Elevator safety system

Abstract

The utility model discloses an elevator safety system which comprises an evaluation unit, a lift car safety information sensor, a control cabinet, a lift car safety device, a hoistway 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 utility model relates to elevator control technology, especially in a kind of elevator safety system based on bus. BACKGROUND

[0002] Chinese patent document CN110316628B discloses an elevator safety system, an evaluation unit is connected with a car absolute position sensor through a first serial bus, connected with a car safety node through a second serial bus, and directly connected with a shaft safety device through a wire 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 with the car safety device through the wire harness, receives the state information of the car safety device and transmits to the evaluation unit;The evaluation unit outputs the signal whether the speed is safe according to the car speed value, outputs the signal whether overspeed according to the car speed value and the real-time position of the car, and outputs the signal whether the car is accidentally moved under the condition of opening door according to the state information of the car safety device, the state information of the shaft safety device, the car speed value and the real-time position of the car.

[0003] The above technical scheme 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, and the safety system has relatively high cost, and has two serial buses, and communication is susceptible to interference. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem to provide a kind of elevator safety system with simple topology structure and low cost, to realize the safety function of uplink overspeed protection, the safety function of monitoring normal deceleration protection, the safety function of executing car accidental movement protection.

[0005] To solve the above technical problem, the utility model provides a kind of elevator safety system, including evaluation unit, car safety information sensor, control cabinet, car safety device, shaft safety device and first serial bus;

[0006] The evaluation unit is connected with the car safety information sensor through the first serial bus;

[0007] The evaluation unit is connected with the shaft safety device through the wire harness, and the state information of the shaft safety device is detected;The shaft safety device at least includes floor door closure switch;

[0008] The car safety information sensor is connected with the car safety device through the wire harness, and the state information of the car safety device is detected;The car safety device at least includes car door closure switch;

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

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

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

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

[0013] The evaluation unit outputs a signal of whether the car moves accidentally under the door opening condition to the control cabinet according to the state information of the car safety device, state information of the shaft safety device, car speed value, real-time position of the car and preset shaft parameters of the elevator.

[0014] Preferably, the elevator safety system comprises a machine room safety device; the evaluation unit detects state information of the machine room safety device through a wire harness; and the machine room safety device comprises a machine room emergency stop switch or an emergency electric control box.

[0015] Preferably, the elevator safety system comprises a machine room safety device; the control cabinet detects state information of the machine room safety device through a wire harness; and the machine room safety device comprises a machine room emergency stop switch or an emergency electric control box.

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

[0017] Preferably, the car safety device further comprises one or more of the following devices: an escape door closing switch, a car roof emergency stop switch, a safety window closing switch, a safety gear action switch or a car roof maintenance control box.

[0018] Preferably, the shaft safety device further comprises 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 of whether the corresponding safety device acts to the control cabinet according to state information of the car safety device, state information of the shaft safety device and state information of the machine room safety device.

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

[0021] The utility model also provides an elevator safety system, including car safety information sensor, control cabinet, car safety device, shaft safety device and first serial bus;

[0022] The control cabinet connects the car safety information sensor through the first serial bus;

[0023] The control cabinet connects the shaft safety device through the wire harness, and detects state information of the shaft safety device;The shaft safety device at least includes a landing door closure switch;

[0024] The car safety information sensor connects the car safety device through the wire harness, and detects state information of the car safety device;The car safety device at least includes a car door closure switch;

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

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

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

[0028] The control cabinet generates the signal whether the car overspeeds accidentally according to the car speed value and the real-time position of car and the preset elevator normal deceleration protection curve;

[0029] The control cabinet generates the signal whether the car moves accidentally under the door according to the state information of car safety device, the state information of shaft safety device, the car speed value and the real-time position of car and the preset elevator shaft parameter.

[0030] Preferably, the elevator safety system includes machine room safety device;The control cabinet connects the machine room safety device through the wire harness, and detects state 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 the signal whether the corresponding safety device acts according to the state information of car safety device, the state information of shaft safety device and the state information of machine room safety device.

