emergency electric control box.

[0031] Preferably, the control cabinet generates a signal indicating whether the corresponding safety device is in action according to the car safety device status information, the hoistway safety device status information and the machine room safety device status information.

[0032] Preferably, the control cabinet sends instructions to the car safety information sensor to control the car safety information sensor to start, stop, restart or self-check.

[0033] In the elevator safety system of the present invention, the evaluation unit obtains the real-time position and speed value of the car directly through the car safety information sensor through the first serial bus, which is not affected by the stretching and shaking of the wire rope and the relative slip between the wire rope and the traction machine wheel groove, and can accurately obtain the position and speed of the car; the evaluation unit directly obtains the real-time position and speed value of the car and the status information of the car safety device through the serial bus, and can quickly obtain the real-time position and speed value of the car with low latency, and can obtain accurate evaluation results, so as to realize the upward overspeed protection function, the monitoring and protection safety function of normal deceleration, and the execution of the car accidental movement protection safety function; the real-time position and speed value of the car and the status information of the car safety device are transmitted to the evaluation unit through the first serial bus; the evaluation unit obtains the real-time position and speed value of the car and the status information of the car safety device through the first serial bus, and the circuit is simple; the evaluation unit accurately obtains the state of the floor door at each door zone position through the wiring harness, and can accurately realize the car accidental movement protection, and at the same time, the evaluation unit control logic is simple, the risk of false triggering is low, the elevator reliability is high, and the passenger riding experience is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0035] Figure 1 This is a schematic diagram of the structure of an elevator safety system according to Embodiment 1;

[0036] Figure 2 This is a schematic diagram of the structure of an elevator safety system according to Embodiment 2;

[0037] Figure 3 This is a schematic diagram of the structure of the elevator safety system of Example 3. DETAILED DESCRIPTION

[0038] The following describes the implementation methods of the present invention through specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation methods, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other in the absence of conflict. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art.

[0039] Example 1

[0040] like Figure 1As shown, the elevator system includes a drive main unit 31, a car 32, a counterweight 33 and an elevator safety system.

[0041] The elevator safety system of this embodiment includes an evaluation unit 1, a car safety information sensor 4, a control cabinet 7, a shaft safety device 15, a first serial bus 5, a car safety device 12, a shaft safety device 15 and a machine room safety device 11;

[0042] The evaluation unit 1 is connected to the car safety information sensor 4 via a first serial bus 5;

[0043] The car safety information sensor 4 has a car absolute position detection device 9, which detects the real-time position and speed value of the car and sends them to the evaluation unit 1;

[0044] The car safety information sensor 4 is also connected to the car safety device 12 through a wiring harness, and transmits the status information of the car safety device 12 to the evaluation unit 1. The car safety device 12 at least includes a car door closing switch; the status information of the car door closing switch can reflect whether the car door is in a closed or open state.

[0045] The evaluation unit 1 is connected to the shaft safety device 15 through a wiring harness and can detect the status information of the shaft safety device 15. The shaft safety device 15 at least includes a landing door closing switch; the status information of the landing door closing switch can reflect whether the landing door is closed or open.

[0046] The evaluation unit 1 outputs a signal to the control cabinet 7 indicating whether the speed is safe according to whether the car speed value exceeds the set speed; outputs a signal to the control cabinet 7 indicating whether there is an accidental overspeed according to the car speed value and the real-time position of the car, and the preset normal deceleration protection curve of the elevator; outputs a signal to the control cabinet 7 indicating whether the car moves unexpectedly when the door is open according to the status information of the car safety device 12, the status information of the hoistway safety device 15, the car speed value and the real-time position of the car, and the preset hoistway parameters of the elevator; and closes or opens the safety relay contacts inside the evaluation unit 1.

[0047] The evaluation unit 1 is connected to the machine room safety device 11 through a wiring harness to detect the status information of the machine room safety device 11; the machine room safety device 11 includes a machine room emergency stop switch or an emergency electric operation control box. The machine room safety device status information reflects the status of the machine room emergency stop switch or the emergency electric control box.

