Fuse tube operating device for fuses and method of use thereof

Abstract

The application relates to a fuse tube operating device for a fuse, in particular to a fuse tube operating device for a fuse and a use method thereof, which comprises a closing operating structure and / or a separating operating structure; the closing operating structure comprises a closing operating rod; a closing operating head is arranged at the end of the closing operating rod; a closing connecting structure is arranged on the closing operating head; the separating operating structure comprises a separating operating rod and a separating operating head arranged on the separating operating rod; a separating connecting structure is arranged on the separating operating head; the closing operating rod can drive a to-be-installed fuse tube to be inserted into the fuse through the closing operating structure; the separating operating rod can remove a to-be-removed fuse tube from the fuse through the separating operating head; the closing operating structure can assist in installing a new fuse tube in the fuse, and the separating operating structure can assist in removing an old fuse tube which has been disconnected from the fuse; the two structures can be used respectively to realize the installation and removal of the fuse tube in the fuse.

Description

Technical Field

[0001] This invention relates to a fuse tube operating device, specifically a fuse tube operating device for a fuse and its method of use. Background Technology

[0002] Fuses are widely used protective electrical devices in power systems, and their core component is the fuse tube (or fuse element). In a fully enclosed fuse, the fuse tube is installed in a sealed insulating housing. When an overload or short-circuit current passes through, the fusible element inside the fuse tube melts, thereby cutting off the circuit and providing protection.

[0003] Fuses need to be replaced after activation; therefore, the disassembly and assembly of fuses is a routine operation in the operation and maintenance of power equipment.

[0004] Currently, the installation and removal of fuse tubes in fully enclosed fuses are typically done using simple, general-purpose tools or by hand. When installing a new fuse tube, it needs to be pushed along the mounting hole on the fuse housing to a predetermined internal position, ensuring reliable contact with the internal contact structure. When removing an old fuse tube, it needs to be pulled out of the mounting hole. Because the mounting holes in fully enclosed fuses are usually quite deep, and the clearance between the fuse tube and the mounting hole is small, the following problems arise during actual operation:

[0005] Existing operating tools lack reliable positioning and clamping capabilities for the fuse tube. During the pushing and installation process, the fuse tube is prone to deflection or slippage, causing hard interference between the end of the fuse tube and the inlet of the mounting hole. This not only increases the difficulty of installation but also easily damages the outer wall of the fuse tube or the internal structure of the fuse housing.

[0006] Secondly, existing tools lack effective hooking or gripping structures when removing old fusion tubes. Because old fusion tubes may be deformed or burned after melting, their end structures have poor integrity, making it difficult for general-purpose tools to form a stable connection with them. They are prone to detachment or slippage during outward pulling, leading to dismantling failure.

[0007] Third, the existing operating tools have relatively limited functionality and cannot simultaneously meet the operational needs of both installation and removal. Furthermore, the operating distance is fixed and cannot be flexibly adjusted according to the actual installation height of the fuse. When the fuse is positioned high up, operators often need to use ladders or other climbing equipment, which reduces work efficiency and increases the safety risks of working at heights.

[0008] Existing patent CN119674665A discloses a combination tool for installing grounding wires and preventing fuse tubes from falling off; this combination tool is mainly used to prevent fuse tubes from falling off when grounding wires, but the patent cannot effectively achieve the installation and removal of fuse tubes.

[0009] Therefore, in order to improve or solve at least one of the above technical problems, it is necessary to optimize the design of existing tools. Summary of the Invention

[0010] The purpose of this invention is to provide an operational tool that can assist in the assembly and disassembly of fusible tubes.

[0011] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0012] A fuse tube operating device for a fuse includes a closing operating structure and / or a separating operating structure;

[0013] The closing operation structure includes a closing operation rod; the end of the closing operation rod is provided with a closing operation head; the closing operation head is provided with a closing connection structure for connecting the molten tube to be installed;

[0014] The separation operation structure includes a separation operation rod, and a separation operation head on the separation operation rod; the separation operation head is provided with a separation connection structure for connecting the molten tube to be disassembled;

[0015] The closing operating lever can drive the fuse tube to be installed into the fuse through the closing operating structure;

[0016] The separation lever can remove the fuse tube to be disassembled from the fuse via the separation operation head.

[0017] The closed connection structure includes a closed groove provided at the end of the closed operation head, and a snap-fit ​​plate is provided at the edge of the closed groove; the snap-fit ​​plate can be pressed against the side of the molten tube to be installed.

[0018] The closed settling tank is provided with a snap-fit ​​edge plate on each of its opposite sides;

[0019] The separation connection structure includes a separation sink provided at the end of the separation operation head; the inner wall of the separation sink is provided with a hanging protrusion;

[0020] The separation trough has a hanging protrusion on each of its opposite sides.

[0021] The snap-fit ​​edge plate includes an edge plate body; one end of the edge plate body is connected to the closing operation head, and the other end is connected to a U-shaped plate; one end of the U-shaped plate is connected to the edge plate body, and the other end extends freely; the snap-fit ​​edge plate is deformable.

[0022] The side of the closed operating head is provided with a side sink groove; the side sink groove and the closed sink groove are distributed at intervals; the main body of the side plate is installed in the side sink groove.

[0023] Both the closed sink and the separated sink are equipped with limiting rivets;

[0024] Both the closing and separating operating heads are provided with assembly through holes for installing limit rivets; the assembly through holes can communicate with the closing or separating sink.

[0025] Both the closing operation head and the separating operation head are provided with lateral through holes; the lateral through holes can be connected to the closing sink or the separating sink.

[0026] The closing operation head includes an upper closing operation head and a lower closing operation head; the upper closing operation head and the lower closing operation head can swing relative to each other; the lower closing operation head is connected to the closing operation rod; the upper closing operation head is connected to the lower closing operation head; the closing groove, the lateral through hole and the limiting rivet rod provided on the closing operation head are all provided on the upper closing operation head.

