Transformer overload protection device with mechanical self-adaptive adjustment function

Abstract

The invention relates to the technical field of transformer overload protection, in particular to a transformer overload protection device with a mechanical self-adaptive adjustment function. The transformer overload protection device with the mechanical self-adaptive adjustment function comprises a supporting frame, a transformer, an installation frame, a drop-out fuse, a sliding rail, a lifting frame, a supporting block, a closing piece, a spring, a control assembly and a self-adaptive adjustment assembly, the transformer is installed on the lower side of the supporting frame, and the installation frame is connected to the upper side of the supporting frame. Through the preset height difference of the closing piece and the linkage design of the control assembly, the standard closing sequence of a windward side, a leeward side and a middle phase is achieved, the interphase short circuit risk caused by manual operation errors is avoided, the safety of electric power operation is remarkably improved, meanwhile, the self-adaptive adjusting assembly automatically adjusts the height of the closing piece according to the wind direction, and the safety of electric power operation is improved. The closing time sequence is further optimized, and the harm of the arc to equipment and operators is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer overload protection, and in particular to a transformer overload protection device with mechanical adaptive adjustment. Background Art

[0002] In power systems, transformers are key equipment for power transmission and distribution, and the performance of their overload protection devices directly impacts the safety and stability of power supply. Traditional drop-out fuses, commonly used as transformer overload protection devices, offer advantages such as simple structure and low cost, but they have numerous limitations in practical applications.

[0003] At present, the closing operation of existing drop-out fuses mostly relies on manual labor and lacks automation and intelligent control. When performing closing operations, operators must strictly follow the order of "upwind side first, downwind side second, and finally the middle phase" to reduce arc hazards. However, manual operations are easily affected by environmental and human factors, and there is a risk of operational errors, which may lead to faults such as phase-to-phase short circuits, endangering equipment safety and personnel lives. In addition, under complex and changeable outdoor environmental conditions, wind direction has a significant impact on the movement and diffusion of arcs during the fuse closing process. Under strong winds, the arc may be blown to the adjacent phase conductors, increasing the probability of phase-to-phase short circuits. Existing protection devices cannot dynamically adjust the closing strategy according to changes in wind direction, and are difficult to adapt to complex outdoor operating environments.

[0004] The advancement of smart grid construction is placing higher demands on the automation and intelligence of power equipment. Traditional fixed-mode overload protection devices are no longer able to meet the safety, efficiency, and intelligence demands of modern power systems. There is an urgent need to develop a transformer overload protection device that can adaptively adjust to environmental factors (such as wind direction) to improve the safety and accuracy of closing operations, enhance the device's adaptability in complex environments, and ensure stable power system operation. Summary of the Invention

[0005] In order to overcome the shortcomings mentioned in the background art, the present invention provides a transformer overload protection device with mechanical adaptive adjustment.

[0006] The technical solution of the present invention is: a transformer overload protection device with mechanical adaptive adjustment, including a support frame, a transformer, a mounting frame, a drop-out fuse, a slide rail, a lifting frame, a support block, a closing member, a spring, a control component and an adaptive adjustment component. The transformer is installed on the lower side of the support frame, and the mounting frame is connected to the upper side of the support frame. Three drop-out fuses are installed on the mounting frame at intervals, the lower end of each drop-out fuse is electrically connected to the incoming end of the high-voltage side winding of the transformer through a high-voltage insulated wire, and the upper end of the drop-out fuse is connected to the high-voltage transmission line through the high-voltage insulated wire. The front side of the upper part of the support frame is symmetrically connected to the slide rails, and the lifting frame is slidably connected between the slide rails. The lifting frame is symmetrically provided with slide grooves, and the two slide grooves are respectively slidably connected to the support blocks. At the same time, a support block is also fixedly connected to the middle of the lifting frame, and each support block is slidably connected to the closing member, and a spring is connected between the closing member and the support block. The support frame is provided with a control component, and the mounting frame is provided with an adaptive adjustment component.

[0007] As a preferred technical solution of the present invention, the drop-out fuse is mainly composed of an insulator, a melting tube, a fuse element and an operating ring, wherein the two ends of the fuse element are fixed to the metal end covers at both ends of the melting tube; the insulator is fixedly installed on the mounting frame and forms a rotating pair connection with the lower end of the melting tube. In the closed state, the upper contact of the melting tube is electrically connected to the high-voltage power supply side wire, and the lower contact is electrically connected to the transformer side wire. The operating ring is arranged at one end of the melting tube.