[0048] The evaluation unit 1 outputs a signal indicating whether the corresponding safety device is in action to the control cabinet according to the car safety device status information, the hoistway safety device status information and the machine room safety device status information.

[0049] Preferably, the evaluation unit 1 is connected to the control cabinet 7 via a second serial bus 8 .

[0050] Preferably, if the car safety information sensor 4 does not send the car speed value, the evaluation unit 1 differentiates the car real-time position value to obtain the car real-time speed value.

[0051] Preferably, the set speed is set according to the rated speed value of the elevator and an additional margin.

[0052] Preferably, the elevator shaft parameters include the elevator shaft height, the height of each floor, the door opening range, the re-leveling range and the like.

[0053] Preferably, the car safety device 12 includes a car door locking switch, a car door in-position contact, and may also include one or more of the following devices: an escape door closing switch, a car top emergency stop switch, a safety window closing switch, a safety clamp action switch, or a car top maintenance control box. The car safety device status information also reflects the status of the escape door, the car top emergency stop switch, the safety window, or the safety clamp.

[0054] Preferably, the shaft safety device 15 may also include one or more of the following devices: a safety door closing switch, a buffer action switch, a pit emergency stop switch or a pit maintenance control box. The shaft safety device status information also reflects the status of the safety door, the buffer, the pit emergency stop switch and the pit maintenance control box.

[0055] Preferably, the evaluation unit outputs a signal indicating whether the corresponding safety device is in action to the control cabinet according to the car safety device status information, the hoistway safety device status information and the machine room safety device status information.

[0056] Preferably, the control cabinet sends the elevator shaft information to the evaluation unit; the evaluation unit compares the elevator shaft information with elevator shaft parameters preset in the evaluation unit to determine the reliability of the evaluation unit itself.

[0057] Preferably, the control cabinet sends the elevator status to the evaluation unit, so that the evaluation unit can judge the safety of the elevator operation and control the elevator to start or stop accordingly.

[0058] Preferably, the evaluation unit sends instructions to the car safety information sensor to control the car safety information sensor to start, stop, restart or self-check.

[0059] In the elevator safety system of Example 1, the evaluation unit 1 obtains the real-time position and speed value of the car directly through the car safety information sensor 4 through the first serial bus 5, is not affected by the stretching and shaking of the wire rope and the relative slip between the wire rope and the traction machine wheel groove, and can accurately obtain the position and speed of the car; the evaluation unit 1 directly obtains the real-time position and speed value of the car and the status information of the car safety device through the serial bus, can quickly obtain the real-time position and speed value of the car with low latency, can obtain accurate evaluation results, and close or disconnect the safety relay contacts inside the evaluation unit 1; realizes the upward overspeed protection function, the monitoring protection safety function of normal deceleration, and the execution of the car accidental movement protection safety function; the evaluation unit 1 obtains the real-time position and speed value of the car and the status information of the car safety device through the first serial bus 5, and the circuit is simple; the evaluation unit 1 accurately obtains the state of the floor door at each door area position through the wiring harness, and can accurately implement the car accidental movement protection. At the same time, the evaluation unit control logic is simple, the risk of false triggering is low, the elevator reliability is high, and the passenger riding experience is good.

[0060] The evaluation unit 1 is connected to the control cabinet 7 via the second serial bus 8, and informs the control cabinet 7 of other safety-related or non-safety-related functional status control information related to the car position and speed, including the above-mentioned three safety functions, and the status of the safety evaluation unit, so that it can execute the corresponding program, enter the corresponding state or perform the corresponding operation, and can display the information on the external interface device to ensure the safe and reliable operation of the elevator.

