A transformer overload protection device with mechanical self-adaptive adjustment

Abstract

The present application relates to the technical field of transformer overload protection, and particularly relates to a transformer overload protection device with mechanical self-adaptive adjustment. The present application provides a transformer overload protection device with mechanical self-adaptive adjustment, which comprises a support frame, a transformer, a mounting frame, a drop-out fuse, a slide 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 at the lower side of the support frame, and the mounting frame is connected to the upper side of the support frame. Through the linkage design of the preset height difference of the closing piece and the control assembly, the standard closing sequence of "firstly the windward side, then the leeward side, and finally the middle phase" is realized, the risk of phase-to-phase short circuit caused by human operation error is avoided, and the safety of electric power operation is significantly improved. Meanwhile, the self-adaptive adjustment assembly automatically adjusts the height of the closing piece according to the wind direction, further optimizes the closing timing, and reduces the harm of electric arc to the equipment and the operator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer overload protection, and particularly relates to a transformer overload protection device with mechanical adaptive adjustment. BACKGROUND

[0002] In the power system, the transformer is a key device for power transmission and distribution, and the performance of its overload protection device directly affects the safety and stability of power supply. The traditional drop-out fuse, as a commonly used transformer overload protection device, has the advantages of simple structure and low cost, but has many limitations in actual application.

[0003] At present, the closing operation of the existing drop-out fuse is mostly completed manually by artificial, lacking automatic and intelligent control. When the operator performs the closing operation, the sequence of "first on the wind side, then on the downwind side, and finally on the middle phase" should be strictly followed to reduce the arc hazard, but the artificial operation is easily disturbed by environmental factors and human factors, and there is a risk of operation error, which may cause phase-to-phase short circuit and other faults, endangering the safety of equipment and the lives of personnel. In addition, under the complex and changeable outdoor environmental conditions, the wind direction has a significant influence on the movement and diffusion of the arc during the closing process of the fuse. Under the action of strong wind, the arc may be blown to the adjacent phase conductor, increasing the probability of phase-to-phase short circuit, and the existing protection device cannot dynamically adjust the closing strategy according to the change of wind direction, making it difficult to adapt to the complex outdoor operating environment.

[0004] With the advancement of smart grid construction, higher requirements are put forward for the automation and intelligence level of power equipment. The traditional fixed mode overload protection device cannot meet the needs of modern power systems for safety, efficiency and intelligence. It is urgent to develop a transformer overload protection device that can adaptively adjust according to environmental factors (such as wind direction) to improve the safety and accuracy of the closing operation and enhance the adaptability of the equipment in complex environments, ensuring the stable operation of the power system. SUMMARY

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

[0006] The technical scheme of the present application is: a transformer overload protection device with mechanical self-adaptive adjustment, comprising a support frame, a transformer, a mounting frame, drop-out fuses, sliding rails, a lifting frame, support blocks, closing pieces, springs, a control assembly and a self-adaptive adjustment assembly, the transformer is installed on the lower side of the support frame, 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 line end of the high-voltage side winding of the transformer through high-voltage insulating wires, the upper end of the drop-out fuse is connected to the high-voltage transmission line through high-voltage insulating wires, the front side of the upper part of the support frame is symmetrically connected with the sliding rails, the lifting frame is slidingly connected between the sliding rails, the lifting frame is symmetrically provided with sliding grooves, each sliding groove is slidingly connected with a support block, and a support block is also fixedly connected to the middle part of the lifting frame, each support block is slidingly connected with a closing piece, the closing piece and the support block are connected with a spring, the control assembly is arranged on the support frame, and the self-adaptive adjustment assembly is arranged on the mounting frame.

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

[0008] As a preferred technical scheme of the present application, the control assembly comprises 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 upper side of the support frame is symmetrically connected with the support ring, the rear side of the support ring is rotatably connected with the hinged rod, the connecting rod is connected between the rear ends of the two hinged rods, the rotating rod is rotatably connected to the left and right ends of the connecting rod, the push-pull rod is vertically slidingly connected to the lower side of the support frame, the upper end of the push-pull rod is rotatably connected with the two rotating rods, and the left and right ends of the upper side of the push-pull rod are connected with the corresponding support rings through the first tension spring, the left and right ends of the lifting frame are connected with the positioning rod, and the front end of the hinged rod is movably connected with the corresponding positioning rod.