[0027] The upper closing operating head is connected to the lower closing operating head via a linkage mechanism;

[0028] The linkage mechanism includes a linkage countersunk hole on the upper closing operating head and a conical protrusion on the lower closing operating head; the upper closing operating head is sleeved on the conical protrusion through the linkage countersunk hole; the upper operating head and the lower operating head are also connected by an elastic element.

[0029] The elastic element is arranged at the connection between the upper closing operating head and the lower closing operating head;

[0030] The elastic element is a helical spring; the helical spring is sleeved at the connection between the upper closing operating head and the lower closing operating head, and both ends of the helical spring are respectively connected to the upper closing operating head and the lower closing operating head.

[0031] The upper and lower closing operating heads are provided with mounting spiral grooves at their ends; the spiral spring is connected to the upper or lower closing operating head through the mounting spiral grooves.

[0032] Both the closing and separating operating heads are fitted with plastic guide sleeves;

[0033] Both the closing and separating operating levers are equipped with protective covers; the protective covers are fitted onto the closing or separating operating levers; both the closing and separating operating levers are insulating rods.

[0034] The end of the closing operation head is provided with an end groove; the end groove and the closing groove are coaxially distributed; the inner diameter of the end groove is larger than the inner diameter of the closing groove.

[0035] The closing operating lever and the separating operating lever can be connected by a disassembly and assembly mechanism; the disassembly and assembly mechanism includes a threaded rod provided at the end of the closing operating lever and a threaded countersunk hole provided at the end of the separating operating lever; the closing operating lever can be connected to the threaded countersunk hole at the end of the separating operating lever through the threaded rod.

[0036] A method of using the fuse tube operating device for the aforementioned fuse, the method comprising the following steps:

[0037] Step 1: Determine the model and size of the fuse and fuse tube to be operated, and check and confirm that the selected fuse tube operating device matches the specifications of the fuse tube to be operated.

[0038] Step 2: After completing Step 1, determine the operation mode of the fusible link:

[0039] The operation of a fusible link includes closing and opening operations;

[0040] The closing operation is used to install a new fuse tube in the fuse;

[0041] The closing operation has the following steps:

[0042] Step S1: Determine the operating height and operating space of the melting tube;

[0043] If the operator can reach the installation position of the molten tube to be installed using a single closed operating structure, then the closed operating structure can be used directly.

[0044] If operation is not possible due to height or space limitations, the closed operation structure and the separated operation structure will be connected by a disassembly and assembly mechanism to extend the operation distance.

[0045] Step S2: Connect the molten tube to be loaded to the closing operation structure;

[0046] Insert the end of the molten tube to be installed into the closed groove in the closing operation head, so that the snap-fit ​​plates on both sides of the closed groove can use their own elastic deformation to clamp the molten tube to be installed on both sides, thereby positioning and temporarily fixing it.

[0047] Step S3: Push and install;

[0048] Hold the closing or opening lever and apply force along the installation direction of the fuse tube in the fuse to push the fuse tube smoothly into the fuse until it is installed in place;

[0049] Step S4: After step S3 is completed, pull the closing or separating operating lever in the opposite direction to separate the closing operating structure from the molten tube to be installed; at this point, the installation of one molten tube is complete.

[0050] The disconnection operation is used to remove the disconnected fuse tube in a fuse holder; the disconnection operation has the following steps:

[0051] Step 1: Determine the operating height of the fusion tube to be disassembled;

[0052] Determine the operating height and operating space of the molten tube to be disassembled; if the operator can reach the disassembly position of the molten tube using a single separation operating structure, then use the separation operating structure directly; if it is not possible to operate due to height or space limitations, then connect the separation operating structure and the closing operating structure through a disassembly and assembly mechanism to extend the operating distance.

[0053] Step 2: Hook and fix; bring the separation operation head at the end of the separation operation rod close to the molten tube to be disassembled, so that the end of the molten tube enters the separation sink; then rotate the separation operation structure; so that the hook protrusion on the inner wall of the separation sink hooks onto the protrusion on the molten tube to be disassembled; thus achieving hook connection;

[0054] Step 3; Remove the fuse tube;

[0055] Hold the release lever or the closing lever and apply force outward along the axis of the fuse tube to pull the fuse tube out of the fuse.

[0056] Step 4: After completing Step 3, the operation of one fusible tube to be disassembled is completed. If a new fusible tube needs to be installed, the above closing operation can be repeated.

[0057] The advantages of this invention are:

[0058] This invention discloses a fuse tube operating device for fuses and its usage method.

[0059] This invention, through the design of a closed-loop operation structure, can assist in the installation of a new fuse tube in a fuse, while the separation operation structure can assist in the removal of an old fuse tube that has been disconnected from the fuse; when used separately, both can be used to install and remove fuse tubes in a fuse.

[0060] Meanwhile, the closed operation structure and the separated operation structure of the present invention can be used together. The combination of the two can increase the operating distance of the fuse tube operating device, reduce the use of other auxiliary equipment, and enable the operator to operate the fuse in the air while standing on the ground; and the fuse tube operating device of the present invention can be adapted to fuses arranged at different heights.

[0061] In addition, the present invention uses a closed connection structure to achieve lateral restraint of the molten tube to be installed through lateral compression. At the same time, with the U-shaped plate, it can not only compress and fix the molten tube to be installed, but also facilitate the assembly and detachment of the molten tube.

[0062] The separation operation head hangs the molten tube to be disassembled by attaching a protrusion hook. The overall structure of the separation operation is simple and can be used in conjunction with the protrusion on the molten tube, which facilitates the actual disassembly of the old molten tube.

[0063] In this invention, limiting rivets are provided in the closed sink and the separating sink. At the same time, it is required that the limiting rivets have a certain gap from the bottom surface of the closed sink or the separating sink. The limiting rivets of this invention can play a good longitudinal support role and are used to control the insertion depth of the fusion tube in the closed sink or the separating sink.

[0064] In this invention, the lateral through hole serves as an external connection, allowing gas to be easily discharged from the separation or closure operating head when problems such as melting or smoking occur during the assembly or disassembly of the fusion tube.

