Rotary fusible core tripping assembly

Abstract

The utility model relates to a rotary fusible core tripping assembly, which comprises a fixed seat, a rotating seat, a lock assembly and a fusible core clamp, two side plates of the rotating seat are movably connected with the fixed seat through the lock assembly, a top plate of the rotating seat is fixedly connected with the fusible core clamp and a flexible connector, the two side plates of the fixed seat are respectively provided with an arc-shaped hole, two ends of each arc-shaped hole are provided with round holes, and the round holes are connected with the lock assembly. The diameter of the circular hole is larger than the width of the arc-shaped hole, the rotating seat is arranged between the two side plates of the fixed seat, the lock assembly comprises a spacer bush, a spring and two telescopic pins, the spacer bush is arranged between the two side plates of the rotating seat, the spring is arranged in the spacer bush, the two telescopic pins are arranged at the two ends of the spacer bush respectively, and the telescopic pins can move in a telescopic mode relative to the spacer bush. The end of the telescopic pin sequentially penetrates through the through hole in the rotating seat and the round hole in the fixed seat and extends to the outer side of the side plate of the fixed seat, and three cylindrical step faces are arranged on the telescopic pin. According to the rotary fusible core tripping assembly provided by the utility model, the fusible core can be quickly assembled and disassembled; and the fusible core can be assembled more stably.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, and in particular to a rotary fuse tripping assembly. Background Technology

[0002] A high-voltage load switch is an electrical device whose function falls between that of a high-voltage circuit breaker and a high-voltage disconnector. It is often used in series with a high-voltage fuse to control power transformers. A high-voltage load switch has a simple arc-extinguishing device, thus it can switch on and off certain load currents and overload currents. However, it cannot interrupt short-circuit currents, so it is generally used in series with a high-voltage fuse for short-circuit protection.

[0003] A fuse is a simple overload and short-circuit protection device. When the current exceeds a predetermined value, the fuse wire melts, causing the fuse components to detach and remove the faulty part from the circuit. It is usually used in conjunction with a load switch to provide overload and short-circuit protection. After the circuit fault is repaired, the fuse wire needs to be replaced. In the prior art, fuses are usually housed in a solid insulating cylinder, which provides insulation protection for the fuse. For example, patent CN205944005U discloses a 24KV solid-insulated fuse element. The disadvantage of this type of fuse is that it is inconvenient to replace the fuse element after the fuse wire melts.

[0004] Patent CN104577857A discloses a fully insulated and sealed solid-state fuse box core. This design uses a limiting bracket for support and guidance. The fuse core is mounted on the limiting bracket and then inserted into a solid-state insulating cylinder. The limiting bracket includes a support frame with fuse clips and locking springs at both ends. A conductive block electrically connected to the inlet port is also provided at the end of the limiting bracket facing the fuse core cover assembly. The fuse clip at the end of the limiting bracket facing the fuse core cover assembly is electrically connected to the cable inside the outlet cable conduit via a contact head. A fuse core cover assembly is also provided to seal the fuse core within the solid-state insulating cylinder. The disadvantage of this design is that it requires fuse clips, locking springs, and conductive blocks at both ends of the limiting bracket, and the fuse core cover assembly is needed to completely enclose it within the solid-state insulating cylinder, making the fuse core structure complex and cumbersome to assemble and disassemble. Therefore, improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to address the problem of inconvenient fuse replacement in existing rotary fuse tripping assemblies described in the background art, and to provide a rotary fuse tripping assembly that can solve the aforementioned problem.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rotary fuse release assembly, comprising a fixed base, a rotating base, a locking assembly, and a fuse clamp. The two side plates of the rotating base are movably connected to the fixed base via the locking assembly. The top plate of the rotating base is fixedly connected to the fuse clamp and a flexible connection. The two side plates of the fixed base are respectively provided with arc-shaped holes, and the ends of the arc-shaped holes are provided with round holes, the diameter of which is larger than the width of the arc-shaped holes. The rotating base is positioned between the two side plates of the fixed base. The locking assembly includes a spacer, a spring, and a telescopic pin. The spacer is positioned between the two side plates of the rotating base, and the spring is positioned between the spacer... Inside the sleeve, two telescopic pins are respectively set at both ends of the spacer. The telescopic pins can extend and retract relative to the spacer. The ends of the telescopic pins pass through the through holes on the rotating seat and the round holes on the fixed seat in sequence, and extend to the outside of the side plate of the fixed seat. The telescopic pins are provided with three cylindrical stepped surfaces. The diameter of the first stepped surface is adapted to the inner diameter of the spacer and is larger than the diameter of the through hole on the rotating seat. The diameter of the second stepped surface is adapted to the diameter of the through hole on the rotating seat and is adapted to the diameter of the round holes at both ends of the arc-shaped hole on the fixed seat. The diameter of the third stepped surface is adapted to the width of the arc-shaped hole on the fixed seat.

