Diversion sheave state detection device and control method

Abstract

The invention discloses a diversion sheave state detection device, comprising: a diversion sheave assembly comprising a steel wire rope, a sheave shaft and a clamping plate; the detection assembly comprises a detection plate and a detection plate fixing piece, and when the steel wire rope, the rope wheel shaft or the clamping plate in the diversion sheave assembly is abnormal, the detection plate is driven to the abnormal position; the detection plate fixing piece is used for fixing the detection plate; and the sensor is fixed above the highest position of the counterweight, and when the counterweight is located at the uppermost position of the hoistway, the sensor downwards monitors whether the detection plate is located at the abnormal position or not. The device is simple in structure, and can simultaneously detect that the steel wire rope is separated from the groove, the bearing rotates in the fixed seat and the clamping plate falls off on the premise that a traveling cable is not added on the counterweight side.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a device for detecting a state of a reverse pulley. The present invention also relates to a method for controlling the device for detecting a state of a reverse pulley. Background Art

[0002] The current elevator mechanical system generally adopts traction drive, and the winding ratio has gradually developed from 1:1 to 2:1 or even 4:1. For traction drive systems with a ratio greater than 1:1, one or more movable pulleys, called anti-ropes, are configured on the counterweight and the car.

[0003] When the anti-ropes pulley fails, such as the traction wire rope slipping out of the groove and cutting the bearing, the rope pulley bearing rotation is blocked, and the anti-ropes pulley bearing clamping plate falls off, it will cause serious safety accidents.

[0004] The car-side return pulley is close to the car, so the vibration and noise caused by the fault can be quickly identified in the early stage of the fault. The counterweight-side return pulley is flexibly connected to the car through the wire rope and is far away. The vibration is filtered by the flexible component and the noise is attenuated in the air, which is not easy to be identified by the passengers in the car. Therefore, it is easy to cause the fault to expand and eventually cause a major safety accident such as the return pulley falling off.

[0005] In the prior art, the sensor is fixed on the counterweight frame. If the sensor is powered, a cable needs to be added to the counterweight side. Since the counterweight moves together, this cable is called a traveling cable.

[0006] For the detection of the counterweight return rope pulley, CN117755929A, a detection method for the displacement detection system of the elevator counterweight return rope pulley, requires the use of 4 sensors for monitoring, and requires the addition of a traveling cable on the counterweight side. CN102491142A, a structure for detecting the use status of the return rope pulley rolling bearing on the elevator car frame or counterweight frame, proposes a simple method for detecting the rotation of the counterweight rope pulley bearing, which also requires the addition of an additional traveling cable on the counterweight side, and cannot detect the failure mode of the wire rope de-grooving and cutting the bearing. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a simple detection device and method, which can simultaneously detect the wire rope being out of the groove, the bearing rotating in the fixed seat and the clamping plate falling off without adding a traveling cable on the counterweight side.

[0008] In order to solve the above technical problems, the present invention provides a counter-ropes state detection device, comprising: a counter-ropes assembly, including a wire rope, a pulley shaft, and a clamping plate; a detection assembly, including a detection plate and a detection plate fixing part, when the wire rope, the pulley shaft or the clamping plate in the counter-ropes assembly is abnormal, the detection plate is driven to the abnormal position; the detection plate fixing part is used to fix the detection plate; a sensor, fixed above the highest position of the counterweight, when the counterweight is located at the top of the shaft, the sensor monitors downward whether the detection plate is in an abnormal position.

[0009] Preferably, the detection assembly also includes a hitting rod; when the wire rope is out of the groove, the out-of-the-groove wire rope will deviate the hitting rod during movement, and at the same time drive the detection plate to move.

[0010] Preferably, the detection assembly is arranged beside the return rope pulley on the counterweight side; one end of the detection plate fixing piece is connected to the detection plate, and the other end is fixedly connected to the return rope pulley supporting frame.

[0011] Preferably, the detection assembly is arranged between the rope pulley shaft on the counterweight side and the clamping plate; one end of the detection plate fixing piece is connected to the detection plate, and the other end is fixedly connected to the rope pulley shaft of the counterweight.

[0012] Preferably, the sensor is a photoelectric retro-reflective sensor;

[0013] The detection component also includes a reflector, which is installed on the counterweight wheel cover or the detection plate.

[0014] Preferably, the sensor is a TOF light distance flight sensor.

[0015] The present invention also discloses a control method for a counter-ropes pulley state detection device, which determines that a counterweight counter-ropes pulley fault exists and performs preset processing after the sensor detects that an abnormality exists in a detection board.

[0016] Preferably, the preset processing is that the elevator control system issues an instruction to stop at the nearest floor and sends a fault signal.

[0017] Preferably, the preset processing is to disconnect the safety circuit and cause the elevator to stop urgently.

[0018] Preferably, the preset process is to directly disconnect the feedback loop of the brake contacts.