[0008] As a preferred technical solution of the present invention, the control component includes a support ring, a hinged rod, a connecting rod, a rotating rod, a push-pull rod, a first tension spring and a positioning rod. The support ring is symmetrically connected to the upper side of the support frame, and the rear sides of the support rings are respectively rotatably connected to the hinged rods. A connecting rod is connected between the rear ends of the two hinged rods, and the left and right ends of the connecting rod are respectively rotatably connected to the rotating rods. The push-pull rod is vertically slidably connected to the lower side of the support frame, and the upper end of the push-pull rod is rotatably connected to the two rotating rods. In addition, a first tension spring is connected between the left and right ends of the upper side of the push-pull rod and the corresponding support rings, the left and right ends of the lifting frame are respectively connected to the positioning rods, and the front end of the hinged rod is movably connected to the corresponding positioning rod.

[0009] As a preferred technical solution of the present invention, the adaptive adjustment component includes a support rod, a wind direction blade and a drive component. The middle part of the mounting frame is rotatably connected to the support rod, which extends vertically upward and has its upper end fixedly connected to the wind direction blade. The drive component is provided on the lifting frame.

[0010] As a preferred technical solution of the present invention, the driving assembly includes a support plate, a toothed disc, a spline shaft, a movable rack, a tooth block, a toothed rocker and a second tension spring. The top of the lifting frame is connected to the support plate, and the rear side of the support plate is rotatably connected to the toothed disc. The top of the toothed disc is connected to the spline shaft, and the spline shaft is splined with the support rod. The top of the support plate is slidably connected to the movable rack, and the bottom of the movable rack is connected to the tooth block. The rear side of the lifting frame is rotatably connected to the toothed rocker through a rotating shaft. The toothed rocker swings around the rotating connection point between the rotating shaft and the lifting frame. The toothed part of the toothed rocker can mesh with the tooth block. The second tension spring is connected between the left and right ends of the toothed rocker and the lifting frame. The left and right ends of the toothed rocker are provided with guide grooves, which are respectively movably connected to the support blocks on both sides.

[0011] As a preferred technical solution of the present invention, it also includes a support rod, a guide rod and a polygonal block. The support rod is connected between the front sides of the two support rings, two guide rods are connected to the middle of the support rod, and the polygonal block is connected to the rotating shaft on the toothed rocker. The two guide rods are arranged in parallel and the spacing is adapted to the size of the polygonal block. The outer contour of the polygonal block forms a contact and matching relationship with the two guide rods.

[0012] As a preferred technical solution of the present invention, the left and right side walls of the polygonal vertical block are respectively designed as oblique sections with two different angles.

[0013] As a preferred technical solution of the present invention, it also includes a buffer rubber block, and the buffer rubber blocks are respectively connected to the two sides of the top of the support plate. The positions of the buffer rubber blocks are precisely aligned with the movement trajectory of the moving rack.

[0014] Beneficial effects: 1. By pre-setting the height difference of the closing parts and the linkage design of the control components, the standard closing sequence of "upwind side first, downwind side second, and middle phase last" is achieved, avoiding the risk of phase-to-phase short circuit due to human operational errors and significantly improving the safety of power operations. At the same time, the adaptive adjustment component automatically adjusts the height of the closing parts according to the wind direction, further optimizing the closing sequence and reducing the damage of arc to equipment and operators.

[0015] 2. The combination of drop-out fuses and adaptive adjustment components quickly disconnects the circuit and isolates the fault in the event of transformer overload or short circuit. A clear disconnect gap is created after the fuse element blows, effectively preventing the fault from expanding. Furthermore, timely maintenance and precise closing of the fuse reduce insulation degradation caused by abnormal current surges, extending the service life of the transformer and fuse.

[0016] 3. The self-adjusting component can automatically adjust the closing status according to the wind force, and the control component realizes the synchronous closing operation of the three-phase fuse, reducing manual intervention and reducing the labor intensity of operators. The automated operation process not only improves work efficiency, but also avoids possible errors caused by manual operation and reduces operation and maintenance costs.

