Outdoor high-voltage drop-out fuse

Abstract

The application discloses an outdoor high-voltage drop-out type fuse, and belongs to the technical field of fuses. The outdoor high-voltage drop-out type fuse comprises a ceramic insulator, an upper trunnion and a lower trunnion. The upper surface of the upper trunnion is provided with a top buckle mechanism. The bottom of the lower trunnion is sequentially bolt-connected with a lower static contact. The front side of the lower static contact is provided with a driving mechanism. The inside of the lower static contact is provided with a fusing mechanism. The fusing mechanism comprises a fuse tube. The bottom end of the fuse tube is provided with a support assembly used in cooperation with the lower static contact. The support assembly comprises a support rod. One end of the support rod is fixedly connected with a gear. In use, an operator pushes a push plate to drive the gear to rotate through the clamping teeth, and then drives the support rod to rotate, so that the fuse tube makes circular arc motion upward with the support rod as a fixed shaft. The closing path is accurately controllable and uniquely repeatable, and the uncontrollable operation of directly hooking and pushing by means of an insulating operating rod in the prior art is completely replaced.

Description

Technical Field

[0001] This invention relates to the field of fuse technology, and more specifically, to an outdoor high-voltage drop-out fuse. Background Technology

[0002] Outdoor high-voltage drop-out fuses are critical overload and short-circuit protection devices for power distribution networks. They rely on the fuse tube to drop out and form a visible break to ensure maintenance safety. However, these devices are usually installed at a height of more than 4.5 meters above the ground. Operators must use an insulated operating rod several meters long to indirectly close the circuit. This special working mode of high altitude, insulated isolation, and single-arm operation poses extremely high technical challenges to the precise engagement of the moving and stationary contacts when power is supplied and the circuit is closed.

[0003] For the existing closing operation process, the operator needs to wear a full set of insulated protective equipment, stand below the fuse, use an insulating rod to hook the fuse tube operating ring, align the moving contact with the upper stationary contact (duckbill cover), and use the instantaneous impact force to complete the mechanical self-locking; after closing, it is necessary to visually inspect whether the locking length meets the standard, and use the insulating rod to lightly press or pull to qualitatively confirm the tightness and stability of the locking.

[0004] Although existing technologies follow standardized operating procedures, in practical applications, due to the high installation position of the fuse and the elastic bending of the several-meter-long insulating operating rod, it is prone to uncontrollable swaying under the influence of high-altitude winds. This physical characteristic makes it difficult for the operator to accurately control the trajectory and force of pushing the fuse tube into the duckbill cover, which can easily lead to poor consistency in the closing operation. Consequently, it is easy to cause "false closing" due to incomplete closing, resulting in poor contact, overheating, or even burnout of the contacts, seriously threatening the operational safety of the power grid. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide an outdoor high-voltage drop-out fuse, which aims to solve the above-mentioned technical problems.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An outdoor high-voltage drop-out fuse includes a ceramic insulator, with an upper trunnion and a lower trunnion fixedly connected to its upper and lower ends, respectively. The upper surface of the upper trunnion is provided with a top-fastening mechanism, and the bottom of the lower trunnion is sequentially bolted with a lower stationary contact and a lower terminal block. Grooves are formed on both sides of the outer surface of the lower stationary contact, and a driving mechanism is provided on the front side of the lower stationary contact. A fusing mechanism is provided inside the lower stationary contact, including a fuse tube located on one side of the lower stationary contact. A support assembly for use with the lower stationary contact is provided on one side of the bottom end of the fuse tube. The support assembly includes a support rod rotatably connected within the groove, and a gear is fixedly connected to one end of the support rod. The driving mechanism includes a fixed frame fixedly connected to the front side of the lower stationary contact. An arc-shaped support plate is fixedly connected to the bottom of the fixed frame. A limit frame is fixedly connected inside the fixed frame. A push plate is slidably connected inside the limit frame. The push plate is racetrack-shaped, with a locking tooth on one side of its inner wall that meshes with a gear, and a smooth plate on the other side. Slider blocks are fixedly connected to both sides of the bottom of the push plate, and a limit sleeve is fixedly connected to one side of the bottom of the push plate. By pushing the push plate, the locking gear is rotated, which in turn drives the support rod to rotate, thus causing the fuse tube to rotate around the support rod as the axis to complete the closing.

[0008] As a further aspect of the present invention: the fuse mechanism further includes a fuse cap and a support cap respectively threaded to the top and bottom of the fuse tube; a first sleeve is fixedly connected to the bottom end of the outer circular surface of the fuse tube; the support assembly includes a suspension bracket fixedly connected to the outer surface of the first sleeve; a support rod is fixedly connected inside the suspension bracket; a fuse spring is hinged at the middle of the outer circular surface of the support rod; and a limiting seat for auxiliary support of the support rod is fixedly connected to the front side of the lower stationary contact.

[0009] As a further aspect of the present invention: a current-carrying plate is provided at the top open end of the fuse tube, and the fuse cap is threadedly connected to the top of the fuse tube and presses and fixes the current-carrying plate to the top open end of the fuse tube; a copper wire is fixedly connected to the bottom of the current-carrying plate, and a second sleeve is fixedly connected to the top of the fuse tube, and a sliding rod is fixedly connected inside the second sleeve; a guide mechanism is also provided on one side of the ceramic insulator for use with the drive mechanism, and the sliding rod guides the fuse tube to complete the closing.