[0007] In the above scheme, the fusible core clamp includes a base plate, clamping plates, and a locking clamp. There are two clamping plates, which are respectively disposed on both sides of the base plate. Each clamping plate has an arc-shaped portion in its middle corresponding to the cylindrical terminal on the fusible core. The arc-shaped portions on the two clamping plates are arranged opposite each other. The locking clamp includes a horizontal bar and two vertical bars. The two vertical bars are respectively disposed on the outer sides of the two clamping plates, and their lower ends are rotatably connected to the two clamping plates. The two ends of the horizontal bar are connected to the upper ends of the two vertical bars. The horizontal bar can rotate to the top of the two clamping plates to lock them in place, thus clamping the cylindrical terminal of the fusible core. With this arrangement, the fusible core clamp can axially and radially limit the outer end of the fusible core, ensuring a stable connection between the fusible core and the insulating shell.

[0008] In the above scheme, the clamping plate is an elastic metal plate. The lower part of the clamping plate is a straight plate, and the lower end of the straight plate is integrally formed and connected to the base plate. The upper part of the straight plate has a concave surface extending inward toward the core clamp. Above the concave surface is an arc-shaped part, the diameter of which corresponds to the diameter of the cylindrical terminal at the end of the core. Above the arc-shaped part is a pressure part that bends and extends outward toward the core clamp. With this arrangement, when positioning the core, the cylindrical terminal at the end of the core is inserted into the area between the arc-shaped parts on the two clamping plates, and the two clamping plates can clamp the cylindrical terminal. Then, the locking clamp is rotated to the top of the clamping plates, and pressure is applied to the pressure part by the locking clamp, so that the arc-shaped part clamps the cylindrical terminal, thereby achieving axial and radial positioning of the core.

[0009] In the above solution, the telescopic pin includes a pin sleeve and a bolt. The inner hole of the pin sleeve has an internal thread, and the bolt is threadedly connected to the pin sleeve. The outer wall of the pin sleeve has the first stepped surface, the second stepped surface, and the third stepped surface. This arrangement facilitates the assembly of the fixed seat, the rotating seat, and the locking assembly.

[0010] In the above design, a conductive plate mounting base is provided on the front side of the rotating seat, and the conductive plate is rotatably connected to the conductive plate mounting base. This arrangement facilitates the assembly of the conductive plate.

[0011] This invention has the following positive effects: The rotary fuse release assembly of this invention simplifies the assembly and disassembly of the fuse, enabling rapid assembly and disassembly of the fuse; by setting a locking assembly, the position of the rotating seat can be made more stable, and the fuse clamp can provide stable axial and radial limiting of the fuse, making the assembly of the fuse more stable. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the rotary fuse tripping assembly of this utility model.

[0013] Figure 2 This is a schematic diagram of the connection structure between the core clamp and the core of this utility model.

[0014] Figure 3 This is a schematic diagram of the connection structure between the fixed base and the rotating base of this utility model.

[0015] Figure 4 This is a cross-sectional structural diagram of the lock assembly, the fixed seat, and the rotating seat.