[0017] 4. The limit coordination between the polygonal vertical block and the guide rod ensures that the toothless rocker maintains a stable angle during the lifting process, preventing the operating accuracy of the closing part from being affected by angle deviation; the buffer rubber block provides buffering, shock absorption and limit function for the moving rack, preventing mechanical parts from being damaged due to collision, ensuring the smooth operation of the drive assembly, and improving the overall reliability and stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the drop-out fuse, slide rail, lifting frame and other components of the present invention.

[0020] Figure 3 It is a three-dimensional structural diagram of the hinge rod, connecting rod and rotating rod components of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the push-pull rod, the first tension spring, the positioning rod and other components of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the supporting block, closing member, spring and other components of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the support rod, wind direction blades, support plates and other components of the present invention.

[0024] Figure 7 It is a schematic planar structural diagram of the movable rack, gear block and toothless rocker of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the components such as the toothed disc, spline shaft and movable rack of the present invention.

[0026] Figure 9 It is a schematic planar structural diagram of the gear block, toothless rocker, second tension spring and other components of the present invention.

[0027] Figure 10 It is a schematic diagram of the three-dimensional structure of the toothless rocker, support block, second tension spring and other components of the present invention.

[0028] Figure 11 It is a schematic diagram of the three-dimensional structure of the components such as the toothed disc, the movable rack and the gear block of the present invention.

[0029] Figure 12 It is a schematic diagram of the three-dimensional structure of the support rod, guide rod and polygonal blocks of the present invention.

[0030] Figure 13 It is a schematic planar structural diagram of the toothless rocker, guide rod, polygonal stand and other components of the present invention.

[0031] Marked in the figure: 1-support frame, 101-transformer, 102-mounting frame, 103-drop-type fuse, 201-slide rail, 202-lifting frame, 203-chute, 204-support block, 205-closing member, 206-spring, 301-support ring, 302-hinge rod, 303-connecting rod, 304-rotating rod, 305-push-pull rod, 306-first tension spring, 307-positioning rod, 401-support rod, 402-wind direction blade, 501-support plate, 502-toothed disc, 503-spline shaft, 504-moving rack, 505-tooth block, 506-toothed rocker, 507-second tension spring, 601-support rod, 602-guide rod, 603-polygonal block, 7-buffer rubber block. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0033] Example 1: A transformer overload protection device with mechanical adaptive adjustment, such as Figures 1-11 As shown, it includes a support frame 1, a transformer 101, a mounting frame 102, a drop-out fuse 103, a slide rail 201, a lifting frame 202, a support block 204, a closing member 205, a spring 206, a control component and an adaptive adjustment component. The transformer 101 is installed on the lower side of the support frame 1 through a stud, and the upper side of the support frame 1 is connected to the mounting frame 102 through screws. Three drop-out fuses 103 are installed on the mounting frame 102 at intervals. The lower end of each drop-out fuse 103 is electrically connected to the incoming line end of the high-voltage side winding of the transformer 101 through a high-voltage insulated wire. The upper end of the drop-out fuse 103 is connected to the high-voltage transmission line through a high-voltage insulated wire. The front side of the upper part of the support frame 1 is symmetrically connected to the slide rail 201 through screws. The slide rails 201 slide between them. It is dynamically connected to a lifting frame 202, and a slide groove 203 is symmetrically provided on the left and right of the lifting frame 202. Support blocks 204 are slidably connected to the two slide grooves 203. At the same time, a support block 204 is fixedly connected to the middle of the lifting frame 202. A closing member 205 is slidably connected to each support block 204. A spring 206 is connected between the closing member 205 and the support block 204. In the initial state, the closing member 205 in the middle is in a low position, and the closing members 205 on both sides are in a high position, so as to realize the operation sequence of first closing the two sides and then the middle when the drop-out fuse 103 is closed. According to the wind direction setting, the height of the closing member 205 on the left is slightly lower than that of the closing member 205 on the right. A control component is provided on the support frame 1, and an adaptive adjustment component is provided on the mounting frame 102.