[0009] As a preferred technical scheme of the present application, the self-adaptive adjustment assembly comprises a support rod, a wind direction blade and a driving assembly, the support rod is rotatably connected to the middle part of the mounting frame, the support rod vertically extends upward, the wind direction blade is fixedly connected to the upper end of the support rod, and the driving assembly is arranged on the lifting frame.

[0010] As a preferred embodiment of the present invention, the drive assembly includes a support plate, a toothed disc, a splined shaft, a movable rack, a toothed block, a toothed rocker arm, and a second tension spring. The support plate is connected to the top of the lifting frame, and the toothed disc is rotatably connected to the rear side of the support plate. The splined shaft is connected to the top of the toothed disc and is splinedly connected to the support rod. The movable rack is slidably connected to the top of the support plate, and a toothed block is connected to the bottom of the movable rack. The toothed rocker arm is rotatably connected to the rear side of the lifting frame via a rotating shaft. The toothed rocker arm swings around the rotation connection point between the rotating shaft and the lifting frame. The toothed part of the toothed rocker arm can mesh with the toothed block. A second tension spring is connected between the left and right ends of the toothed rocker arm and the lifting frame. Guide grooves are provided at the left and right ends of the toothed rocker arm, and these guide grooves are movably connected to the support blocks on both sides, respectively.

[0011] As a preferred embodiment of the present invention, it further includes a support rod, a guide rod, and a polygonal block. A support rod is connected between the front sides of the two support rings, and two guide rods are connected in the middle of the support rod. A polygonal block is connected to the rotating shaft on the toothed rocker arm. 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 and the two guide rods form a contact fit relationship.

[0012] As a preferred embodiment of the present invention, the left and right sidewalls of the polygonal block are designed as oblique cut surfaces with two different angles.

[0013] As a preferred embodiment of the present invention, it further includes buffer blocks, with buffer blocks connected to both sides of the top of the support plate, and the positions of the buffer 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 device and the linkage design of the control components, the standard closing sequence of "first the upwind side, then the downwind side, and finally the middle phase" is achieved, avoiding the risk of phase-to-phase short circuits caused by human error and significantly improving the safety of power operations. At the same time, the adaptive adjustment component automatically adjusts the height of the closing device according to the wind direction, further optimizing the closing sequence and reducing the harm of electric arc to equipment and operators.

[0015] 2. The combination of drop-out fuses and adaptive adjustment components enables rapid circuit disconnection and fault isolation in the event of transformer overload or short circuit. After the fuse melts, a clear disconnection gap is formed, effectively preventing the fault from escalating. Simultaneously, timely maintenance and precise closing of the fuses reduce insulation aging caused by abnormal current surges, extending the service life of both the transformer and the fuse.

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

[0017] 4. The limiting cooperation between the multi-sided upright block and the guide rod ensures that the toothed rocker maintains a stable angle during the lifting and lowering process, preventing the operation accuracy of the closing component from being affected by the angle deviation; the buffer rubber block has a buffering, shock absorption and limiting effect on the moving rack, avoiding damage to mechanical parts due to collision, ensuring the smooth operation of the drive component, and improving the overall reliability and stability of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the components of the present invention, including the drop-out fuse, slide rail, and lifting frame.

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

[0021] Figure 4 This is a three-dimensional structural diagram of the push-pull rod, the first tension spring, and the positioning rod of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the support block, closing component, and spring of the present invention.

[0023] Figure 6 This is a three-dimensional structural diagram of the components of the present invention, such as the support rod, wind vane, and support plate.

[0024] Figure 7 This is a schematic diagram of the planar structure of the moving rack, tooth block, and toothed rocker arm components of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the components of the present invention, including the toothed disc, spline shaft, and moving rack.

