Intelligent portable fixed anti-falling device for transformer

Abstract

The invention discloses an intelligent portable fixed type anti-falling device for a transformer, and relates to the technical field of transformers, the intelligent portable fixed type anti-falling device for the transformer comprises a transformer body, a locking assembly and an early warning protection assembly, and the lower surface of the transformer body is symmetrically connected with a plurality of fixing supports. A passive buffering system is formed by a limiting plate and magnetorheological fluid, energy is dissipated and connection fatigue is reduced in daily vibration, when the risk of falling occurs, a strain gauge senses deformation, an electromagnetic coil is instantly activated after intelligent judgment of a control module, and the fault point can be accurately positioned. The magnetorheological fluid is solidified to form rigid support, falling is effectively intercepted, automatic reset is achieved after the risk is relieved, installation verification, vibration suppression, active falling prevention and self-recovery are integrated, and the intrinsic safety and reliability of high-altitude transformer operation are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and more specifically, to an intelligent, lightweight, fixed anti-fall device for transformers. Background Technology

[0002] In the construction and operation and maintenance of power systems, transformers, as key transmission and transformation equipment, frequently involve high-altitude hoisting and fixing operations during installation, replacement, and maintenance. Especially in outdoor power distribution scenarios, transformers are often hoisted onto utility poles or platforms, relying on load-bearing structures such as steel cables, hooks, and supports for positioning and support. However, due to factors such as material fatigue, corrosion, overload, installation errors, long-term vibration, or extreme weather, risks such as cable breakage, support deformation, loose bolts, or connector failure always exist. Once these occur, the entire transformer may fall, causing not only damage to expensive equipment and power outages, but also endangering the safety of maintenance personnel or the public below, and even causing fires or environmental damage due to tank rupture. Pollution can lead to partial grid paralysis and significant socio-economic losses. Therefore, building a reliable, proactive, and self-testable fall protection mechanism at the transformer level has become an important issue in ensuring the inherent safety of power facilities. With the in-depth promotion of smart grids, digital twins, and condition-based maintenance concepts, the industry has put forward an urgent need for integrated fall protection devices that combine structural reliability, timely response, environmental adaptability, and ease of installation. In particular, it emphasizes the integrated design that achieves protection upon leaving the factory, reliability upon installation, perceptible operation, and intervention of risks without significantly increasing the weight, volume, and structural complexity of the equipment. This transforms the fall protection function from an additional measure into an inherent safety attribute of the transformer support system.

[0003] Chinese Patent Publication No. CN111640557B discloses a transformer heat dissipation and anti-fall device, including a transformer shell, a heat sink shell, and a utility pole. The transformer is fixedly connected inside the transformer shell, and a load-bearing rod is screwed to the bottom of the transformer shell. Both sides of the load-bearing rod are screwed to the utility pole. The transformer is filled with insulating oil. Collars are fixedly connected to both sides of the top of the transformer shell, and connecting ropes are fixedly connected to the surface of the collars. This transformer heat dissipation and anti-fall device enhances heat dissipation through heat sinks, insulating oil, and a cooling fan. Heat dissipation windows are provided on both sides of the heat sink shell, and the cooling fan creates a figure-eight-shaped airflow circulation around the heat sink, thereby solving the problem of insufficient heat dissipation.

[0004] In practical applications, existing transformer fall protection measures generally rely on manual inspections, which are prone to delays and subjective errors. This makes it difficult to detect potential problems such as loose bolts in a timely manner. Furthermore, they lack effective buffering against daily wind vibrations and dynamic loads, which can accelerate the fatigue failure of connecting parts. In addition, traditional fall protection devices are mostly rigid chain or support plate structures, which can only passively support the transformer after a fall has occurred, and cannot provide early warning or active intervention. Therefore, in order to address the above technical problems, it is necessary to provide an intelligent, lightweight, fixed fall protection device for transformers. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent, lightweight, fixed anti-fall device for transformers to solve the above-mentioned problems.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0007] A smart, lightweight, fixed fall arrestor for transformers includes a transformer body, a locking assembly, and a warning and protection assembly. Multiple fixed supports are symmetrically connected to the lower surface of the transformer body. An upper fixing rod is mounted on the lower surface of the transformer body, and a lower fixing rod is mounted on the lower surface of the upper fixing rod. Both ends of the upper and lower fixing rods are fixedly connected to fixing clamps. The locking assembly includes mounting holes formed on the fixed supports and the upper fixing rod. A locking bolt is inserted into the inner cavity of the mounting hole. A fixing washer is fitted onto the outer surface of the locking bolt. Fixed conductive contacts are symmetrically fixedly connected to the outer surface of the fixing washer. A movable washer is fitted onto the outer surface of the locking bolt. The movable pad has elastic plates symmetrically fixedly connected to its outer surface. One end of each elastic plate is fixedly connected to a movable guide contact. The locking bolt has a locking sleeve threadedly connected to its outer surface. The warning and protection assembly includes a warning rod fixedly connected to the upper surface of the lower fixed rod. A strain gauge sensor is fixedly connected to the upper surface of the warning rod. The inner cavity of the warning rod is filled with magnetorheological fluid. Electromagnetic coils are embedded and fixed at both ends of the inner cavity of the warning rod. Buffer rods are inserted through both ends of the warning rod. A piston is fixedly connected to one end of each buffer rod. A hinge rod is fixedly connected to the lower surface of the upper fixed rod. The hinge rod is hinged to a limit plate. Push rods are symmetrically fixedly connected to both sides of the lower end of the limit plate.