[0016] The reference numerals in the figure are as follows: 1. Fusible core, 11. Cylindrical terminal, 12. Top rod, 2. Fixing seat, 21. Arc hole, 22. Round hole, 23. Rear side plate, 24. Side plate, 3. Rotating seat, 3. Top plate, 31. Side plate, 32. Locking assembly, 4. Spacer, 41. Spring, 42. Telescopic pin, 43. Pin sleeve, 431. Bolt, 432. First step surface, 433. Second step surface, 434. Third step surface, 435. Fusible core clamp, 5. Base plate, 51. Clamping plate, 52. Straight plate, 521. Concave surface, 522. Arc part, 523. Pressurizing part, 524. Locking clamp, 53. Conductive plate, 6. Conductive plate assembly seat, 61. Flexible connection, 7. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] like Figure 1-4 The rotary fuse release assembly shown includes a fixed base 2, a rotating base 3, a locking assembly 4, and a fuse clamp 5.

[0019] like Figure 1 and 3 As shown, the mounting base 2 is made of conductive material. The mounting base 2 includes a rear side plate 23 and side plates 24 disposed on both sides of the rear side plate 23. The side plates 24 are integrally formed with the rear side plate 23. The rear side plate 23 of the mounting base 2 is fixedly connected to the tail end face of the high-voltage load switch pole. Arc-shaped holes 21 are provided on the side plates 24 on both sides, and round holes 22 are provided at both ends of the arc-shaped holes 21. The diameter of the round holes 22 is larger than the width of the arc-shaped holes 21.

[0020] The rotating base 3 includes a top plate 31 and two side plates 32 located below the top plate 31. The top plate 31 is used to connect the core clamp 5. The bottom plate of the core clamp 5 and the flexible connection 7 are fixedly connected to the top plate 31 of the rotating base 3 by bolts.

[0021] The rotating seat 3 is located between the two side plates 24 of the fixed seat 2, and the rotating seat 3 achieves rotational engagement with the fixed seat 2 through the locking assembly 4.

[0022] like Figure 4 As shown, the lock assembly 4 includes a spacer 41, a spring 42, and telescopic pins 43. The spacer 41 is disposed between the two side plates 32 of the rotating seat 3. The spring 42 is disposed inside the spacer 41. Two telescopic pins 43 are respectively disposed at both ends of the spacer 41. The telescopic pins 43 can extend and retract relative to the spacer 41. The ends of the telescopic pins 43 pass through the through holes on the rotating seat 3 and the circular holes 22 on the fixed seat 2, and extend to the outside of the side plate 24 of the fixed seat 2. The telescopic pins 43 are provided with three cylindrical steps. The three cylindrical stepped surfaces are the first stepped surface 433, the second stepped surface 434, and the third stepped surface 435. The diameter of the first stepped surface 433 is adapted to the inner diameter of the spacer 51 and is larger than the diameter of the through hole on the rotating seat 3. The diameter of the second stepped surface 434 is adapted to the diameter of the through hole on the rotating seat 3 and is adapted to the diameter of the round holes 22 at both ends of the arc hole 21 on the fixed seat 2. The diameter of the third stepped surface 435 is adapted to the width of the arc hole 21 on the fixed seat 2.

[0023] The structure of the telescopic pin 43 can be selected according to needs. For example, it can be a single metal piece, or the telescopic pin 43 can include a pin sleeve 431 and a bolt 432. The inner hole of the pin sleeve 431 is provided with an internal thread, and the bolt 432 is threadedly connected to the pin sleeve 431. The outer wall of the pin sleeve 431 is provided with the first stepped surface 433, the second stepped surface 434, and the third stepped surface 435. This arrangement facilitates the assembly of the fixed seat 2, the rotating seat 3, and the locking assembly 4.

[0024] like Figure 2As shown, the fuse clamp 4 includes a base plate 51, clamping plates 52, and a locking clamp 53. There are two clamping plates 52, respectively disposed on both sides of the base plate 51. Each clamping plate 52 has an arc-shaped portion 523 in its middle section, corresponding to the cylindrical terminal 11 on the fuse 1. The arc-shaped portions 523 on the two clamping plates 52 are arranged opposite each other. The locking clamp 53 includes a horizontal bar and two vertical bars. The two vertical bars are respectively disposed on the outer sides of the two clamping plates 52, with their lower ends rotatably connected to the two clamping plates 52. The two ends of the horizontal bar are connected to the upper ends of the two vertical bars. The horizontal bar can rotate to the top of the two clamping plates 52 to lock them in place, thus clamping the cylindrical terminal 11 of the fuse 1. Through this arrangement, the fuse clamp 5 can axially and radially limit the outer end of the fuse 1, ensuring a stable connection between the fuse 1 and the insulating shell of the electrode post.