[0065] In addition, the through hole in this invention is mainly to facilitate the installation of the limiting rivet on the closing or separating operating head.

[0066] In this invention, the closing operation head includes an upper closing operation head and a lower closing operation head; and the upper closing operation head and the lower closing operation head are connected by a linkage mechanism; this configuration allows the upper closing operation head and the lower closing operation head to have relative swing capability, so that when installing a new fuse tube, even if the fuse tube is not pushed completely along the central axis of the fuse, the normal installation of the fuse tube can be achieved by the swing of the upper closing operation head, avoiding hard interference during fuse tube installation.

[0067] The present invention facilitates the connection between the helical spring and the upper and lower operating heads by setting the helical groove. Attached Figure Description

[0068] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0069] Figure 1 This is a schematic diagram of the structure of the present invention.

[0070] Figure 2 This is a schematic diagram of the structure from a first perspective when the closing operation structure of the present invention does not have a closing connection structure.

[0071] Figure 3 This is a schematic diagram of the second perspective of the closed operation structure in this invention when no closed connection structure is provided.

[0072] Figure 4 This is a schematic diagram of the structure of the closing operation head in this invention.

[0073] Figure 5 This is a schematic diagram of the structure of the closing operation head of the present invention after the plastic guide sleeve is removed.

[0074] Figure 6 This is a schematic diagram of the structure when the upper operating head and the lower operating head are connected in this invention.

[0075] Figure 7 This is a schematic diagram of the structure of the closed lower operating head in this invention.

[0076] Figure 8 This is a schematic diagram of the structure of the closed upper operating head in this invention.

[0077] Figure 9 This is a top view of the upper operating head of the present invention when a closing connection structure is provided.

[0078] Figure 10 This is a schematic diagram of the structure of the present invention when the closed upper operating head is used in conjunction with the melting tube.

[0079] Figure 11 This is a schematic diagram of the structure of the present invention when the closing operation lever is equipped with a protective cover.

[0080] Figure 12 This is a schematic diagram of the structure of the present invention when the closing operating lever and the separating operating lever are equipped with a disassembly and assembly mechanism.

[0081] Figure 13 This is a top view of the separation operation head of the present invention.

[0082] Figure 14 This is a partial structural diagram of the present invention when the upper operating head is closed and connected to the snap-fit ​​edge plate.

[0083] Figure 15 This is a diagram showing the effect of the present invention when the upper operating head is closed and connected to the snap-fit ​​edge plate.

[0084] The markings in the above figures are all:

[0085] 1-1. Fuse tube operating device for fuse, 1-2. Closing operating structure, 1-3. Separating operating structure, 1-4. Fuse tube, 1-41. Protrusion, 1. Separating operating rod, 11. Threaded countersunk hole, 2. Closing operating head, 21. Upper closing operating head, 211. Lower closing operating head, 212. Conical protrusion, 213. Linkage countersunk hole, 214. Assembly spiral groove, 22. Closing countersunk groove, 23. Snap-fit ​​side plate, 231. Side plate body, 232. U-shaped plate, 24. Limiting rivet rod, 25. End countersunk groove, 26. Plastic guide sleeve, 27. Lateral through hole, 28. Assembly through hole, 29. Side countersunk groove, 210. Elastic element, 3. Closing operating rod, 31. Threaded rod, 12. Protective cover, 4. Separating connection structure, 41. Separating operating head, 42. Hanging protrusion, 43. Separating countersunk groove, 215. Lateral slot. Detailed Implementation

[0086] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0087] This invention provides a fuse tube operating device 1-1 for fuses, which is mainly used for the disassembly and assembly of fuse tubes 1-4 in fully enclosed fuses.

[0088] It mainly includes a closing operation structure 1-2 and a separating operation structure 1-3. The closing operation structure 1-2 is used to push and insert the new molten tube 1-4 during the installation process, and the separating operation structure 1-3 is used to hook and pull out the molten tube 1-4 during the removal process of the old molten tube 1-4.

[0089] In this invention, the closing operation structure 1-2 and the separating operation structure 1-3 can be used individually or in combination, and can be selected according to actual usage requirements.

[0090] The closing operation structure 1-2 mainly includes a closing operation rod 3, which is an insulated rod structure. One end of the closing operation rod is held by the operator, and the other end is connected to the closing operation head 2. The connection between the closing operation head 2 and the closing operation rod 3 can be either a fixed connection or a threaded connection, depending on the actual needs.

[0091] The closing operating head 2 is equipped with a closing connection structure for connecting the fuse tube 1-4 to be installed. The closing operating rod 3 can drive the fuse tube 1-4 to be installed into the fuse through the closing operating structure 1-2.

[0092] The separation operation structure 1-3 includes a separation operation rod 1, which is also an insulated rod structure. One end of the rod is for the operator to hold, and the other end is connected to a separation operation head 41. The connection method between the separation operation head 41 and the separation operation rod 1 can also be selected as needed.

[0093] The separation operating head 41 is provided with a separation connection structure 4 for connecting the fuse tubes 1-4 to be removed. The separation operating rod 1 can remove the fuse tubes 1-4 to be removed from the fuse through the separation operating head 41.

[0094] The specific construction of the closed connection structure includes a closed recess 22 at the end of the closing operation head 2. The closed recess 22 is a groove structure with one end open and the other closed, used to accommodate the insertion of the end of the molten tube 1-4 to be installed. A snap-fit ​​plate 23 is provided at the edge of the closed recess 22. The snap-fit ​​plate 23 can undergo elastic deformation and, under the action of deformation recovery force, presses against the side of the molten tube 1-4 to be installed, thereby achieving clamping and fixing of the molten tube 1-4. A snap-fit ​​plate 23 is provided on each opposite side of the closed recess 22. The two snap-fit ​​plates 23 are arranged opposite each other, symmetrically clamping the molten tube 1-4 from both sides to ensure balanced and stable clamping force.

