40.5 kV semi-solid-sealed load switch pole

Abstract

The utility model relates to a 40.5 kV semi-solid-sealed load switch pole, which comprises an insulating shell, an arc extinguish chamber, a fusible core and a rotary fusible core tripping assembly, one end of the insulating shell is a complete solid-sealed part, the other end of the insulating shell is a fuse cylinder part, the arc extinguish chamber is arranged in the complete solid-sealed part, one part of the fusible core is arranged in the complete solid-sealed part, and the other part of the fusible core is arranged in the rotary fusible core tripping assembly. The other part of the fusible core is arranged on the fuse cylinder part, the rotary fusible core tripping assembly is arranged at the tail end of the fuse cylinder part and comprises an installation frame and a fusible core clamp, the installation frame is fixedly connected to the end face of the fuse cylinder part, the fusible core clamp and the flexible connecting piece are connected to the installation frame, a conductive plate is further arranged on the installation frame, and the conductive plate is connected with the fusible core clamp. The current-conducting plate is connected with the mounting rack in a running fit manner, and the position of the current-conducting plate is matched with the cylindrical terminal of the fusible core. The 40.5 kV semi-solid-sealed load switch pole provided by the utility model can realize rapid assembly and disassembly of the fusible core.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of switchgear, in particular to a 40.5kV semi -enclosed load switch pole. BACKGROUND

[0002] High-voltage load switch is a kind of electrical appliance between high-voltage circuit breaker and high-voltage disconnecting switch, and it is usually used in series with high-voltage fuse; it is used for controlling power transformer. High-voltage load switch has simple arc extinguishing device, so it can pass through certain load current and overload current. However, it cannot disconnect short-circuit current, so it is usually used in series with high-voltage fuse, and short-circuit protection is realized by means of fuse.

[0003] Fuse is a kind of simple overload and short-circuit protection device, when the current exceeds the predetermined value, the fuse will melt, causing the components of the fuse to fall off, thereby removing the fault part from the circuit, and it is usually used in combination with load switch to provide overload and short-circuit protection, and the fuse in the fuse needs to be replaced after the circuit is repaired. In the prior art, the fuse is usually arranged in a solid sealing insulating cylinder, and the fuse is insulated and protected by the insulating cylinder. For example, the patent with publication number CN205944005U discloses a 24KV solid sealing fuse core. The disadvantage of this fuse is that it is not convenient to replace the fuse core when the fuse of the fuse melts.

[0004] The patent with publication number CN104577857A discloses a fully insulated and fully sealed solid cabinet fuse core. In this scheme, a limiting bracket is used for support and guidance, the fuse core is installed on the limiting bracket, and then is arranged in a solid sealing insulating cylinder. The limiting bracket includes a support, fuse clamps and locking springs are arranged at both ends of the support, and a conductive block electrically connected with the incoming line port is arranged at one end of the limiting bracket facing the incoming line port. The fuse clamp at one end of the limiting bracket facing the fuse cover assembly is electrically connected with the cable in the outgoing cable sleeve through a connecting contact, and a fuse cover assembly is further arranged to seal the fuse core in the solid sealing insulating cylinder. The disadvantage of this scheme is that the fuse clamps, locking springs and conductive blocks are arranged at both ends of the limiting bracket, and the fuse cover assembly is also used to completely seal the fuse core in the solid sealing insulating cylinder, so that the structure of the fuse core is complex and the disassembly and assembly are complicated, and thus it needs to be improved. SUMMARY

[0005] The utility model discloses to the 40.5kV semi -enclosed load switch pole of prior art in background art, the problem of inconvenient replacement of fuse core, provide a kind of 40.5kV semi -enclosed load switch pole of being able to solve the foregoing problem.

[0006] To achieve the above object, the utility model discloses a 40.5kV half solid -sealed load switch pole, including insulating shell, arc extinguishing chamber, fuse core and rotary fuse core tripping assembly, one end of insulating shell is completely solid -sealed part, the other end is fuse cylinder part, arc extinguishing chamber sets up in completely solid -sealed part, one part of fuse core sets up in completely solid -sealed part, another part of fuse core sets up in fuse cylinder part, rotary fuse core tripping assembly sets up in the tail end of fuse cylinder part, rotary fuse core tripping assembly includes mounting bracket and fuse core clamp, mounting bracket fixedly connected on the end face of fuse cylinder part, fuse core clamp and soft connecting piece are connected on mounting bracket, still be equipped with conducting board on mounting bracket, and conducting board is rotatably connected with mounting bracket, and the position of conducting board is matched with the cylindrical terminal of fuse core.