[0010] As a further embodiment of the present invention: the top buckle mechanism includes a waterproof cover disposed on the upper surface of the upper trunnion, the top of the waterproof cover is provided with an upper terminal bolted to the upper trunnion, a duckbill is fixedly connected to one side of the bottom of the waterproof cover, and a spring is fixedly connected between the duckbill and the waterproof cover; a support plate is fixedly connected to the other side of the bottom of the waterproof cover, a guide hook is fixedly connected inside the support plate, and an abutment mechanism is provided inside the guide hook.

[0011] As a further aspect of the present invention: the abutting mechanism includes a fixed plate fixedly connected to the middle of the guide hook, an arc-shaped plate is provided on the front side of the fixed plate, a spring No. 2 is connected between the arc-shaped plate and the fixed plate, an arc-shaped groove is provided in the middle of the outer surface of the arc-shaped plate, and a tin sheet is provided on the front side of the arc-shaped plate. Pull ropes are fixedly connected to both sides of the tin sheet, the pull ropes pass through the fixed plate and are tightened and knotted so that the spring No. 2 is in a compressed state.

[0012] As a further aspect of the present invention: the guiding mechanism includes a first arc frame and a second arc frame disposed on one side of the ceramic insulator, the first arc frame and the second arc frame being symmetrically arranged; a first support frame and a second support frame are respectively fixedly connected to the outer surfaces of the first arc frame and the second arc frame; T-blocks are fixedly connected to the front and rear sides of the outer circle of the ceramic insulator, and the first support frame and the second support frame are bolted to the T-blocks; a sleeve is fixedly connected to the inner side of the first support frame, and an insert rod adapted to the sleeve is fixedly connected to the inner side of the second support frame; guide grooves are provided inside the first arc frame and the top of the first arc frame and the second arc frame are provided with sensing mechanisms.

[0013] As a further aspect of the present invention: the sensing mechanism includes an arc-shaped conduit fixedly connected to the top of the first arc-shaped frame; a receiving pipe is fixedly connected to the side of the outer surface of the arc-shaped conduit near the first arc-shaped frame; a sensor lamp is threadedly connected to the inner top of the receiving pipe; a sensor ball is provided at the inner bottom of the receiving pipe; a spring number three is fixedly connected between the sensor ball and the sensor lamp; a sealing plate is fixedly connected to one end of the inner wall of the arc-shaped conduit; a retaining ball is slidably connected to the inner top of the arc-shaped conduit; a blocking pipe is fixedly connected to one side of the outer surface of the retaining ball; a spring number four is fixedly connected between the blocking pipe and the sealing plate.

[0014] As a further aspect of the present invention: the outer diameter of the blocking tube is consistent with the inner diameter of the arc-shaped conduit; a semi-circular groove is provided on the inner top of the ball, and the semi-circular groove is adapted to the ball.

[0015] As a further aspect of the present invention: the distance between the first arc frame and the second arc frame is the same as the length of the sliding rod, and both ends of the sliding rod are hemispherical and are slidably connected to the first arc frame and the second arc frame respectively.

[0016] As a further aspect of the present invention: the bottom of the suspension bracket is also threaded with a bolt rod, and the bolt rod passes through the suspension bracket and is threaded with a nut and a washer; an arc-shaped groove is formed in the middle of the upper surface of the fuse spring.

[0017] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects: (1) This solution sets up a drive mechanism and a fuse mechanism, so that the operator pushes the push plate to make its tooth drive gear rotate, which in turn drives the support rod to rotate, so that the fuse tube moves upward in an arc around the support rod as a fixed axis. The closing trajectory is completely determined by the meshing of the gear and rack and the linear guidance of the limit frame. This achieves precise control and unique repeatability of the closing path, completely replacing the uncontrollable operation of the traditional method of directly hooking and pushing with an insulated operating rod. It eliminates problems such as deviation of the pushing angle, uneven force and slippage caused by the bending of the operating rod and wind swing, thus eliminating the "false closing" phenomenon from the root.

[0018] (2) By setting up a top-locking mechanism and a stop mechanism, the fuse cap lifts the duck tongue when the circuit is closed and is locked by spring No. 1. At the same time, the arc plate presses against the No. 2 sleeve under the action of spring No. 2 to prevent excessive rotation. In case of overcurrent or short circuit fault, the tin sheet is melted to loosen the pull rope and spring No. 2 is released instantly to push the arc plate out, pushing the fuse tube away from the guide hook. Under the assistance of gravity and fuse spring, it falls rapidly with the support rod as the axis. This realizes the stable locking after the circuit is closed and the automatic and reliable tripping under fault conditions. It avoids the burnt contact and line fault caused by poor locking or failure to fall, and significantly improves the stability of the circuit and the reliability of fault tripping.

[0019] (3) By setting a guiding mechanism, which includes a No. 1 arc frame and a No. 2 arc frame symmetrically fixed on the side of the ceramic insulator, and a guide groove matching the closing trajectory is opened inside, so that the two ends of the slide rod slide along the guide groove during closing, forcibly limiting the movement trajectory of the top of the fuse tube, and through the cooperation of the sleeve and the plug rod to enhance the overall rigidity, the mechanical forced guidance of the closing path is realized, completely suppressing the swing of the fuse tube caused by the shaking of the operating rod or the wind force at high altitude, avoiding the slide rod derailment or deviation, thus eliminating the hidden danger of "false closing" from the root, significantly improving the position accuracy and repeatability of closing, and enhancing the vibration resistance stability of the guiding mechanism. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a connection diagram of the top buckle mechanism of the present invention; Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 This is a schematic diagram showing the disassembled structure of the fuse mechanism and the lower stationary contact of the present invention; Figure 5 This is a schematic diagram showing the connection between the fuse mechanism and the drive mechanism of the present invention; Figure 6 This is an internal cross-sectional view of the fuse tube of the present invention; Figure 7 This is a schematic diagram showing the connection between the guiding mechanism and the ceramic insulator of the present invention; Figure 8 This is a schematic diagram of the guiding mechanism of the present invention; Figure 9 This is an internal cross-sectional view of the sensing mechanism of the present invention.