[0008] As a further improvement of the present invention, the lower surface of the transformer body abuts against the upper surface of the upper fixing rod, the side of the fixing bracket abuts against the side of the upper fixing rod, the fixing gasket is fixedly connected to the side of the upper fixing rod, the fixing clamp is semi-circular, and two adjacent fixing clamps are spliced ​​together to form a circle and fixedly connected by bolts and threaded sleeves.

[0009] As a further improvement of the present invention, multiple limiting sleeves are uniformly fixedly connected to the side of the upper fixing rod, and the movable guide contact moves within the cavity of the limiting sleeve.

[0010] As a further improvement of the present invention, a sliding groove is provided on the limiting sleeve, and a sliding block is fixedly connected to the outer surface of the moving guide contact, and the sliding block moves in the inner cavity of the sliding groove.

[0011] As a further improvement of the present invention, the fixed bracket and the upper fixed rod are fixedly connected by locking bolts and locking sleeves, and multiple warning lights are evenly fixedly connected to the lower surface of the upper fixed rod.

[0012] As a further improvement of the present invention, the warning lights are electrically connected to the movable conductive contact and the fixed conductive contact respectively, and the number of the warning lights is the same as that of the locking bolts and they are installed below the corresponding locking bolts.

[0013] As a further improvement of the present invention, the middle part of the warning rod is arc-shaped, and the piston moves in the inner cavity of the warning rod.

[0014] As a further improvement of the present invention, the upper surface of the strain gauge sensor abuts against the lower surface of the upper fixed rod, and the piston moves within the cavity of the warning rod.

[0015] As a further improvement of the present invention, a torsion spring is installed at the hinge joint between the hinge rod and the limiting plate, and the upper end of the limiting plate abuts against both sides of the transformer body.

[0016] As a further improvement of the present invention, a push plate is fixedly connected to one end of the buffer rod, and the outer surface of the push rod abuts against the side of the push plate.

[0017] Compared with the prior art, the advantages of this invention are:

[0018] (1) This solution uses the pre-tightening force of the locking bolt to directly drive the deformation of the elastic plate and control the on and off of the conductive contact, so that the state of the warning light corresponds strictly with the state of the bolt tightness. When tightened, the power is cut off and the light is turned off; when loosened, the power is turned on and the light is turned on. This mechanism does not require continuous external power supply, does not rely on wireless communication or complex algorithms, and achieves verification upon installation and alarm upon loosening only through a pure physical structure, which significantly improves the reliability of the connection. At the same time, each bolt position is independently equipped with a warning light to achieve accurate fault location, which fundamentally solves the industry problem that it is difficult to detect the loosening of bolts after transformer installation, and significantly improves the long-term operational reliability of the connection parts of high-altitude equipment.

[0019] (2) Under the compliant micro-amplitude vibration caused by wind load, electromagnetic force or load fluctuation, the transformer sidewall pushes the limit plate to rotate inward around the hinge rod, which drives the push rod to drive the piston to compress the magnetorheological fluid in the warning rod. Since the electromagnetic coil is not energized at this time, the magnetorheological fluid is in a low viscosity liquid state, which provides moderate damping to dissipate vibration energy, thereby reducing the fatigue damage of high frequency impact to bolted connections. This passive buffer mechanism has a simple structure, is maintenance-free, and has strong weather resistance. It is suitable for complex outdoor environments and realizes active suppression of the daily operation vibration of the transformer, which significantly improves the operating stability of the transformer under dynamic load.

