An inclined shaft skip car derailment automatic detection device and skip car system

Abstract

The application discloses a kind of inclined shaft skip car derailment automatic detection device and skip car system, wherein device four laser ranging sensors, vehicle-mounted wireless signal sending device, multiple wireless signal receiving modules and derailment detection controller;Four laser ranging sensors are used to detect the distance from track and output transmission to vehicle-mounted wireless signal sending device;Vehicle-mounted wireless signal sending device is used to wirelessly send the distance data received to wireless signal receiving module;Wireless signal receiving module is used to send the distance data received to derailment detection controller;Derailment detection controller is used to receive distance data and compare with preset threshold value, when the distance data received exceeds preset threshold value, send alarm signal.The detection scheme takes distance as the basis for judgment, real-time, high detection result accuracy, can timely and accurately detect derailment accident, so as to stop in time, avoid accident expansion, further improve the inclined shaft skip car operation safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric control device, and particularly relates to a chute derailment automatic detection device for an inclined shaft and a chute system. BACKGROUND

[0002] The chute is a transportation tool in a mine. Due to complex working conditions, chute derailment often occurs. According to analysis of most chute derailment conditions in inclined shafts, the main reasons for derailment are as follows: 1. There are stones or sundries on the transportation track; 2. The wheels are seriously worn or the linkage mechanical structure of the wheels and the chute is damaged; and 3. The levelness and straightness of the track bed do not meet the requirements. Based on this situation, a derailment detection technology is proposed.

[0003] The traditional derailment detection methods include the following:

[0004] When the chute is lowered and derails, a large frictional resistance is generated due to strong extrusion of the wheels and the track or the ground, which causes the chute to be stuck or the moving speed of the chute to be less than the speed of the roller, so that the steel wire rope is loosened, and the corresponding slack rope protection switch is actuated.

[0005] When the chute is lifted and derails, the wheels are also affected by the frictional force generated by the extrusion of the wheels and the track or the ground,

[0006] which causes the load of the hoist motor to increase, and further causes the torque of the motor to suddenly increase. A corresponding current detection program is programmed in the control system, and a suitable current detection threshold is set. When the motor current exceeds the set value, the system determines that the overload occurs and reports a fault. The threshold set by this method cannot be too small, otherwise false reporting will cause frequent tripping. When the threshold is set too large, sometimes the protection function cannot be played.

[0007] When the chute is lowered and derails or the chute is lifted and derails, the change rate of the current\torque can also be detected. In a specific operating area, the change rate of the current\torque of the motor is monitored in real time through the program algorithm of the PLC. When the chute does not derail, the change rate of the current\torque is a linear data that changes with the position of the chute in real time. When the chute derails, the change rate of the current\torque of the hoist main motor will have a relatively large data in an instant when the derailment occurs. When the data exceeds the set value, it is considered that the chute derails.

[0008] The traditional detection method has the advantages of not needing to increase any additional hardware and low cost. However, the disadvantages are also obvious, such as: when the chute is lowered and derails, if the moving speed does not decrease greatly, the slack rope protection will not be actuated in a short time; when the chute is lifted and derails, if the load of the chute is small, the increase of the motor current cannot meet the requirement of the protection value, so the fault cannot be reported. Therefore, the existing traditional chute derailment detection method has low detection accuracy and cannot timely find the derailment condition. SUMMARY

[0009] The application provides a device for automatically detecting the derailment of a skip in an inclined shaft and a skip system to solve the problem of low detection accuracy of the existing skip derailment.

[0010] In a first aspect, a device for automatically detecting the derailment of a skip in an inclined shaft is provided, comprising four laser ranging sensors arranged on the inner side of the four wheels of the skip and located directly above the track, a vehicle-mounted wireless signal sending device arranged on the skip, a plurality of wireless signal receiving modules arranged at intervals along the inclined shaft, and a derailment detection controller.

[0011] The four laser ranging sensors are connected to the vehicle-mounted wireless signal sending device; the plurality of wireless signal receiving modules are in communication connection with the derailment detection controller.

[0012] The four laser ranging sensors are used to detect the distance between them and the track and output the distance data to the vehicle-mounted wireless signal sending device.

[0013] The vehicle-mounted wireless signal sending device is used to wirelessly send the received distance data to the wireless signal receiving modules.

[0014] The wireless signal receiving modules are used to send the received distance data to the derailment detection controller.

