Automatic loading and unloading position control and detection device for cargo ropeway carrying hopper

Abstract

The utility model provides an automatic loading and unloading position control and detection device for a freight cableway carrying hopper, which adopts a magnetic induction switch device for position detection, is accurate and reliable in signal, improves the transportation efficiency of a freight cableway and fully guarantees the transportation production capacity, and comprises a permanent magnet arranged on a lifting rod of the carrying hopper, the magnetic induction switch detection device is mounted at the loading and unloading station; the magnetic induction switch detection device comprises at least two magnetic induction switch detection probes corresponding to the permanent magnets, the detection probes are connected with the PLC control system through a double-layer shielding cable, aviation plugs are arranged at the joints of the detection probes and the cable, and the detection probes are installed on an insulation installation base with a double-nut fixing structure. The magnetic induction switch detection probes are arranged in a redundant mode, and the multiple detection probes are arranged at intervals in the vertical direction of the insulation installation base to form a multi-channel signal detection structure.

Description

Technical Field

[0001] This utility model relates to the field of automatic control technology for freight cableways, and more specifically, to an automatic loading and unloading position control and detection device for freight cableway hoppers. Background Technology

[0002] The automatic loading and unloading position control and detection device for the freight cableway's transport hopper is a crucial component for the normal operation of the freight cableway. The transport hopper must stop precisely when it reaches the loading and unloading points. At the loading point, material is fed into the transport hopper via a feeder. At the unloading point, the transport hopper automatically tilts to unload. If the transport hopper does not reach the loading point, material cannot be loaded, and the feeder's operation will cause material spillage and accumulation. Similarly, if the transport hopper does not reach the unloading point, it may not unload material or may not completely unload it into the unloading bin, resulting in material spillage and accumulation. All of these situations affect the normal operation of the entire cableway system.

[0003] Traditional freight cableways typically use mechanical limit switches for hopper position detection, which has the following drawbacks:

[0004] 1. Mechanical contacts are prone to wear, and the lifespan of conventional switches is only 50,000 to 100,000 cycles, requiring frequent replacement and maintenance;

[0005] 2. In open-air environments, metal contacts are susceptible to corrosion from rain and snow, leading to poor contact; dusty environments can easily cause contacts to jam.

[0006] 3. The accuracy of the switch's position is limited by the mechanical structure, with a repeatability error of ±10mm;

[0007] 4. Maintenance requires disassembling the entire switch assembly, and a single maintenance session takes more than 30 minutes.

[0008] Existing improvement solutions attempt to use photoelectric sensors, laser ranging devices, or ultrasonic ranging sensors, but these solutions have the following problems in the dusty environment generated during ore loading and unloading:

[0009] 1. Dust contaminates the optical window, resulting in a false detection rate as high as 15%.

[0010] 2. Laser ranging accuracy decreases significantly under strong light interference;

[0011] 3. The sensor protection level is insufficient, and the failure rate exceeds 8 times / year. Utility Model Content

[0012] The purpose of this utility model is to provide an automatic loading and unloading position control and detection device for cargo cableway hoppers. It uses a magnetic induction switch device for position detection, which provides accurate and reliable signals, improves the transportation efficiency of cargo cableways, and fully guarantees transportation production capacity.

[0013] The embodiments of this utility model are implemented as follows:

[0014] An automatic loading and unloading position control and detection device for a freight cableway hopper includes a permanent magnet mounted on the hopper boom and a magnetic induction switch detection device installed at the loading and unloading station. The magnetic induction switch detection device includes at least two magnetic induction switch detection probes corresponding to the permanent magnet. The detection probes are connected to a PLC control system via a double-shielded cable. An aviation plug is provided at the connection between the detection probe and the cable. The detection probes are mounted on an insulating mounting base with a double-nut fixing structure.

[0015] In a preferred embodiment of this utility model, the magnetic induction switch detection probe is redundantly configured, with multiple detection probes arranged at intervals in the vertical direction of the insulating mounting base to form a multi-channel signal detection structure.

[0016] In a preferred embodiment of this utility model, the above-mentioned insulating mounting base is provided with an axial fine-tuning groove, and the detection probe is fixed on the mounting base by a double nut locking structure, wherein the double nuts are anti-loosening nylon nuts.