[0020] (3) When the transformer tends to fall due to support failure or connection damage, the upper fixed rod will transmit the pressure to the warning rod. Its arc-shaped structure will deform, which will be captured by the strain gauge in real time and converted into an electrical signal. The control module will combine the deformation and the rate of change to make intelligent judgment. After eliminating instantaneous interference, the electromagnetic coil will be activated quickly, so that the magnetorheological fluid will solidify within milliseconds to form a rigid support force, preventing the fall process in the initial stage. After the risk is eliminated, the system can cut off the power supply through remote command or local button. The magnetorheological fluid will restore its fluidity, and the warning rod will automatically reset by its own elasticity. There is no need to disassemble or replace parts, which provides intrinsically safe fall protection for transformers installed at high altitudes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a bottom-view schematic diagram of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram showing the overall structure of the present invention broken down;

[0024] Figure 4 This is a partial structural diagram of the present invention;

[0025] Figure 5 This is a schematic diagram of the locking assembly structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the locking assembly structure in the locking state of the present invention;

[0027] Figure 7 This is a schematic diagram showing the disassembled structure of the locking assembly of the present invention;

[0028] Figure 8 This is a schematic diagram showing the structural breakdown of the early warning and protection component of the present invention;

[0029] Figure 9 This is a schematic diagram of the early warning rod structure of the present invention;

[0030] Figure 10This is a cross-sectional schematic diagram of the warning rod structure of the present invention.

[0031] Explanation of the labels in the diagram:

[0032] 1. Transformer body; 101. Fixed bracket; 2. Upper fixed rod; 3. Lower fixed rod; 4. Fixed clamping ring; 5. Bolt; 6. Screw sleeve; 7. Locking assembly; 701. Mounting hole; 702. Locking bolt; 703. Fixed washer; 704. Fixed conductive contact; 705. Moving washer; 706. Elastic sheet; 707. Moving conductive contact; 708. Locking screw sleeve; 709. Limiting sleeve; 710. Sliding groove; 711. Sliding block; 712. Warning light; 8. Early warning and protection assembly; 801. Strain gauge sensor; 802. Piston; 803. Buffer rod; 804. Push plate; 805. Hinge rod; 806. Limiting plate; 807. Push rod; 808. Early warning rod; 809. Electromagnetic coil. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] Please see Figures 1-4 The transformer uses an intelligent and lightweight fixed anti-fall device, which includes a transformer body 1. Multiple fixed brackets 101 are symmetrically connected to the lower surface of the transformer body 1. An upper fixed rod 2 is installed on the lower surface of the transformer body 1, and a lower fixed rod 3 is installed on the lower surface of the upper fixed rod 2. Fixed clamping rings 4 are fixedly connected to both ends of the upper fixed rod 2 and the lower fixed rod 3.

[0036] Specifically, the lower surface of the transformer body 1 abuts against the upper surface of the upper fixing rod 2, the side of the fixing bracket 101 abuts against the side of the upper fixing rod 2, the fixing gasket 703 is fixedly connected to the side of the upper fixing rod 2, the fixing clamping ring 4 is semi-circular, and two adjacent fixing clamping rings 4 are spliced ​​together to form a circle and are fixedly connected by bolts 5 and threaded sleeves 6.

[0037] Furthermore, the upper fixed rod 2 and the lower fixed rod 3 are respectively connected to the outer diameter of the utility pole or support column through fixed clamping rings 4. After the two adjacent clamping rings 4 are spliced ​​together, they are fastened by bolts 5 and threaded sleeves 6 to achieve a reliable installation of the entire device on the pole. The lower fixed rod 3 is set parallel to the lower part of the upper fixed rod 2, and ensures that the strain gauge sensor 801 on the upper surface of the warning rod 808 abuts against the lower surface of the upper fixed rod 2 to form a reliable force transmission interface and ensure accurate perception of deformation signals.

[0038] The upper fixing rod 2 is horizontally positioned directly below the transformer body 1, with its upper surface in contact with the bottom surface of the transformer body 1 and its side abutting against the fixing bracket 101, forming a stable force transmission path. The fixing bracket 101 is symmetrically welded or bolted to both sides of the bottom of the transformer body 1 to transmit the load to the upper fixing rod 2. The transformer body 1 is located between two limiting plates 806. The limiting plates 806 ensure that the installation position of the transformer body 1 will not shift, and at the same time provide a mechanical sensing basis for subsequent displacement.