[0019] The present invention can simultaneously detect the wire rope being out of the groove, the bearing rotating in the fixing seat and the clamping plate falling off without adding an accompanying cable on the counterweight side. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0021] Figure 1 Schematic diagram of the anti-ropes pulley state detection device of Example 1.

[0022] Figure 2 Schematic diagram of the anti-ropes state detection device of the second embodiment.

[0023] Figure 3 Schematic diagram of the anti-ropes state detection device of the third embodiment.

[0024] Figure 4 A three-dimensional diagram of the anti-ropes state detection device of embodiment 3

[0025] Description of Reference Numerals

[0026] 1 sensor 2 Detection board 3 Detection board fixing parts 4 Anti-ropes support frame 5 Hitting the club 6 Rope pulley shaft 7 Pallet DETAILED DESCRIPTION

[0027] 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.

[0028] Example 1

[0029] like Figure 1 As shown, the present invention discloses a device for detecting the state of a counter pulley, including a counter pulley assembly, a detection assembly and a sensor. The counter pulley assembly includes a steel wire rope, a pulley shaft and a clamping plate; the detection assembly includes a detection plate 2 and a detection plate fixing member 3. When an abnormality occurs to the steel wire rope, the pulley shaft or the clamping plate in the counter pulley assembly, the detection plate is driven to an abnormal position; the detection plate fixing member 3 is used to fix the detection plate 2; the sensor 1 is fixed above the highest position of the counterweight. When the counterweight is located at the top of the shaft, the sensor monitors downward whether the detection plate is in an abnormal position.

[0030] The detection assembly is arranged beside the return rope pulley on the counterweight side; one end of the detection plate fixing part 1 is connected to the detection plate 2, and the other end is fixedly connected to the return rope pulley supporting frame 4.

[0031] In this embodiment, the detection assembly further includes a rod 5; the rod 5 ( Figure 1 Indicated by black dots, Figure 4The position of the hitting rod can be clearly seen in the figure. It is a thin rod set on the detection plate fixing part 1. After the wire rope moves inward, the detection mechanism is triggered by the hitting rod. When the wire rope is out of the groove, the out-of-groove wire rope will deviate the hitting rod during the movement, and at the same time drive the detection plate to move.

[0032] The sensor 1 is fixed through a guide rail or a wall, fixed above the highest position of the counterweight (when the car is at the bottom), and monitors downward whether the detection plate 2 is in place.

[0033] When the counterweight is at the top of the shaft, the control system monitors the detection plate 2 through the sensor 1. When the sensor detects the detection plate 2, it can be proved that the counterweight wire is not out of the groove.

[0034] When the wire rope is out of the groove, the out-of-the-groove wire rope moves in the direction of hooking the bearing. During the movement, the driving rod 5 is deflected and the detection plate 2 is displaced.

[0035] Since the detection distance of sensor 1 cannot cover the entire travel of the counterweight (because the distance between the sensor and the detection plate is too far to detect), the sensor only detects when the counterweight is at the top of the shaft, that is, when the car returns to the bottom floor.

[0036] In this way, when the counterweight runs to the highest point, the sensor can detect that the detection plate is no longer in its original position, that is, it is in an abnormal position.

[0037] Afterwards, the sensor signal is sent to the control system, which can determine that the anti-ropes pulley has a fault and prevent the elevator from starting next time, thus ensuring the safety of the passengers.

[0038] In this embodiment, the sensor may be a common sensor or the following sensor:

[0039] Photoelectric retro-reflective sensor: Retro-reflective photoelectric sensor needs to be equipped with a reflective plate. The reflective plate can be installed on the counterweight wheel cover or the detection plate. When the reflective plate is installed on the detection plate, when the counterweight is on the upper part of the shaft, it can detect whether there is reflected light. When there is no reflected light, it can be determined that the detection plate is damaged and the counterweight counter rope pulley is faulty. When the reflective plate is installed on the counterweight wheel cover below the detection plate, when the counterweight is on the upper part of the shaft, it can detect whether there is reflected light. When reflected light is detected, it can be determined that the detection plate is damaged and the counterweight counter rope pulley is faulty.

[0040] TOF optical flight distance sensor: When the counterweight is on the top layer, the TOF sensor can detect the distance X1 from the sensor to the detection plate. When the counterweight returns to the top layer next time, the TOF sensor can detect the distance X2 from the sensor to the detection plate. If X2 = X1 or the distance difference between X2 and X1 is very small, it can be determined that the detection plate remains in place. If X2 is significantly greater than X1, it can be determined that the detection plate is damaged and the counterweight pulley is faulty.

[0041] When the sensor detects a fault, the sensor signal is sent to the control system, and the control system can determine that the counter-ropes are faulty, preventing the elevator from starting next time to ensure the safety of passengers. Since the contact signal of the sensor is sent to the control system, after the control system detects the counter-ropes fault, it controls the elevator to stop at the nearest floor, evacuates passengers and sends a fault signal to the outside.