[0022] Figure label: 1. Ceramic insulator; 2. Upper trunnion; 3. Lower trunnion; 4. Top buckle mechanism; 41. Waterproof cover; 42. Duckbill; 43. Spring No. 1; 44. Support plate; 45. Guide hook; 5. Upper terminal block; 6. Counter-mechanism; 61. Fixing plate; 62. Curved plate; 63. Spring No. 2; 64. Solder sheet; 65. Pull rope; 7. Lower stationary contact; 71. Groove; 72. Limit seat; 8. Lower terminal block; 9. Fuse mechanism; 91. Fuse tube; 92. Fuse cap; 93. Support cap; 94. No. 1 sleeve; 95. Suspension bracket; 96. Support rod; 97. Fuse spring; 98. Gear; 10. Conductive plate; 11. Copper wire; 12. No. 2 socket; 13. Slide rod; 14. Drive mechanism; 141. Fixing frame; 142. Arc-shaped support plate; 143. Limiting frame; 144. Push plate; 145. Slider; 146. Limiting sleeve; 15. Guiding mechanism; 151. T-block; 152. Arc-shaped frame No. 1; 153. Arc-shaped frame No. 2; 154. Support frame No. 1; 155. Sleeve; 156. Support frame No. 2; 157. Insert rod; 16. Sensing mechanism; 161. Arc-shaped conduit; 162. Receiving pipe; 163. Induction lamp; 164. Spring No. 3; 165. Induction ball; 166. Sealing plate; 167. Spring No. 4; 168. Blocking pipe; 169. Clamping ball.

[0023] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0024] The present invention provides an outdoor high-voltage drop-out fuse in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0025] like Figures 1 to 9 As shown, this embodiment of the invention provides an outdoor high-voltage drop-out fuse, including a ceramic insulator 1. The upper and lower ends of the ceramic insulator 1 are respectively fixedly connected to an upper trunnion 2 and a lower trunnion 3. The upper surface of the upper trunnion 2 is provided with a top buckling mechanism 4. The bottom of the lower trunnion 3 is bolted with a lower stationary contact 7 and a lower terminal 8. Grooves 71 are provided on both sides of the outer surface of the lower stationary contact 7. A driving mechanism 14 is provided on the front side of the lower stationary contact 7. A fusing mechanism 9 is provided inside the lower stationary contact 7. The fusing mechanism 9 includes a fuse tube 91 provided on one side of the lower stationary contact 7. A support assembly for use with the lower stationary contact 7 is provided on one side of the bottom end of the fuse tube 91. The support assembly includes a support rod 96 rotatably connected in the groove 71. A gear 98 is fixedly connected to one end of the support rod 96. The drive mechanism 14 includes a fixed frame 141 fixedly connected to the front side of the lower stationary contact 7. An arc-shaped support plate 142 is fixedly connected to the bottom of the fixed frame 141. A limit frame 143 is fixedly connected inside the fixed frame 141. A push plate 144 is slidably connected inside the limit frame 143. The push plate 144 is racetrack shaped, and one side of its inner wall is provided with a locking tooth that meshes with the gear 98, while the other side is a smooth plate. Slider blocks 145 are fixedly connected to both sides of the bottom of the push plate 144, and a limit sleeve 146 is fixedly connected to one side of the bottom of the push plate 144. By pushing the push plate 144, the locking gear 98 is rotated, and the gear 98 drives the support rod 96 to rotate, thereby causing the fuse tube 91 to rotate around the support rod 96 as the axis to complete the closing.

[0026] To address the technical problem of existing outdoor high-voltage drop-out fuses during high-altitude closing operations, where the elastic deflection of the insulating operating rod and the swaying of wind at high altitudes make precise control of the closing trajectory difficult, easily leading to "false closing" and consequently poor contact or even burnout of the contacts, this invention solves the problem by employing the aforementioned technical solution. This solution mainly consists of a drive mechanism 14 and a fuse mechanism 9. In use, the operator first inserts a conventional insulating operating rod into the limiting sleeve 146 and manually pushes the push plate 144. Since the push plate 144 is racetrack-shaped, it has teeth on one side of its inner wall and a smooth plate on the other. The push plate 144 is slidably connected within the limiting frame 143, and the sliders 145 on both sides of the bottom and the limiting sleeve 146 together ensure that the push plate 144 moves linearly in a fixed direction. Simultaneously, the arc-shaped support plate 142 is used to... The push plate 144 provides auxiliary support during movement to prevent it from sagging. Therefore, when the push plate 144 is pushed forward, the teeth on its inner wall mesh with the gear 98 fixedly connected to one end of the support rod 96, thereby driving the gear 98 to rotate around its own axis. The gear 98 also drives the support rod 96 to rotate synchronously. Since the support rod 96 is rotatably connected to the grooves 71 on both sides of the lower stationary contact 7, and the support rod 96 also serves as the rotation axis of the bottom end of the fuse tube 91, the rotation of the support rod 96 will cause the fuse tube 91 to move upward in an arc around the support rod 96 as the axis, thus completing the closing action. During this process, the rotation trajectory of the fuse tube 91 is completely determined by the meshing relationship between the gear 98 and the push plate 144 and the linear guidance of the limit frame 143, and will not wobble due to the vibration of the operating lever or wind interference. Through the above operations, the present invention completely replaces the traditional uncontrollable operation method of directly hooking the fuse tube 91 with the insulated operating rod and pushing the stationary contact in by feel. Since the linear motion of the push plate 144 is converted into the fixed-axis rotation of the gear 98, the fuse tube 91 is driven to rotate around the fixed axis (support rod 96) in a constant trajectory. The closing path is unique and highly repeatable, which completely avoids problems such as pushing angle deviation, uneven force and slippage caused by the deflection of the operating rod or wind swing, thus eliminating the "false closing" phenomenon from the root.