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

[0033] The elevator safety system of the utility model, the evaluation unit obtains the real-time position and speed value of the car through the car safety information sensor directly through the first serial bus, is not affected by the steel wire rope stretching, shaking and the relative slip of the steel wire rope and the traction machine wheel groove, can accurately obtain the position and speed of the car; the evaluation unit obtains the real-time position and speed value of the car and obtains the car safety device state information directly through the serial bus, can obtain the real-time position and speed value of the car quickly and with low time delay, can obtain accurate evaluation results, realizes the uplink overspeed protection function, the monitoring protection safety function to normal deceleration, the execution car accidental movement protection safety function; the real-time position and speed value of the car and the car safety device state information 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 car safety device state information through the first serial bus, and the circuit is simple; the evaluation unit accurately obtains the layer door state of each door area position through the wiring harness, can accurately realize the car accidental movement protection, and the evaluation unit control logic is simple, the false triggering risk is low, the elevator reliability is high, and the passenger riding experience is good. BRIEF DESCRIPTION OF DRAWINGS

[0034] The utility model will be further explained in detail in combination with the drawings and specific embodiments:

[0035] Figure 1 It is the elevator safety system structure schematic drawing of example 1.

[0036] Figure 2 It is the elevator safety system structure schematic drawing of example 2.

[0037] Figure 3 It is the elevator safety system structure schematic drawing of example 3. DETAILED DESCRIPTION

[0038] The other advantages and technical effects of the utility model can be fully understood by the person skilled in the art from the disclosure of the specification, and the utility model can also be implemented or applied by different specific embodiments, and each detail in the specification can be applied based on different viewpoints, and various modifications or changes can be carried out without departing from the general design idea of the utility model. It should be noted that the following examples and features in the examples can be combined with each other without conflict. The following exemplary embodiments of the utility model can be implemented in various 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 utility model complete and complete, and to fully convey the technical solutions of these exemplary embodiments to the person skilled in the art.

[0039] Example 1

[0040] AsFigure 1 As shown, the elevator system comprises a drive master 31, a car 32, a counterweight 33 and an elevator safety system.

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

[0042] The evaluation unit 1 connects the car safety information sensor 4 through the 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 also connects the car safety device 12 through a wire harness and transmits the status information of the car safety device 12 to the evaluation unit 1, the car safety device 12 at least comprising a car door closed switch; the status information of the car door closed switch can reflect whether the car door is in a closed or open state.

[0045] The evaluation unit 1 connects the hoistway safety device 15 through a wire harness and can detect the status information of the hoistway safety device 15, the hoistway safety device 15 at least comprising a landing door closed switch; the status information of the landing door closed switch can reflect whether the landing door is in a closed or open state.

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

[0047] The evaluation unit 1 connects the machine room safety device 11 through a wire harness and detects the status information of the machine room safety device 11; the machine room safety device 11 comprises a machine room emergency stop switch or an emergency electric operation control box. The machine room safety device status information reflects the state of the machine room emergency stop switch or the emergency electric control box.

[0048] The evaluation unit 1 outputs a signal of whether the corresponding safety device is activated 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 through a second serial bus 8.

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

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

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

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

[0054] Preferably, the shaft safety device 15 can further 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 state information also reflects the state 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 to the control cabinet indicating whether the corresponding safety device is in action according to the car safety device state information, the shaft safety device state information, and the machine room safety device state information.

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

[0057] Preferably, the control cabinet sends elevator state to the evaluation unit for the evaluation unit to determine the safety of the elevator operation and to control the start or stop of the elevator accordingly.