[0007] In the above scheme, the mounting bracket includes a fixed seat, a rotating seat and a lock assembly, the fixed seat is fixedly connected to the end face of the fuse cylinder part, the two side plates of the rotating seat are movably connected to the fixed seat through the lock assembly, the rotating seat is arranged between the two side plates of the fixed seat, and the top plate of the rotating seat is fixedly connected to the fuse core clamp and the soft connection. Through this arrangement, the rotating seat can rotate relative to the fixed seat, and the fuse core clamp can rotate with it. When the fuse core clamp is rotated to be clamped with the external terminal of the fuse core, the fuse core can be positioned, and the fuse core can be fixed on the insulating shell. When the fuse core clamp is rotated to be separated from the external terminal of the fuse core, the fuse core is released from the positioning, and the fuse core can be extracted from the insulating shell. The lock assembly is used to rotate and lock the rotating seat. When the fuse core clamp is positioned on the fuse core, the rotating seat is locked. When the lock is released, the rotating seat can rotate relative to the fixed seat, so that the fuse core clamp releases the positioning of the fuse core.

[0008] In the above scheme, the rear side plate of the fixed seat is fixedly connected to the end face of the fuse cylinder part, and the two side plates of the fixed seat are respectively provided with arc-shaped holes. The two ends of the arc-shaped holes are provided with round holes, and the diameter of the round holes is greater than the width of the arc-shaped holes. The lock assembly includes a spacer, a spring and two telescopic pins. The spacer is arranged between the two side plates of the rotating seat, the spring is arranged in the spacer, and the two telescopic pins are respectively arranged at the two ends of the spacer. The telescopic pins can telescopically move 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 plates of the fixed seat. Three cylindrical step surfaces are arranged on the telescopic pins. The diameter of the first step surface is adapted to the inner diameter of the spacer and is greater than the diameter of the through hole on the rotating seat. The diameter of the second step surface is adapted to the diameter of the through hole on the rotating seat and the diameter of the round hole at the two ends of the arc-shaped hole on the fixed seat. The diameter of the third step surface is adapted to the width of the arc-shaped hole on the fixed seat. Through this arrangement, the structure of the mounting bracket is simple, and the rotating cooperation of the fixed seat and the rotating seat and the position locking function of the lock assembly can be realized.

[0009] In the above scheme, the fuse cylinder part is an arc-shaped plate, one part of the fuse core is located in the completely sealed part of the insulating shell, and the other part of the fuse core is located on the arc-shaped plate of the fuse cylinder part; the arc-shaped plate is provided with a positioning groove and a buckle block on the upper end face of each side, a fuse core cover is arranged on the fuse cylinder part, and the fuse core cover is provided with a positioning block corresponding to the positioning groove and a buckle corresponding to the buckle block. By arranging the fuse core cover, the fuse core can be protected, and the fuse core cover is connected to the fuse cylinder part by buckling, so that the assembly and disassembly of the fuse core cover are facilitated.

[0010] In the above scheme, the outer side of the fuse cylinder part is further provided with an insulating protrusion, the insulating protrusion is arranged in the axial direction of the fuse cylinder part, a high-voltage sensor is arranged in the insulating protrusion, and the outer side end of the high-voltage sensor is electrically connected to the fixed seat. By arranging the insulating protrusion, the high-voltage sensor can be arranged therein, and the high voltage on the outgoing line row of the pole is monitored by the high-voltage sensor.

[0011] In the above scheme, the fixed seat is further provided with an outgoing line row and a grounding row, and the outgoing line row and the grounding row are fixedly connected to the fixed seat. By this arrangement, the outgoing line and the grounding line of the pole can be connected.