[0027] like Figures 1 to 9 As shown, the fuse mechanism 9 also includes a fuse cap 92 and a support cap 93 that are threaded to the top and bottom of the fuse tube 91, respectively. A first sleeve 94 is also fixedly connected to the bottom of the outer surface of the fuse tube 91. The support assembly includes a suspension bracket 95 fixedly connected to the outer surface of the first sleeve 94. A support rod 96 is fixedly connected inside the suspension bracket 95. A fuse spring 97 is hinged at the middle of the outer surface of the support rod 96. A limiting seat 72 for auxiliary support of the support rod 96 is fixedly connected to the front side of the lower stationary contact 7.

[0028] like Figures 1 to 9As shown, a current-carrying piece 10 is provided at the top open end of the fuse tube 91. The fuse cap 92 is threaded to the top of the fuse tube 91 and presses and fixes the current-carrying piece 10 to the top open end of the fuse tube 91. A copper wire 11 is fixedly connected to the bottom of the current-carrying piece 10. A second sleeve 12 is also fixedly connected to the top of the fuse tube 91. A sliding rod 13 is fixedly connected inside the second sleeve 12. A guide mechanism 15 is also provided on one side of the ceramic insulator 1 to cooperate with the drive mechanism 14. The sliding rod 13 guides the fuse tube 91 to complete the closing.

[0029] The operator uses an insulating rod to push a push plate 144, which drives the gear 98 to rotate. Since the gear 98 is fixedly connected to one end of a support rod 96, and the support rod 96 is rotatably connected to the grooves 71 on both sides of the lower stationary contact 7, and simultaneously fixedly connected to the inside of a suspension bracket 95, which is fixedly connected to the bottom of the outer surface of the fuse tube 91 via a first sleeve 94, the rotation of the gear 98 drives the support rod 96 to rotate, which in turn causes the fuse tube 91 to move upwards in an arc around the support rod 96 as its axis. During this process, the limit seat 72 provides auxiliary support to the support rod 96 from below to prevent it from moving axially; the fuse spring 97 is hinged to the middle of the support rod 96 and remains in standby state when closing, to assist in falling in case of failure; at the same time, a slide rod 13 is fixed in the second sleeve 12 at the top of the fuse tube 91, and the slide rod 13 slides in the guide groove of the guide mechanism 15 to guide the top of the fuse tube 91 to move along a preset arc trajectory, ensuring that the electrical contact parts at the top of the fuse tube 91 are accurately in place when closing is completed.

[0030] Specifically, the top open end of the fuse tube 91 is provided with a current-carrying piece 10. The fuse cap 92 is threaded to the top of the fuse tube 91 and presses the current-carrying piece 10 tightly to the top open end of the fuse tube 91, ensuring that the current-carrying piece 10 will not loosen during closing and operation. The bottom of the current-carrying piece 10 is fixedly connected with a copper wire 11. The copper wire 11 passes through the inside of the fuse tube 91 and is connected to the lower stationary contact 7 to form an electrical path. Therefore, when the fuse tube 91 is rotated to the highest position, the current-carrying piece 10 reliably contacts the upper terminal 5 in the top latching mechanism 4 to complete the closing and power supply. Through the aforementioned mechanical transmission and dual guidance (fixed-axis rotation of support rod 96 and sliding engagement between slide rod 13 and guide mechanism 15), the closing path of fuse tube 91 is completely forcibly limited, preventing swaying or slippage due to operating rod vibration or high-altitude wind. Compared to the uncontrollable operation of traditionally relying on the insulated operating rod to directly hook and push fuse tube 91, this invention achieves a high degree of consistency and repeatability of the closing trajectory, fundamentally eliminating the "false closing" phenomenon, ensuring precise engagement of moving and stationary contacts and long-term stable electrical contact, and significantly improving the success rate of high-altitude closing, operational consistency, and power grid operation safety.

[0031] like Figures 1 to 9As shown, the top buckle mechanism 4 includes a waterproof cover 41 on the upper surface of the upper trunnion 2. The top of the waterproof cover 41 is provided with an upper terminal 5 that is bolted to the upper trunnion 2. A duckbill 42 is fixedly connected to one side of the bottom of the waterproof cover 41. A spring 43 is fixedly connected between the duckbill 42 and the waterproof cover 41. A support plate 44 is fixedly connected to the other side of the bottom of the waterproof cover 41. A guide hook 45 is fixedly connected inside the support plate 44. An abutment mechanism 6 is provided inside the guide hook 45.

[0032] like Figures 1 to 9 As shown, the abutment mechanism 6 includes a fixed plate 61 fixedly connected to the middle of the guide hook 45. An arc-shaped plate 62 is provided on the front side of the fixed plate 61. A spring 63 is connected between the arc-shaped plate 62 and the fixed plate 61. An arc-shaped groove is provided in the middle of the outer surface of the arc-shaped plate 62. A tin sheet 64 is provided on the front side of the arc-shaped plate 62. Pull ropes 65 are fixedly connected to both sides of the tin sheet 64. The pull ropes 65 pass through the fixed plate 61 and are tightened and knotted so that the spring 63 is in a compressed state.

