A load carrying replacement drop-out fuse auxiliary device

Abstract

The application relates to the technical field of drop-out fuses, and discloses a load-carrying replacement drop-out fuse auxiliary device, which comprises an assembling seat, the assembling seat is clamped on the outer side of a cross beam and located on the side of a drop-out fuse, the top end of the assembling seat is connected with an insulating rod, the outer lower side of the insulating rod is sleeved with a first clamping seat, the outer upper side is sleeved with a second clamping seat, the outer side of the first clamping seat is connected with an assembling ring, the inner side of the assembling ring is inserted with an insulating barrel, the outer side of the second clamping seat is connected with a first wire clamp and a second wire clamp, and the inner sides of the first clamping seat and the second clamping seat are both inserted with collets. The load-carrying replacement drop-out fuse auxiliary device can clamp the insulating rod on the side of the cross beam through the assembling seat, the live wire material that is removed can pass through the wire clamp, be placed into the insulating barrel and be fixed, the safety risk caused by swing of the live wire material is avoided, the replacement can be completed without removing the whole bus, and the operation convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of drop-out fuse technology, specifically to an auxiliary device for replacing drop-out fuses under load. Background Technology

[0002] Drop-out fuses are core devices used for overload and short-circuit protection in power distribution lines. They are widely deployed in branch lines and upstream of distribution transformers in urban and rural power distribution networks, and their stable operation directly affects the power supply quality and reliability of the power distribution system. When a drop-out fuse fails or reaches its replacement cycle, on-load replacement can minimize the impact of power outages. Therefore, various auxiliary devices are widely used in such maintenance operations to improve safety and efficiency.

[0003] Existing auxiliary devices for replacing drop-out fuses under load have significant limitations. Their installation and fixing process is cumbersome, requiring additional fixing tools and, in some cases, the erection of temporary work platforms, significantly increasing the workload before operation. Furthermore, existing devices lack dedicated clamping and insulation protection structures for live wires; the removed live wires can only be temporarily suspended or held in place by the operator, making them prone to swinging and potentially causing phase-to-phase short circuits and grounding faults, while also posing a significant risk of electric shock. In addition, using existing devices typically requires dismantling the entire bus line to replace the fuse, adding unnecessary wiring disassembly and reassembly steps, prolonging the operation time, and increasing the workload of the operators, failing to meet the requirements for replacing drop-out fuses. Therefore, an auxiliary device for replacing drop-out fuses under load is proposed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides an auxiliary device for replacing drop-out fuses under load, so as to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary device for replacing drop-out fuses under load, comprising: The mounting base is snapped onto the outside of the crossbeam and located on the side of the drop-out fuse. An insulating rod is connected to the top of the mounting base, and a support plate is connected to the outside of the insulating rod at the lower side of the crossbeam. A slide groove is formed inside the assembly base. A slide block is inserted inside the slide groove. A clamp is connected to the outer end of the slide block. A screw is screwed into the inside of the slide block. The first card holder is sleeved on the lower outer side of the insulating rod, and the upper outer side of the insulating rod is sleeved with the second card holder. An assembly ring is connected to the outside of the first card holder, and an insulating barrel is inserted into the inside of the assembly ring. The first clamp is connected to the outside of the second card holder. The second clamp is connected to the outside of the first clamp. The first card holder and the second card holder are both equipped with clamps. Limiting holes are opened in the middle of the clamps and the first and second card holders. The inner end of the clamps is equipped with a fitting, and a spring is inserted inside the fitting.

[0006] Preferably, the side of the support plate and clamp plate that contacts the crossbeam is covered with a rubber pad, and the height of the slide groove is at least three times the thickness of the clamp plate. The rubber pad can increase the friction between the support plate and the crossbeam, improve the stability of the device, and at the same time prevent metal parts from directly contacting and scratching the surface of the crossbeam. The sufficient height of the slide groove can accommodate crossbeams of different specifications.

[0007] Preferably, bearing seats are connected to the upper and lower sides of the assembly base at positions corresponding to the screw. The screw passes through the interior of the bearing seat and is connected to its inner ring. The bearing seat can effectively reduce the frictional resistance when the screw rotates, making the screw rotate more smoothly and effortlessly. At the same time, it provides stable support for the screw and prevents it from shaking or shifting during rotation.

[0008] Preferably, a handwheel is coaxially connected to the bottom end of the screw, and a lever is circumferentially connected to the outside of the handwheel. The lever is covered with an anti-slip sleeve. The cooperation between the handwheel and the lever allows the operator to turn the screw by hand without the need for additional tools. The anti-slip sleeve increases the grip friction, prevents slippage during operation, and improves work efficiency.