[0012] In the above scheme, the insulating shell is provided with a fuse core clamp inside, the inner side end of the fuse core is fixedly connected to the fuse core clamp, and the fuse core clamp is in conductive connection with the inner side terminal of the arc-extinguishing chamber. By this arrangement, the fuse core can be in conductive connection with the arc-extinguishing chamber.

[0013] In the above scheme, the fuse core clamp comprises a bottom plate, two clamping plates and a locking clamp, the two clamping plates are arranged on the two sides of the bottom plate, arc-shaped parts corresponding to the cylindrical terminal of the fuse core are arranged on the middle parts of the clamping plates, the arc-shaped parts on the two clamping plates are oppositely arranged, the locking clamp comprises a horizontal rod and two vertical rods, the two vertical rods are arranged on the outer sides of the two clamping plates, the lower ends of the two vertical rods are rotatably connected to the two clamping plates, and the two ends of the horizontal rod are connected to the upper ends of the two vertical rods. The horizontal rod can be rotated above the two clamping plates to lock the two clamping plates, so that the two clamping plates clamp the cylindrical terminal of the fuse core. By this arrangement, the fuse core clamp can limit the axial and radial directions of the outer side end of the fuse core, so that the fuse core can be stably connected to the insulating shell.

[0014] In the above scheme, the completely sealed part is provided with a pressure equalizing ring, and the pressure equalizing ring is embedded in the insulating layer outside the connection part of the fuse core and the arc-extinguishing chamber. By arranging the pressure equalizing ring, the high voltage can be uniformly distributed around the object, the potential difference between the annular parts is ensured to be zero, the effect of pressure equalization is achieved, and the degradation rate of the insulating part is reduced.

[0015] In the above scheme, the complete solid seal part is provided with a shielding ring, the shielding ring is embedded in the outer insulating layer of the inner terminal of the fuse core, a pole post fixing seat is arranged outside the shielding ring, a metal nut block is embedded in the pole post fixing seat, and the metal nut block is electrically connected with the shielding ring respectively. By arranging the shielding ring, the discharge voltage possibly existing outside the pole post can be conducted to the shielding ring through the metal nut block, and the influence of the external discharge voltage on the internal elements of the pole post is prevented through the voltage equalizing effect of the shielding ring.

[0016] The utility model discloses a positive effect has: the utility model discloses 40.5kV half solid -sealed load switch pole, set up fuse cylinder part at one end of insulating casing, and set up rotary fuse core trip assembly to assemble and position fuse core, rotary fuse core trip assembly includes mounting bracket and fuse core clamp, and fuse core is assembled and positioned through fuse core clamp, and fuse core clamp is assembled to the end face of fuse cylinder part of insulating casing through mounting bracket, and the lock component on mounting bracket is used for locking and unlocking the position of fuse core clamp, under the assembly state of fuse core clamp and fuse core, fuse core clamp is locked through lock component, when needing to remove fuse core, first unlock locking piece, can take down fuse core clamp from fuse core, and through this setting, the quick assembly and disassembly of fuse core can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic drawing of 40.5kV half solid -sealed load switch pole of the utility model.

[0018] Figure 2 It is the rear side structure schematic drawing of 40.5kV half solid -sealed load switch pole of the utility model.

[0019] Figure 3 It is the structure schematic drawing of 40.5kV half solid -sealed load switch pole of the utility model (not show fuse core cover).

[0020] Figure 4 It is the section structure schematic drawing of 40.5kV half solid -sealed load switch pole of the utility model.

[0021] Figure 5 It is the connection structure schematic drawing of fuse core clamp and fuse core of the utility model.

[0022] Figure 6 It is the structure schematic drawing of mounting bracket of the utility model.

[0023] Figure 7 It is the section structure schematic drawing of lock component and fixed seat and rotating seat.

[0024] The reference numerals in the figure are as follows: Insulating housing 1, fully sealed part 11, pole fixing seat 111, metal nut block 112, fuse tube part 12, insulating protrusion 13, high voltage sensor 14, fuse clamp 15, fuse cover 16, buckle 161, equalizing ring 17, shielding ring 18, arc extinguishing chamber 2, fuse 3, cylindrical terminal 31, top rod 32, mounting bracket 4, fixing seat 41, arc hole 411, round hole 412, rotating seat 42, locking assembly 43, spacer 431, spring 432, telescopic pin 433, first step surface 434, second step surface 435, third step surface 436, fuse clamp 5, base plate 51, clamping plate 52, locking clamp 53, conductive plate 6, flexible connection 7, grounding bar 8, and outlet bar 9. Detailed Implementation

[0025] 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.

