Anti-shaking device for elevator rope

Abstract

The invention discloses an anti-shaking device for an elevator rope. The anti-shaking device comprises a first laser emitting mechanism, a laser receiving mechanism and a control device, the first laser emitting mechanism is formed by annularly arranging a plurality of laser generators, and the first laser emitting mechanism is fixedly arranged at the top of a lift car, so that the laser generators of the first laser emitting mechanism surround the periphery of an elevator rope within a first preset range; the laser receiving mechanism is fixedly arranged at the position, corresponding to the first laser emitting mechanism, of the top of the hoistway, so that the laser receiving mechanism can receive laser beams emitted by all the laser generators. The control device is connected with an elevator control system, and in the elevator running process, when laser beams emitted by the first laser emitting mechanism are interfered, the control device sends an instruction of running at a first speed to the elevator control system; the first speed is smaller than the rated speed of the elevator. Different shaking amplitudes of the elevator rope can be monitored in real time, and a speed reduction control strategy is adopted.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, and in particular to an elevator rope anti-sway device. Background Art

[0002] When there is strong wind, the super high-rise building will shake greatly. Under the action of the building shaking, the flexible parts of the elevator (traction wire rope, compensation wire rope, speed limiter wire rope, accompanying cable) will also shake greatly. When the elevator is running under such circumstances, there is a risk of hooking or entanglement of the flexible parts.

[0003] At present, there are two main technologies for preventing the traction wire rope from swaying: active control and passive control. Active control generally uses detection methods to obtain the swaying of the traction wire rope. When the swaying amplitude exceeds the set threshold, the elevator is slowed down or stopped. Passive control anti-swaying technology mostly uses limit devices to limit the swaying amplitude of the traction wire rope, while trying to prevent the limit device from invading the operating space of the car or counterweight.

[0004] Chinese patent document CN110002319B discloses a technical solution, which is a device for limiting the swing of the main rope. The rope swing limiter can move vertically in the hoistway, and the rope swing limiter is connected to the elevator counterweight through a fixed pulley, so that the rope swing limiter moves vertically in the hoistway corresponding to the movement of the counterweight, wherein the rope swing limiter includes a pair of movable pulleys, so that the ratio of the travel distance of the rope swing limiter to the travel distance of the counterweight is 1:2, and the limiting device always limits the main rope at the 1 / 2 position between the car and the top floor. It has the following problems: 1) The passive control method is used to limit the wire rope, which can only effectively act on a single position. 2) A new flexible component is introduced while limiting the swing of the flexible component.

[0005] Chinese patent document CN108726323A discloses a technical solution for actively controlling the elevator speed by means of detection. It includes multiple TOF cameras, each of which is set at different heights in the shaft, and monitors the swing amplitude of the speed limiter wire rope by capturing the image of the speed limiter rope. It also includes a swing detector connected to the TOF camera, which is used to detect the rope swing of the speed limiter rope and transmit an abnormal situation detection signal to the elevator controller to achieve control of the elevator speed. It has the following problems: 1) The detection device is arranged in the horizontal direction, which requires a large number and is costly. 2) The detection device can only be set at different heights, and the shaking state of all operating positions cannot be obtained. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a technical solution that can monitor the different swing amplitudes of the elevator rope in real time and adopt different control strategies of speed reduction or stopping operation.

[0007] In order to solve the above technical problems, the present invention provides an elevator rope anti-sway device, comprising a first laser emitting mechanism, a laser receiving mechanism and a control device; the first laser emitting mechanism is composed of a plurality of laser generators arranged in a ring shape, and the first laser emitting mechanism is fixedly arranged on the top of the car, so that the laser generator of the first laser emitting mechanism surrounds the outer periphery of the elevator rope within a first preset range; the laser receiving mechanism is fixedly arranged at a position corresponding to the first laser emitting mechanism on the top of the hoistway, so that the laser receiving mechanism can receive the laser beams emitted by all the laser generators;

[0008] The control device is connected to the elevator control system. During the operation of the elevator, when the laser beam emitted by the first laser emitting mechanism is interfered, the control device sends an instruction to the elevator control system to run at a first speed; the first speed is less than the rated speed of the elevator.

[0009] Preferably, during the operation of the elevator, when the amount of interference to the laser beam emitted by the first laser emitting mechanism exceeds a first threshold, the control device sends an instruction to the elevator control system to operate at a second speed; the second speed is less than the first speed.

[0010] Preferably, during the operation of the elevator, when the amount of interference to the laser beam emitted by the first laser emitting mechanism exceeds a second threshold, the control device sends a command to stop the operation to the elevator control system.

[0011] Preferably, the elevator rope anti-sway device also includes a second laser emitting mechanism; the second laser emitting mechanism is composed of a plurality of laser generators arranged in a ring shape, and the second laser emitting mechanism is fixedly arranged on the top of the car, so that the laser generator of the second laser emitting mechanism surrounds the periphery of the first laser emitting mechanism within a second preset range; during the operation of the elevator, when the laser beam emitted by the second laser emitting mechanism is interfered, the control device sends a command to stop the operation to the elevator control system.