[0095] In this invention, the closing groove 22 is located at the upper end of the closing operation head 2, that is, at the end away from the closing operation rod 3, and the snap-fit ​​side plate 23 is arranged on the outer side surface of the closing operation head 2.

[0096] The snap-fit ​​edge plate 23 mainly includes an edge plate body 231, which is a flat plate structure. The edge plate body 231 can be connected to the closing operation head 2 by fasteners. One end of the edge plate body 231 is connected to the closing operation head 2, and the other end of the edge plate body 231 is connected to a U-shaped plate 232. One end of the U-shaped plate 232 is connected to the edge plate body 231, and the other end of the U-shaped plate 232 is a free end. The opening of the U-shaped plate 232 faces outward, that is, towards the side away from the closing groove 22. This setting allows the outer arc surface of the U-shaped plate 232 to be pressed against the molten tube 1-4 to be installed during subsequent use. This setting facilitates the installation and subsequent detachment of the molten tube 1-4.

[0097] The U-shaped plate 232 has a U-shaped curved structure. Its curved part is used to contact the side of the molten tube 1-4 to be installed. The U-shaped plate 232 contacts the molten tube 1-4 to be installed. Through the elastic deformation capability of the snap-fit ​​edge plate 23, it can effectively squeeze and fix the molten tube 1-4 to be installed, while also facilitating the assembly and disassembly of the molten tube 1-4. The outer side of the closing operation head 2 is provided with a side groove 29. The side groove 29 and the closing groove 22 are distributed at intervals. The edge plate body 231 is installed in the side groove 29. The side groove 29 limits and fixes the edge plate body 231, ensuring that the snap-fit ​​edge plate 23 is stable in position and not easily shifted during repeated use.

[0098] The separation connection structure 4 includes a separation groove 43 located at the end of the separation operation head 41. The separation groove 43 is also a groove structure with one open end and one closed end, used to accommodate the insertion of the end of the fusion tube 1-4 to be disassembled. A hooking protrusion 42 is provided on the inner wall of the separation groove 43, extending inwards towards the interior of the separation groove 43, used to hook onto the existing protrusions 1-41 on the side wall of the fusion tube 1-4 to be disassembled. A hooking protrusion 42 is provided on each opposite side of the separation groove 43. The two hooking protrusions 42 are arranged opposite each other, hooking onto the fusion tube 1-4 from both sides simultaneously, ensuring the symmetry and stability of the hooking connection, and preventing the fusion tube 1-4 from tilting or falling off due to unilateral force during the extraction process.

[0099] In this invention, the mounting protrusion 42 and the separation operation head 41 can be an integral structure, and the mounting protrusion 42 can be formed by deformation of the separation operation head 41.

[0100] Of course, the hanging protrusion 42 can also be an additional protrusion structure 1-41. The hanging protrusion 42 and the inner wall of the separation sink 43 can be connected by fasteners or by welding; the specific choice can be made according to the actual production requirements.

[0101] Both the closed sinker 22 and the separating sinker 43 are equipped with limiting rivets 24. The limiting rivets 24 are arranged laterally inside the closed sinker 22 or the separating sinker 43, with a certain gap from the bottom surface of the closed sinker 22 or the separating sinker 43. The limiting rivets 24 provide longitudinal support and limit the insertion depth of the fusion tube 1-4 in the closed sinker 22 or the separating sinker 43, preventing the fusion tube 1-4 from being inserted too deeply and damaging the bottom structure of the sinker or affecting the venting operation.

[0102] Both the closing operating head 2 and the separating operating head 41 are provided with mounting through holes 28 for installing the limiting rivet 24. The mounting through holes 28 extend laterally through the interior of the operating head and are connected to the closing countersink 22 or the separating countersink 43. The limiting rivet 24 passes through the mounting through holes 28 and is fixed inside the countersink. The mounting through holes 28 provide a convenient channel and positioning reference for the installation of the limiting rivet 24. The limiting rivet and the mounting through holes 28 can be connected by threads or by interference fit; the specific choice can be made according to the needs.

[0103] Both the closing operating head 2 and the separating operating head 41 are provided with lateral through holes 27. The lateral through holes 27 penetrate the side wall of the operating head laterally and are connected to the closing sink 22 or the separating sink 43. The lateral through holes 27 serve as external connections. When abnormal situations such as melting or smoking occur during the assembly or disassembly of the fusion tube 1-4, the gas generated inside can be discharged from the inside of the closing operating head 2 or the separating operating head 41 through the lateral through holes 27, avoiding gas accumulation and potential safety hazards.

[0104] The closing operating head 2 comprises two parts: an upper closing operating head 21 and a lower closing operating head 211. The lower closing operating head 211 is connected to the closing operating rod 3, and the upper closing operating head 21 is connected to the lower closing operating head 211. The upper closing operating head 21 and the lower closing operating head 211 can swing relative to each other. The closing groove 22, the lateral through hole 27, and the limiting rivet 24 provided on the closing operating head 2 are all located on the upper closing operating head 21. That is, the upper closing operating head 21 is the part that directly contacts and cooperates with the melting tube 1-4, while the lower closing operating head 211 serves as a transition connector, connecting the upper closing operating head 21 and the closing operating rod 3 into one unit.

[0105] The upper closing operating head 21 is connected to the lower closing operating head 211 via a linkage mechanism. The linkage mechanism includes a countersunk hole 213 on the upper closing operating head 21 and a frustum-shaped protrusion 212 on the lower closing operating head 211. The countersunk hole 213 is a recessed hole on the rear end face of the upper closing operating head 21, and the frustum-shaped protrusion 212 is a protrusion 1-41 on the front end face of the lower closing operating head 211. The frustum-shaped protrusion 212 has a frustum shape, with its outer diameter gradually increasing from top to bottom. The upper closing operating head 21 is fitted onto the frustum-shaped protrusion 212 through the countersunk hole 213, and the frustum-shaped protrusion 212 is inserted into the countersunk hole 213, allowing the upper closing operating head 21 to freely swing relative to the lower closing operating head 211 within a certain angle range, thus achieving a relative swing function between the two.