[0026] like Figures 1-4 The 40.5kV semi-solid-sealed load switch pole shown includes an insulating housing 1, an arc-extinguishing chamber 2, a fuse 3, and a rotary fuse tripping assembly.

[0027] like Figure 1 and 2 As shown, the insulating housing 1 includes a fully sealed portion 11 and a fuse tube portion 12.

[0028] The fully sealed part 11 has an arc-extinguishing chamber 2 inside. The assembly method of the arc-extinguishing chamber 2 inside the fully sealed part 11 is the same as the assembly method of the existing sealed pole. The structural shape of the fully sealed part 11 can also adopt the structural shape of the existing sealed pole, which will not be described in detail here.

[0029] The fuse tube section 12 is integrally formed with the fully sealed section, and is located on one side of the fuse core 3 of the sealed electrode. The fuse tube section 12 is an arc-shaped plate. A portion of the fuse core 3 is located inside the fully sealed section 11 of the insulating housing 1, and the other portion of the fuse core 3 is located on the arc-shaped plate of the fuse tube section 12. Positioning grooves and snap-fit ​​blocks are provided on the upper surfaces of both sides of the arc-shaped plate. A fuse core cover 16 is provided on the fuse tube section 12. The fuse core cover 16 is provided with positioning blocks corresponding to the positioning grooves and snap-fit ​​blocks corresponding to the snap-fit ​​blocks. By providing the fuse core cover 16, the fuse core 3 can be protected. The fuse core cover 16 is connected to the fuse tube section 12 by snap-fit, which facilitates the assembly and disassembly of the fuse core cover 16.

[0030] like Figure 4As shown, an insulating protrusion 13 is further arranged outside the fuse cylinder part 12, the insulating protrusion 13 is arranged along the axial direction of the fuse cylinder part 12, a high-voltage sensor 14 is arranged inside the insulating protrusion 13, and the outer end of the high-voltage sensor 14 is electrically connected with the fixed seat 41 of the rotary fuse core tripping assembly. By arranging the insulating protrusion 13, the high-voltage sensor 14 can be arranged inside the insulating protrusion 13, and the high-voltage sensor 14 can monitor the high voltage on the outgoing line row 9 on the pole.

[0031] A fuse core clamp 15 is further arranged inside the completely sealed part 11, the inner end of the fuse core 3 is fixedly connected with the fuse core clamp 15, and the fuse core clamp 15 is connected with the conductive rod of the arc extinguishing chamber 2. Through this arrangement, the fuse core 3 is conveniently connected with the arc extinguishing chamber 2.

[0032] As shown in the drawings, Figure 3 the outer end of the fuse core 3 extends to the end of the fuse cylinder part 12, and the outer end of the fuse core 3 is fixedly limited by the rotary fuse core tripping assembly.

[0033] The rotary fuse core tripping assembly comprises a mounting frame 4 and a fuse core clamp 5.

[0034] As shown in the drawings, Figure 6 the structure of the rotary fuse core tripping assembly can be designed as needed, and is preferably designed as a structure convenient for disassembly and assembly. For example, the structure shown in the drawings of the utility model can be designed. Figure 1 As shown in the drawings, Figure 1 the mounting frame 4 comprises a fixed seat 41, a rotating seat 42 and a lock assembly 43.

[0035] The fixed seat 41 is a fixed seat made of conductive material, the fixed seat 41 comprises a rear plate and side plates arranged on both sides of the rear plate, and the side plates are integrally formed with the rear plate. The rear plate of the fixed seat 41 is fixedly connected with the tail end surface of the fuse cylinder part 12, arc-shaped holes 411 are arranged on the side plates, respectively, and circular holes 412 are arranged at both ends of the arc-shaped holes 411, and the diameter of the circular holes 412 is greater than the width of the arc-shaped holes 411.