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

[0059] The elevator safety system of embodiment 1, the evaluation unit 1 obtains the real-time position and speed values of the car through the first serial bus 5 directly through the car safety information sensor 4, which is not affected by the steel wire rope stretch, shaking and the relative slip of the steel wire rope and the traction machine wheel groove, and can accurately obtain the position and speed of the car; the evaluation unit 1 obtains the real-time position and speed values of the car and obtains the state information of the car safety device through the serial bus, which can quickly and low-latency obtain the real-time position and speed values of the car, can obtain accurate evaluation results, and can close or open the safety relay contact points inside the evaluation unit 1; the uplink overspeed protection function, the monitoring and protection safety function of normal deceleration, and the execution of the car accidental movement protection safety function are realized; the evaluation unit 1 obtains the real-time position and speed values of the car and the state information of the car safety device through the first serial bus 5, and the line is simple; the evaluation unit 1 accurately obtains the state of each landing door through the wire harness, and can accurately realize the car accidental movement protection, while the evaluation unit control logic is simple, the risk of false triggering is low, the reliability of the elevator is high, and the passenger riding experience is good.

[0060] The evaluation unit 1 is connected with the control cabinet 7 through the second serial bus 8, and the state of the safety evaluation unit and the state control information of other safety or non-safety related functions related to the car position and speed including the above three safety functions are informed to the control cabinet 7, so that the control cabinet 7 executes the corresponding program, enters the corresponding state or performs the corresponding operation, and can display the information on the external interface device, to ensure the safe and reliable operation of the elevator.

[0061] Embodiment 2

[0062] As shown in Figure 2 , based on the elevator safety system of embodiment 1, in order to simplify the evaluation unit 1, the machine room safety device 11 is connected to the control cabinet 7 through the wire harness, and the state information of the machine room safety device 11 is detected by the control cabinet 7, and the rest is the same as embodiment 1.

[0063] Embodiment 3

[0064] As shown in Figure 3 , the elevator safety system provided by the embodiment comprises a car safety information sensor 4, a control cabinet 7, a car safety device 12, a shaft safety device 15, a machine room safety device 11 and a first serial bus 5.

[0065] The control cabinet 7 connects the car safety information sensor 4 through the first serial bus 5.

[0066] The control cabinet 7 connects the shaft safety device 15 through the wire harness and detects the state information of the shaft safety device; the shaft safety device 15 at least comprises a landing door closing switch.

[0067] The car safety information sensor 4 connects the car safety device 12 through a wire harness and detects state information of the car safety device; the car safety device 12 at least includes a car door closed switch;

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

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

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

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

[0072] The control cabinet 7 generates a signal of whether the car moves accidentally under the door according to the state information of the car safety device, state information of the shaft safety device, car speed value, real-time position of the car and preset shaft parameters of the elevator.

[0073] The control cabinet 7 connects the machine room safety device 11 through a wire harness and detects state 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 embodiment is different from the embodiments 1 and 2 in 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 whole control cabinet needs to be safety certified. In the embodiments 1 and 2, the evaluation unit needs to be safety certified, and the control cabinet does not need to be safety certified.

[0075] Some preferred technical features in the embodiment are the same as those in the 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 real-time position value of the car to obtain the real-time speed value of the car.

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

[0079] Preferably, the car safety device 12 further comprises one or more of the following devices: an escape door closed switch, a roof emergency stop switch, a safety window closed switch, a safety gear action switch or a roof maintenance control box.

[0080] Preferably, the shaft safety device 15 further comprises one or more of the following devices: a safety door closed 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 utility model is described in detail through the specific implementation and examples above, but these do not constitute the limitation to the utility model. In the case where the principle of the utility model is not departed from, many deformations and improvements can be made by the person skilled in the art, and these should be regarded as the protection scope of the utility model.