[0026] Figure 9 This is a schematic diagram of the planar structure of the toothed block, the missing tooth rocker, and the second tension spring of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the toothed rocker arm, support block, and second tension spring of the present invention.

[0028] Figure 11 This is a three-dimensional structural diagram of the components of the present invention, including the toothed disc, the movable rack, and the toothed block.

[0029] Figure 12 This is a three-dimensional structural diagram of the support rod, guide rod, and polygonal block components of the present invention.

[0030] Figure 13 This is a schematic diagram of the planar structure of the toothed rocker, guide rod, and polygonal block components of the present invention.

[0031] The markings in the diagram are as follows: 1-Support frame, 101-Transformer, 102-Mounting frame, 103-Drop-out fuse, 201-Slide rail, 202-Lifting frame, 203-Slide groove, 204-Support block, 205-Closing component, 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 vane, 501-Support plate, 502-Toothed disc, 503-Splined shaft, 504-Moving rack, 505-Toothed block, 506-Toothed rocker arm, 507-Second tension spring, 601-Support rod, 602-Guide rod, 603-Polygonal block, 7-Buffer rubber block. Detailed Implementation

[0032] The present invention will be further described in 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, the system includes a support frame 1, a transformer 101, a mounting frame 102, drop-out fuses 103, slide rails 201, a lifting frame 202, a support block 204, a closing component 205, a spring 206, a control assembly, and an adaptive adjustment assembly. The transformer 101 is mounted on the lower side of the support frame 1 via studs. The mounting frame 102 is connected to the upper side of the support frame 1 via screws. Three drop-out fuses 103 are spaced apart on the mounting frame 102. The lower end of each drop-out fuse 103 is electrically connected to the incoming terminal of the high-voltage winding of the transformer 101 via a high-voltage insulated wire. The upper end of each drop-out fuse 103 is connected to a high-voltage transmission line via a high-voltage insulated wire. Slide rails 201 are symmetrically connected to the upper front side of the support frame 1 via screws. The slide rails 201 slide between each other. A lifting frame 202 is dynamically connected. The lifting frame 202 has symmetrical sliding grooves 203 on the left and right sides. Support blocks 204 are slidably connected to the two sliding grooves 203 respectively. At the same time, a support block 204 is also fixedly connected to the middle of the lifting frame 202. A closing component 205 is slidably connected to each support block 204. A spring 206 is connected between the closing component 205 and the support block 204. In the initial state, the closing component 205 in the middle is in a low position, and the closing components 205 on both sides are in a high position. This realizes the operation sequence of closing the drop-out fuse 103 from the two sides to the middle. According to the wind direction, the height of the left closing component 205 is slightly lower than that of the right closing component 205. 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 fuse tube, a fuse body and an operating ring, wherein the fuse body is fixed at both ends of the metal end cover of the fuse tube to ensure that it is at the center position inside the fuse tube; the insulator is fixedly installed on the mounting bracket 102 and is connected with the lower end of the fuse tube to form a rotating pair, providing a flexible rotating mechanical structure for the fuse tube during the opening and closing process; in the closed state, the upper contact of the fuse tube is electrically connected with the high-voltage power supply side wire, and the lower contact is electrically connected with the transformer 101 side wire to form a complete conduction loop; the operating ring is arranged at one end of the fuse tube, which is convenient for the operator to use the insulating operating rod to hook and operate; the fuse tube is made of high-temperature-resistant and excellent insulating material, which can effectively extinguish the arc when the fuse body is fused; the insulator has excellent insulating performance and mechanical strength, which ensures the electrical insulation and structural stability during the operation of the device.

[0035] As shown in Figures 2-4 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 support frame 1 is symmetrically connected with the support ring 301 on the upper side, and the hinged rod 302 is rotatably connected with the support ring 301 on the rear side. The connecting rod 303 is connected between the rear ends of the two hinged rods 302, and the rotating rod 304 is rotatably connected with the connecting rod 303 on the left and right ends. The push-pull rod 305 is vertically and slidingly connected with the lower side of the support frame 1, and the upper end of the push-pull rod 305 is rotatably connected with the two rotating rods 304. The first tension spring 306 is connected between the upper side of the push-pull rod 305 and the corresponding support ring 301. The positioning rod 307 is welded on the left and right ends of the lifting frame 202, and the front end of the hinged rod 302 is movably connected with the corresponding positioning rod 307. The lifting frame 202 is provided with a through slot on the left and right sides for the hinged rod 302 to pass through, which provides guidance and constraint for the movement of the hinged rod 302.