[0033] To address the problem that existing outdoor high-voltage drop-out fuses fail to reliably drop out after closing due to insecure engagement or overcurrent faults, leading to contact burnout or delayed line disconnection, a new design is implemented. When the fuse tube 91 rotates and rises to the closing position under the drive mechanism 14 and guide mechanism 15, the conductive piece 10, fixedly pressed against the opening at the top of the fuse tube 91, rises along with it. This conductive piece 10 is threadedly connected to the top of the fuse tube 91 via a fuse cap 92, and is firmly pressed against the opening at the top of the fuse tube 91, ensuring reliable electrical contact. The fuse cap 92... 2. First, it enters the duckbill 42 and pushes it upward. At this time, spring 1 43 is compressed. As the fuse tube 91 continues to rise, after the fuse cap 92 passes the end of the duckbill 42, the duckbill 42 rebounds under the elastic force of spring 1 43, locking the upper surface of the fuse cap 92, achieving mechanical self-locking and preventing the fuse tube 91 from falling off by itself. At the same time, the second sleeve 12, which is fixedly connected to the top of the fuse tube 91, enters the guide hook 45 and pushes the arc plate 62. Because spring 2 63 between the arc plate 62 and the fixed plate 61 is in the initial state... The lower pull rope 65 and solder sheet 64 are tightened and knotted to maintain compression, and the arc-shaped plate 62 is tightly attached to the inside of the guide hook 45. When the slide rod 13 enters, the arc-shaped plate 62 presses against the second sleeve 12 under the elastic restoring force of the second spring 63 to prevent the fuse tube 91 from rotating excessively during the closing process. When an overcurrent or short-circuit fault occurs in the line, the copper wire 11 inside the fuse tube 91 melts, and the fault current flowing through the current-carrying plate 10 and the top latching mechanism 4 will cause the solder sheet 64 to heat up and melt rapidly. After the solder sheet 64 melts, the pull rope 65 loses its restraint and loosens. Spring 63 is instantly released from its compressed state, pushing the arc-shaped plate 62 forward. Its elasticity further pushes the fuse tube 91 away from the guide hook 45. After the fuse tube 91 is disengaged, the locking at the top of the fuse tube 91 is released. Under the assistance of gravity and the fuse spring 97, the fuse tube 91 rapidly rotates downwards around the support rod 96, forming a visible break and completing fault isolation. At this time, the conductive piece 10 fixed to the top of the fuse tube 91 falls along with the fuse tube 91, completely separating from the duckbill 42, ensuring the circuit is completely disconnected. Through the above operation, in a fault state, the tripping is automatically triggered by the thermal melting characteristics of the solder sheet 64 without manual intervention. This ensures that the fuse can fall out promptly and reliably in case of overcurrent or short circuit, thereby protecting the safety of the line and equipment. Compared with the simple structure in the prior art that relies solely on the spring preload, this invention significantly improves the stability of closing and the reliability of fault tripping.

[0034] like Figures 1 to 9As shown, the guiding mechanism 15 includes a first arc frame 152 and a second arc frame 153 located on one side of the ceramic insulator 1, which are symmetrically arranged. A first support frame 154 and a second support frame 156 are fixedly connected to the outer surfaces of the first arc frame 152 and the second arc frame 153, respectively. T-shaped blocks 151 are fixedly connected to the front and rear sides of the outer circle of the ceramic insulator 1, and the first support frame 154 and the second support frame 156 are bolted to the T-shaped blocks 151. A sleeve 155 is fixedly connected to the inner side of the first support frame 154, and an insertion rod 157 adapted to the sleeve 155 is fixedly connected to the inner side of the second support frame 156. Guide grooves are opened inside the first arc frame 152 and the second arc frame 153, and a sensing mechanism 16 is provided at the top of the first arc frame 152 and the second arc frame 153.

[0035] To address the technical problem of existing outdoor high-voltage drop-out fuses during high-altitude closing operations, where the elastic deflection of the insulating operating rod and wind-driven swaying make it difficult to control the closing trajectory, easily leading to "false closing" and consequently poor contact or even burnout of the contacts, the following method is employed: First, the first support frame 154 and the second support frame 156 are respectively fixedly connected to the corresponding T-block 151 with bolts. Simultaneously, the sleeve 155 fixedly connected to the inner side of the first support frame 154 and the insert rod 157 fixedly connected to the inner side of the second support frame 156 are interlocked, thereby symmetrically and securely fixing the first arc-shaped frame 152 and the second arc-shaped frame 153 to the ground. The side of the ceramic insulator 1 ensures the relative positional accuracy between the two arc-shaped frames. Since both the first arc-shaped frame 152 and the second arc-shaped frame 153 have guide grooves inside, and the curvature of these guide grooves matches the movement trajectory of the fuse tube 91 when it closes, when the drive mechanism 14 rotates the fuse tube 91 upwards to close the circuit, the two ends of the slide rod 13, fixed in the second sleeve 12 at the top of the fuse tube 91, extend into the guide grooves of the first arc-shaped frame 152 and the second arc-shaped frame 153, respectively. As the fuse tube 91 rotates, the slide rod 13 slides along the guide groove. Because the guide groove is pre-designed to be arc-shaped, the movement of the slide rod 13... The trajectory is forcibly defined, thereby guiding the top of the fuse tube 91 to move along a preset arc path, ensuring that the conductive plate 10 at the top of the fuse tube 91 can accurately enter the top latching mechanism 4 and form reliable contact with the upper terminal 5 when the closing is completed; at the same time, the top of the first arc frame 152 and the second arc frame 153 are equipped with a sensing mechanism 16, which is used to send a positioning signal when the slide rod 13 slides to the top, indicating to the operator that the closing is completed; in the above operation, the symmetrically arranged first arc frame 152 and second arc frame 153 and their internal guide grooves are used to synchronously and accurately track the two ends of the slide rod 13. The constraint completely suppresses the swaying of the fuse tube 91 during the closing process, avoiding derailment or misalignment of the slide rod 13 caused by the shaking of the operating rod or high-altitude wind. Compared with the existing technology that relies solely on visual alignment of the operating rod, this invention significantly improves the positional accuracy and repeatability of closing by mechanically guiding the closing path, eliminating the hidden danger of "false closing" from the root, and ensuring that the moving and stationary contacts can be accurately engaged every time the closing is completed. In addition, the cooperation between the sleeve 155 and the insertion rod 157 makes the two arc-shaped frames on the left and right sides become a rigid whole, further enhancing the vibration resistance and stability of the guide mechanism 15 and adapting it to harsh outdoor environments.