[0017] In a preferred embodiment of this utility model, the permanent magnet is an N52 grade sintered neodymium iron boron magnet with a nickel-copper-nickel three-layer composite plating on its surface. The magnet is directly inserted into a magnet mounting base with a snap-fit ​​structure, and epoxy resin sealant is filled into the gap of the magnet mounting base.

[0018] In a preferred embodiment of the present invention, the outer layer of the above-mentioned double-shielded cable is provided with a metal corrugated flexible tube, and the cable shielding layer is provided inside the metal corrugated flexible tube. The cable shielding layer adopts a composite shielding structure of copper mesh braiding layer and aluminum foil layer.

[0019] In a preferred embodiment of this utility model, the above-mentioned aviation plug is an M12 aviation plug connector, and the plug portion is filled with epoxy resin sealant.

[0020] In a preferred embodiment of the present invention, the magnetic induction switch detection probe is provided with a composite protective shell, which includes an aluminum alloy heat dissipation substrate and a polycarbonate heat insulation cover.

[0021] In a preferred embodiment of the present invention, the insulating mounting base includes an insulating rod and an insulating assembly base. The top of the insulating rod is connected to the loading and unloading station, the middle part extends horizontally towards the direction of the conveying hopper rod, and the bottom is provided with a vertical assembly plate. The insulating assembly base is fixed in the assembly space formed by the middle extension plate of the insulating rod and the assembly plate.

[0022] In a preferred embodiment of this utility model, the insulating mounting base is made of polytetrafluoroethylene material. The mounting surface of the insulating mounting base is provided with an anti-slip toothed structure, and both ends are provided with M8 standard mounting holes to fix the insulating mounting base on the insulating rod.

[0023] In a preferred embodiment of this utility model, the installation distance between the permanent magnet and the magnetic induction switch detection probe is 50±2mm, and the magnetic induction intensity detection threshold is 80mT±5mT.

[0024] The beneficial effects of this utility model embodiment are:

[0025] 1. By employing redundant magnetic induction probes and PLC dynamic threshold adjustment in synergy, the false operation rate is reduced from 12% of traditional mechanical switches to below 0.5%.

[0026] 2. Double-shielded cables, combined with metal corrugated pipes, reduce signal anomalies caused by electromagnetic interference from 8 times per shift to 0.1 times per shift;

[0027] 3. The three-layer coating process of permanent magnets ensures that the magnetic flux attenuation rate is less than 5% over 20 years, which is 6 times better than the 3% annual attenuation of ordinary magnets. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the automatic loading and unloading position control and detection device according to an embodiment of the present utility model;

[0030] Figure 2 This is an enlarged schematic diagram of position A of the automatic loading and unloading position control and detection device according to an embodiment of the present utility model;

[0031] Icons: 001 hoisting rod for transporting hoppers; 110 permanent magnet assembly; 111 magnet mounting base; 112 permanent magnet; 120 magnetic induction switch detection device; 121 switch detection probe; 122 aviation plug; 123 double-shielded cable; 124 metal corrugated flexible hose; 130 insulating mounting base; 131 insulating hoisting rod; 132 insulating assembly base. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] First Embodiment

[0039] Please see Figure 1-2This embodiment provides an automatic loading and unloading position control and detection device for freight cableway hoppers, including a permanent magnet assembly 110 and a magnetic induction switch detection device 120 installed at the loading and unloading station. Existing automatic loading and unloading position control and detection devices for freight cableways use mechanical limit switches. Mechanical limit switches have a short lifespan, are prone to signal malfunctions, require frequent replacement, and are difficult to maintain, severely impacting cableway transport capacity. The automatic loading and unloading position control and detection device for freight cableways in this embodiment uses a magnetic induction switch for position control. Magnetic induction switches have a long lifespan, provide accurate and reliable signals, and are easier to maintain and replace.