[0036] As shown in Figures 6-9 The adaptive adjustment assembly includes a support rod 401, a wind direction blade 402 and a driving assembly. The support rod 401 is rotatably connected in the middle of the mounting bracket 102, and the wind direction blade 402 is fixedly connected on the upper end of the support rod 401 through a stud, which is used to sense the change of wind direction. The driving assembly is arranged on the lifting frame 202, which can convert the wind force into mechanical movement according to the rotation of the wind direction blade 402, and then drive the related components to act, so as to realize the adaptive adjustment of the closing operation of the drop-out fuse 103.

[0037] As shown in Figures 6-11As shown, the drive assembly includes a support plate 501, a missing tooth disc 502, a spline shaft 503, a moving rack 504, a tooth block 505, a missing tooth rocker 506 and a second tension spring 507, the top of the lifting frame 202 is connected with the support plate 501 through the stud, which is the support base of the drive assembly, the rear side of the support plate 501 is rotatably connected with the missing tooth disc 502, the top of the missing tooth disc 502 is connected with the spline shaft 503, the spline shaft 503 is spline connected with the support rod 401, which can transmit the rotary motion of the missing tooth disc 502 to the support rod 401, while allowing the support rod 401 to move axially within a certain range, the top of the support plate 501 is slidably connected with the moving rack 504, the bottom of the moving rack 504 is integrally connected with the tooth block 505, the tooth block 505 and the moving rack 504 form an integral whole, moving synchronously with the moving rack 504, the rear side of the lifting frame 202 is rotatably connected with the missing tooth rocker 506 through the rotating shaft, the missing tooth rocker 506 swings around the rotating connection point between the rotating shaft and the lifting frame 202, the toothed part of the missing tooth rocker 506 can engage with the tooth block 505, the left and right ends of the missing tooth rocker 506 are connected with the lifting frame 202 through the second tension spring 507, the second tension spring 507 is in tension, providing stable tension to the missing tooth rocker 506, so that it remains in the initial position when not subjected to enough external force, the left and right ends of the missing tooth rocker 506 are provided with guide grooves, which are movably connected with the support blocks 204 on both sides, so that when the missing tooth rocker 506 swings, it can control the lifting movement of the support blocks 204 on both sides along the sliding groove 203 on the lifting frame 202 through the cooperation of the guide grooves and the support blocks 204, and then adjust the height of the two side closing pieces 205, realizing the self-adaptive adjustment of the closing sequence and timing of the drop-out fuse 103 according to the change of wind direction.

[0038] In the normal operation condition of the transformer 101, the fuse of the drop-out fuse 103 is kept in tension state by its own mechanical tension, so that the fuse tube is stably maintained in the closed position to form a complete conduction loop. The wind direction blade 402 senses the change of the wind direction in real time. When the wind reaches the trigger threshold (set as the wind required to push the blade to rotate 180°), the wind direction blade 402 drives the support rod 401 to rotate, and drives the missing tooth disc 502 to rotate synchronously through the spline shaft 503. The circular motion of the missing tooth disc 502 is transmitted to the linear motion of the moving rack 504 through the meshing transmission of the tooth surface. Under the continuous action of the wind, the moving rack 504 drives the tooth block 505 to move right to precisely mesh with the toothed part of the missing tooth rocker 506, drives the missing tooth rocker 506 and the rotating shaft to rotate, and the second tension spring 507 also rotates, which provides stability for the rotation of the missing tooth rocker 506. In the rotation process of the missing tooth rocker 506, the end guide groove and the support block 204 form a linkage constraint structure. When the missing tooth rocker 506 swings clockwise, the left guide groove pushes the corresponding support block 204 upward along the sliding groove 203, and the right guide groove drives the corresponding support block 204 to move downward synchronously, so that the two sides of the closing piece 205 form a height difference of left high and right low. When the wind is weak, the slight movement of the moving rack 504 and the tooth block 505 does not mesh with the missing tooth rocker 506, so as not to affect the position state of the missing tooth rocker 506, and the two sides of the closing piece 205 can maintain the original state. Thus, the self-adaptive adjustment assembly can realize the self-adaptive adjustment of the two sides of the closing piece 205.