[0036] like Figures 1 to 9As shown, the sensing mechanism 16 includes an arc-shaped conduit 161 fixedly connected to the top of the first arc-shaped frame 152. A receiving pipe 162 is fixedly connected to the side of the outer surface of the arc-shaped conduit 161 near the first arc-shaped frame 152. A sensor lamp 163 is threadedly connected to the inner top of the receiving pipe 162. A sensor ball 165 is provided at the inner bottom of the receiving pipe 162. A spring 164 is fixedly connected between the sensor ball 165 and the sensor lamp 163. A sealing plate 166 is fixedly connected to one end of the inner wall of the arc-shaped conduit 161. A retaining ball 169 is slidably connected to the inner top of the arc-shaped conduit 161. A blocking pipe 168 is fixedly connected to one side of the outer surface of the retaining ball 169. A spring 167 is fixedly connected between the blocking pipe 168 and the sealing plate 166.

[0037] like Figures 1 to 9 As shown, the outer diameter of the blocking tube 168 is the same as the inner diameter of the arc-shaped conduit 161; the inner top of the ball 169 is provided with a semi-circular groove, and the semi-circular groove is adapted to the ball 169.

[0038] like Figures 1 to 9 As shown, the distance between the first arc frame 152 and the second arc frame 153 is the same as the length of the slide rod 13, and both ends of the slide rod 13 are hemispherical and are slidably connected to the first arc frame 152 and the second arc frame 153 respectively.

[0039] To address the issue that existing outdoor high-voltage drop-out fuses cannot be reliably and visually confirmed after closing, requiring operators to rely on visual inspection or probe with an insulating rod, which can easily lead to misjudgments and undetected "false closing," potentially causing operational accidents, this new design addresses this problem. Firstly, because the distance between the first and second arc-shaped frames 152 and 153 is the same as the length of the sliding rod 13, and the two ends of the sliding rod 13 are hemispherical and slidably connected to the guide grooves of the two arc-shaped frames, when the fuse tube 91 rotates upwards to close the circuit under the drive mechanism 14, the two ends of the sliding rod 13 remain in contact with the inner wall of the guide groove, ensuring stable sliding. When the closing action approaches its end point... At this time, the two ends of the slide rod 13 move to the top of the first arc frame 152 and the second arc frame 153 respectively, and enter the working area of ​​the sensing mechanism 16; when the slide rod 13 continues to slide upward, its hemispherical end just enters the semi-circular groove of the locking ball 169, and pushes the locking ball 169 and the blocking tube 168 to overcome the elastic force of the fourth spring 167 and move inward along the arc-shaped guide tube 161; in the initial state where the locking ball 169 is not pushed, the locking ball 169 is located below the connection between the receiving tube 162 and the arc-shaped guide tube 161, preventing the sensing ball 165 from falling, keeping the third spring 164 compressed, and separating the sensing ball 165 from the sensing lamp 163; and when the locking ball 169 is pushed, the sliding rod 169 moves upward. After the fuse 91 is pushed open by the slide bar 13, the connection port opens, and the sensing ball 165 bounces upward under the elastic force of the spring 164, touching the contact point of the sensing lamp 163. The sensing lamp 163 immediately lights up, sending a clear signal to the operator that the fuse is in the closing position. At this time, the operator can confirm that the fuse 91 has accurately reached the closing position and that the top conductive plate 10 has reliably contacted the upper terminal 5 after observing the sensing lamp 163 lighting up. In the above operation, by using the mechanical linkage between the end of the slide bar 13 and the locking ball 169 during the closing process, the sensing lamp 163 is automatically triggered to light up, providing the operator with intuitive and immediate feedback on the closing position. Compared with existing... In contrast to the uncertainties of relying solely on visual estimation of the engagement length or probes with insulating rods in other technologies, this invention ensures clear prompts for each closing operation, completely avoiding the potential for "false closing" due to misjudgment, and significantly improving the safety and reliability of the closing operation. Simultaneously, the sensor light 163 is threaded into the top of the receiving pipe 162 for easy maintenance and replacement; the ball catcher 169 engages with the hemispherical and semi-circular grooves at the end of the slide rod 13, ensuring a smooth and accurate pushing process; and when the fuse falls due to a malfunction, the slide rod 13 slides downwards, the ball catcher 169 resets under the action of spring 167, and the sensor light 163 automatically turns off, preparing for the next closing operation.

