A bottom-discharge skip guide wheel hook closure status detection device

Abstract

This utility model relates to the field of safety monitoring of mine hoisting equipment, and discloses a bottom-discharge skip guide wheel hook closure status detection device, including a power supply unit and a wireless bridge front end. The power supply unit and the wireless bridge front end are jointly installed in a stainless steel sealed waterproof box, which is fixedly installed on the top of the skip. A detection sensing unit is installed in another sealed stainless steel box, which is fixed to the base of the skip guide wheel hook. A wireless bridge base station is also included. This utility model utilizes a passive magnetic switch and high-strength magnetic beads for non-contact sensing, eliminating mechanical wear, resisting dust and oil interference, ensuring long lifespan, and providing accurate and reliable detection results. Signal transmission via an industrial-grade wireless bridge avoids laying excessively long wired communication cables on the moving skip, solving the problems of easy wear, tangling, and difficult maintenance of cables inside the mine shaft.

Description

Technical Field

[0001] This utility model relates to the field of safety monitoring of mine hoisting equipment, and in particular to a bottom-discharge skip guide wheel hook closure status detection device. Background Technology

[0002] Bottom-discharge skips are key equipment in mine shaft hoisting systems. Their bottoms unload ore via a set of guide wheel hooks and a bottom wheel mechanism. When the skip is unloading at the unloading station, the guide wheels enter the unloading rail, and the guide wheel hooks open. After unloading, the hooks must reliably close and reset to ensure the safety of the skip during hoisting and operation. If the hooks fail to fully reset after the skip leaves the unloading station, or if they accidentally open due to vibration, impact, or other reasons during operation, the bottom gate of the skip will open abnormally, causing ore to fall into the shaft. This will damage the skip's tail rope, tail rope railings, and other critical equipment, easily leading to serious accidents such as skip jamming or falling, and even damage to shaft facilities and personnel injuries, posing a significant safety hazard.

[0003] Currently, monitoring the status of skip guide wheel hooks mainly relies on visual observation by hoist operators or inspectors. This method has the following significant drawbacks: 1. Poor reliability: It is easily missed or misjudged due to factors such as light, dust, and personnel fatigue; 2. Insufficient real-time performance: Similar testing products can only perform fixed-point testing on the skip at the unloading station and cannot perform dynamic monitoring after the skip is in operation, making it impossible to issue alarms and take safety measures immediately when a fault occurs; 3. Low degree of automation: It cannot be linked with the automatic control system of modern hoists, making it difficult to achieve inherent safety.

[0004] Therefore, there is an urgent need for a device that can detect the status of the skip guide wheel hook in real time, automatically and reliably, and can promptly upload fault signals to the hoist main control system, so as to completely eliminate this major safety hazard. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a bottom-discharge skip guide wheel hook closure status detection device, which aims to improve the problems of "poor reliability, insufficient real-time performance and low degree of automation" in the prior art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a bottom-discharge skip guide wheel hook closure status detection device, comprising: The power supply unit and the wireless bridge front end are installed together in a stainless steel sealed waterproof box, which is fixedly installed on the top of the bucket. A detection sensing unit is installed in another sealed stainless steel box, which is fixed to the base of the skip guide wheel hook. A wireless bridge base station, wherein the wireless bridge base station is installed at the unloading station at the top of the shaft; The hoist main control system includes a hoist main control PLC, which is connected to the wireless bridge base station via an unloading station PLC to receive skip guide wheel hook status signals.

[0007] As a further description of the above technical solution: The power supply unit includes a battery and its charging management circuit. The power output of the power supply unit is connected to a cable via a waterproof aviation plug to achieve power connection with the detection sensing unit and the front end of the wireless bridge.

[0008] As a further description of the above technical solution: The detection sensing unit includes a micro PLC and at least one passive magnetic switch, with the sensing surface of the passive magnetic switch facing the closed position of the skip guide wheel hook.

[0009] As a further description of the above technical solution: The power input terminal of the micro PLC is connected to the power supply unit via a cable connected by a waterproof aviation plug.

[0010] As a further description of the above technical solution: The detection sensing unit also includes a high-strength magnetic bead, which is fixedly installed on the hook movable part of the skip guide wheel by a support plate. When the skip guide wheel hook is closed and reset, the high-strength magnetic bead moves with the hook to a position directly opposite the passive magnetic switch. Under the action of the magnetic field, the normally open contact inside the passive magnetic switch closes, generating a switching signal and transmitting it to the input point of the micro PLC.

[0011] As a further description of the above technical solution: The wireless bridge front end is connected to the communication port of the micro PLC via a network cable to receive the hook status signal sent by the micro PLC. The wireless bridge base station is powered by a PoE module and communicates with the unloading station PLC or the host computer system.

[0012] As a further description of the above technical solution: A wireless microwave link is established between the front end of the wireless bridge and the base station of the wireless bridge to transmit the hook status signal in the well to the hoist main control system in real time and wirelessly.

