A detection system for a speed limiter safety clutch

Abstract

The application discloses a kind of detection system and method for governor-safety gear, system includes encoder feedback sensor, flat layer inductive sensor, alarm sending device and trigger execution sensor, the elevator passage is provided with flat layer inductive sensor, and the drive host is provided with encoder.Method includes the following steps: S1, elevator is lifted to the highest point;S2, release governor-safety gear, so that governor-safety gear is in running state;S3, within a specified time, drive host drives elevator to descend at maintenance speed, governor-safety gear starts to limit elevator movement;S4, when encoder feedback sensor receives signal and flat layer inductive sensor does not receive signal, it indicates that governor-safety gear is in normal state, otherwise, it indicates that governor-safety gear is in abnormal state.S5, drive host drives elevator to run up and down at least once at normal speed, and it indicates that elevator operation is in normal state if running normally, and detection is ended.

Description

Technical Field

[0001] This invention relates to the field of elevator maintenance technology, specifically a detection system for speed governor-safety gear. Background Technology

[0002] With over 8 million elevators in China, elevators have become an essential mode of transportation for people going up and down stairs. The speed governor-safety clamp system is an extremely important component of the elevator safety system. When other safety systems fail, this system can pull up the safety clamp to lock the car onto the guide rails in an emergency, preventing the elevator from falling and causing injury or death.

[0003] However, in reality, the failure of the speed governor-safety gear system often occurs, leading to elevator falls and causing significant casualties and property damage. The main reasons for the failure of the speed governor-safety gear system are: (1) insufficient friction between the speed governor wire rope and the speed governor, resulting in the safety gear being unable to pull; (2) the rotating part of the speed governor pawl becoming rusted and stuck due to prolonged inactivity, preventing it from falling into the slot; (3) excessive gap in the safety gear, resulting in the inability to stop the car after pulling. Regardless of the cause of the failure of the speed governor-safety gear linkage test, we should have an intelligent testing system to detect it in advance and take measures to prevent the elevator from being put into operation before the repair is completed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and propose a detection system for speed limiter-safety clamps to solve the above-mentioned problems.

[0005] The objective of this invention is achieved through the following technical solution: a detection system for a speed governor-safety gear, comprising an encoder feedback sensor, a leveling sensor, an alarm issuing device, and a triggering sensor installed on an elevator, a leveling sensor installed in the elevator shaft, and an encoder installed on the drive host for driving the elevator to open and close, wherein the encoder feedback sensor, leveling sensor, alarm issuing device, triggering sensor, leveling sensor, encoder, and speed governor are all signal connected.

[0006] The speed limiter is equipped with a ratchet that is linked to an electrical switch, a pawl that matches the ratchet, a connecting rod, and an electromagnet. The electromagnet is connected to the pawl via the connecting rod, and the electromagnet is electrically connected to a triggering device. The triggering device is connected to a triggering sensor signal.

[0007] The electrical switch is circular.

[0008] The elevator is equipped with a timing sensor that is connected to the encoder signal.

[0009] The elevator is equipped with an alarm issuing device that is connected to the leveling sensor signal.

[0010] A detection method for a speed limiter-safety clamp includes the following steps: S1. During the inspection period, raise the elevator to its highest point; S2. Release the speed limiter-safety gear to put the speed limiter-safety gear into the operating state; S3. The timing sensor starts timing, the drive unit drives the elevator to descend at the inspection speed for a specified time, and the speed limiter-safety gear is activated to restrict the elevator's movement. S4. When the encoder feedback sensor receives a signal but the leveling sensor does not receive a signal, it indicates that the speed limiter-safety brake is in normal condition; otherwise, it indicates that the speed limiter-safety brake is in abnormal condition.

[0011] S5. Drive the elevator to run up and down at normal speed at least once. If the operation is normal, it indicates that the elevator is in normal operation and the test ends.

[0012] The maintenance speed is 0.5 m / s.

[0013] The detection time is every day in the early morning.

[0014] The beneficial effects of this invention are: periodic automatic intelligent testing of the speed limiter-safety clamp linkage test; if a failure is found, the elevator operation is stopped and the repair unit is notified, thereby ensuring the safe use of the elevator. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an elevator. Figure 2 This is a schematic diagram of a speed limiter; In the diagram, 1-elevator, 2-encoder feedback sensor, 3-leveling sensor, 4-alarm issuing device, 5-triggering sensor, 6-speed limiter, 7-electrical switch, 8-ratchet, 9-pawl, 10-linkage, 11-electromagnet, 12-triggering device, 13-timing sensor. Detailed Implementation

[0016] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] It should be noted that the directional concepts of "left", "right", "up", "down", "front", "back", "inner", and "outer" in the following scheme are all relative directions, and will not be listed one by one here.