[0034] like Figure 1As shown, the drop-out fuse 103 is mainly composed of an insulator, a melting tube, a fuse element and an operating ring, wherein both ends of the fuse element are fixed to the metal end caps at both ends of the melting tube to ensure that they are in the center position inside the melting tube; the insulator is fixedly installed on the mounting frame 102, and forms a rotating pair connection with the lower end of the melting tube, providing a flexible rotating mechanical structure for the melting tube opening and closing process. In the closed state, the upper contact of the melting tube is electrically connected to the high-voltage power supply side wire, and the lower contact is electrically connected to the transformer 101 side wire, forming a complete conductive circuit. The operating ring is provided at one end of the melting tube, which is convenient for the operator to use the insulating operating rod to hook and perform the opening operation. The melting tube is made of high-temperature resistant and insulating material, which can effectively extinguish the arc when the fuse element melts; the insulator has excellent insulating performance and mechanical strength, ensuring the electrical insulation and structural stability of the device during operation.

[0035] like Figure 2-Figure 4 As shown, the control assembly includes a support ring 301, a hinged rod 302, a connecting rod 303, a rotating rod 304, a push-pull rod 305, a first tension spring 306 and a positioning rod 307. The upper side of the support frame 1 is symmetrically connected to the support ring 301, and the rear side of the support ring 301 is respectively connected to the hinged rod 302 for rotation. A connecting rod 303 is connected between the rear ends of the two hinged rods 302. The left and right ends of the connecting rod 303 are respectively connected to the rotating rod 304 for rotation. The lower side of the support frame 1 is vertically slidably connected to the support ring 301. There is a push-pull rod 305, the upper end of the push-pull rod 305 is rotatably connected to the two rotating rods 304, and a first tension spring 306 is connected between the left and right ends of the upper side of the push-pull rod 305 and the corresponding support ring 301. Positioning rods 307 are welded to the left and right ends of the lifting frame 202 respectively, and the front end of the hinged rod 302 is movably connected to the corresponding positioning rod 307, and through grooves for the hinged rod 302 to pass through are opened on the left and right sides of the lifting frame 202, providing guide constraints for the movement of the hinged rod 302.

[0036] like Figure 6-Figure 9 As shown, the adaptive adjustment component includes a support rod 401, a wind direction blade 402 and a drive component. The support rod 401 is rotatably connected to the middle part of the mounting frame 102. The support rod 401 extends vertically upward, and its upper end is fixedly connected to the wind direction blade 402 by a stud for sensing changes in wind direction. A drive component is provided on the lifting frame 202, which can convert wind force into mechanical motion according to the rotation of the wind direction blade 402, and then drive the relevant components to achieve adaptive adjustment of the closing operation of the drop-out fuse 103.

[0037] like Figures 6-11The gear 504 is connected to the gear 505 at the top of the lifting frame 202, and the gear 505 is connected to the gear 506 at the bottom of the lifting frame 202. The toothed rocker 506 swings around the rotating connection point between the rotating shaft and the lifting frame 202. The toothed part of the toothed rocker 506 can engage with the tooth block 505. A second tension spring 507 is connected between the left and right ends of the toothed rocker 506 and the lifting frame 202. The second tension spring 507 is in a stretched state, providing a stable tension for the toothed rocker 506 so that it remains in the initial position when it is not subjected to a sufficiently large external force. The left and right ends of the toothed rocker 506 are provided with guide grooves, which are movably connected to the support blocks 204 on both sides. When the toothed rocker 506 swings, the guide grooves can cooperate with the support blocks 204 to control the support blocks 204 on both sides to move up and down along the slide grooves 203 on the lifting frame 202, thereby adjusting the height of the closing members 205 on both sides, thereby realizing adaptive adjustment of the closing sequence and timing of the drop-out fuse 103 according to changes in wind direction.