[0036] In order to facilitate assembly, the upper ends of the grounding row 8 and the outgoing line row 9 can be bolted to the tail end surface of the fuse cylinder part 12 through the rear plate of the fixed seat 41.

[0037] The rotating seat 42 comprises a top plate and two side plates located below the top plate, the top plate is used to connect the fuse core clamp 5, and the bottom plate of the fuse core clamp 5 and the flexible connecting piece 7 are fixedly connected on the top plate of the rotating seat 42 through bolts.

[0038] The rotating seat 42 is arranged between the side plates of the fixed seat 41, and the rotating seat 42 is movably connected with the fixed seat 41 through the lock assembly 43.

[0039] As shown in the drawings, Figure 7As shown, the lock assembly 43 comprises a spacer sleeve 431, a spring 432 and two telescopic pins 433. The spacer sleeve 431 is arranged between the two side plates of the rotating seat 42, the spring 432 is arranged in the spacer sleeve 431, and the two telescopic pins 433 are arranged at the two ends of the spacer sleeve 431 respectively. The telescopic pins 433 can telescopically move relative to the spacer sleeve 431, the ends of the telescopic pins 433 pass through the through hole of the rotating seat 42 and the circular hole of the fixed seat 41 in sequence, and extend to the outside of the side plates of the fixed seat 41. The telescopic pin 433 is provided with three cylindrical step faces. The diameter of the first step face 434 is adapted to the inner diameter of the spacer sleeve, and is larger than the diameter of the through hole of the rotating seat 42. The diameter of the second step face 435 is adapted to the diameter of the through hole of the rotating seat 42 and the diameter of the circular hole 432 at the two ends of the arc-shaped hole 431 of the fixed seat 41. The diameter of the third step face 436 is adapted to the width of the arc-shaped hole 411 of the fixed seat 41.

[0040] The structure of the telescopic pin 433 can be selected as required, for example, it can be a metal integral piece, or a metal sleeve and a bolt. The bolt is threadedly connected with the threaded hole in the metal sleeve, and three cylindrical step faces are arranged on the outer wall of the metal sleeve.

[0041] As shown in the drawings, Figure 5 The fuse core holder 5 comprises a bottom plate 51, two clamping plates 52 and a locking clamp 53. The two clamping plates 52 are arranged at the two sides of the bottom plate 51 respectively, and arc-shaped portions corresponding to the cylindrical terminals 31 of the fuse core 3 are arranged at the middle portions of the two clamping plates 52 respectively. The arc-shaped portions of the two clamping plates 52 are arranged oppositely, and the fuse core 3 is axially and radially limited by the cooperation of the arc-shaped portions of the two clamping plates 52. The locking clamp 53 comprises a horizontal rod and two vertical rods. The two vertical rods are arranged at the outer sides of the two clamping plates 52 respectively, and the lower ends of the two vertical rods are rotatably connected with the two clamping plates 52 respectively. The two ends of the horizontal rod are connected with the upper ends of the two vertical rods respectively, and the horizontal rod can be rotated above the two clamping plates 52 to lock the two clamping plates 52, so that the two clamping plates 52 clamp the cylindrical terminals 31 of the fuse core 3.

[0042] The electrically-conductive plate 6 is also arranged on the mounting frame 4, and is rotatably connected with the mounting frame 4. The position of the electrically-conductive plate 6 matches the cylindrical terminals 31 of the fuse core 3. In the normal operation state of the circuit, the electrically-conductive plate 6 is in contact with the cylindrical terminals 31 of the end portion of the fuse core 3. When the circuit is overloaded, the fuse in the fuse core 3 is melted, and the ejector rod 32 in the fuse core 3 is ejected from the cylindrical terminal 31, so that the electrically-conductive plate 6 is separated from the cylindrical terminal 31, and the circuit between them is disconnected.

[0043] As shown in the drawings, Figure 4As shown in the preferred embodiment, a pressure equalizing ring 17 is provided in the completely sealed part 11, which is embedded in the insulation layer outside the connecting part of the fuse core 3 and the arc extinguishing chamber 2. By providing the pressure equalizing ring 17, the high voltage can be evenly distributed around the object, ensuring that there is no potential difference between the ring-shaped parts, thereby achieving the effect of pressure equalization and reducing the degradation rate of the insulation part.