[0039] The transformer body 1 serves as the protected object and core load-bearing component of the device. The fixed bracket 101 pre-installed on its lower surface provides an installation reference for the device. The fixed bracket 101 is forged from low-alloy high-strength steel and is fixed to the base of the transformer body 1 by welding. It has excellent load-bearing strength and fatigue resistance. The upper fixed rod 2 and the lower fixed rod 3 together form the support frame of the device. Both are made of aluminum alloy profiles and are processed by extrusion molding, which has both lightweight and high strength characteristics. The fixing clamp 4 is made of 304 stainless steel sheet and is stamped. It has good rust resistance and toughness. Each fixing clamp 4 has a semi-circular structure with an anti-slip rubber pad attached to the inner surface. Two adjacent clamps are spliced ​​together to form a complete circle. It is fixedly connected to the support component by the cooperation of bolts 5 and threaded sleeves 6.

[0040] Example 2:

[0041] Please see Figures 1-7 A smart, lightweight, fixed anti-fall device for transformers includes a locking assembly 7, comprising mounting holes 701 formed on a fixed bracket 101 and an upper fixed rod 2. A locking bolt 702 is inserted into the inner cavity of the mounting hole 701. A fixing washer 703 is fitted on the outer surface of the locking bolt 702. Fixed conductive contacts 704 are symmetrically fixedly connected to the outer surface of the fixing washer 703. A movable washer 705 is fitted on the outer surface of the locking bolt 702. Elastic plates 706 are symmetrically fixedly connected to the outer surface of the movable washer 705. A movable conductive contact 707 is fixedly connected to one end of the elastic plate 706. A locking nut 708 is threadedly connected to the outer surface of the locking bolt 702.

[0042] Specifically, multiple limiting sleeves 709 are evenly fixedly connected to the side of the upper fixed rod 2. The movable guide point 707 moves within the cavity of the limiting sleeve 709. A sliding groove 710 is provided on the limiting sleeve 709. A sliding block 711 is fixedly connected to the outer surface of the movable guide point 707. The sliding block 711 moves within the cavity of the sliding groove 710. The fixed bracket 101 and the upper fixed rod 2 are fixedly connected by locking bolts 702 and locking sleeves 708. Multiple warning lights 712 are evenly fixedly connected to the lower surface of the upper fixed rod 2. The warning lights 712 are electrically connected to the movable guide point 707 and the fixed conductive contact 704 respectively. The number of warning lights 712 is the same as that of the locking bolts 702 and they are installed below the corresponding locking bolts 702.

[0043] Furthermore, the upper fixing rod 2 is aligned with the mounting hole 701 of the fixing bracket 101. The worker inserts the locking bolt 702 into the mounting hole 701. At this time, the moving washer 705 and the fixing washer 703 are fitted onto the outer surface of the locking bolt 702. Then, the locking sleeving 708 is screwed in to complete the tightening. The preload of the locking bolt 702 presses the fixing washer 703 downwards, pushing the elastic piece 706 to bend, causing the moving conductive contact 707 to separate from the fixed conductive contact 704. At this time, the circuit of the warning light 712 is disconnected, and the light does not light up, indicating that the installation is secure and the locking sleeving 708 is in the locked state.

[0044] When the locking bolt 702 becomes loose due to vibration, corrosion, or other factors during the operation of the transformer body 1, the preload of the locking bolt 702 decreases. The elastic plate 706 rebounds upward under its own elastic force, causing the movable guide contact 707 to move along the inner cavity of the limiting sleeve 709. The sliding block 711 moves synchronously along the sliding groove 710 to ensure accurate movement of the guide contact. When the movable guide contact 707 contacts the fixed conductive contact 704, the circuit of the warning light 712 is connected, and the corresponding red warning light 712 lights up, providing feedback to the maintenance personnel on the loosening status of the bolts. This achieves accurate positioning and timely warning. After the maintenance personnel discover that the warning light 712 is lit, they retighten the loose locking bolt 702. The bolt preload increases, pushing the movable guide contact 707 to separate from the fixed conductive contact 704. The warning light 712 goes out, and the device resets.