[0106] The upper closing operating head 21 and the lower closing operating head 211 are connected by an elastic element 210. The elastic element 210 is arranged at the connection between the upper closing operating head 21 and the lower closing operating head 211. The basic function of the elastic element 210 is to connect the upper closing operating head 21 and the lower closing operating head 211. In addition, because the elastic element 210 has a certain deformation capacity, its arrangement will not affect the relative swing of the upper closing operating head 21 and the lower closing operating head 211.

[0107] In this invention, the elastic element 210 is a helical spring. The helical spring is sleeved at the connection between the upper closing operating head 21 and the lower closing operating head 211, and both ends of the helical spring are fixedly connected to the upper closing operating head 21 and the lower closing operating head 211, respectively. The helical spring provides elastic restoring force, enabling the upper closing operating head 21 to automatically return to its initial centered position after swaying. At the same time, the elastic force of the helical spring also plays a certain role in restraining and buffering the swaying amplitude of the upper closing operating head 21, preventing excessive swaying amplitude from affecting the installation accuracy.

[0108] The ends of the upper closing operating head 21 and the lower closing operating head 211 are provided with mounting spiral grooves 214. The mounting spiral grooves 214 are spiral grooves formed on the outer wall of the operating head. The helical spring is connected to the upper closing operating head 21 or the lower closing operating head 211 through the mounting spiral grooves 214. The structure of the mounting spiral grooves 214 matches the helix angle of the helical spring. The end of the helical spring can be screwed into the mounting spiral grooves 214 to achieve a fixed connection with the operating head. The connection method is simple and reliable, and facilitates assembly, disassembly and maintenance.

[0109] Both the closing operating head 2 and the separating operating head 41 are fitted with plastic guide sleeves 26. The plastic guide sleeves 26 cover the outside of the operating head and play a protective role. During the process of inserting or withdrawing the operating head into or out of the fuse, the plastic guide sleeves 26 can reduce the direct friction between the operating head and the fuse housing and avoid scratching the operating head or the surface of the fuse.

[0110] Both the closing operating lever 3 and the separating operating lever 1 are equipped with a protective cover 12. The protective cover 12 is fitted over the outside of the closing operating lever 3 or the separating operating lever 1, located at the end of the operating lever closest to the operator's hand. The protective cover 12 provides good isolation and protection, increasing the difficulty for the closing operating lever 3 or the separating operating lever 1 to axially detach from the operator.

[0111] At the same time, prevent foreign objects from sliding down the operating lever and falling into the operator's hands during operation.

[0112] Both the closing operating lever 3 and the separating operating lever 1 are insulated levers made of insulating materials, which have good electrical insulation properties and ensure the personal safety of operators during operation.

[0113] The end of the closing operating head 2 is also provided with an end countersunk groove 25, which is coaxially distributed with the closing countersunk groove 22, and the inner diameter of the end countersunk groove 25 is larger than the inner diameter of the closing countersunk groove 22. The end countersunk groove 25 is located at the outer end opening of the closing countersunk groove 22, forming a flared structure and a stepped platform, which can be used in conjunction with the boss on the melting tube 1-4 to control the insertion position of the melting tube 1-4.

[0114] The closing operating lever 3 and the separating operating lever 1 can be detachably connected together via a disassembly and assembly mechanism. This mechanism includes a threaded rod 31 at the end of the closing operating lever 3 and a threaded countersunk hole 11 at the end of the separating operating lever 1. The external thread of the threaded rod 31 matches the internal thread of the threaded countersunk hole 11. The closing operating lever 3 can be screwed into the threaded countersunk hole 11 at the end of the separating operating lever 1 via the threaded rod 31, thereby achieving an axial connection between the two operating levers and extending the operating distance. When extension is not required, the two operating levers can be separated by rotating in the opposite direction, making operation flexible and convenient.

[0115] During the closing operation, the closing operating lever 3 acts as a force transmission component, transmitting the thrust applied by the operator axially to the closing operating head 2. The closing groove 22 on the closing operating head 2 accommodates the end of the fuse tube 1-4, and the clamping plate 23 generates clamping force through its own elastic deformation to position and temporarily fix the fuse tube 1-4. The limiting rivet 24 controls the insertion depth of the fuse tube 1-4, ensuring that the end of the fuse tube 1-4 is in the correct position. The relative swing function between the upper closing operating head 21 and the lower closing operating head 211 allows the upper closing operating head 21 to adaptively adjust its angle even if there is a slight deviation between the axis of the fuse tube 1-4 and the axis of the fuse mounting hole during the pushing process, preventing hard interference or jamming of the fuse tube 1-4 during installation. The helical spring provides a restoring force, ensuring that the upper closing operating head 21 always tends to return to center after swinging, guaranteeing the stability and controllability of the operation. The plastic guide sleeve 26 reduces frictional resistance during the movement of the operating head into and out of the fuse, making the pushing smoother. When the operating height is high, the closing operating lever 3 can be connected to the threaded countersunk hole 11 of the separating operating lever 1 through the threaded rod 31, thereby extending the operating distance and enabling the operator to complete high-altitude operations while standing on the ground.

[0116] During the separation operation, the separation operating rod 1 acts as a force transmission component, transmitting the pulling force applied by the operator axially to the separation operating head 41. The separation groove 43 on the separation operating head 41 accommodates the end of the fuse tube 1-4 to be disassembled. The hook protrusion 42 engages with the existing protrusion 1-41 on the side wall of the fuse tube 1-4, achieving a reliable connection. The limiting rivet 24 controls the insertion depth of the fuse tube 1-4, ensuring that the hook protrusion 42 and the fuse tube protrusion 1-41 are in the correct relative position. The operator can pull the fuse tube 1-4 out of the fuse tube through the hook protrusion 42 by applying force outward along the axis through the separation operating rod 1. If abnormal gas is generated during the extraction process, the lateral through hole 27 can be promptly discharged to ensure operational safety. When the operating height is high, the separation operating rod 1 and the closing operating rod 3 can be connected and extended through the disassembly and assembly mechanism to adapt to different operating height requirements.