[0039] When the transformer 101 has an overload or short circuit fault, the current flowing through the fuse exceeds the rated current threshold, and according to Joule's law, the current heat effect causes the temperature of the fuse to rise sharply until it reaches the melting point and is fused. After the fuse is fused, the fuse tube loses the constraint tension and freely falls around the rotating connection point of the insulator under the action of its own gravity and the contact spring force, forming a significant electrical disconnection gap, thereby safely isolating the transformer 101 from the high-voltage power supply and avoiding the expansion of the fault range.

[0040] After the drop-out fuse 103 is tripped due to the transformer 101 failure, maintenance is required. The purpose of the maintenance is to find out the reason for the fuse to be blown, to check whether other parts of the fuse are damaged, and to confirm that the fault is eliminated before closing. When closing, the operation should be performed in the specified order, i.e., first the windward side, then the leeward side, and finally the middle phase, so as to reduce the risk of electric arc to the operator. In the specific operation, the operator pulls down the push-pull rod 305, the first tension spring 306 is stretched, the push-pull rod 305 moves downward, the connecting rod 303 and the articulated rod 302 are driven to rotate around the support ring 301 through the rotating rod 304, the articulated rod 302 is movably connected with the positioning rod 307, the rotation of the articulated rod 302 pushes the positioning rod 307 and the lifting frame 202 to move upward along the slide rail 201, the lifting frame 202 in turn drives the support block 204 and the closing member 205 to move upward synchronously, at the same time, the support plate 501 moves upward synchronously, driving the components thereon to move upward, the gear rack 502 and the spline shaft 503 move upward synchronously, the spline shaft 503 is connected with 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 movable contact at the upper end of the corresponding fuse tube gradually approach and finally tightly contact with the stationary contact on the insulator, completing the closing operation. At this time, the lifting frame 202 continues to move upward, the closing member 205 at the high position is operated, and the spring 206 thereon is compressed due to the movement of the lifting frame 202, playing a buffering role. Then, the closing member 205 at the middle height drives the corresponding fuse tube to close, and finally, the closing member 205 at the low position drives the corresponding fuse tube to close, realizing the standard closing sequence of “first the windward side, then the leeward side, and finally the middle phase”, and achieving the purpose of synchronous closing of the three drop-out fuses 103. After closing, the push-pull rod 305 is released, the first tension spring 306 rebounds and resets, making the push-pull rod 305 move upward, in turn driving the rotating rod 304 to reverse, so as to drive the articulated rod 302 and the connecting rod 303 to reverse, the articulated rod 302 simultaneously pushes the positioning rod 307 and the lifting frame 202 to move downward along the slide rail 201 to reset, driving the support block 204 and the closing member 205 thereon to move downward, the closing member 205 is separated from the fuse tube, and the spring 206 also rebounds to the normal state. The support plate 501 moves downward, the components thereon move downward synchronously, and the gear rack 502 and the spline shaft 503 also move downward to reset.

[0041] In daily maintenance work, in order to protect the safety of personnel, the power-off maintenance procedure must be strictly implemented, the operator wears insulating protective equipment, uses an insulating operating rod to hook the fuse tube operating ring, smoothly pulls down along the vertical direction, makes the fuse tube rotate around the hinge point to separate the moving and static contacts, forms a safe isolation breaking point, after confirming that the equipment is not electrified, the fuse body inspection (including the state of the fuse body, the contact resistance of the contact, the insulation resistance of the insulator and other parameter detection) and the function test of the related components are carried out. After the maintenance is completed, the closing operation is performed through the control assembly, and the synchronous closing of the three-phase fuse is completed through the cooperative action of each component, and the normal power supply of the transformer 101 is restored.