[0040] like Figures 1 to 9 As shown, the bottom of the suspension bracket 95 is also threaded with a bolt rod, and the bolt rod passes through the suspension bracket 95 and is threaded with a nut and a washer; an arc-shaped groove is opened in the middle of the upper surface of the fuse spring 97.

[0041] The configured bolt rod passes through the suspension bracket 95 and is locked by a nut and washer. The cooperation between the bolt rod and the nut allows the copper wire 11 to pass through the cap 93, and after passing through the fuse spring 97, it is wound around the bolt rod. The nut and washer are used to firmly fix the copper wire 11 to the bolt rod and further press the fuse spring 97. Since the fuse spring 97 has an arc-shaped groove in the middle of its upper surface, when the fuse tube 91 falls in a fault state, the support rod 96 rotates, and the fuse spring 97 swings accordingly. The arc-shaped groove can form a more stable contact guide with the outer circle surface of the support rod 96, preventing the fuse spring 97 from sliding laterally during the springing process, ensuring that the fuse tube 91 can fall quickly and smoothly in the preset direction and avoid jamming.

[0042] In use, the operator first inserts the insulating operating rod into the limiting sleeve 146 and pushes the push plate 144. Guided and supported by the limiting frame 143, the slider 145, and the arc-shaped support plate 142, the push plate 144 moves linearly. The teeth on its inner wall mesh with the gear 98, driving the gear 98 to rotate. The gear 98 then drives the support rod 96 to rotate within the groove 71. The support rod 96, through the suspension bracket 95 and the first sleeve 94, drives the fuse tube 91 to move upwards in an arc around the support rod 96 as its axis. The slide bar 13 at the top of the fuse tube 91 slides in the guide groove of the guide mechanism 15, forcibly guiding the top of the fuse tube 91 to move along a preset arc trajectory; when the fuse tube 91 rotates to the highest position, the conductive piece 10 at its top opening, which is pressed and fixed by the fuse cap 92, reliably contacts the upper terminal 5 in the top latching mechanism 4, and forms an electrical path with the lower stationary contact 7 through the copper wire 11, completing the closing and power supply; then, during the closing process, the fuse cap 92 enters the duck tongue 42 and pushes the duck tongue 42 upward, compressing the spring 41. 3; After passing the end of the duckbill 42, the duckbill 42 rebounds under the elastic force of spring 43, locking the upper surface of the fuse cap 92 to achieve mechanical self-locking. At the same time, the second sleeve 12 enters the guide hook 45 and pushes the arc plate 62. The arc plate 62 presses against the second sleeve 12 under the action of the pre-compressed spring 63 to prevent the fuse tube 91 from rotating excessively. When the slide rod 13 moves to the top of the arc frame, its hemispherical end enters the semi-circular groove of the ball catcher 169, pushing the ball catcher 169 and the blocking tube 168 to compress the fourth spring 1. 67 moves inward, opening the connection between the receiving pipe 162 and the arc-shaped conduit 161. The induction ball 165 bounces upward under the elastic force of spring number three 164, touching the contact of the induction lamp 163 to light it up and send a signal to the operator that the circuit is closed. Finally, when an overcurrent or short circuit fault occurs in the line, the copper wire 11 melts, and at the same time, the fault current causes the tin sheet 64 to heat up and melt rapidly. The pull rope 65 is released, and spring number two 63 is released instantly, pushing the arc plate 62 forward and pushing the second sleeve 12 away from the guide hook 45. After the top lock of fuse tube 91 is released, under the assistance of gravity and fuse spring 97, fuse tube 91 quickly rotates downward around support rod 96 and falls. The current transfer piece 10 falls with fuse tube 91 and completely separates from duck tongue 42, forming a visible break and completing fault isolation. At the same time, slide rod 13 slides down, ball 169 is reset under the action of spring 167, and sensor light 163 automatically turns off, preparing for the next closing.

[0043] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An outdoor high-voltage drop-out fuse, comprising a ceramic insulator (1), wherein an upper trunnion (2) and a lower trunnion (3) are respectively fixedly connected to the upper and lower ends of the ceramic insulator (1); characterized in that, The upper surface of the upper trunnion (2) is provided with a top buckle mechanism (4), and the bottom of the lower trunnion (3) is bolted with a lower stationary contact (7) and a lower terminal (8). Grooves (71) are provided on both sides of the outer surface of the lower stationary contact (7), and a drive mechanism (14) is provided on the front side of the lower stationary contact (7). A fuse mechanism (9) is provided inside the lower stationary contact (7). The fuse mechanism (9) includes a fuse tube (91) located on one side of the lower stationary contact (7). A support assembly for use with the lower stationary contact (7) is provided on one side of the bottom end of the fuse tube (91). The support assembly includes a support rod (96) rotatably connected in the groove (71). A gear (98) is fixedly connected to one end of the support rod (96). The drive mechanism (14) includes a fixed frame (141) fixedly connected to the front side of the lower stationary contact (7). An arc-shaped support plate (142) is fixedly connected to the bottom of the fixed frame (141). A limit frame (143) is fixedly connected inside the fixed frame (141). A push plate (144) is slidably connected inside the limit frame (143). The push plate (144) is in the shape of a racetrack, and one side of its inner wall is provided with a locking tooth that meshes with a gear (98), while the other side is a smooth plate. Slider blocks (145) are fixedly connected to both sides of the bottom of the push plate (144), and a limit sleeve (146) is fixedly connected to one side of the bottom of the push plate (144). By pushing the push plate (144), the tooth drive gear (98) rotates, and the gear (98) drives the support rod (96) to rotate, thereby making the fuse tube (91) rotate around the support rod (96) to complete the closing.