[0012] Compared with the prior art, the present invention can monitor the different swing amplitudes of the elevator rope in real time, adopt different control strategies for speed reduction or stopping operation, and does not introduce new flexible components to increase the risk of swing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0014] Figure 1 Schematic diagram of an elevator rope anti-sway device according to Embodiment 1;

[0015] Figure 2 Schematic diagram of the laser emitting mechanism of Example 1;

[0016] Figure 3 This is a schematic diagram of the installation position of the laser receiving mechanism of Example 2. DETAILED DESCRIPTION

[0017] 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.

[0018] Example 1

[0019] like Figure 1 The exemplary elevator system shown includes a machine room floor 101, elevator ropes 102, guide rails 103, and a car 104. The elevator rope anti-sway device provided in this embodiment includes a laser emitting mechanism 110, a laser receiving mechanism 120, and a control device (not shown in the figure).

[0020] like Figure 2 As shown, specifically, the laser emitting mechanism 110 may include only the first laser emitting mechanism 111 ; preferably, it may include the first laser emitting mechanism 111 and the second laser emitting mechanism 112 .

[0021] The first laser emitting mechanism 111 and the second laser emitting mechanism 112 are composed of a plurality of laser generators 113 arranged in a ring shape.

[0022] The first laser emitting mechanism 111 is fixedly arranged on the top of the car, so that the laser generator 113 of the first laser emitting mechanism surrounds the periphery of the elevator rope within a first preset range; the second laser emitting mechanism 112 is fixedly arranged on the top of the car, so that the laser generator 113 of the second laser emitting mechanism surrounds the periphery of the first laser emitting mechanism 111 within a second preset range;

[0023] like Figure 3As shown, the laser receiving mechanism 120 is fixedly arranged at a position corresponding to the first laser emitting mechanism 111 at the top of the shaft, so that the laser receiving mechanism 120 can receive the laser beams emitted by all the laser generators 113;

[0024] The control device is connected to the elevator control system, and the principle of controlling the elevator operation is as follows:

[0025] During the operation of the elevator, when the laser beam emitted by the first laser emitting mechanism is interfered (i.e. the laser beam is blocked by the shaking of the rope), the control device sends an instruction to the elevator control system to run at a first speed V1; the first speed V1 is less than the rated speed of the elevator. The shaking of the rope is reduced by reducing the speed. If the shaking is reduced so that the laser beam is not interfered, the control device sends an instruction to the elevator control system to resume the rated speed operation.

[0026] If the rope shakes further, when the number of interferences of the laser beam emitted by the first laser emitting mechanism exceeds the first threshold, the control device sends a command to the elevator control system to run at a second speed V2 which is less than the first speed V1, that is, the elevator is controlled to further slow down.

[0027] If the rope shaking increases further, when the laser beam emitted by the second laser emitting mechanism is interfered, the control device sends a command to the elevator control system to stop the operation. When the rope shaking decreases to the point where the laser beam emitted by the second laser emitting mechanism is not interfered, the elevator operation is resumed, and the operating speed is controlled according to the degree of interference of the laser beam.

[0028] In addition, when the laser emitting mechanism only includes the first laser emitting mechanism, when the amount of interference of the laser beam emitted by the first laser emitting mechanism exceeds the second threshold, the control device sends a command to the elevator control system to stop the operation. When the rope shaking is reduced to the point where the amount of interference of the laser beam emitted by the first laser emitting mechanism does not exceed the second threshold, the elevator operation is resumed, and the operation speed is controlled according to the degree of interference of the laser beam.

[0029] 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 rope anti-sway device, characterized in that: It comprises a first laser emitting mechanism, a laser receiving mechanism and a control device; the first laser emitting mechanism is composed of a plurality of laser generators arranged in a ring shape, the first laser emitting mechanism is fixedly arranged on the top of the car, so that the laser generator of the first laser emitting mechanism surrounds the outer periphery of the elevator rope within a first preset range; the laser receiving mechanism is fixedly arranged at a position corresponding to the first laser emitting mechanism on the top of the hoistway, so that the laser receiving mechanism can receive the laser beams emitted by all the laser generators; The control device is connected to the elevator control system. During the operation of the elevator, when the laser beam emitted by the first laser emitting mechanism is interfered, the control device sends an instruction to the elevator control system to run at a first speed; the first speed is less than the rated speed of the elevator.

2. The elevator rope anti-sway device according to claim 1, characterized in that: During the operation of the elevator, when the amount of interference to the laser beam emitted by the first laser emitting mechanism exceeds a first threshold, the control device sends an instruction to the elevator control system to operate at a second speed; the second speed is less than the first speed.

3. The elevator rope anti-sway device according to claim 1, characterized in that: During the operation of the elevator, when the number of interferences to the laser beam emitted by the first laser emitting mechanism exceeds a second threshold, the control device sends a command to stop the operation to the elevator control system.

4. The elevator rope anti-sway device according to claim 2, characterized in that: The elevator rope anti-sway device also includes a second laser emitting mechanism; the second laser emitting mechanism is composed of a plurality of laser generators arranged in a ring shape, and the second laser emitting mechanism is fixedly arranged on the top of the car, so that the laser generator of the second laser emitting mechanism surrounds the periphery of the first laser emitting mechanism within a second preset range; During the operation of the elevator, when the laser beam emitted by the second laser emitting mechanism is interfered, the control device sends a command to stop the operation to the elevator control system.

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