[0045] Each warning light 712 is electrically connected at one end to the corresponding fixed conductive contact 704 and at the other end to the movable conductive contact 707. All warning lights 712 share the same low-voltage DC power supply. The negative terminal is grounded through the metal body of the upper fixed rod 2 to form a circuit. When the locking screw 708 is tightened in place, the movable washer 705 is pressed down, and the elastic plate 706 drives the movable conductive contact 707 to disengage from the fixed conductive contact 704, the circuit is broken, and the warning light 712 is turned off. When the bolt is loosened, the elastic plate 706 rebounds, the movable conductive contact 707 contacts the fixed conductive contact 704, the circuit is closed, and the corresponding warning light 712 lights up. The entire circuit adopts a low-voltage design, which complies with the power site safety specifications and avoids the introduction of high-risk electrical interfaces.

[0046] Mounting hole 701 is opened at the corresponding position of fixed bracket 101 and upper fixed rod 2, and precisely matches the locking bolt 702. The locking bolt 702 is made of high-strength alloy structural steel bolt to ensure sufficient preload for the connection. The bolt head adopts a hexagonal head design for easy wrench operation. The outer surface of the rod is galvanized to enhance rust prevention. The locking sleeving 708 is made of high-strength nylon material, and its internal thread matches the locking bolt 702. Its elastic characteristics can compensate for the slight loosening of the bolt caused by vibration, while avoiding the bite damage when the metal sleeving and bolt are engaged.

[0047] The fixing washer 703 is made of brass with a tin-plated surface to reduce contact resistance. It is fixed to the side of the upper fixing rod 2 by welding and is coaxially set with the mounting hole 701 to ensure the accurate positioning of the fixed conductive contact 704. The moving washer 705 is made of spring steel and has a certain degree of elasticity. It is sleeved on the rod of the locking bolt 702 and can move axially along the rod as the bolt is tightened or loosened. The elastic sheet 706 on its outer surface provides the reset force. Both the fixed conductive contact 704 and the moving conductive contact 707 are core conductive components.

[0048] The limiting sleeve 709 is made of engineering plastic and is fixed to the side of the upper fixing rod 2 by injection molding. Its inner cavity size is adapted to the moving guide contact 707 to provide guidance for the movement of the guide contact. The sliding groove 710 cooperates with the sliding block 711. The sliding block 711 is welded to the outer surface of the moving guide contact 707 and can move axially along the sliding groove 710, which not only limits the radial displacement of the guide contact, but also avoids accidental disconnection of the circuit connection.

[0049] The warning light 712 is made of red LED beads, which is small in size and low in power consumption. It is fixedly installed in the preset slot on the lower surface of the upper fixing rod 2. Each warning light 712 corresponds to a set of locking bolts 702 to achieve precise feedback. Its lamp cover is made of polycarbonate material, which has impact resistance and UV protection performance and is suitable for harsh outdoor environments.

[0050] Example 3:

[0051] Please see Figures 1-8 A smart, lightweight, fixed fall arrestor for transformers includes a warning and protection component 8, comprising a warning rod 808 fixedly connected to the upper surface of the lower fixed rod 3, a strain gauge sensor 801 fixedly connected to the upper surface of the warning rod 808, a magnetorheological fluid filling the inner cavity of the warning rod 808, electromagnetic coils 809 embedded and fixed at both ends of the inner cavity of the warning rod 808, buffer rods 803 inserted at both ends of the warning rod 808, a piston 802 fixedly connected to one end of the buffer rod 803, a hinge rod 805 fixedly connected to the lower surface of the upper fixed rod 2, a limit plate 806 hinged to the hinge rod 805, and push rods 807 symmetrically fixedly connected to both sides of the lower end of the limit plate 806.

[0052] Specifically, the warning rod 808 is arc-shaped in the middle, the piston 802 moves in the inner cavity of the warning rod 808, the upper surface of the strain gauge sensor 801 abuts against the lower surface of the upper fixed rod 2, the piston 802 moves in the inner cavity of the warning rod 808, a torsion spring is installed at the hinge gap between the hinge rod 805 and the limiting plate 806, the upper end of the limiting plate 806 abuts against both sides of the transformer body 1, one end of the buffer rod 803 is fixedly connected to the push plate 804, and the outer surface of the push rod 807 abuts against the side of the push plate 804.