[0013] As a further description of the above technical solution: The hoist main control PLC receives the hook status signal sent by the unloading station PLC or directly from the wireless bridge base station, and performs logical judgment on the signal.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by using a passive magnetic switch and a high-strength magnetic bead for non-contact sensing, there is no mechanical wear, it is resistant to dust and oil interference, has a long lifespan, and the detection results are accurate and reliable.

[0015] 2. In this utility model, the signal is transmitted through an industrial-grade wireless bridge, which avoids laying excessively long wired communication cables on the moving skip and solves the problems of easy wear, easy tangling, and difficult maintenance of cables inside the well shaft.

[0016] 3. In this utility model, all downhole equipment is installed in a stainless steel sealed waterproof box, which has a high protection level and is suitable for harsh environments such as dampness, water spray and impact in the well. The power supply unit is powered by a battery, so there is no need to draw power from the well. Moreover, the battery can be directly replaced, which is safe and convenient.

[0017] 4. In this utility model, by finally connecting the detection signal to the hoist's main control PLC, automated alarm and safety interlock control can be realized, which greatly improves the inherent safety level of the hoisting system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stainless steel sealed waterproof box and high-strength magnetic beads in this utility model; Figure 2 This is a schematic diagram of the installation of the detection device and a system block diagram of this utility model; Figure 3 This is a schematic diagram illustrating the working principle of the detection device in this utility model.

[0019] Legend: 1. Stainless steel sealed waterproof enclosure; 2. Detection sensor unit; 3. Skip guide wheel hook; 4. Support plate; 5. High-strength magnetic beads. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figure 1 - Figure 3This utility model provides an embodiment of a bottom-discharge skip guide wheel hook closure status detection device, comprising: a power supply unit and a wireless bridge front end, a detection sensor unit 2, a wireless bridge base station, and a hoist main control system. The power supply unit uses a 100AH ​​DC24V lithium iron phosphate battery pack, equipped with reverse connection, overcharge, and over-discharge protection circuits, and is encapsulated in a stainless steel sealed waterproof housing 1. The stainless steel sealed waterproof housing 1 is fixed to a flat area on the top of the skip by a bracket. The wireless bridge front end and the base station are a pair of industrial-grade wireless bridges supporting the 5GHz band and MIMO technology, with a transmission bandwidth of not less than 100Mbps. To ensure stable signal penetration through the wellbore environment, the micro PLC for the detection sensor unit 2 is an intrinsically safe or mine-use explosion-proof micro PLC with 4 input / 4 output I / O points, such as the Siemens S7-1200 series or equivalent. The passive magnetic switch is selected with a detection distance slightly greater than the maximum misalignment distance between the magnetic bead and the switch, such as a detection distance of 10mm. The power supply unit and the wireless bridge front end are installed together in a stainless steel sealed waterproof enclosure 1, which is fixedly installed on the top of the skip. The detection sensor unit 2 is installed near the skip guide wheel hook 3. The detection sensor unit 2 is installed in another sealed... Inside the stainless steel housing, a sealed stainless steel enclosure is fixed to the base of the skip guide wheel hook 3. A wireless bridge base station is installed at the unloading station at the top of the shaft. The hoist main control system includes a hoist main control PLC, which communicates with the wireless bridge base station via the unloading station PLC. The hoist main control PLC controls deceleration and stopping at high speeds and immediately stops at low speeds, receiving status signals from the skip guide wheel hook 3. The power supply unit includes a battery and its charging management circuit. The battery in the power supply unit has a voltage display, allowing users to observe the voltage level. By checking the voltage daily, the battery needs to be replaced when it drops below 23.5V. The power output of the power supply unit is connected to the cable via a waterproof aviation plug to achieve power connection with the detection sensor unit 2 and the front end of the wireless bridge. The waterproof aviation plug connection cable provides a stable power supply to the detection sensor unit 2 and the front end of the wireless bridge. The detection sensor unit 2 includes a micro PLC and at least one passive magnetic switch. The sensing surface of the passive magnetic switch faces the closed position of the skip guide wheel hook 3. The micro PLC can transmit vertically and has a wide transmission range, which can be used for full-process detection without fixed-point detection. The wireless 5G bridge has a long transmission distance and is safe and reliable. The micro PLC is a programmable logic controller, and the passive magnetic switch is a proximity switch.