[0061] Example 2

[0062] like Figure 2 As shown, based on the elevator safety system of Example 1, in order to simplify the evaluation unit 1, the machine room safety component 11 is connected to the control cabinet 7 through a wiring harness, and the status information of the machine room safety component 11 is detected by the control cabinet 7. The rest of the parts are the same as Example 1.

[0063] Example 3

[0064] like Figure 3 As shown, the elevator safety system provided in this embodiment includes a car safety information sensor 4, a control cabinet 7, a car safety device 12, a hoistway safety device 15, a machine room safety device 11 and a first serial bus 5;

[0065] The control cabinet 7 is connected to the car safety information sensor 4 via the first serial bus 5;

[0066] The control cabinet 7 is connected to the shaft safety device 15 through a wiring harness to detect the status information of the shaft safety device; the shaft safety device 15 at least includes a landing door closing switch;

[0067] The car safety information sensor 4 is connected to the car safety device 12 through a wiring harness to detect the status information of the car safety device; the car safety device 12 at least includes a car door closing switch;

[0068] The car safety information sensor 4 has a car absolute position detection device 9, and the car absolute position detection device 9 detects the real-time position and speed value of the car;

[0069] The car safety information sensor 4 sends the real-time position, speed value and status information of the car safety device to the control cabinet 7;

[0070] The control cabinet 7 generates a signal whether the car speed is safe according to whether the car speed value exceeds the set speed;

[0071] The control cabinet 7 generates a signal indicating whether the car is accidentally overspeeding according to the car speed value and the real-time position of the car, as well as a preset normal deceleration protection curve of the elevator;

[0072] The control cabinet 7 generates a signal indicating whether the car moves unexpectedly when the door is open, based on the status information of the car safety device, the status information of the shaft safety device, the car speed value and the real-time position of the car, and the preset elevator shaft parameters.

[0073] The control cabinet 7 is connected to the machine room safety device 11 through a wiring harness to detect the status information of the machine room safety device 11; the machine room safety device 11 includes a machine room emergency stop switch or an emergency electric control box.

[0074] The difference between this embodiment and embodiments 1 and 2 is that the execution function of the evaluation unit is integrated into the control cabinet 7, which has the advantage of higher integration, but the disadvantage is that the entire control cabinet needs to undergo safety certification. In embodiments 1 and 2, the evaluation unit needs to undergo safety certification, but the control cabinet does not need to undergo safety certification.

[0075] Some preferred technical features in this embodiment are the same as those in Embodiment 1, for example:

[0076] Preferably, the set speed is set according to the rated speed value of the elevator and an additional margin.

[0077] Preferably, if the car safety information sensor 4 does not send the car speed value, the control cabinet 7 differentiates the car real-time position value to obtain the car real-time speed value.

[0078] Preferably, the elevator shaft parameters include the elevator shaft height, the height of each floor, the door opening range and the re-leveling range.

[0079] Preferably, the car safety device 12 also includes one or more of the following devices: an escape door closing switch, a car top emergency stop switch, a safety window closing switch, a safety clamp action switch or a car top maintenance control box.

[0080] Preferably, the shaft safety device 15 also includes one or more of the following devices: a safety door closing switch, a buffer action switch, a pit emergency stop switch or a pit maintenance control box.

[0081] Preferably, the control cabinet sends instructions to the car safety information sensor to control the car safety information sensor to start, stop, restart or self-check.

[0082] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An elevator safety system, characterized in that: It includes an evaluation unit, a car safety information sensor, a control cabinet, a car safety device, a shaft safety device and a first serial bus; The evaluation unit is connected to the car safety information sensor via a first serial bus; The evaluation unit is connected to the shaft safety device via a wiring harness to detect status information of the shaft safety device; The hoistway safety device at least includes a landing door closing switch; The car safety information sensor is connected to the car safety device through a wiring harness to detect the status information of the car safety device; the car safety device at least includes a car door closing switch; The car safety information sensor has a car absolute position detection device, and the car absolute position detection device detects the real-time position and speed value of the car; The car safety information sensor sends the real-time position and speed value of the car and the status information of the car safety device to the evaluation unit; The evaluation unit outputs a signal to the control cabinet whether the car speed is safe according to whether the car speed value exceeds the set speed; The evaluation unit outputs a signal to the control cabinet indicating whether the car is accidentally overspeeding according to the car speed value and the real-time position of the car and the preset normal deceleration protection curve of the elevator; The evaluation unit outputs a signal to the control cabinet indicating whether the car moves unexpectedly when the door is open based on the status information of the car safety device, the status information of the shaft safety device, the car speed value and the real-time position of the car, and the preset elevator shaft parameters.