[0009] Preferably, the outer side of the insulating bucket is connected to the inner wall of the assembly ring, and the inner wall of the insulating bucket is covered with an insulating bushing. The insulating bushing can further improve the insulation protection performance of the insulating bucket, effectively block the current conduction of live wires, provide more reliable safety protection for operators, and ensure that the insulating bucket is installed stably.

[0010] Preferably, both the first and second wire clamps are equipped with bolts and nuts as fasteners on their side ears, and insulating pads are snapped into the inner walls of both the first and second wire clamps. The bolts and nuts can firmly clamp the wire to prevent it from loosening and falling off, and the insulating pads can prevent the wire from directly contacting the metal wire clamps, protect the wire insulation layer from damage, and improve the safety of use.

[0011] Preferably, there are at least two sets of the first card holders, and the outer end of the clamp is equipped with a protrusion. The outer side of the protrusion is an arc-shaped structure. Multiple sets of first card holders can provide multi-point support for the insulating bucket, improving the stability of the insulating bucket installation. The arc-shaped protrusion facilitates pressing the clamp.

[0012] Preferably, the clamp has the same diameter as the limiting hole inside the first and second card seats. The diameter of the limiting hole is larger than the diameter of the insulating rod. The uniform diameter of the limiting hole can ensure the fitting accuracy between the clamp and the card seat and avoid jamming. The larger diameter of the hole makes it easier for the card seat to smoothly fit into the insulating rod, simplifying the installation and disassembly process of the device.

[0013] Preferably, the inner wall of the limiting hole of the clamp is lined with a rubber washer, and the left and right ends of the spring are respectively connected to the inner walls of the mounting bracket and the first and second brackets. The rubber washer can increase the friction between the limiting hole and the insulating rod, improve the stability of the bracket fixing, and at the same time buffer vibration to protect the insulating rod. The connection method of the spring can ensure that the clamp automatically resets after being pressed, making operation convenient.

[0014] Preferably, the length of the fitting is at least one-third of the length of the spring, and the upper and lower opening edges of the limiting hole are rounded. A sufficiently long fitting can provide good guidance for the spring, prevent the spring from bending and deforming when compressed, and extend its service life. The rounded corner structure can avoid scratching the insulating rod and make the card holder slide more smoothly.

[0015] Compared with the prior art, the present invention provides an auxiliary device for replacing drop-out fuses under load, which has the following advantages: This auxiliary device for replacing drop-out fuses under load allows the added mounting base to clamp the insulating rod onto the side of the crossbeam of the drop-out fuse. This enables the live wire removed from the top to be passed through the first and second clamps and placed directly into the insulating barrel during replacement. Simultaneously, pressing the clamp head moves the second mounting base up and down, and the wire is secured by the fasteners of the first and second clamps. This avoids the risk of phase-to-phase short circuits, grounding faults, and electric shock caused by the live wire swinging arbitrarily, thus providing safety for the workers. Furthermore, when replacing drop-out fuses, it is not necessary to remove the entire bus. After the new drop-out fuse is installed, simply remove the wiring terminals from inside the insulation bucket and connect them directly to the terminals of the replaced drop-out fuse. This improves the convenience of the auxiliary device when replacing drop-out fuses, reduces unnecessary wiring disassembly and assembly, shortens the replacement time of a single device, reduces the labor intensity of operators, and enhances the practicality of the auxiliary device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the assembly base structure of the present invention; Figure 3 This is a schematic diagram of the insulating rod structure of the present invention; Figure 4This is a schematic diagram of the second card holder structure of the present invention; Figure 5 This is a schematic diagram of the first card holder and assembly ring structure of the present invention; Figure 6 This is a schematic diagram of the transverse cross-sectional structure of the first card holder of the present invention.