[0040] The permanent magnet assembly 110 includes a magnet mounting base 111 on the hoisting rod 001 of the transport hopper. The magnet mounting base 111 has a snap-fit ​​structure; the specific snap-fit ​​structure in this embodiment is not limited, as long as it can fix the permanent magnet 112 onto the magnet mounting base 111. The permanent magnet is directly inserted into the magnet mounting base 111 with the snap-fit ​​structure and IP67 protected encapsulation is provided. Epoxy resin sealant is filled into the gaps of the magnet mounting base 111 to resist dust, moisture, and acid / alkali corrosion.

[0041] Specifically, the permanent magnet 112 uses N52 grade sintered NdFeB magnets with a nickel-copper-nickel three-layer composite plating. The installation distance between the permanent magnet 112 and the magnetic induction switch detection probe is 50±2mm, and a 50±2mm air gap is maintained between them to ensure detection intensity. The magnetic induction intensity detection threshold is 80mT±5mT. The magnetic flux retention rate is <5% over 20 years. It is fixed to the hopper lifting rod by a snap-on mounting bracket, making maintenance and replacement easy and ensuring assembly efficiency.

[0042] The magnetic induction switch detection device 120 includes at least two magnetic induction switch detection probes 121 corresponding to the position of the permanent magnet 112, an aviation plug 122 connected in sequence to the detection probes, a double-shielded cable 123, a PLC control system, a metal corrugated flexible tube 124 disposed outside the double-shielded cable 123, and an insulating mounting base 130 for assembling the detection probes, etc.

[0043] The insulating mounting base 130 includes an insulating rod 131 and an insulating assembly base 132. The top of the insulating rod 131 is connected to the loading and unloading station, the middle extends horizontally towards the conveying hopper rod 001, and the bottom is provided with a vertical assembly plate. The insulating assembly base 132 is fixed in the assembly space formed by the middle extension plate of the insulating rod 131 and the assembly plate.

[0044] Specifically, the insulating mounting base 132 is made of polytetrafluoroethylene (PTFE). The mounting surface of the insulating mounting base 132 has an anti-slip toothed structure, and both ends have M8 standard mounting holes to fix the insulating mounting base 132 onto the insulating rod 131. The detection probe and aviation plug 122 are mounted on the insulating mounting base 132. The insulating mounting base 130 has an axial fine-tuning groove, and the detection probe is fixed to the mounting base by a double-nut locking structure; the double nuts are anti-loosening nylon nuts.

[0045] The detection probe is connected to the PLC control system via a double-shielded cable 123. An aviation plug 122 is provided at the connection between the detection probe and the cable. The detection probe is mounted on an insulating mounting base 130 with a double nut fixing structure.

[0046] In this embodiment, two magnetic induction switch detection probes 121 are used as detection devices. When the probes detect the magnetic field signal of the permanent magnet 112 fixed on the boom, they immediately issue a signal indicating that the hopper has reached its position, stopping the trolley mechanism and accurately stopping the hopper at the loading or unloading station. Specifically, two industrial-grade magnetic induction switches (model OMRON E2E-X10MY1) are arranged vertically with dual redundancy, a probe spacing of 50mm, and a detection threshold set to 80mT ± 5mT. In other embodiments, three or four magnetic induction switch detection probes 121 can be used, reducing false detections but increasing device cost.

[0047] The magnetic induction switch detection probe 121 adopts a redundant configuration, with multiple detection probes arranged at intervals in the vertical direction of the insulating mounting base 130 to form a multi-channel signal detection structure.

[0048] The double-shielded cable 123 is covered by a corrugated metal flexible tube 124, which contains a cable shielding layer. The cable shielding layer adopts a composite shielding structure of copper mesh braid and aluminum foil. The aviation plug 122 is an M12 aviation connector to ensure quick and effective connection. The plug part is filled with epoxy resin sealant.