Claims

1. An elevator safety system characterized by, The elevator safety system comprises an evaluation unit, a car safety information sensor, a control cabinet, car safety devices, shaft safety devices and a first serial bus; The evaluation unit connects the car safety information sensor through the first serial bus; The evaluation unit connects the shaft safety devices through a wire harness and detects state information of the shaft safety devices; The shaft safety devices at least comprise a landing door closed switch; The car safety information sensor connects the car safety devices through a wire harness and detects state information of the car safety devices; the car safety devices at least comprise a car door closed switch; The car safety information sensor has a car absolute position detection device which detects real-time position and speed value of the car; The car safety information sensor sends the real-time position, speed value of the car and state information of the car safety devices to the evaluation unit; The evaluation unit outputs a signal of whether the car speed is safe to the control cabinet according to whether the car speed value exceeds a set speed; The evaluation unit outputs a signal of whether the car is overspeeding to the control cabinet according to the car speed value, real-time position of the car and a preset normal deceleration protection curve of the elevator shaft; The evaluation unit outputs a signal of whether the car is moving unexpectedly with the door open to the control cabinet according to the state information of the car safety devices, state information of the shaft safety devices, car speed value, real-time position of the car and a preset elevator shaft parameter.

2. The elevator safety system of claim 1, wherein, The elevator safety system comprises machine room safety devices; the evaluation unit connects the machine room safety devices through a wire harness and detects state information of the machine room safety devices; the machine room safety devices comprise a machine room emergency stop switch or an emergency electric control box.

3. The elevator safety system of claim 1, wherein, The elevator safety system comprises machine room safety devices; the control cabinet connects the machine room safety devices through a wire harness and detects state information of the machine room safety devices; the machine room safety devices comprise a machine room emergency stop switch or an emergency electric control box.

4. The elevator safety system of claim 1, wherein, The evaluation unit connects the control cabinet through a second serial bus.

5. The elevator safety system of claim 1, wherein, The car safety devices further comprise one or more of the following devices: an escape door closed switch, a car roof emergency stop switch, a safety window closed switch, a safety gear action switch or a car roof maintenance control box.

6. The elevator safety system of claim 1, wherein, The shaft safety devices further comprise one or more of the following devices: a safety door closed switch, a buffer action switch, a pit emergency stop switch or a pit maintenance control box.

7. The elevator safety system of claim 2, wherein, The evaluation unit outputs a signal of whether the corresponding safety device is in action to the control cabinet according to the state information of the car safety devices, state information of the shaft safety devices and state information of the machine room safety devices.

8. The elevator safety system of claim 1, wherein, The evaluation unit sends an instruction 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 by The elevator safety system comprises a car safety information sensor, a control cabinet, car safety devices, shaft safety devices and a first serial bus; The control cabinet connects the car safety information sensor through the first serial bus; The control cabinet connects the shaft safety devices through a wire harness and detects state information of the shaft safety devices; The shaft safety devices at least comprise a landing door closed switch; The car safety information sensor connects the car safety devices through a wire harness and detects state information of the car safety devices; the car safety devices at least comprise a car door closed switch; The car safety information sensor connects the car safety device through a wire harness and detects state 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 which detects real-time position and speed value of the car; The car safety information sensor sends the real-time position, speed value of the car and state information of the car safety device to the control cabinet; The control cabinet generates a signal of whether the car speed is safe according to whether the car speed value exceeds a set speed; The control cabinet generates a signal of whether the car overspeeds accidentally according to the car speed value, real-time position of the car and a preset elevator normal deceleration protection curve; The control cabinet generates a signal of whether the car moves accidentally under the door condition according to the state information of the car safety device, state information of the shaft safety device, car speed value, real-time position of the car and a preset elevator shaft parameter.

10. The elevator safety system of claim 9, wherein, The elevator safety system includes a machine room safety device; the control cabinet connects the machine room safety device through a wire harness and detects state 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 of claim 10, wherein, The control cabinet generates a signal of whether the corresponding safety device acts according to the state information of the car safety device, state information of the shaft safety device and state information of the machine room safety device.

12. The elevator safety system of claim 9, wherein, The control cabinet sends an instruction to the car safety information sensor to control the car safety information sensor to start, stop, restart or self-check.

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