[0017] In the diagram: 1. Assembly base; 2. Crossbeam; 3. Drop-out fuse; 4. Insulating rod; 5. Bearing seat; 6. Support plate; 7. Slide groove; 8. Slide block; 9. Clamping plate; 10. Screw; 101. Handwheel; 11. First clamping seat; 12. Second clamping seat; 13. First wire clamp; 14. Second wire clamp; 15. Assembly ring; 16. Insulating barrel; 17. Clamp; 171. Protrusion; 18. Limiting hole; 181. Rubber washer; 19. Assembly kit; 20. Spring; 21. Insulating pad. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a technical solution: an auxiliary device for replacing drop-out fuses under load, comprising an assembly base 1, a crossbeam 2, a drop-out fuse 3, an insulating rod 4, a bearing seat 5, a support plate 6, a slide groove 7, a slide block 8, a clamping plate 9, a screw 10, a handwheel 101, a first clamping seat 11, a second clamping seat 12, a first wire clamp 13, a second wire clamp 14, an assembly ring 15, an insulating barrel 16, clamps 17 and 171, a protruding strip; a limiting hole 18, a rubber washer 181, an assembly kit 19, a spring 20, and an insulating pad 21. Please see Figure 1 The mounting base 1 is snapped onto the outside of the crossbeam 2, located on the side of the drop-out fuse 3. An insulating rod 4 is connected to the top of the mounting base 1. (See attached image.) Figure 2 The outer side of the insulating rod 4 is connected to a support plate 6 located below the crossbeam 2; The slide 7 is opened inside the assembly base 1. The slide 8 is inserted inside the slide 7. The outer end of the slide 8 is connected to the clamp 9. The inside of the slide 8 is screwed with the screw 10.

[0020] Please see Figure 3 The first retainer 11 is sleeved on the lower outer side of the insulating rod 4, and the second retainer 12 is sleeved on the upper outer side of the insulating rod 4. Please refer to [link / reference]. Figure 5 and Figure 3 The first card holder 11 is externally connected to an assembly ring 15, and an insulating barrel 16 is inserted inside the assembly ring 15.

[0021] Please see Figure 4 The first wire clip 13 is connected to the outside of the second card holder 12, and the second wire clip 14 is connected to the outside of the first wire clip 13. Please refer to [link / reference]. Figure 6 The first card holder 11 and the second card holder 12 are both equipped with a clamp 17. The clamp 17 and the middle of the first card holder 11 and the second card holder 12 are both provided with a limit hole 18. The inner end of the clamp 17 is equipped with a fitting 19, and the fitting 19 is equipped with a spring 20.

[0022] The added mounting base 1 allows the insulating rod 4 to be clipped onto the side of the crossbeam 2 of the drop-out fuse 3. This allows the live wire removed from the top to be passed through the first clamp 13 and the second clamp 14 and placed directly into the insulating bucket 16 when the drop-out fuse 3 is being replaced. At the same time, pressing the clamp 17 moves the second clamp 12 up and down, and the wire is fixed by the fasteners of the first clamp 13 and the second clamp 14. This avoids the risk of phase-to-phase short circuits, grounding faults, and electric shock to personnel caused by the live wire swinging randomly, and provides safety for the workers. Furthermore, when replacing the drop-out fuse 3, it is not necessary to remove the entire bus. After the new drop-out fuse 3 is installed, simply take out the wiring terminals inside the insulation bucket 16 and connect them directly to the terminals of the replaced drop-out fuse 3. This improves the convenience of the auxiliary device when replacing the drop-out fuse 3, reduces unnecessary wiring disassembly and assembly, shortens the replacement time of a single device, reduces the labor intensity of operators, and enhances the practicality of the auxiliary device.

[0023] Rubber pads are laid on the side of the support plate 6 and the clamping plate 9 that are in contact with the crossbeam 2. The height of the slide groove 7 is at least three times the thickness of the clamping plate 9. Bearing seats 5 are connected to the upper and lower sides of the outer side of the mounting base 1 at positions corresponding to the screw 10. The screw 10 passes through the interior of the bearing seat 5 and is connected to its inner ring. A handwheel 101 is coaxially connected to the bottom end of the screw 10. A lever is circumferentially connected to the outer side of the handwheel 101. Anti-slip sleeves are fitted on the outer side of the lever.

[0024] The outer side of the insulating barrel 16 is connected to the inner wall of the assembly ring 15. The inner wall of the insulating barrel 16 is covered with an insulating bushing. The side ears of the first wire clamp 13 and the second wire clamp 14 are equipped with bolts and nuts. The inner walls of the first wire clamp 13 and the second wire clamp 14 are clamped with insulating pads 21. The number of first clamp seats 11 is at least two sets. The outer end of the clamp 17 is equipped with a protrusion 171, and the outer side of the protrusion 171 is an arc-shaped structure.