[0042] Example 2: Based on example 1, as shown in Figure 7 、 Figure 12 and Figure 13 , it further includes a support rod 601, a guide rod 602 and a multi-edge vertical block 603, the support rod 601 is connected between the front sides of the two support rings 301 through screws, the two guide rods 602 are welded in the middle of the support rod 601, the multi-edge vertical block 603 is connected to the rotating shaft on the missing-tooth rocker 506, the two guide rods 602 are arranged in parallel and the distance between them is matched with the size of the multi-edge vertical block 603, the outer contour of the multi-edge vertical block 603 forms a contact fitting relationship with the two guide rods 602, the left and right side walls of the multi-edge vertical block 603 are designed as two different angle inclined surfaces, through the accurate setting of the angle parameters, the double-angle height adjustment control of the two sides of the closing piece 205 can be realized, when the missing-tooth rocker 506 swings due to the rotation of the wind direction blade 402, the multi-edge vertical block 603 synchronously rotates to change the angle, the cooperation of the side wall inclined surface and the guide rod 602 can make the two sides of the support block 204 rise and fall according to the preset logic, when the missing-tooth rocker 506 moves upward with the lifting frame 202, the side of the multi-edge vertical block 603 closely fits the inner side of the guide rod 602, the guide rod 602 restricts the rotation degree of freedom of the multi-edge vertical block 603, so that it moves linearly along the vertical direction in a state of maintaining a certain angle, effectively avoids the angle deviation of the missing-tooth rocker 506 in the lifting process, and ensures the accuracy and stability of the height adjustment of the closing piece 205.

[0043] As shown in Figure 6As shown, it also includes buffer rubber blocks 7, the top of the support plate 501 is connected with buffer rubber blocks 7 through high-strength adhesive on both sides, the position of the buffer rubber blocks 7 is accurately aligned with the movement track of the moving rack 504, and the material thereof is selected from rubber materials with high elastic modulus and good damping characteristics. When the moving rack 504 moves linearly under the drive of the toothless disc 502, the buffer rubber blocks 7 can play multiple roles: on the one hand, when the moving rack 504 moves to the limit position, the impact energy can be absorbed through the elastic deformation of the buffer rubber blocks 7, so as to achieve the effect of buffering and shock absorption, and reduce the collision stress between mechanical parts; on the other hand, as a physical limiting structure, the stroke range of the moving rack 504 is limited, so that the meshing failure of the tooth block 505 and the toothless rocker 506 caused by excessive movement is prevented, thereby ensuring the reliability and stability of the movement of the driving assembly.

Claims

1. A transformer overload protection device with mechanical self-adapting regulation, characterized in that: The utility model relates to a kind of power supply device, including support frame (1), transformer (101), mounting frame (102), drop-out fuse (103), slide rail (201), lifting frame (202), support block (204), closing piece (205), spring (206), control assembly and self-adapting adjusting assembly, transformer (101) is installed in support frame (1) lower side, mounting frame (102) is connected in support frame (1) upper side, three drop-out fuses (103) are installed on mounting frame (102) with interval, each drop-out fuse (103) lower end is electrically connected with the incoming line end of transformer (101) high voltage side winding by high-voltage insulating conductor, drop-out fuse (103) upper end is connected to high-voltage transmission line by high-voltage insulating conductor, slide rail (201) is connected symmetrically on the front side of support frame (1) upper part, lifting frame (202) is slidably connected between slide rail (201), sliding groove (203) is symmetrically set up on lifting frame (202), two sliding grooves (203) are slidably connected with support block (204) respectively, while lifting frame (202) middle part is also fixedly connected with a support block (204), closing piece (205) is slidably connected on each support block (204), spring (206) is connected between closing piece (205) and support block (204), control assembly is equipped on support frame (1), self-adapting adjusting assembly is equipped on mounting frame (102);Control assembly includes support ring (301), hinged rod (302), connecting rod (303), rotating rod (304), push-pull rod (305), first tension spring (306) and positioning rod (307), support ring (301) is symmetrically connected on support frame (1) upper side, hinged rod (302) is rotatably connected on the rear side of support ring (301) respectively, connecting rod (303) is connected between the rear end of two hinged rods (302), rotating rod (304) is rotatably connected on the left and right ends of connecting rod (303) respectively, push-pull rod (305) is vertically slidably connected on the lower side of support frame (1), and the upper end of push-pull rod (305) is rotatably connected with two rotating rods (304), and the upper left and right ends of push-pull rod (305) are rotatably connected with corresponding support ring (301) respectively, and first tension spring (306) is connected between the upper left and right ends of push-pull rod (305) and corresponding support ring (301) respectively, positioning rod (307) is connected on the left and right ends of lifting frame (202) respectively, and hinged rod (302) front end is movably connected with corresponding positioning rod (307);Self-adapting adjusting assembly includes support rod (401), wind direction blade (402) and drive assembly, support rod (401) is rotatably connected in the middle of mounting frame (102), and support rod (401) vertically extends upwards, and wind direction blade (402) is fixedly connected on the upper end of support rod (401), and drive assembly is equipped on lifting frame (202).