[0053] Furthermore, under the action of the torsion spring, the upper end of the limiting plate 806 always abuts against both sides of the transformer body 1, maintaining a vertical state. The push rod 807 makes slight contact with the side of the push plate 804, the piston 802 is in the inner cavity of the warning rod 808, the magnetorheological fluid is in a liquid state, the electromagnetic coil 809 is not energized, and if the transformer body 1 vibrates within the normal range under the action of wind load or unbalanced load, it will press the limiting plates 806 on both sides, causing them to rotate inward around the hinge rod 805. The push rod 807 at the lower end of the limiting plate 806 will then push the push plate 804, thereby driving the buffer rod 803 and the piston 802 to compress the magnetorheological fluid in the warning rod 808, realizing the energy dissipation of daily vibration. This hydraulic buffer mechanism effectively suppresses high-frequency micro-amplitude vibration, reduces the probability of bolt loosening, and extends the overall structural life.

[0054] When the transformer body 1 begins to fall due to reasons such as failure of the support structure, its own weight is transferred to the upper fixed rod 2 through the fixed bracket 101. The upper fixed rod 2 then transmits the pressure to the warning rod 808 and the strain gauge sensor 801. Under the pressure, the arc-shaped structure of the middle section of the warning rod 808 deforms. The strain gauge sensor 801 senses the deformation signal and converts it into an electrical signal, which is transmitted to the control module. After receiving the signal from the strain gauge sensor 801, the control module makes a comprehensive judgment based on the preset threshold and the rate of change, eliminating instantaneous impact interference. It only determines the risk of falling when a continuous downward trend is confirmed, and immediately outputs a driving current to the electromagnetic coil 809. The electromagnetic coil 809 generates a magnetic field when energized, and the magnetorheological fluid instantly solidifies under the action of the magnetic field, forming a rigid support structure that prevents the transformer body 1 from falling continuously. This can effectively intercept the fall in its early stages.

[0055] After the risk of transformer falling is eliminated, the power supply to the electromagnetic coil 809 is cut off by manually resetting the control module or by remote control command. The magnetic field disappears, the magnetorheological fluid returns to a liquid state, the warning rod 808 resets on its own elasticity, and the system returns to its initial state. The strain gauge sensor 801, electromagnetic coil 809 and control unit are powered by independent small lithium batteries. The control unit uses a low-power MCU, which is normally in sleep mode and is only activated when the strain gauge sensor 801 is triggered.

[0056] The warning pole 808, as the core load-bearing and functional carrier of the component, is made of seamless alloy steel tube. The middle section has a pre-designed arc structure to improve the buffer performance by utilizing the arc deformation characteristics. The inner cavity of the pole is precision bored to ensure smooth movement of the piston 802. The parts at both ends that are inlaid and fixed with electromagnetic coils 809 are treated with an insulating coating to avoid electromagnetic interference and short circuit risks. The surface of the pole is sprayed with anti-rust paint to enhance outdoor corrosion resistance.

[0057] The strain gauge sensor 801 uses a metal foil strain gauge, which is attached to the middle of the upper surface of the warning rod 808 with a special adhesive and is in close contact with the lower surface of the upper fixed rod 2. The sensitive grid of the strain gauge is made of constantan alloy, which has good temperature stability and can accurately sense the deformation signal of the warning rod 808 and the upper fixed rod 2. Its lead wire is connected to the control module through a waterproof connector to ensure stable signal transmission.

[0058] Magnetorheological fluid fills the inner cavity of the warning rod 808. It uses polydimethyl silicone oil as the base fluid, composite carbonyl iron powder and nano stabilizers. Under normal conditions, it is a low-viscosity liquid, which can solidify instantly when subjected to a magnetic field. The electromagnetic coil 809 is made of enameled copper wire and is embedded in the insulating grooves at both ends of the warning rod 808. After being energized, it generates a ring magnetic field. The direction of the magnetic field matches the filling area of ​​the magnetorheological fluid to ensure uniform magnetic field distribution. The piston 802 is made of aluminum alloy and has a nitrile rubber sealing ring on its outer surface to achieve the dual functions of sealing and buffering. It can move axially in the inner cavity of the warning rod 808 and work with the magnetorheological fluid to complete pressure transmission and buffering. The buffer rod 803 is a solid alloy steel rod. One end is welded and fixed to the piston 802, and the other end is fixedly connected to the push plate 804. Its surface is chrome-plated to enhance wear resistance.