[0018] A detection system for speed limiter-safety brakes, reference Figure 1 and Figure 2 The system includes an encoder feedback sensor 2, a leveling sensor 3, a timing sensor 13, an alarm emitting device 4, and a triggering sensor 5, all installed on elevator 1. A leveling sensor connected to the leveling sensor 3 is installed on the elevator 1's vertical movement path. When the leveling sensor and leveling sensor 3 are on the same horizontal plane, leveling sensor 3 receives a leveling sensor signal. When elevator 1 descends from its highest point at a maintenance speed for 6 seconds, leveling sensor 3 and leveling sensor 3 are on the same horizontal plane. An encoder connected to the encoder feedback sensor 2 is installed on the drive unit that drives the elevator's vertical movement. When the drive unit starts running, the encoder sends a signal to the encoder feedback sensor 2. The triggering sensor 5, leveling sensor 3, encoder feedback sensor 2, timing sensor 13, and alarm emitting device 4 are all connected. The alarm emitting device 4 is an alarm telephone; upon receiving a designated signal, it automatically dials a manual maintenance hotline.

[0019] The electrical switch 7 on the speed limiter 6 has a circular end. The speed limiter 6 is equipped with a ratchet 8 that is linked to the electrical switch 7, a pawl 9 that matches the ratchet 8, an electromagnet 11, and a connecting rod 10. Both ends of the connecting rod 10 are connected to the pawl 9 and the electromagnet 11, respectively. The electromagnet 11 is electrically connected to a trigger actuator 12. The trigger actuator 12 is signal-connected to the trigger actuator sensor 5.

[0020] A detection method for speed limiter-safety calipers, based on the detection system for speed limiter-safety calipers in this embodiment, includes the following steps: S1. Elevator 1 is raised to its highest point at 1:00 AM every day. For those skilled in the art, this means that the detection needs to be started when there are the fewest people in the day. Therefore, in this embodiment, 1:00 AM is chosen every day. Those skilled in the art can choose according to the actual situation. S2. When elevator 1 is raised to the highest point, the triggering sensor 5 sends a signal to the triggering device 12, the triggering device 12 energizes the electromagnet 11, the connecting rod 10 moves, the pawl 9 leaves the ratchet 8, thereby releasing the speed governor 6-safety gear, and putting the speed governor 6-safety gear into the running state. S3, timing sensor 13 starts timing, drive host drives elevator 1 to descend at inspection speed for 6s, inspection speed is 0.5m / s, speed limiter (6) - safety clamp starts to restrict the movement of elevator 1; S4. When the encoder feedback sensor 2 receives a signal and the leveling sensor 3 does not receive a signal, it is determined that the wire rope is slipping on the drive host traction sheave, indicating that the test is successful, the speed limiter 6-safety clamp is in normal condition, the drive host drives the elevator to run upward at the inspection speed, and the pawl 9 is reset; otherwise, it indicates that the test has failed, and the alarm issuing device 4 sends out a manual maintenance call. S5. Drive the elevator 1 to run up and down at normal speed at least once. If the operation is normal, it means that the elevator 1 is in normal operation and the test ends.

[0021] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above description or related technical or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A detection system for a speed limiter-safety brake, characterized in that, The elevator (1) includes an encoder feedback sensor (2), a leveling sensor (3), and a trigger execution sensor (5) installed on the elevator (1). A leveling sensor is installed in the elevator channel. An encoder is installed on the drive host used to drive the elevator (1) to open and close. The encoder feedback sensor (2), leveling sensor (3), trigger execution sensor (5), leveling sensor, encoder, and speed limiter are all connected by signals. A timing sensor (13) connected to the encoder signal is installed on the elevator (1). The detection method includes the following steps: S1. During the detection period, lift elevator (1) to the highest point; S2. Release the speed limiter-safety gear to put the speed limiter-safety gear into the operating state; S3, the timing sensor (13) starts timing, the drive host drives the elevator (1) to descend at the inspection speed for a specified time, and the speed limiter-safety clamp starts to restrict the movement of the elevator (1); S4. When the encoder feedback sensor (2) receives a signal and the leveling sensor (3) does not receive a signal, it indicates that the speed limiter-safety brake is in normal condition; otherwise, it indicates that the speed limiter-safety brake is in abnormal condition. S5. Drive the elevator (1) to run up and down at normal speed at least once. If the operation is normal, it means that the elevator (1) is in normal operation and the test ends.

2. The detection system for a speed limiter-safety clamp according to claim 1, characterized in that: The speed limiter is equipped with a ratchet (8) that is linked to an electrical switch (7), a pawl (9) that matches the ratchet (8), a connecting rod (10) and an electromagnet (11). The electromagnet (11) is connected to the pawl (9) through the connecting rod (10). The electromagnet (11) is electrically connected to a triggering device (12). The triggering device (12) is connected to the triggering sensor (5) for signal transmission.

3. The detection system for a speed limiter-safety clamp according to claim 2, characterized in that: The end of the electrical switch (7) is round.

4. The detection system for a speed limiter-safety clamp according to claim 1, characterized in that: The elevator (1) is equipped with an alarm issuing device (4) that is connected to the leveling sensor (3).

5. A detection system for a speed limiter-safety clamp according to claim 1, characterized in that: The maintenance speed is 0.5 m / s.

6. The detection system for a speed limiter-safety clamp according to claim 1, characterized in that: The detection time is every day in the early morning.

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