[0025] like Figure 2 As shown, the clamping plate 52 can be made of elastic metal plate. The lower part of the clamping plate 52 is a straight plate 521. The lower end of the locking clamp 53 is rotatably connected to the straight plate 521. The lower end of the straight plate 521 is integrally formed and connected to the base plate 51. The upper part of the straight plate 521 is provided with a concave surface 522 towards the inside of the fusion core clamp. Above the concave surface 522 is an arc-shaped part 523. The diameter of the arc-shaped part 523 corresponds to the diameter of the cylindrical terminal 11 at the end of the fusion core 1. Above the arc-shaped part 523 is a pressure part 524 that bends and extends towards the outside of the fusion core clamp. With this setup, when positioning the molten core, the cylindrical terminal 11 at the end of the molten core 1 is inserted into the area between the arcuate portions 523 on the two clamping plates 52. The two clamping plates 523 can then clamp the cylindrical terminal 11. The locking clamp 53 is then rotated to the top of the clamping plates 52. Pressure is applied to the pressing portion 524 by the locking clamp 53, which causes the arcuate portion 523 to clamp the cylindrical terminal 11, thereby achieving axial and radial positioning of the molten core 1.

[0026] like Figure 1 As shown, a conductive plate mounting base 61 is provided on the front side of the rotating base 3, and a conductive plate 6 is mounted on the conductive plate mounting base. The conductive plate 6 is rotatably connected to the conductive plate mounting base 61. This arrangement facilitates the assembly of the conductive plate 6. The position of the conductive plate 6 matches the cylindrical terminal 11 of the fuse core 1. Under normal circuit operation, the conductive plate 6 and the cylindrical terminal 11 at the end of the fuse core are in contact and conductive state. When the circuit is overloaded, the fuse wire in the fuse core 1 melts, and at the same time, the push rod 12 in the fuse core 1 pushes out from the cylindrical terminal 11, separating the conductive plate 6 from the cylindrical terminal 11 and breaking the circuit between them.

[0027] In this utility model, the rotary fuse release assembly allows for the following steps during fuse assembly: First, push the telescopic pins at both ends of the lock assembly to retract them into the spacer. This causes the third step surface of the telescopic pin to move to the position opposite the circular hole on the fixed seat. Because the diameter of the third step surface matches the width of the arc-shaped hole on the fixed seat, the third step surface can slide along the arc-shaped hole from the upper circular hole position to the lower circular hole position. Simultaneously, the rotating seat rotates downward relative to the fixed seat, causing the fuse clamp to rotate downward. Once the rotation is complete, release the telescopic pin. The telescopic pin extends under the action of the spring inside the spacer, allowing the second step surface on the telescopic pin to enter the circular hole at the lower end of the arc-shaped hole. Because the diameter of the second step surface is larger than the diameter of the arc-shaped hole, the telescopic pin cannot rotate along the arc-shaped hole, thus locking the rotating seat. At this point, the fuse can be inserted into the inner hole of the load switch pole. Push the fuse so that its inner end engages with the perforated contact inside the pole. After engagement, push the telescopic pin to retract it into the spacer, moving the third step of the pin to the position opposite the circular hole on the fixed seat. In the opposite direction, push the rotating seat upward, simultaneously moving the locking assembly upward into the circular hole at the upper end of the arc-shaped hole. The rotating seat is now in position. Release the telescopic pin, and its second step pops out and enters the circular hole at the upper end of the arc-shaped hole, locking the rotating seat again. When the rotating seat is in position, the fuse clamp is locked to the cylindrical terminal at the outer end of the fuse. Push the locking clamp on the fuse clamp upward to lock the two clamping plates, achieving axial and radial positioning of the fuse and completing the assembly. The conductive plate on the mounting bracket can then be rotated upward to engage with the cylindrical terminal at the outer end of the fuse, making the circuit between them continuous. When removing the fuse, first rotate the locking clip on the fuse holder downwards to loosen it. Then, following the method described above, rotate the rotating seat downwards until it is in place. Remove the fuse from the load switch terminal and replace it with a new fuse. Then, rotate the rotating seat upwards again until it is in place, and finally, use the fuse holder to clamp the cylindrical terminal at the end of the fuse. This completes the replacement of the fuse.