[0059] During normal operation, the warning rod 808 remains naturally convex, the magnetorheological fluid inside is in a liquid state, and the electromagnetic coil 809 is not energized. At this time, the rod only bears a slight weight of the transformer body 1. Once the transformer body 1 falls, its weight will suddenly press on the warning rod 808, causing the warning rod 808 to be pressed downwards and flattened. The strain gauge sensor 801 on the rod immediately detects this and prepares to activate the electromagnetic coil 809. After the electromagnetic coil 809 is energized, it generates a magnetic field, causing the magnetorheological fluid inside the warning rod 808 to harden instantly. At this time, the warning rod 808 is like suddenly turning from soft wood into hard steel, able to withstand the pressure and steadily support the transformer.

[0060] After the staff repaired the fault, they cut off the power to the electromagnetic coil. The magnetic field disappeared, and the magnetorheological fluid returned to a liquid state. The warning rod 808, relying on its own elasticity, slowly returned to its original convex shape and returned to the standby state.

[0061] The push plate 804 is a circular steel plate with a polished surface to increase the contact area with the push rod 807 and ensure uniform force transmission. The push rod 807 is a stainless steel round rod, symmetrically welded to both sides of the lower end of the limit plate 806. Its ends are rounded to avoid mechanical damage when in contact with the push plate 804. The hinge rod 805 is made of alloy steel and is fixed to the lower surface of the upper fixing rod 2 by welding. A torsion spring is installed at the hinge point with the limit plate 806. The torsion spring is made of spring steel to provide continuous restoring force to the limit plate 806, ensuring that the upper end of the limit plate 806 is always in close contact with both sides of the transformer body 1. The limit plate 806 is made of stamped steel plate to ensure strength.

[0062] Working principle: During the use of the device, the upper fixed rod 2 and the lower fixed rod 3 are respectively connected to the outer diameter of the utility pole or support column through the fixed clamping ring 4. After the clamping ring 4 is assembled, it is fastened by the bolt 5 and the sleeving sleeve 6 to achieve a reliable installation of the entire device on the pole. The fixed bracket 101 is symmetrically welded or bolted to both sides of the bottom of the transformer body 1. The transformer body 1 is located between the two limit plates 806. The limit plates 806 ensure that the installation position of the transformer body 1 will not be offset. The operator inserts the locking bolt 702 into the mounting hole 701, and then screws in the locking sleeving sleeve 708 to complete the tightening. The preload of the locking bolt 702 presses the fixing washer 703 downward, pushing the elastic plate 706 to bend, causing the moving conductive contact 707 to separate from the fixed conductive contact 704. At this time, the circuit of the warning light 712 is disconnected, and the light does not light up, indicating that the installation is secure. When the transformer body 1 is in operation, due to vibration and corrosion, the warning light will be turned off. When factors such as these cause the locking bolt 702 to loosen, the preload of the locking bolt 702 decreases, and the elastic plate 706 rebounds upward under its own elastic force, causing the moving guide contact 707 to move along the inner cavity of the limiting sleeve 709. When the moving guide contact 707 contacts the fixed conductive contact 704, the circuit of the warning light 712 is connected, and the red warning light 712 at the corresponding position lights up, providing feedback to the maintenance personnel on the loosening status of the bolts. Under the action of the torsion spring, the upper end of the limiting plate 806 is always in contact with both sides of the transformer body 1. If the transformer body 1 vibrates within the normal range under the action of wind load or unbalanced load, it will press the limiting plates 806 on both sides, causing them to rotate inward around the hinge rod 805. The push rod 807 at the lower end of the limiting plate 806 then pushes the push plate 804, thereby driving the buffer rod 803 and the piston 802 to compress the magnetorheological fluid in the warning rod 808, thus dissipating the energy of daily vibration.