[0117] Instructions for use of fuse tube operating device 1-1:

[0118] Step 1: Preparations before operation;

[0119] The operator first confirms the specific location and number of the fuse to be operated, and records the installation height of the fuse and the surrounding environment.

[0120] Then check the model and specifications of the fuse tube 1-4 to be operated, including the outer diameter, length, end structure, and the position and size of the protrusion 1-41 on the side wall of the fuse tube 1-4. Take out the selected fuse using the fuse tube operating device 1-1 and check whether the closing operating head 2 and the separating operating head 41 of the device are intact, whether the clamping plate 23 has obvious deformation or cracks, whether the hook protrusion 42 is severely worn, and whether the limiting rivet 24 is firm and not loose. Compare the operating device with the fuse tube 1-4 to be operated, confirming that the inner diameter of the closing groove 22 can accommodate the end of the fuse tube 1-4, the clamping range of the clamping plate 23 matches the outer diameter of the fuse tube 1-4, and that the hook protrusion 42 of the separating groove 43 can effectively hook with the protrusion 1-41 on the side wall of the fuse tube 1-4. At the same time, check whether the insulation layer of the closing operating rod 3 and the separating operating rod 1 is intact, whether the shielding protective cover 12 is firm, and whether the plastic guide sleeve 26 is smooth and free of burrs.

[0121] This step is the foundation and prerequisite of the entire operation process. Through comprehensive inspection and confirmation, it ensures that the operating device used is compatible with the fusion tubes 1-4 to be operated in terms of specifications and dimensions. This avoids situations where the fusion tubes 1-4 cannot be installed into the operating head, are not securely clamped, fail to hook, or are even damaged due to incompatibility in subsequent operations. At the same time, checking the integrity of the device itself can promptly identify potential safety hazards and prevent safety accidents caused by device malfunctions during operation, thus ensuring the safe and smooth progress of the entire operation.

[0122] Step 2: Determine the operation method;

[0123] The operator determines the type of operation to be performed based on the actual operational needs. If a new fuse tube 1-4 needs to be installed into the fuse, then the closing operation mode should be selected.

[0124] If it is necessary to remove the old fuse tube 1-4 that has been disconnected or burned out from the fuse, select the separation operation mode. If both the old fuse tube 1-4 that needs to be removed and the new fuse tube 1-4 that needs to be installed are present on site, perform the separation operation first to remove the old fuse tube 1-4, and then perform the closure operation to install the new fuse tube 1-4.

[0125] This step serves as a directional guide for the operation process, clarifying the current operation's objective and task type, enabling operators to execute the corresponding steps systematically. Closing and disassembling operations differ fundamentally in their operating principles, operating head structure, force application direction, and techniques. Determining the operation method in advance prevents operators from confusing the two methods, ensuring the correct execution of subsequent steps. Furthermore, clarifying the order of removal followed by installation makes fuse maintenance more rational and orderly.

[0126] Step S1: Determine the closing operation height and operating space;

[0127] The operator stands below or near the fuse, looking up to observe the fuse's installation height. Simultaneously, the operator raises their arm to simulate the operation, determining if the combined length of the arm and the closing operating lever 3 is sufficient to allow the closing operating head 2 to smoothly reach the fuse tube 1-4 installation position. The operator observes the surrounding area for obstacles, such as adjacent electrical equipment, support frames, or pipelines, assessing whether the operating space is sufficient and whether it will affect the swing and force application of the operating lever. If the operator, standing in place, can smoothly reach the fuse tube 1-4 installation position with the single closing operating lever 3, and there is sufficient space for pushing, then the single closing operating structure 1-2 can be used directly for subsequent installation operations. If the fuse installation position is too high, the length of the single closing operating lever 3 is insufficient to allow the operating head to reach the installation position, or surrounding obstacles prevent the operator from approaching, and the operating lever cannot be pushed at a suitable angle, then the threaded rod 31 at the end of the closing operating lever 3 is aligned with the threaded countersunk hole 11 at the end of the separating operating lever 1, and tightened by rotating it to connect the two operating levers into an extended lever, using the extended total length to compensate for the insufficient height.

[0128] This step is a crucial pre-assessment step for the successful implementation of the closure operation. Accurately assessing the operating height and space before actual operation allows for early determination of whether the two operating levers need to be combined and extended. This avoids discovering insufficient lever length during the actual pushing process, forcing interruptions and reduced efficiency. Simultaneously, this assessment process helps operators plan the force application angle and standing position in advance, ensuring sufficient movement space for the operating levers during pushing and that the force direction aligns with the installation direction of the fusible tubes 1-4, thus improving the success rate of installation and the smoothness of operation.

[0129] Step S2: Connect the molten tube 1-4 to the closing operation structure 1-2;

[0130] The operator holds the middle part of the molten tube 1-4 to be installed with one hand and the end of the closing operating lever 3 near the operating head with the other hand. The operator pushes the molten tube 1-4, gradually inserting its end into the closed recess 22 until the end face of the molten tube 1-4 touches the limiting rivet 24 at the bottom of the closed recess 22. At this point, the limiting rivet 24 prevents the molten tube 1-4 from going any further, indicating that the molten tube 1-4 has been inserted to the preset correct depth. During the insertion of the molten tube 1-4, the clamping plates 23 on both sides of the closed recess 22 contact the outer wall of the molten tube 1-4. The clamping plates 23 are elastically deformed by the pressure of the molten tube 1-4, generating an elastic restoring force that acts on the outer wall of the molten tube 1-4, thereby clamping and fixing the molten tube 1-4.