2. The elevator safety system according to claim 1, characterized in that: The elevator safety system includes a machine room safety device; the evaluation unit is connected to the machine room safety device via a wiring harness to detect status information of the machine room safety device; the machine room safety device includes a machine room emergency stop switch or an emergency electric operation control box.

3. The elevator safety system according to claim 1, characterized in that: The elevator safety system includes a machine room safety device; the control cabinet is connected to the machine room safety device through a wiring harness to detect status information of the machine room safety device; the machine room safety device includes a machine room emergency stop switch or an emergency electric control box.

4. The elevator safety system according to claim 1, characterized in that: The evaluation unit is connected to the control cabinet via a second serial bus.

5. The elevator safety system according to claim 1, characterized in that: The car safety device also includes one or more of the following devices: an escape door closing switch, a car top emergency stop switch, a safety window closing switch, a safety clamp action switch or a car top maintenance control box.

6. The elevator safety system according to claim 1, characterized in that: The shaft safety device also includes one or more of the following devices: a safety door closing switch, a buffer action switch, a pit emergency stop switch or a pit maintenance control box.

7. The elevator safety system according to claim 2, characterized in that: The evaluation unit outputs a signal indicating whether the corresponding safety device is in action to the control cabinet according to the car safety device status information, the hoistway safety device status information and the machine room safety device status information.

8. The elevator safety system according to claim 1, characterized in that: The evaluation unit sends instructions to the car safety information sensor to control the car safety information sensor to start, stop, restart or self-check.

9. An elevator safety system, characterized in that: It includes a car safety information sensor, a control cabinet, a car safety device, a shaft safety device and a first serial bus; The control cabinet is connected to the car safety information sensor via a first serial bus; The control cabinet is connected to the shaft safety device via a wiring harness to detect status information of the shaft safety device; The hoistway safety device at least includes a landing door closing switch; The car safety information sensor is connected to the car safety device through a wiring harness to detect the status information of the car safety device; the car safety device at least includes a car door closing switch; The car safety information sensor has a car absolute position detection device, and the car absolute position detection device detects the real-time position and speed value of the car; The car safety information sensor sends the real-time position, speed value and status information of the car safety device to the control cabinet; The control cabinet generates a signal whether the car speed is safe according to whether the car speed value exceeds the set speed; The control cabinet generates a signal indicating whether the car is accidentally overspeeding according to the car speed value and the real-time position of the car, as well as a preset normal deceleration protection curve of the elevator; The control cabinet generates a signal indicating whether the car moves unexpectedly when the door is open based on the status information of the car safety device, the status information of the shaft safety device, the car speed value and the real-time position of the car, and the preset elevator shaft parameters.

10. The elevator safety system according to claim 9, characterized in that: The elevator safety system includes a machine room safety device; the control cabinet is connected to the machine room safety device through a wiring harness to detect status information of the machine room safety device; the machine room safety device includes a machine room emergency stop switch or an emergency electric control box.

11. The elevator safety system according to claim 10, characterized in that: The control cabinet generates a signal indicating whether the corresponding safety device is in action according to the car safety device status information, the hoistway safety device status information and the machine room safety device status information.

12. The elevator safety system according to claim 9, characterized in that: The control cabinet sends instructions to the car safety information sensor to control the car safety information sensor to start, stop, restart or self-check.

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