2. The outdoor high-voltage drop-out fuse according to claim 1, characterized in that, The fuse mechanism (9) also includes a fuse cap (92) and a support cap (93) that are threaded to the top and bottom of the fuse tube (91) respectively. The bottom end of the outer circle of the fuse tube (91) is also fixedly connected to a first sleeve (94). The support assembly includes a suspension bracket (95) fixedly connected to the outer surface of the first sleeve (94). A support rod (96) is fixedly connected inside the suspension bracket (95). A fuse spring (97) is hinged at the middle of the outer circle of the support rod (96). A limiting seat (72) for auxiliary support of the support rod (96) is fixedly connected to the front side of the lower stationary contact (7).

3. The outdoor high-voltage drop-out fuse according to claim 2, characterized in that, The top opening of the fuse tube (91) is provided with a current-carrying piece (10). The fuse cap (92) is threaded to the top of the fuse tube (91) and presses the current-carrying piece (10) to the top opening of the fuse tube (91). A copper wire (11) is fixedly connected to the bottom of the current-carrying piece (10). A second sleeve (12) is also fixedly connected to the top of the fuse tube (91). A sliding rod (13) is fixedly connected inside the second sleeve (12). A guide mechanism (15) is also provided on one side of the ceramic insulator (1) to cooperate with the drive mechanism (14). The sliding rod (13) guides the fuse tube (91) to complete the closing.

4. An outdoor high-voltage drop-out fuse according to claim 3, characterized in that, The top buckle mechanism (4) includes a waterproof cover (41) on the upper surface of the upper trunnion (2). The top of the waterproof cover (41) is provided with an upper terminal (5) that is bolted to the upper trunnion (2). A duck tongue (42) is fixedly connected to one side of the bottom of the waterproof cover (41). A spring (43) is fixedly connected between the duck tongue (42) and the waterproof cover (41). A support plate (44) is fixedly connected to the other side of the bottom of the waterproof cover (41). A guide hook (45) is fixedly connected inside the support plate (44). An abutment mechanism (6) is provided inside the guide hook (45).

5. An outdoor high-voltage drop-out fuse according to claim 4, characterized in that, The abutment mechanism (6) includes a fixed plate (61) fixedly connected to the middle of the guide hook (45). The front side of the fixed plate (61) is provided with an arc plate (62). The arc plate (62) and the fixed plate (61) are connected together with a second spring (63). An arc groove is provided in the middle of the outer surface of the arc plate (62), and a tin sheet (64) is provided on the front side of the arc plate (62). Pull ropes (65) are fixedly connected to both sides of the tin sheet (64). The pull ropes (65) pass through the fixed plate (61) and are tightened and knotted so that the second spring (63) is in a compressed state.

6. An outdoor high-voltage drop-out fuse according to claim 5, characterized in that, The guiding mechanism (15) includes a first arc frame (152) and a second arc frame (153) located on one side of the ceramic insulator (1), and the first arc frame (152) and the second arc frame (153) are symmetrically arranged; the outer surfaces of the first arc frame (152) and the second arc frame (153) are respectively fixedly connected to a first support frame (154) and a second support frame (156), and T-shaped blocks (151) are fixedly connected to the front and rear sides of the outer circle of the ceramic insulator (1), and the first support frame (154) The second support frame (156) is bolted to the T-block (151); the inner side of the first support frame (154) is fixedly connected to a sleeve (155), and the inner side of the second support frame (156) is fixedly connected to a plug rod (157) that is compatible with the sleeve (155); the first arc frame (152) and the second arc frame (153) are both provided with guide grooves, and the top of the first arc frame (152) and the second arc frame (153) are both provided with sensing mechanisms (16).

7. An outdoor high-voltage drop-out fuse according to claim 6, characterized in that, The sensing mechanism (16) includes an arc-shaped conduit (161) fixedly connected to the top of the first arc-shaped frame (152). A receiving pipe (162) is fixedly connected to the side of the outer surface of the arc-shaped conduit (161) near the first arc-shaped frame (152). A sensor lamp (163) is threadedly connected to the inner top of the receiving pipe (162). A sensor ball (165) is provided at the inner bottom of the receiving pipe (162). A spring (164) is fixedly connected between the sensor ball (165) and the sensor lamp (163). A sealing plate (166) is fixedly connected to one end of the inner wall of the arc-shaped conduit (161). A locking ball (169) is slidably connected to the inner top of the arc-shaped conduit (161). A blocking pipe (168) is fixedly connected to one side of the outer surface of the locking ball (169). A spring (167) is fixedly connected between the blocking pipe (168) and the sealing plate (166).

8. An outdoor high-voltage drop-out fuse according to claim 7, characterized in that, The outer diameter of the blocking tube (168) is the same as the inner diameter of the arc-shaped conduit (161); the inner top of the ball (169) is provided with a semi-circular groove, and the semi-circular groove is adapted to the ball (169).

9. An outdoor high-voltage drop-out fuse according to claim 7, characterized in that, The distance between the first arc frame (152) and the second arc frame (153) is the same as the length of the slide rod (13), and both ends of the slide rod (13) are hemispherical and are slidably connected to the first arc frame (152) and the second arc frame (153) respectively.

10. An outdoor high-voltage drop-out fuse according to claim 2, characterized in that, The bottom of the suspension bracket (95) is also threaded with a bolt rod, and the bolt rod passes through the suspension bracket (95) and is threaded with a nut and a washer; an arc-shaped groove is opened in the middle of the upper surface of the fuse spring (97).

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