[0025] The chuck 17 has the same diameter as the limiting hole 18 inside the first card seat 11 and the second card seat 12. The diameter of the limiting hole 18 is larger than the diameter of the insulating rod 4. The inner wall of the limiting hole 18 of the chuck 17 is lined with a rubber gasket 181. The left and right ends of the spring 20 are respectively connected to the mounting 19 and the inner walls of the first card seat 11 and the second card seat 12. The length of the mounting 19 is at least one-third of the length of the spring 20. The upper and lower opening edges of the limiting hole 18 are rounded.

[0026] This solution uses an additional mounting base 1 to attach the insulating rod 4 to the side of the crossbeam 2 of the drop-out fuse 3. This allows the live wire removed from the top to be passed through the first clamp 13 and the second clamp 14 and placed directly into the insulating bucket 16 when replacing the drop-out fuse 3. At the same time, pressing the clamp 17 moves the second mounting base 12 up and down, and the fasteners of the first clamp 13 and the second clamp 14 fix the wire in place. This avoids the risk of phase-to-phase short circuits, grounding faults, and electric shock caused by the live wire swinging around, thus providing a safety guarantee for the workers. Furthermore, when replacing the drop-out fuse 3, it is not necessary to remove the entire bus. After the new drop-out fuse 3 is installed, simply take out the wiring terminals inside the insulation bucket 16 and connect them directly to the terminals of the replaced drop-out fuse 3. This improves the convenience of the auxiliary device when replacing the drop-out fuse 3, reduces unnecessary wiring disassembly and assembly, shortens the replacement time of a single device, reduces the labor intensity of operators, and enhances the practicality of the auxiliary device.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the 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 principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for replacing drop-out fuses under load, characterized in that, include: Assembly base (1), the assembly base (1) is snapped onto the outside of the crossbeam (2) on the side of the drop-out fuse (3), the top of the assembly base (1) is connected to an insulating rod (4), and the outside of the insulating rod (4) is connected to a support plate (6) at the position below the crossbeam (2). A slide (7) is provided inside the mounting base (1). A slide block (8) is inserted inside the slide (7). A clamp (9) is connected to the outer end of the slide block (8). A screw (10) is screwed into the inside of the slide block (8). The first card holder (11) is sleeved on the lower outer side of the insulating rod (4), and the upper outer side of the insulating rod (4) is sleeved with the second card holder (12). The first card holder (11) is connected to the outside of the assembly ring (15), and the assembly ring (15) is inserted with the insulating barrel (16). The first clamp (13) is connected to the outside of the second card holder (12). The second clamp (14) is connected to the outside of the first clamp (13). The first card holder (11) and the second card holder (12) are both equipped with clamps (17). The clamps (17) and the middle of the first card holder (11) and the second card holder (12) are all provided with limit holes (18). The inner end of the clamps (17) is equipped with a fitting (19), and the fitting (19) is equipped with a spring (20).

2. The auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The side of the support plate (6) and the clamping plate (9) that contacts the crossbeam (2) is covered with a rubber pad, and the height of the chute (7) is at least three times the thickness of the clamping plate (9).

3. The auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The upper and lower sides of the assembly base (1) are connected to bearing seats (5) at positions corresponding to the screw (10). The screw (10) passes through the interior of the bearing seat (5) and is connected to its inner ring.

4. The auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The bottom end of the screw (10) is coaxially connected to a handwheel (101), and a lever is circumferentially connected to the outside of the handwheel (101). The lever is covered with an anti-slip sleeve.

5. The auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The outside of the insulating barrel (16) is connected to the inner wall of the assembly ring (15), and the inner wall of the insulating barrel (16) is covered with an insulating bushing.

6. The auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The first clamp (13) and the second clamp (14) are both equipped with bolt and nut fasteners on their side ears, and the inner walls of the first clamp (13) and the second clamp (14) are both fitted with insulating pads (21).

7. The auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The number of the first card holder (11) is at least two sets, and the outer end of the clamp (17) is equipped with a protrusion (171), the outer side of the protrusion (171) is an arc structure.

8. The auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The clamp (17) has the same diameter as the limiting hole (18) inside the first card seat (11) and the second card seat (12), and the diameter of the limiting hole (18) is larger than the diameter of the insulating rod (4).

9. An auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The inner wall of the limiting hole (18) of the clamp (17) is covered with a rubber gasket (181), and the left and right ends of the spring (20) are respectively connected to the inner walls of the mounting bracket (19), the first card holder (11), and the second card holder (12).

10. An auxiliary device for replacing drop-out fuses under load according to claim 1, characterized in that: The length of the assembly (19) is at least one-third of the length of the spring (20), and the upper and lower opening edges of the limiting hole (18) are rounded.

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