[0038] Under normal operating conditions of the transformer 101, the melt of the drop-out fuse 103 remains in a taut state by virtue of its own mechanical tension, so that the fuse tube is firmly maintained in the closed position, forming a complete conductive circuit, and the wind direction blade 402 senses the change in ambient wind direction in real time. When the wind force reaches the trigger threshold (set to the wind force required to push the blade to rotate 180°), the wind direction blade 402 drives the support rod 401 to rotate, and drives the toothed disc 502 to rotate synchronously through the spline shaft 503. The circular motion of the toothed disc 502 is converted into the linear motion of the moving rack 504 through the meshing transmission of its tooth surface and the moving rack 504. Under the continuous action of wind force, the moving rack 504 drives the gear block 505 to move right to precisely mesh with the toothed part of the toothed rocker 506, driving the toothed rocker 506 and the rotating shaft to rotate, and the second tension spring 507 will also rotate, and it remains in a stretched state, providing stability for the rotation of the toothless rocker 506. During the rotation of the toothless rocker 506, its end guide groove and the support block 204 form a linkage constraint structure. When the toothless rocker 506 swings clockwise, the left guide groove pushes the corresponding support block 204 upward to move up along the slide groove 203, and the right guide groove drives the corresponding support block 204 to move downward synchronously, so that the closing members 205 on both sides form a height difference between the left and the right; for example, in a breeze, the moving rack 504 and the tooth block 505 move slightly, and the tooth block 505 will not engage with the toothless rocker 506, thereby not affecting the position state of the toothless rocker 506, and the closing members 205 on both sides can maintain their original state. In this way, adaptive adjustment of the closing members 205 on both sides can be achieved through the adaptive adjustment component.

[0039] When the transformer 101 is overloaded or short-circuited, the current flowing through the fuse exceeds its rated current threshold. According to Joule's law, the thermal effect of the current causes the fuse temperature to rise sharply until it reaches the melting point and melts. After the fuse melts, the fuse tube loses its restraining tension and falls freely around the rotating connection point with the insulator under the action of its own gravity and the elastic force of the contacts, forming a significant electrical disconnection gap, thereby safely isolating the transformer 101 from the high-voltage power supply and preventing the fault from expanding.

[0040] After the drop-out fuse 103 is tripped due to a fault in the transformer 101, it needs to be repaired. The purpose of the repair is to find out the cause of the fuse blowing, check whether other parts of the fuse are damaged, and confirm that the fault has been eliminated before closing the circuit. When closing the circuit, the operation must be carried out in the prescribed order, that is, first the upwind side, then the downwind side, and finally the middle phase, so as to reduce the risk of arc to the operator. During the specific operation, the operator pulls the push-pull rod 305 downward, the first tension spring 306 is stretched, the push-pull rod 305 moves downward, and drives the connecting rod 303 and the hinged rod 302 to rotate around the support ring 301 through the rotating rod 304. The hinged rod 302 is movably connected to the positioning rod 307. The rotation of the hinged rod 302 will push the positioning rod 307 and the lifting frame 202 to move upward along the slide rail 201. The lifting frame 202 then drives the support block 204 and the closing member 205 to move upward synchronously. At the same time, the support plate 5 01 moves upward synchronously, driving the components above it to move upward, the toothed disc 502 and the spline shaft 503 move upward synchronously, the spline shaft 503 is connected to the spline of the support rod 401, allowing the spline shaft 503 to move upward along the support rod 401. Due to the preset height difference of the three closing members 205, the closing member 205 at the highest position will first make the corresponding moving contact at the upper end of the melting tube gradually approach and finally make close contact with the static contact on the insulator to complete the closing action. At this time, the lifting frame 202 continues to move upward, and the closing member 205 at the highest position After the operation is completed, the spring 206 on it is compressed due to the movement of the lifting frame 202, which plays a buffering role. Then the closing piece 205 at the middle height drives the corresponding melting tube to close, and finally the closing piece 205 at the middle low position drives the corresponding melting tube to close, realizing the standard closing sequence of "first upwind side, then downwind side, and finally middle phase", and achieving the purpose of synchronous closing of the three drop-out fuses 103. After the closing is completed, the push-pull rod 305 is released, and the first tension spring 306 rebounds and resets, so that the push-pull The rod 305 moves upward, thereby driving the rotating rod 304 to reverse, thereby driving the hinged rod 302 and the connecting rod 303 to reverse. The hinged rod 302 simultaneously pushes the positioning rod 307 and the lifting frame 202 to move downward and reset along the slide rail 201, driving the support block 204 and the closing member 205 thereon to move downward, the closing member 205 is separated from the melting tube, and the spring 206 also rebounds to its normal state. The support plate 501 moves downward, and the components on it move downward synchronously. The toothed disk 502 and the spline shaft 503 also move downward and reset.