[0015] The derailment detection controller is used to receive the distance data and compare it with a preset threshold value, and when the received distance data exceeds the preset threshold value, an alarm signal is sent.

[0016] When the skip is running normally on the track, the distance between the laser ranging sensors and the track is stable within a certain range, and when the wheels derail or fall off, the distance between the corresponding laser ranging sensors and the track will exceed this range. Based on this principle, by collecting the distance value between the laser ranging sensors and the track and comparing it with a preset threshold value, it can be determined whether there is a derailment or wheel falling off phenomenon. This detection scheme uses distance as the basis for judgment, has high real-time performance, and the detection result is accurate.

[0017] Further, the four laser ranging sensors are fixed to the inner side of the four wheels of the skip through a sensor support, and the four laser ranging sensors are connected to the vehicle-mounted wireless signal sending device through a cable.

[0018] Further, the vehicle-mounted wireless signal sending device comprises a distance signal processing controller, a wireless signal sending module, and a battery; the wireless signal sending module is in communication connection with the distance signal processing controller, and the distance signal processing controller and the wireless signal sending module are electrically connected to the battery.

[0019] The battery supplies power to the distance signal processing controller and the wireless signal sending module, the distance signal processing controller processes the distance signal transmitted by the laser ranging sensor and sends it to the wireless signal receiving module through the wireless signal sending module. The vehicle-mounted wireless signal sending device is installed on the skip by using the mounting method of shock-absorbing cushion.

[0020] Further, the plurality of wireless signal receiving modules are all in communication connection with the derailment detection controller through an optical fiber network. The optical fiber network has fast transmission speed and can timely find the derailment accident and has good real-time performance.

[0021] Further, the optical fiber network comprises a single-mode optical fiber and optical fiber transceivers connected to both ends of the single-mode optical fiber.

[0022] Further, the distance between the adjacent wireless signal receiving modules is 40-60 m.

[0023] Further, the sensing distance of the four laser ranging sensors is not less than 25 mm.

[0024] Further, the derailment detection controller is also in communication connection with the elevator controller of the elevator, the derailment detection controller is also used for sending an alarm signal to the elevator controller when detecting that the derailment occurs, and the elevator controller is used for controlling the elevator to stop when receiving the alarm signal. The derailment detection controller is in communication connection with the elevator controller, so that when the derailment accident is detected, the elevator can be immediately and urgently stopped, and the accident can be prevented from being expanded.

[0025] Further, the derailment detection controller is also used for acquiring the stroke amount of the elevator from the elevator controller in real time, outputting the position where the derailment occurs, and outputting a corresponding statistical table of the stroke amount and the detected distance for derailment prevention analysis.

[0026] When the derailment accident is detected, the stroke amount of the elevator at this time is acquired, and the position where the derailment accident occurs can be determined. By statistically analyzing the corresponding relationship between the stroke amount and the detected distance, when the distance corresponding to a stroke area keeps close to the end value of the preset threshold value for multiple times, it is indicated that there is a derailment risk, and the staff can be reminded to perform maintenance in advance to prevent the derailment accident and reduce the number of derailments.

[0027] In the second aspect, a skip system is provided, comprising an elevator, a steel wire rope and a skip, the elevator is connected with the skip through the steel wire rope, and further comprising the inclined shaft skip derailment automatic detection device as described above. The skip system has a derailment detection function, and when the derailment occurs, the elevator can be timely and urgently stopped to avoid the accident from being expanded.

[0028] Advantages

[0029] The application provides an inclined shaft skip bucket derailment automatic detection device and a skip bucket system. When the skip bucket normally runs on the track, the distance between the laser ranging sensor and the track is stable within a certain range. When the wheel derails or the wheel falls off, the distance between the corresponding laser ranging sensor and the track will exceed the range. Based on this principle, the distance value between the laser ranging sensor and the track is collected and compared with the preset threshold value, so as to determine whether the derailment or wheel falling off phenomenon exists. The detection scheme takes distance as the judgment basis, has high real-time performance, high detection result accuracy, can timely and accurately detect the derailment accident, so as to timely stop the vehicle and avoid the accident expansion, and further improves the operation safety of the inclined shaft skip bucket. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0031] Figure 1 It is a structure schematic diagram of the inclined shaft skip bucket derailment automatic detection device provided by the embodiment of the present application.