[0022] Reference Figure 1 - Figure 3The power input terminal of the micro PLC is connected to the power supply unit via a cable with a waterproof aviation connector. The detection sensing unit 2 also includes a high-strength magnetic bead 5. The high-strength magnetic bead 5 is made of neodymium iron boron N52 grade strong magnet, which is glued to the appropriate position of the hook with high-strength epoxy resin or fixed with screws. The high-strength magnetic bead 5 is fixedly installed on the moving part of the skip guide wheel hook 3 by a support plate 4. The support plate 4 is made of L-shaped brass and welded to the moving part of the skip guide wheel hook 3. When the skip guide wheel hook 3 is closed and reset, the high-strength magnetic bead 5 moves with the hook to the position opposite the passive magnetic switch. Under the action of the magnetic field, the normally open contact inside the passive magnetic switch closes, generating a switching signal and transmitting it to the input point of the micro PLC. The wireless bridge front end is connected to the communication port of the micro PLC via a network cable. The connection is established to receive hook status signals sent by the micro PLC. The wireless bridge base station is powered by a PoE module and communicates with the unloading station PLC or the host computer system. The PoE module is an Ethernet power supply module. A wireless microwave link is established between the wireless bridge front end and the wireless bridge base station to transmit the hook status signals in the mine to the hoist main control system in real time and wirelessly. The hoist main control PLC receives the hook status signals sent by the wireless bridge base station through the unloading station PLC or directly, and performs logical judgment on the signals. When it is detected that the hook is not closed after loading or changes from closed to open during operation, the main control PLC immediately issues an audible and visual alarm and can link to control the hoisting system to decelerate or perform emergency safety braking, thereby avoiding major accidents.

[0023] Working Principle: During operation, after the skip is raised to the unloading station at the wellhead and unloaded, it begins its descent. When the skip guide wheel hook 3 leaves the unloading rail, the hook should close and reset. The high-strength magnetic bead 5 fixed on the hook moves to a position directly opposite the passive magnetic switch, with a gap of approximately 5-8mm. The magnetic switch activates under the influence of the magnetic field, closing its normally open contact. This closing signal is sent to the DI input point of the micro PLC. The PLC's internal program continuously scans the status of this input point. When the signal is detected as "1", indicating a closed state, it is determined that the hook closure is normal. The PLC then sends the hook closure status signal through its communication interface. The wireless bridge front end packages the signal and transmits it through an antenna to the wireless bridge base station at the wellhead. The base station is powered by PoE and receives the signal, then transmits it via Ethernet to the PLC or industrial control computer at the unloading station. The unloading station PLC then transmits this signal via industrial Ethernet to the main control PLC in the hoist's main control room. The main control PLC performs logical operations on this signal and the hoist's operating status. If it detects that the skip has left the bottom of the well but the hook status signal is 0 (not closed), it immediately triggers the audible and visual alarm and displays an emergency alarm message on the operator's screen. At the same time, it can automatically execute deceleration or emergency stop procedures according to the safety policy to ensure safety.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting the closed state of a bottom-discharge skip guide wheel hook, characterized in that, include: The power supply unit and the wireless bridge front end are installed together in a stainless steel sealed waterproof box (1), and the stainless steel sealed waterproof box (1) is fixedly installed on the top of the bucket. The detection sensing unit (2) is installed in another sealed stainless steel box, which is fixed on the base of the skip guide wheel hook (3). A wireless bridge base station, wherein the wireless bridge base station is installed at the unloading station at the top of the shaft; The hoist main control system includes a hoist main control PLC, which is connected to the wireless bridge base station via the unloading station PLC to receive the status signal of the skip guide wheel hook (3).

2. A bottom discharge pan conveyor guide roller hook closed state detecting device according to claim 1, characterized in that: The power supply unit includes a battery and its charging management circuit. The power output of the power supply unit is connected to a cable via a waterproof aviation plug to achieve power connection with the detection sensing unit (2) and the front end of the wireless bridge.

3. A bottom discharge pan conveyor guide roller hook closed state detecting device according to claim 1, characterized in that: The detection sensing unit (2) includes a micro PLC and at least one passive magnetic switch, the sensing surface of which faces the closed position of the guide wheel hook (3).

4. A bottom discharge pan conveyor guide roller hook closed state detecting device according to claim 3, characterized in that: The power input terminal of the micro PLC is connected to the power supply unit via a cable connected by a waterproof aviation plug.

5. A bottom discharge pan conveyor guide roller hook closed state detecting device according to claim 3, characterized in that: The detection sensing unit (2) also includes a high-strength magnetic bead (5). The high-strength magnetic bead (5) is fixedly installed on the movable part of the skip guide wheel hook (3) by a support plate (4). When the skip guide wheel hook (3) is closed and reset, the high-strength magnetic bead (5) moves with the hook to the position opposite to the passive magnetic switch. Under the action of the magnetic field, the normally open contact inside the passive magnetic switch closes, generating a switching signal and transmitting it to the input point of the micro PLC.

6. A bottom discharge pan conveyor guide roller hook closed state detecting device according to claim 3, characterized in that: The wireless bridge front end is connected to the communication port of the micro PLC via a network cable to receive the hook status signal sent by the micro PLC. The wireless bridge base station is powered by a PoE module and communicates with the unloading station PLC or the host computer system.

7. A bottom discharge pan conveyor guide roller hook closed state detecting device according to claim 6, characterized in that: A wireless microwave link is established between the front end of the wireless bridge and the base station of the wireless bridge to transmit the hook status signal in the well to the hoist main control system in real time and wirelessly.

8. A bottom discharge pan conveyor guide roller hook closed state detecting device according to claim 3, characterized in that: The hoist main control PLC receives the hook status signal sent by the unloading station PLC or directly from the wireless bridge base station, and performs logical judgment on the signal.

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