[0041] During routine maintenance operations, to ensure personnel safety, power outage maintenance procedures must be strictly followed. Operators must wear insulating protective equipment, use an insulating operating rod to hook the fuse operating ring, and pull it down steadily in the vertical direction to rotate the fuse around the hinge point to separate the moving and static contacts, forming a safe isolation fracture. After confirming that the equipment is powerless, the fuse body is inspected (including parameters such as the melt state, contact resistance, and insulator insulation resistance) and related component function tests are carried out. After the maintenance is completed, the closing operation is executed through the control component, and the various components work together to complete the synchronous closing of the three-phase fuses, restoring normal power supply to transformer 101.

[0042] Example 2: Based on Example 1, Figure 7 、 Figure 12 and Figure 13 As shown, it also includes a support rod 601, a guide rod 602 and a polygonal block 603. The front sides of the two support rings 301 are connected with a support rod 601 by screws. Two guide rods 602 are welded to the middle of the support rod 601. The rotating shaft on the toothless rocker 506 is connected to the polygonal block 603. The two guide rods 602 are arranged in parallel and the spacing is adapted to the size of the polygonal block 603. The outer contour of the polygonal block 603 forms a contact and matching relationship with the two guide rods 602. The left and right side walls of the polygonal block 603 are respectively designed as oblique sections at two different angles. By accurately setting the angle parameters, dual-angle adjustment control of the height of the closing members 205 on both sides can be achieved. When the toothless rocker 506 swings due to the rotation of the wind direction blade 402, the polygonal block 603 rotates synchronously to change its angle, and the cooperation between the side wall bevel and the guide rod 602 can be used to make the support blocks 204 on both sides rise and fall according to the preset logic. When the toothless rocker 506 moves upward along with the lifting frame 202, the side edges of the polygonal block 603 fit tightly with the inner surface of the guide rod 602. The guide rod 602 constrains the rotational freedom of the polygonal block 603, allowing it to move in a straight line in the vertical direction while maintaining a specific angle, effectively preventing the toothless rocker 506 from angular deviation during the lifting process, thereby ensuring the accuracy and stability of the height adjustment of the closing member 205.

[0043] like Figure 6As shown, a buffer rubber block 7 is also included. The left and right sides of the top of the support plate 501 are connected with the buffer rubber block 7 respectively by a high-strength adhesive. The position of the buffer rubber block 7 is precisely aligned with the movement trajectory of the moving rack 504. The material thereof is a rubber material with a high elastic modulus and good damping properties. When the moving rack 504 moves in a straight line under the drive of the toothless disk 502, the buffer rubber block 7 can play multiple roles: on the one hand, when the moving rack 504 moves to the extreme position, it absorbs the impact energy through its own elastic deformation, plays a buffering and shock-absorbing effect, and reduces the collision stress between mechanical components; on the other hand, as a physical limiting structure, it limits the travel range of the moving rack 504 to prevent it from failing to engage with the toothless rocker 506 due to excessive movement, thereby ensuring the reliability and stability of the movement of the drive component.

Claims

1. A transformer overload protection device with mechanical adaptive adjustment, characterized in that: The invention comprises a support frame (1), a transformer (101), a mounting frame (102), a drop-out fuse (103), a slide rail (201), a lifting frame (202), a support block (204), a closing member (205), a spring (206), a control component and an adaptive adjustment component. The transformer (101) is installed on the lower side of the support frame (1), the mounting frame (102) is connected to the upper side of the support frame (1), and three drop-out fuses (103) are installed on the mounting frame (102) at intervals. The lower end of each drop-out fuse (103) is electrically connected to the incoming line end of the high-voltage side winding of the transformer (101) through a high-voltage insulated wire, and the upper end of the drop-out fuse (103) is electrically connected to the incoming line end of the high-voltage side winding of the transformer (101) through a high-voltage insulated wire. The high-voltage insulated conductor is connected to the high-voltage transmission line. The front side of the upper portion of the support frame (1) is symmetrically connected with a slide rail (201). A lifting frame (202) is slidably connected between the slide rails (201). The lifting frame (202) is symmetrically provided with a slide groove (203). The two slide grooves (203) are respectively slidably connected with a support block (204). At the same time, a support block (204) is fixedly connected to the middle of the lifting frame (202). A closing member (205) is slidably connected to each support block (204). A spring (206) is connected between the closing member (205) and the support block (204). A control component is provided on the support frame (1), and an adaptive adjustment component is provided on the mounting frame (102).