[0063] When the transformer body 1 begins to fall due to reasons such as failure of the support structure, its own weight is transferred to the upper fixed rod 2 through the fixed bracket 101. The upper fixed rod 2 then transmits the pressure to the warning rod 808 and the strain gauge sensor 801. Under the pressure, the arc-shaped structure of the warning rod 808 deforms. The strain gauge sensor 801 senses the deformation signal and outputs a driving current to the electromagnetic coil 809. The electromagnetic coil 809 generates a magnetic field when energized, and the magnetorheological fluid solidifies instantly under the action of the magnetic field, forming a rigid support structure that prevents the transformer body 1 from falling continuously. This can effectively intercept the fall in its early stages.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A smart, lightweight, fixed fall protection device for transformers, characterized in that: include: The transformer body (1) has multiple fixed brackets (101) symmetrically connected on its lower surface. An upper fixed rod (2) is installed on the lower surface of the transformer body (1), and a lower fixed rod (3) is installed on the lower surface of the upper fixed rod (2). Both ends of the upper fixed rod (2) and the lower fixed rod (3) are fixedly connected with fixed clamping rings (4). The locking assembly (7) includes mounting holes (701) formed on the fixed bracket (101) and the upper fixed rod (2). A locking bolt (702) is inserted into the inner cavity of the mounting hole (701). A fixed washer (703) is sleeved on the outer surface of the locking bolt (702). Fixed conductive contacts (704) are symmetrically fixedly connected to the outer surface of the fixed washer (703). A movable washer (705) is sleeved on the outer surface of the locking bolt (702). An elastic sheet (706) is symmetrically fixedly connected to the outer surface of the movable washer (705). A movable conductive contact (707) is fixedly connected to one end of the elastic sheet (706). A locking nut (708) is threadedly connected to the outer surface of the locking bolt (702). The early warning protection component (8) includes an early warning rod (808) fixedly connected to the upper surface of the lower fixed rod (3). A strain gauge sensor (801) is fixedly connected to the upper surface of the early warning rod (808). The inner cavity of the early warning rod (808) is filled with magnetorheological fluid. Electromagnetic coils (809) are embedded and fixed at both ends of the inner cavity of the early warning rod (808). Buffer rods (803) are inserted through both ends of the early warning rod (808). A piston (802) is fixedly connected to one end of the buffer rod (803). A hinge rod (805) is fixedly connected to the lower surface of the upper fixed rod (2). The hinge rod (805) is hinged to a limit plate (806). Push rods (807) are symmetrically fixedly connected to both sides of the lower end of the limit plate (806).

2. The intelligent lightweight fixed fall protection device for transformers according to claim 1, characterized in that: The lower surface of the transformer body (1) abuts against the upper surface of the upper fixing rod (2), the side of the fixing bracket (101) abuts against the side of the upper fixing rod (2), the fixing gasket (703) is fixedly connected to the side of the upper fixing rod (2), the fixing clamp (4) is semi-circular, and two adjacent fixing clamps (4) are spliced ​​together to form a circle and are fixedly connected by bolts (5) and threaded sleeves (6).

3. The intelligent lightweight fixed anti-fall device for transformers according to claim 1, characterized in that: Multiple limiting sleeves (709) are evenly fixedly connected to the side of the upper fixing rod (2), and the moving guide point (707) moves in the inner cavity of the limiting sleeve (709).

4. The intelligent lightweight fixed anti-fall device for transformers according to claim 3, characterized in that: The limiting sleeve (709) has a sliding groove (710), and a sliding block (711) is fixedly connected to the outer surface of the moving guide contact (707). The sliding block (711) moves in the inner cavity of the sliding groove (710).

5. The intelligent lightweight fixed fall protection device for transformers according to claim 1, characterized in that: The fixed bracket (101) and the upper fixed rod (2) are fixedly connected by locking bolts (702) and locking sleeves (708), and multiple warning lights (712) are evenly fixedly connected to the lower surface of the upper fixed rod (2).

6. The intelligent lightweight fixed fall protection device for transformers according to claim 5, characterized in that: The warning lights (712) are electrically connected to the movable conductive contact (707) and the fixed conductive contact (704) respectively. The number of warning lights (712) is the same as that of the locking bolts (702) and they are installed below the corresponding locking bolts (702).

7. The intelligent, lightweight, fixed fall protection device for transformers according to claim 1, characterized in that: The warning rod (808) is arc-shaped in the middle, and the piston (802) moves inside the warning rod (808).

8. The intelligent, lightweight, fixed fall protection device for transformers according to claim 1, characterized in that: The upper surface of the strain gauge sensor (801) abuts against the lower surface of the upper fixed rod (2), and the piston (802) moves within the cavity of the warning rod (808).

9. The intelligent, lightweight, fixed fall protection device for transformers according to claim 1, characterized in that: A torsion spring is installed at the hinge joint between the hinge rod (805) and the limiting plate (806), and the upper end of the limiting plate (806) abuts against both sides of the transformer body (1).

10. The intelligent, lightweight, fixed fall protection device for transformers according to claim 1, characterized in that: One end of the buffer rod (803) is fixedly connected to a push plate (804), and the outer surface of the push rod (807) abuts against the side of the push plate (804).

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