[0131] The clamping plates 23 on both sides are symmetrically arranged, and clamping forces are applied simultaneously from both sides of the molten tube 1-4, so that the molten tube 1-4 is stably positioned in the middle of the closed sink 22 without eccentricity or tilting. At this time, the closing operating rod 3 is slightly shaken to confirm that the molten tube 1-4 has been firmly clamped and will not fall off the closing operating head 2, and at the same time to confirm that the axis of the molten tube 1-4 is basically consistent with the axis of the closing operating rod 3.

[0132] This step establishes the mechanical connection between the fuse tubes 1-4 and the operating device, and is the most crucial positioning and fixing step in the entire closing operation. The limiting rivet 24 ensures that the insertion depth of each fuse tube 1-4 in the closing operating head 2 remains consistent, thereby guaranteeing that the end of the fuse tube 1-4 is in the correct position in the fuse after subsequent pushing and installation, avoiding incomplete installation or damage to the internal structure of the fuse due to inconsistent insertion depth. The snap-fit ​​plate 23 utilizes its own elastic deformation to generate clamping force. This elastic clamping method provides sufficient holding force to ensure that the fuse tubes 1-4 do not fall off during pushing, and when separation is required after installation, only an appropriate reverse force needs to be applied to allow the snap-fit ​​plate 23 to elastically reset and release the fuse tubes 1-4, without causing scratches or indentations on the surface of the fuse tubes 1-4. The symmetrical clamping design on both sides ensures the centering of the fuse tubes 1-4 in the closing operating head 2, making subsequent pushing smoother.

[0133] Step S3: Push and install;

[0134] Based on the judgment result of step S1, if a single closing operating lever 3 is used, the operator should hold the gripping part of the closing operating lever 3 with both hands, keeping the axis of the closing operating lever 3 substantially aligned with the axis of the mounting holes of the fuse tubes 1-4 in the fuse. If a combined extended lever is used, the operator should hold the operating lever furthest from the closing operating head 2, i.e., the separating operating lever 1. The operator should push the operating lever forward with a uniform and stable force along the mounting direction of the fuse tubes 1-4 in the fuse, i.e., towards the inside of the fuse. During the pushing process, the upper closing operating head 21 in the closing operating head 2 will adaptively deflect relative to the lower closing operating head 211 through a linkage mechanism. Specifically, when the fuse tube 1-4 encounters slight resistance or angular deviation during its insertion into the fuse mounting hole, the reaction force at the end of the fuse tube 1-4 is transmitted to the upper closing operating head 21 through the closing countersunk groove 22. The linkage countersunk hole 213 of the upper closing operating head 21 undergoes a slight deflection relative to the frustum protrusion 212 of the lower closing operating head 211. The upper closing operating head 21 causes the fuse tube 1-4 to automatically adjust its angle, making the axis of the fuse tube 1-4 more aligned with the axis of the mounting hole. The helical spring is stretched or compressed when the upper closing operating head 21 deflects, generating an elastic force opposite to the deflection direction, making the deflection process smooth and controllable, without excessive swaying. The operator continues to apply forward force, gradually pushing the fuse tube 1-4 into the fuse along the mounting hole until a significant increase in resistance is felt or a mechanical impact sound is heard when the fuse tube 1-4 is in place, indicating that the fuse tube 1-4 has been fully inserted into the fuse and installed in place.

[0135] This step is the core execution link of the closing operation, directly determining whether the fuse tube 1-4 can be successfully installed into the fuse. The operator transmits the thrust to the fuse tube 1-4 through the operating rod, pushing the fuse tube 1-4 into the fuse along the mounting hole. The relative swing function between the closing upper operating head 21 and the closing lower operating head 211 is the most critical technical guarantee in this step. In actual operation, it is difficult for the operator to ensure that the axis of the operating rod is completely aligned with the axis of the mounting hole of the fuse tube 1-4. However, the fuse tube 1-4 itself has a certain length and rigidity. If a rigid connection structure is used, forcibly pushing it when there is a deviation in the axis will cause the fuse tube 1-4 to get stuck at the entrance of the mounting hole, making it impossible to continue pushing or to retract. The adaptive swing structure in this invention effectively solves this problem. The closing upper operating head 21 can automatically swing and adjust the angle according to the force, so that the fuse tube 1-4 always enters the mounting hole in the most suitable posture, greatly reducing the installation difficulty and improving the installation success rate. The presence of the helical spring ensures the smoothness and controllability of the yaw motion, preventing excessive yaw from causing the fuse tubes 1-4 to deviate from the correct direction.

[0136] Step S4: Close the operating head 2 to separate it from the melting tube 1-4;

[0137] After confirming that the fuse tube 1-4 is in place in step S3, the operator stops applying force forward and keeps the operating lever stable. The operator slowly and evenly pulls the closing operating lever 3 or the combined extension lever backward along the axis of the operating lever. In the initial stage of pulling backward, the locking plate 23 is still clamped on the outer wall of the fuse tube 1-4, causing the fuse tube 1-4 to move slightly backward. However, since the fuse tube 1-4 has been installed and fixed inside the fuse, it cannot move backward due to the resistance of the contacts or clamping structure inside the fuse. Therefore, the locking plate 23 undergoes further elastic deformation under the pressure of the reaction force from the fuse tube 1-4, and the locking plate 23 disengages from the outer wall of the fuse tube 1-4. At this point, the mechanical connection between the closing operating head 2 and the fuse tube 1-4 is completely released. The operator continues to pull the operating lever backward, removing the closing operating head 2 from the fuse, completing one full closing operation cycle. The operator visually inspects whether the ends of the fuse tube 1-4 are flush with the fuse housing or in the specified installation position, and gently touches the operating lever to confirm that the fuse tube 1-4 has not retracted with the operating head.

[0138] This step completes the final separation of the closed operating structure 1-2 from the fuse tube 1-4, marking the end of the entire installation operation. The clamping and releasing mechanism of the snap-fit ​​plate 23, utilizing elastic deformation, is fully demonstrated in this step. Because the snap-fit ​​plate 23 clamps the fuse tube 1-4 with elastic force rather than rigidly locking it, the pulling force applied by the operator during backward pulling allows the snap-fit ​​plate 23 to release the fuse tube 1-4. This release method requires no additional unlocking action from the operator, making the operation simple and quick. Simultaneously, since the fuse tube 1-4 is already fixed in the fuse, it will not move with the operating head during the release process, ensuring the stability of the installation position. The successful execution of this step signifies the complete completion of the fuse tube 1-4 installation operation.