2. A transformer overload protection device with mechanical self-adjustment according to claim 1, characterized in that: Drop-out fuse (103) is mainly composed of insulator, fuse tube, fuse and operating ring, wherein, the both ends of fuse are fixed to the metal end cover of the both ends of fuse tube;Insulator is fixedly installed on mounting frame (102), and forms rotary pair connection with the lower end of fuse tube, in the closing state, the upper contact of fuse tube is electrically connected with high-voltage power supply side conductor, the lower contact is electrically connected with transformer (101) side conductor, and operating ring is arranged in one end of fuse tube.

3. A transformer overload protection device with mechanical self-adjustment according to claim 2, characterized in that: The driving assembly comprises a support plate (501), a missing-tooth disc (502), a spline shaft (503), a moving rack (504), a tooth block (505), a missing-tooth rocker (506) and a second tension spring (507), the top of the lifting frame (202) is connected with the support plate (501), the rear side of the support plate (501) is rotationally connected with the missing-tooth disc (502), the top of the missing-tooth disc (502) is connected with the spline shaft (503), the spline shaft (503) is spline-connected with the support rod (401), the top of the support plate (501) is slidingly connected with the moving rack (504), the bottom of the moving rack (504) is connected with the tooth block (505), the rear side of the lifting frame (202) is rotationally connected with the missing-tooth rocker (506) through a rotating shaft, the missing-tooth rocker (506) swings around the rotating connection point between the rotating shaft and the lifting frame (202), the toothed part of the missing-tooth rocker (506) can engage with the tooth block (505), the left and right ends of the missing-tooth rocker (506) are both connected with the second tension spring (507), the left and right ends of the missing-tooth rocker (506) are provided with guide grooves which are movably connected with the support blocks (204) on the left and right sides.

4. A transformer overload protection device with mechanical self-adjustment according to claim 3, characterized in that: The support rod (601), the guide rod (602) and the multi-edge vertical block (603) are further included, the support rod (601) is connected between the front sides of the two support rings (301), the support rod (601) is connected with the two guide rods (602) at the middle part, the rotating shaft of the missing-tooth rocker (506) is connected with the multi-edge vertical block (603), the two guide rods (602) are parallelly arranged and the distance therebetween is adapted to the size of the multi-edge vertical block (603), the outer contour of the multi-edge vertical block (603) is in contact with the two guide rods (602).

5. A transformer overload protection device with mechanical self-adjustment according to claim 4, characterized in that: The left and right side walls of the multi-edge vertical block (603) are respectively designed as two inclined surfaces with different angles.

6. A transformer overload protection device with mechanical self-adjustment according to claim 5, characterized in that: The buffer rubber blocks (7) are further included, the top of the support plate (501) is connected with the buffer rubber blocks (7) on the left and right sides, and the positions of the buffer rubber blocks (7) are accurately aligned with the movement track of the moving rack (504).

Images