[0044] As shown in the preferred embodiment, a pressure equalizing ring 17 is provided in the completely sealed part 11, which is embedded in the insulation layer outside the connecting part of the fuse core 3 and the arc extinguishing chamber 2. By providing the pressure equalizing ring 17, the high voltage can be evenly distributed around the object, ensuring that there is no potential difference between the ring-shaped parts, thereby achieving the effect of pressure equalization and reducing the degradation rate of the insulation part. Figure 4 As shown in the preferred embodiment, a pressure equalizing ring 17 is provided in the completely sealed part 11, which is embedded in the insulation layer outside the connecting part of the fuse core 3 and the arc extinguishing chamber 2. By providing the pressure equalizing ring 17, the high voltage can be evenly distributed around the object, ensuring that there is no potential difference between the ring-shaped parts, thereby achieving the effect of pressure equalization and reducing the degradation rate of the insulation part. Figure 2 As shown in the preferred embodiment, a pressure equalizing ring 17 is provided in the completely sealed part 11, which is embedded in the insulation layer outside the connecting part of the fuse core 3 and the arc extinguishing chamber 2. By providing the pressure equalizing ring 17, the high voltage can be evenly distributed around the object, ensuring that there is no potential difference between the ring-shaped parts, thereby achieving the effect of pressure equalization and reducing the degradation rate of the insulation part.

[0045] The 40.5kV semi-solid sealed load switch pole of the utility model, when assembling the fuse core, can first push the telescopic pins at both ends of the lock assembly, and make the telescopic pins shrink towards the inside of the spacer sleeve, and make the third step surface of the telescopic pins move to the position opposite to the round hole on the fixed seat, because the diameter of the third step surface is adapted to the width of the arc-shaped hole on the fixed seat, so the third step surface can slide along the arc-shaped hole, and slide from the round hole position at the upper end of the arc-shaped hole to the round hole position at the lower end of the arc-shaped hole, at the same time, the rotating seat rotates downwards relative to the fixed seat, and drives the fuse core clamp to rotate downwards, after rotating in place, the telescopic pins are loosened, the telescopic pins extend under the action of the spring in the spacer sleeve, and make the second step surface on the telescopic pins enter the round hole at the lower end of the arc-shaped hole, because the diameter of the second step surface is greater than the diameter of the arc-shaped hole, at this time, the telescopic pins cannot rotate along the arc-shaped hole, so the rotating seat can be locked.

[0046] The 40.5kV semi-solid sealed load switch pole of the utility model, through setting the fuse cylinder part on the insulation shell, and designing the installation seat convenient to disassemble and assemble, can realize the quick assembly and disassembly of the fuse core, and can make the fuse core be axially and radially positioned stably when being assembled, and guarantee the stability of the circuit connection.

[0047] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present application, which is defined by the appended claims and their equivalents.

Claims

1. A 40.5 kV semi-encapsulated load break switch pole, characterized by: The application relates to a fuse device, which comprises an insulating shell, an arc-extinguishing chamber, a fuse core and a rotary fuse core tripping assembly, one end of the insulating shell is a completely sealed part, the other end is a fuse cylinder part, the arc-extinguishing chamber is arranged in the completely sealed part, one part of the fuse core is arranged in the completely sealed part, the other part of the fuse core is arranged in the fuse cylinder part, the rotary fuse core tripping assembly is arranged at the tail end of the fuse cylinder part, the rotary fuse core tripping assembly comprises a mounting frame and a fuse core clamp, the mounting frame is fixedly connected to the end face of the fuse cylinder part, the fuse core clamp and a flexible connecting piece are connected to the mounting frame, and a conductive plate is further arranged on the mounting frame and is rotationally and movably connected to the mounting frame, the position of the conductive plate is matched with the cylindrical terminal of the fuse core.

2. The 40.5 kV semi-hermetically sealed load switch pole according to claim 1, characterized in that: The mounting frame comprises a fixed seat, a rotating seat and a lock assembly, the fixed seat is fixedly connected to the end face of the fuse cylinder part, the two side plates of the rotating seat are movably connected to the fixed seat through the lock assembly, and the rotating seat is arranged between the two side plates of the fixed seat, and the top plate of the rotating seat is fixedly connected to the fuse core clamp and the flexible connecting piece.