[0032] Figure 2 It is an electrical control principle diagram of the inclined shaft skip bucket derailment automatic detection device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments only show some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0034] Embodiment 1

[0035] As shown in Figure 1 and Figure 2 , the present embodiment provides an inclined shaft skip bucket derailment automatic detection device, which comprises four laser ranging sensors 1 arranged on the inner side of four wheels 6 of a skip bucket 5 and located directly above the track, a vehicle-mounted wireless signal sending device 2 arranged on the skip bucket 5, a plurality of wireless signal receiving modules 3 arranged along the inclined shaft at intervals, and a derailment detection controller 7.

[0036] The four laser ranging sensors 1 are connected with the vehicle-mounted wireless signal sending device 2; the plurality of wireless signal receiving modules 3 are in communication connection with the derailment detection controller 7.

[0037] The four laser ranging sensors 1 are used to detect the distance from the track and output to the vehicle-mounted wireless signal sending device 2;

[0038] The vehicle-mounted wireless signal sending device 2 is used to wirelessly send the received distance data to the wireless signal receiving module 3;

[0039] The wireless signal receiving module 3 is used to send the received distance data to the derailment detection controller 7;

[0040] The derailment detection controller 7 is used to receive distance data and compare it with a preset threshold value, and issue an alarm signal when the received distance data exceeds the preset threshold value.

[0041] When the skip 5 is running normally on the track, the distance between the laser ranging sensor 4 and the track is stable within a certain range, and the deviation will not be too large. When the wheel is off the track or the wheel is off, the distance between the corresponding laser ranging sensor 1 and the track will exceed this range. Based on this principle, by collecting the distance value of the laser ranging sensor 1 from the track and comparing it with the preset threshold value, it can be judged whether there is a derailment or wheel off phenomenon. This detection scheme takes distance as the basis for judgment, has high real-time performance, and the detection result has high accuracy; the detection device can timely and accurately issue relevant alarm signals to remind maintenance personnel to clean and maintain the track.

[0042] Specifically, the four laser ranging sensors 1 are fixedly arranged inside the four wheels 6 of the skip 5 through the sensor bracket 4, and the four laser ranging sensors 1 are connected with the vehicle-mounted wireless signal sending device 2 through cables. The sensing distance of the four laser ranging sensors 1 is not less than 25mm, and the protection level is not less than IP67.

[0043] The vehicle-mounted wireless signal sending device 2 includes a distance signal processing controller, a wireless signal sending module, and a battery. The wireless signal sending module is in communication connection with the distance signal processing controller. The distance signal processing controller and the wireless signal sending module are in electrical connection with the battery.

[0044] The battery supplies power to the distance signal processing controller and the wireless signal sending module. The distance signal processing controller processes the distance signal transmitted by the laser ranging sensor and sends it to the wireless signal receiving module through the wireless signal sending module. The vehicle-mounted wireless signal sending device is installed on the skip by using a shock-absorbing cushion mounting method. The communication between the wireless signal sending module and the wireless signal receiving module uses advanced technologies such as distance LORA spread spectrum wireless data communication technology, long-distance wireless digital audio and video transmission technology, and edge computing to ensure the rapidity and stability of communication.

[0045] In the embodiment, the plurality of wireless signal receiving modules 3 are in communication connection with the derailment detection controller 7 through an optical fiber network. The optical fiber network comprises a single-mode optical fiber and fiber transceivers connected to both ends of the single-mode optical fiber. The optical fiber network has fast transmission speed and can timely detect derailment accidents and has good real-time performance. The distance between adjacent wireless signal receiving modules 3 is 40-60 m, and in the embodiment, 50 m is preferred.

[0046] Preferably, the derailment detection controller 7 is also in communication connection with a hoist controller 8 of the hoist; the derailment detection controller 7 is further configured to send an alarm signal to the hoist controller 8 when a derailment is detected; and the hoist controller 8 is configured to control the hoist to stop when the alarm signal is received. The communication connection between the derailment detection controller 7 and the hoist controller 8 can achieve that the hoist is immediately stopped in emergency when a derailment accident is detected, thereby avoiding the expansion of the accident.