2. The transformer overload protection device with mechanical adaptive adjustment according to claim 1, characterized in that: The drop-out fuse (103) is mainly composed of an insulator, a melting tube, a fuse element and an operating ring, wherein the two ends of the fuse element are fixed to the metal end covers at the two ends of the melting tube; the insulator is fixedly mounted on the mounting frame (102) and forms a rotating pair connection with the lower end of the melting tube. In the closed state, the upper contact of the melting tube is electrically connected to the high-voltage power supply side conductor, and the lower contact is electrically connected to the transformer (101) side conductor. The operating ring is arranged at one end of the melting tube.

3. The transformer overload protection device with mechanical adaptive adjustment according to claim 1, characterized in that: The control assembly includes a support ring (301), a hinge rod (302), a connecting rod (303), a rotating rod (304), a push-pull rod (305), a first tension spring (306) and a positioning rod (307). The upper side of the support frame (1) is symmetrically connected to the support ring (301). The rear side of the support ring (301) is respectively connected to the hinge rod (302) in a rotating manner. A connecting rod (303) is connected between the rear ends of the two hinge rods (302). The left and right ends of the connecting rod (303) are respectively rotated. A rotating rod (304) is connected, and a push-pull rod (305) is vertically slidably connected to the lower side of the support frame (1). The upper end of the push-pull rod (305) is rotatably connected to the two rotating rods (304). In addition, a first tension spring (306) is connected between the left and right ends of the upper side of the push-pull rod (305) and the corresponding support ring (301). The left and right ends of the lifting frame (202) are respectively connected to positioning rods (307), and the front end of the hinged rod (302) is movably connected to the corresponding positioning rod (307).

4. The transformer overload protection device with mechanical adaptive adjustment according to claim 1, characterized in that: The adaptive adjustment component comprises a support rod (401), a wind direction blade (402) and a driving component. The middle part of the mounting frame (102) is rotatably connected to the support rod (401). The support rod (401) extends vertically upward, and the upper end thereof is fixedly connected to the wind direction blade (402). The driving component is provided on the lifting frame (202).

5. The transformer overload protection device with mechanical adaptive adjustment according to claim 4, characterized in that: The driving assembly includes a support plate (501), a toothed disc (502), a spline shaft (503), a movable rack (504), a tooth block (505), a toothed rocker (506) and a second tension spring (507). The top of the lifting frame (202) is connected to the support plate (501), the rear side of the support plate (501) is rotatably connected to the toothed disc (502), the top of the toothed disc (502) is connected to the spline shaft (503), the spline shaft (503) is spline-connected to the support rod (401), the top of the support plate (501) is slidably connected to the movable rack (504), and the movable rack The bottom of (504) is connected to a tooth block (505), and the rear side of the lifting frame (202) is connected to a toothless rocker (506) through a rotating shaft. The toothless rocker (506) swings around the rotating connection point between the rotating shaft and the lifting frame (202). The toothed part of the toothless rocker (506) can engage with the tooth block (505). A second tension spring (507) is connected between the left and right ends of the toothless rocker (506) and the lifting frame (202). The left and right ends of the toothless rocker (506) are provided with guide grooves, which are respectively movably connected to the support blocks (204) on both sides.

6. The transformer overload protection device with mechanical adaptive adjustment according to claim 5, characterized in that: The invention also includes a support rod (601), a guide rod (602) and a polygonal stand (603). The support rod (601) is connected between the front sides of the two support rings (301). The middle part of the support rod (601) is connected to the two guide rods (602). The rotating shaft on the toothless rocker (506) is connected to the polygonal stand (603). The two guide rods (602) are arranged in parallel and the spacing is adapted to the size of the polygonal stand (603). The outer contour of the polygonal stand (603) forms a contact and matching relationship with the two guide rods (602).

7. The transformer overload protection device with mechanical adaptive adjustment according to claim 6, characterized in that: The left and right side walls of the polygonal vertical block (603) are respectively designed to be oblique sections with two different angles.

8. The transformer overload protection device with mechanical adaptive adjustment according to claim 5, characterized in that: It also includes a buffer rubber block (7), and the buffer rubber blocks (7) are respectively connected to both sides of the top of the support plate (501), and the position of the buffer rubber block (7) is precisely aligned with the movement trajectory of the moving rack (504).

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