[0042] In addition, the contacts of the sensor can also be connected in series with the safety circuit. When the sensor detects a failure in the counterweight counter rope pulley, the safety circuit is directly disconnected and the elevator stops urgently.

[0043] The sensor contacts can also be connected in series with the feedback loop of the brake contacts. After the sensor detects a counterweight counter rope pulley failure, it directly disconnects the feedback loop of the brake contacts. Since the feedback loop of the brake contacts is originally disconnected during operation, the elevator will not stop running at this time, but will detect a fault before the next start and cannot start.

[0044] Example 2

[0045] like Figure 2 As shown, the difference between Example 2 and Example 1 is that the detection assembly only includes the detection plate 2 and the detection plate fixing member 3, and the detection assembly is installed between the counterweight side rope pulley shaft 6 and the clamping plate 7. One end of the detection plate fixing member 3 is connected to the detection plate 2, and the other end is fixedly connected to the rope pulley shaft 6 of the counterweight.

[0046] The sensor 11 is fixed through a guide rail or a wall, fixed above the highest position of the counterweight, and monitors downward whether the detection plate is in place.

[0047] When the counterweight is at the top of the hoistway, the control system monitors the detection plate 2 through the sensor 1. When the sensor 1 detects the detection plate, it can be proved that there is no jamming of the anti-ropes pulley bearing or the falling of the card plate.

[0048] When the sheave shaft 6 is blocked, the sheave shaft 6 rotates in the mounting seat. At this time, the mechanical detection device will rotate with the sheave shaft because it is fixed between the sheave shaft 6 and the clamping plate 7. When the detection plate 2 rotates a certain angle, the sensor 1 cannot detect the detection plate.

[0049] When the deflector pulley clamping plate 7 falls, the detection plate 2 falls together with the deflector pulley, and the sensor cannot detect the detection plate.

[0050] Example 3

[0051] like Figure 3 As shown, on the basis of embodiment 2, embodiment 3 further adds a hitting rod 5. Figure 4 As shown, the hitting rod 5 is a thin rod set on the detection plate fixing part 1. After the wire rope moves inward, the detection mechanism is triggered by the hitting rod. When the wire rope is out of the groove, the out-of-groove wire rope will deflect the hitting rod during the movement, and at the same time drive the detection plate to move. In this way, the sensor can simultaneously monitor whether the anti-rope pulley has no wire out of the groove, the rope pulley shaft is blocked, or the clamping plate falls off.

[0052] 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. A device for detecting the state of a reverse pulley, characterized in that: include: The anti-ropes assembly includes a steel wire rope, a rope pulley shaft, and a clamping plate; The detection assembly includes a detection plate and a detection plate fixing member. When an abnormality occurs to the wire rope, the rope pulley shaft or the clamping plate in the anti-ropes assembly, the detection plate is driven to the abnormal position; the detection plate fixing member is used to fix the detection plate; The sensor is fixed above the highest position of the counterweight. When the counterweight is located at the top of the shaft, the sensor monitors downward whether the detection plate is in an abnormal position.

2. The anti-ropes state detection device according to claim 1, characterized in that: The detection component also includes a hitting rod; when the wire rope is out of the groove, the out-of-the-groove wire rope will deviate the hitting rod during movement, and at the same time drive the detection plate to move.

3. The anti-ropes state detection device according to claim 1, characterized in that: The detection component is arranged beside the return rope wheel on the counterweight side; one end of the detection plate fixing piece is connected to the detection plate, and the other end is fixedly connected to the return rope wheel supporting frame.

4. The anti-ropes state detection device according to claim 1, characterized in that: The detection component is arranged between the rope pulley shaft on the counterweight side and the clamping plate; one end of the detection plate fixing piece is connected to the detection plate, and the other end is fixedly connected to the rope pulley shaft of the counterweight.

5. The anti-ropes state detection device according to claim 1, characterized in that: The sensor is a photoelectric regression reflection sensor; The detection component also includes a reflector, which is installed on the counterweight wheel cover or the detection plate.

6. The anti-ropes state detection device according to claim 1, characterized in that: The sensor is a TOF light flight distance sensor.

7. A control method using the anti-ropes state detection device according to any one of claims 1 to 6, characterized in that: After the sensor detects an abnormality in the detection board, it determines that the counterweight counter rope pulley is faulty and performs preset processing.

8. The anti-ropes state detection device according to claim 7, characterized in that: The preset processing is that the elevator control system issues an instruction to stop at the nearest floor and sends a fault signal.

9. The anti-ropes state detection device according to claim 7, characterized in that: The preset process is to disconnect the safety circuit and cause the elevator to stop suddenly.

10. The anti-ropes state detection device according to claim 7, characterized in that: The preset process is to directly disconnect the feedback loop of the brake contact.

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