[0028] The rotary fuse tripping assembly of this invention enables rapid assembly and disassembly of the fuse core, and allows for stable axial and radial positioning of the fuse core during assembly, ensuring the stability of the circuit connection.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the scope and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary fuse tripping assembly, characterized in that: The device includes a fixed base, a rotating base, a locking assembly, and a fusible core clamp. The two side plates of the rotating base are movably connected to the fixed base via the locking assembly. The top plate of the rotating base is fixedly connected to the fusible core clamp and a flexible connector. Each side plate of the fixed base has an arc-shaped hole, with round holes at both ends of the arc-shaped holes. The diameter of the round holes is larger than the width of the arc-shaped holes. The rotating base is positioned between the two side plates of the fixed base. The locking assembly includes a spacer, a spring, and two telescopic pins. The spacer is positioned between the two side plates of the rotating base, the spring is positioned inside the spacer, and the two telescopic pins are positioned at both ends of the spacer. The telescopic pin can extend and retract relative to the spacer. The ends of the telescopic pin pass through the through hole on the rotating seat and the round hole on the fixed seat in sequence, and extend to the outside of the side plate of the fixed seat. The telescopic pin is provided with three cylindrical stepped surfaces. The diameter of the first stepped surface is adapted to the inner diameter of the spacer and is larger than the diameter of the through hole on the rotating seat. The diameter of the second stepped surface is adapted to the diameter of the through hole on the rotating seat and the diameter of the round holes at both ends of the arc-shaped hole on the fixed seat. The diameter of the third stepped surface is adapted to the width of the arc-shaped hole on the fixed seat.

2. The rotary fuse tripping assembly according to claim 1, characterized in that: The fused core clamp includes a base plate, clamping plates, and a locking clamp. There are two clamping plates, which are respectively located on both sides of the base plate. Each clamping plate has an arc-shaped portion in its middle that corresponds to the cylindrical terminal on the fused core. The arc-shaped portions on the two clamping plates are arranged opposite each other. The locking clamp includes a horizontal bar and two vertical bars. The two vertical bars are respectively located on the outside of the two clamping plates. The lower ends of the two vertical bars are rotatably connected to the two clamping plates. The two ends of the horizontal bar are respectively connected to the upper ends of the two vertical bars. The horizontal bar can rotate to the top of the two clamping plates to lock the two clamping plates, so that the two clamping plates clamp the cylindrical terminal of the fused core.

3. The rotary fuse tripping assembly according to claim 2, characterized in that: The clamping plate is an elastic metal plate. The lower part of the clamping plate is a straight plate, and the lower end of the straight plate is integrally formed and connected to the base plate. The upper part of the straight plate is a concave surface extending inward toward the core clamp. Above the concave surface is an arc-shaped part, the diameter of which corresponds to the diameter of the cylindrical terminal at the end of the core. Above the arc-shaped part is a pressure part that bends and extends outward toward the core clamp.

4. The rotary fuse tripping assembly according to claim 1, characterized in that: The telescopic pin includes a pin sleeve and a bolt. The inner hole of the pin sleeve is provided with an internal thread, and the bolt is threadedly connected to the pin sleeve. The outer wall of the pin sleeve is provided with the first step surface, the second step surface and the third step surface.

5. The rotary fuse tripping assembly according to claim 1, characterized in that: The front side of the rotating seat is provided with a conductive plate assembly seat, and the conductive plate is rotatably connected to the conductive plate assembly seat.

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