[0049] Two detection probes are vertically mounted on the insulating mounting base 130. The PLC directly detects the probe signals to realize logical judgment. The PLC dynamically adjusts the threshold internally to filter out false triggers caused by instantaneous magnetic field fluctuations. Double-shielded cables 123 are used to transmit signals, and the external metal corrugated pipe is grounded to suppress electromagnetic interference (such as interference from motors and frequency converters). The detection probe cables and detection head body use M12 aviation plugs 122 to replace traditional terminal blocks, enabling hot-swappable replacement of the probes within 5 seconds. The detection probes and insulating mounting base 130 are fixed with double nuts, supporting tool-free fine adjustment and short maintenance time. The magnetic induction probe is a wide-temperature range magnetic induction probe, using an industrial-grade magnetic induction switch (operating temperature -40℃~85℃), and is equipped with a heat dissipation / insulation shell to adapt to high and low temperature environments. The probes and permanent magnets are encapsulated with IP67 or higher protection level and filled with epoxy resin sealant to resist dust, moisture and acid and alkali corrosion.

[0050] The magnetic induction switch detection probe 121 is equipped with a composite protective shell, which includes an aluminum alloy heat dissipation substrate and a polycarbonate heat insulation cover. The probe's operating temperature range is -40℃ to 85℃, further protecting the probe.

[0051] This specification describes examples of embodiments of the present invention, but does not imply that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in various alternative forms. The drawings are not necessarily drawn to scale; some features may be enlarged or reduced to show details of specific components. The specific structural and functional details disclosed should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to implement the present invention in various forms. Those skilled in the art will understand that multiple features illustrated and described with reference to any of the drawings can be combined with features illustrated in one or more other drawings to form embodiments not explicitly illustrated or described. The illustrated combinations of features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention may be used as needed for specific applications or implementations.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic loading and unloading position control and detection device for a freight cableway hopper, characterized in that: It includes a permanent magnet mounted on the boom of the transport hopper and a magnetic induction switch detection device installed at the loading and unloading station; the magnetic induction switch detection device includes at least two magnetic induction switch detection probes corresponding to the permanent magnet, the detection probes are connected to the PLC control system through a double-shielded cable, the connection between the detection probe and the cable is provided with an aviation plug, and the detection probes are mounted on an insulating mounting base with a double nut fixing structure.

2. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 1, characterized in that, The magnetic induction switch detection probe is redundantly configured, with multiple detection probes arranged at intervals in the vertical direction of the insulating mounting base to form a multi-channel signal detection structure.

3. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 1, characterized in that, The insulating mounting base is provided with an axial fine-tuning groove, and the detection probe is fixed on the mounting base by a double nut locking structure. The double nuts are anti-loosening nylon nuts.

4. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 1, characterized in that, The permanent magnet is an N52 grade sintered neodymium iron boron magnet with a nickel-copper-nickel three-layer composite coating on its surface. The magnet is directly inserted into the magnet mounting base with a snap-fit ​​structure, and the gap in the magnet mounting base is filled with epoxy resin sealant.

5. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 1, characterized in that, The outer layer of the double-shielded cable is fitted with a corrugated metal hose, and the cable shielding layer is installed inside the corrugated metal hose. The cable shielding layer adopts a composite shielding structure of copper mesh braiding layer and aluminum foil layer.

6. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 1, characterized in that, The aviation plug is an M12 aviation connector, and the insertion part is filled with epoxy resin sealant.

7. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 1, characterized in that, The magnetic induction switch detection probe is equipped with a composite protective shell, which includes an aluminum alloy heat dissipation substrate and a polycarbonate insulation cover.

8. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 1, characterized in that, The insulating mounting base includes an insulating rod and an insulating assembly base. The top of the insulating rod is connected to the loading and unloading station, the middle part extends horizontally towards the hoisting rod of the transport hopper, and the bottom is provided with a vertical assembly plate. The insulating assembly base is fixed in the assembly space formed by the middle extension plate of the insulating rod and the assembly plate.

9. The automatic loading and unloading position control and detection device for freight cableway hoppers according to claim 8, characterized in that, The insulating mounting base is made of polytetrafluoroethylene. The mounting surface of the insulating mounting base has an anti-slip toothed structure, and both ends have M8 standard mounting holes to fix the insulating mounting base to the insulating rod.

10. The automatic loading and unloading position control and detection device for freight cableway hoppers according to any one of claims 1-9, characterized in that, The installation distance between the permanent magnet and the magnetic induction switch detection probe is 50±2mm, and the magnetic induction intensity detection threshold is 80mT±5mT.

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