[0047] Further, the derailment detection controller 7 is further configured to acquire the stroke amount of the hoist from the hoist controller 8 in real time, output the position where the derailment occurs, and output a corresponding statistical table of the stroke amount and the detected distance for derailment prevention analysis. When a derailment accident is detected, the stroke amount of the hoist at this time is acquired, and thus the position where the derailment accident occurs can be determined. By statistically analyzing the corresponding relationship between the stroke amount and the detected distance, when the distance corresponding to a certain stroke area remains close to the end value of the preset threshold value for multiple times, it indicates that there is a risk of derailment, and the staff can be reminded to perform maintenance in advance to prevent derailment accidents and reduce the number of derailments.

[0048] Embodiment 2

[0049] The embodiment provides a skip system, which comprises a hoist, a steel wire rope, and a skip, the hoist is connected with the skip through the steel wire rope, and further comprises the automatic derailment detection device for the inclined shaft skip as described above. The skip system has a derailment detection function, and when a derailment occurs, the hoist can be controlled to stop in emergency in time, thereby avoiding the expansion of the accident. The specific structures of the hoist and the skip are both prior art, and thus will not be described here.

[0050] It can be understood that the same or similar parts in the above embodiments can be mutually referred to, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0051] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present application.

Claims

1. An automatic device for detecting the derailment of a skip in an inclined shaft, characterized in that, The four laser ranging sensors are arranged inside four wheels of the skip and above the track, a vehicle-mounted wireless signal sending device is arranged on the skip, a plurality of wireless signal receiving modules are arranged at intervals along the inclined shaft, and a derailment detection controller is arranged. The four laser ranging sensors are connected with the vehicle-mounted wireless signal sending device, and the plurality of wireless signal receiving modules are in communication connection with the derailment detection controller. The four laser ranging sensors are used for detecting the distance from the track and outputting the distance data to the vehicle-mounted wireless signal sending device. The vehicle-mounted wireless signal sending device is used for wirelessly sending the received distance data to the wireless signal receiving modules. The wireless signal receiving modules are used for sending the received distance data to the derailment detection controller. The derailment detection controller is used for receiving the distance data and comparing the distance data with a preset threshold value, and an alarm signal is sent when the received distance data exceeds the preset threshold value. The derailment detection controller is also in communication connection with a hoist controller of the hoist. The derailment detection controller is also used for sending an alarm signal to the hoist controller when a derailment is detected. The hoist controller is used for controlling the hoist to stop when the alarm signal is received. The derailment detection controller is also used for obtaining the stroke amount of the hoist from the hoist controller in real time, outputting the position of the derailment, and outputting a corresponding statistical table of the stroke amount and the detected distance for derailment prevention analysis.

2. The automatic device for detecting the derailment of an inclined shaft skip according to claim 1, characterized in that, When the distance corresponding to a stroke area remains close to an end value of the preset threshold value for multiple times, it indicates that there is a risk of derailment, and the staff is reminded to perform maintenance in advance to prevent derailment accidents and reduce the number of derailments.

3. The automatic device for detecting the derailment of the inclined shaft skip according to claim 1, characterized in that, The four laser ranging sensors are fixed to the inside of the four wheels of the skip through sensor supports, and the four laser ranging sensors are connected with the vehicle-mounted wireless signal sending device through cables.

4. The automatic device for detecting the switching-off of the inclined shaft skip according to claim 1, characterized in that, The vehicle-mounted wireless signal sending device includes a distance signal processing controller, a wireless signal sending module, and a battery.

5. The automatic device for detecting the derailment of the inclined shaft skip according to claim 4, characterized in that, The wireless signal sending module is in communication connection with the distance signal processing controller, and the distance signal processing controller and the wireless signal sending module are electrically connected with the battery.

6. The automatic device for detecting the switching-off of the inclined shaft skip according to claim 1, characterized in that, The plurality of wireless signal receiving modules are in communication connection with the derailment detection controller through an optical fiber network.

7. The automatic device for detecting the switching-off of the inclined shaft skip according to claim 1, characterized in that, The optical fiber network includes a single-mode optical fiber and optical fiber transceivers connected to both ends of the single-mode optical fiber.

8. A skip system comprising a hoist, a steel wire rope, a skip, the hoist being connected to the skip by the steel wire rope, characterized in that The distance between adjacent wireless signal receiving modules is 40-60 m. The sensing distance of the four laser ranging sensors is not less than 25 mm. The application also includes the inclined shaft skip derailment automatic detection device according to any one of claims 1-7.

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