3. The 40.5 kV semi-hermetically sealed load switch pole according to claim 2, characterized in that: The rear side plate of the fixed seat is fixedly connected to the end face of the fuse cylinder part, arc-shaped holes are arranged on the two side plates of the fixed seat, and round holes are arranged at the two ends of the arc-shaped holes, the diameter of the round holes is larger than the width of the arc-shaped holes, the lock assembly comprises a spacer, a spring and two telescopic pins, the spacer is arranged between the two side plates of the rotating seat, the spring is arranged in the spacer, the two telescopic pins are arranged at the two ends of the spacer, the telescopic pins can telescopically move 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 plates of the fixed seat, three cylindrical step faces are arranged on the telescopic pins, the diameter of the first step face is matched with the inner diameter of the spacer and is larger than the diameter of the through holes on the rotating seat, the diameter of the second step face is matched with the diameter of the through holes on the rotating seat and the diameter of the round holes at the two ends of the arc-shaped holes on the fixed seat, and the diameter of the third step face is matched with the width of the arc-shaped holes on the fixed seat.

4. The 40.5 kV semi-hermetically sealed load switch pole according to claim 1, characterized in that: The tail end of the fuse cylinder part is an arc-shaped plate, one part of the fuse core is arranged in the completely sealed part of the insulating shell, the other part of the fuse core is arranged on the arc-shaped plate of the fuse cylinder part, positioning grooves and buckle blocks are arranged on the upper end faces of the two sides of the arc-shaped plate, a fuse core cover is arranged on the fuse cylinder part, and positioning blocks corresponding to the positioning grooves and buckles corresponding to the buckle blocks are arranged on the fuse core cover.

5. The 40.5 kV semi-hermetically sealed load switch pole according to claim 2, characterized in that: An insulating protrusion is further arranged on the outside of the fuse cylinder part, the insulating protrusion is arranged along the axial direction of the fuse cylinder part, a high-voltage sensor is arranged in the insulating protrusion, and the outside end of the high-voltage sensor is electrically connected to the fixed seat.

6. The 40.5 kV semi-hermetically sealed load switch pole according to claim 2, characterized in that: Wire outlets and a grounding row are further arranged on the fixed seat, and the wire outlets and the grounding row are fixedly connected to the fixed seat.

7. The 40.5 kV semi-hermetically sealed load switch pole according to claim 1, characterized in that: A fuse core clamp is arranged in the insulating shell, the inside end of the fuse core is fixedly connected to the fuse core clamp, and the fuse core clamp is connected to the conductive rod of the arc-extinguishing chamber.

8. The 40.5 kV semi-hermetically sealed load switch pole according to claim 1, characterized in that: The core clamp comprises a bottom plate, two clamping plates and a locking clamp, the two clamping plates are respectively arranged on the two sides of the bottom plate, arc-shaped parts corresponding to the cylindrical terminals on the core are respectively arranged in the middle of the clamping plates, the arc-shaped parts on the two clamping plates are oppositely arranged, the locking clamp comprises a horizontal rod and two vertical rods, the two vertical rods are respectively arranged on the outer sides of the two clamping plates, the lower ends of the two vertical rods are respectively rotationally connected with the two clamping plates, the two ends of the horizontal rod are respectively connected with the upper ends of the two vertical rods, and the horizontal rod can be rotated to the upper side of the two clamping plates to lock the two clamping plates, so that the two clamping plates clamp the cylindrical terminals of the core.

9. The 40.5 kV semi-hermetically sealed load switch pole according to claim 1, characterized in that: The complete sealed part is internally provided with a pressure equalizing ring, and the pressure equalizing ring is embedded in the insulating layer outside the connecting part of the core and the arc extinguishing chamber.

10. The 40.5 kV semi-hermetically sealed load switch pole according to claim 1, characterized in that: The complete sealed part is internally provided with a shielding ring, the shielding ring is embedded in the insulating layer outside the inner terminal of the core, a pole fixing seat is arranged outside the shielding ring, a metal nut block is embedded in the pole fixing seat, and the metal nut block is electrically connected with the shielding ring.

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