[0139] Regarding the separation operation:

[0140] Step 1: Determine the separation operation height and operating space;

[0141] The operator stands beneath the fuse and observes the specific position of the fuse tube 1-4 to be removed within the fuse, specifically the length of the end of the old fuse tube 1-4 extending relative to the fuse housing surface. The operator raises their arm to simulate hooking and pulling actions, determining if the length of the single separating operating rod 1 is sufficient for the separating operating head 41 to contact the end of the fuse tube 1-4. The operator observes the surrounding space to determine if there is enough space for the operating rod to swing backward or adjust its angle during the removal process. If the separating operating head 41 can smoothly reach the end of the fuse tube 1-4 and the operator can apply force in a comfortable posture, then the single separating operating structure 1-3 can be used directly for subsequent removal operations. If the position of the fuse tube 1-4 is too high or the surrounding space is limited, making operation inconvenient, the separating operating rod 1 and the closing operating rod 3 are extended by connecting them via a threaded rod 31 and a threaded countersunk hole 11, increasing the operating distance and allowing the operator to operate from a suitable position on the ground. When extending the connection, ensure that the threaded connection between the two operating rods is tightened securely and will not loosen during operation.

[0142] This step corresponds to step S1 in the closing operation and is a necessary assessment step before the separation operation. Since removing the fuse tube 1-4 requires pulling it out of the fuse holder, the operating lever needs sufficient space to move backward during the operation. Therefore, assessing the operating space is particularly important. If insufficient space is found during the assessment, the operator can adjust their posture or choose different operating angles in advance to avoid interference between the operating lever and obstacles during the pulling process. Simultaneously, this step's determination of whether to combine and extend the operating lever ensures that the operator can perform the pulling operation in the most comfortable and effortless posture, improving dismantling efficiency.

[0143] Step 2: Hanging and fixing;

[0144] The operator holds the separation operating lever 1 or the combined extension lever and brings the separation operating head 41 close to the end of the molten tube 1-4 to be disassembled. Since the opening of the separation groove 43 faces the end of the molten tube 1-4, the operator aligns the separation groove 43 with the end of the molten tube 1-4 and pushes it closer to the molten tube, allowing the end of the molten tube 1-4 to enter the separation groove 43 until the end face of the molten tube 1-4 touches the limiting rivet 24 at the bottom of the separation groove 43. This indicates that the molten tube 1-4 has been inserted to the preset depth in the separation groove 43. After sensing that the molten tube 1-4 is in place, the operator rotates the separation operating lever 1 at a certain angle, typically 90 degrees, along the axial direction of the separation operating lever 1, i.e., the circumferential direction of the molten tube 1-4. During rotation, the hooking protrusion 42 on the inner wall of the separation tank 43 rotates synchronously with the separation operating head 41. As it rotates, the hooking protrusion 42 gradually engages with the existing protrusion 1-41 on the side wall of the molten tube 1-4 to be disassembled, achieving hook-and-loop engagement between the hooking protrusion 42 and the molten tube protrusion 1-41. After the operator completes the rotation, they slightly pull the separation operating rod 1 towards themselves to feel for any significant pulling resistance. If the molten tube 1-4 is felt to be hooked and tends to move outward with the operating rod, it indicates that the hooking protrusion 42 has successfully hooked onto the protrusion 1-41 of the molten tube 1-4, and the hook connection is complete. If no resistance is felt or the hooking protrusion 42 feels slipped off, the separation operating head 41 needs to be withdrawn and reinserted and rotated again until the hook connection is successful.

[0145] This step is the most critical technical step in the separation operation, directly determining whether a reliable connection can be established between the separation operation head 41 and the molten tube 1-4 to be disassembled. The hook-and-loop engagement between the hook protrusion 42 on the inner wall of the separation sink 43 and the original protrusion 1-41 on the side wall of the molten tube 1-4 is the mechanical basis for the separation operation structure 1-3 to pull out the molten tube 1-4. Unlike the connection established by elastic clamping force in the closing operation, the separation operation utilizes mechanical hooking force. This connection method has higher reliability and load-bearing capacity when subjected to axial tension, making it suitable for the pull-out operation. The limiting rivet 24 precisely controls the insertion depth of the molten tube 1-4 during insertion, ensuring that when the end face of the molten tube 1-4 touches the bottom, the hook protrusion 42 is exactly at the corresponding height position of the molten tube protrusion 1-41, providing correct axial positioning for subsequent rotation and hooking. The operation method of rotating a certain angle to make the hook protrusion 42 engage under the protrusion 1-41 is simple and effective. The operator can complete the hooking by rotating the operating rod, without the need for complicated alignment operations. The step of verifying the connection by gently pulling it after the connection is completed serves to confirm the connection and avoid wasting time due to connection failure during subsequent unplugging.

[0146] Step 3: Pull out fuse tubes 1-4;

[0147] After confirming that the hook protrusion 42 has been successfully hooked onto the molten tube protrusions 1-41, the operator grips the holding part of the separation operating rod 1 or the combined extension rod with both hands, adjusts their center of gravity, and stabilizes their stance. The operator then applies a uniform and continuous force outward to pull the operating rod along the axis of the molten tube 1-4, i.e., towards themselves.

[0148] This step is the core execution stage of the separation operation, where the old fuse tube 1-4 is removed from the fuse by the operator's application of force. The hook protrusion 42 bears the main axial tensile force during this process, reliably transmitting the operator's force to the fuse tube 1-4. Because the hook protrusion 42 is hooked onto the fuse tube protrusion 1-41, the greater the axial tensile force, the tighter the hook, preventing it from disengaging due to increased tension. This self-locking characteristic ensures the reliability of the removal process. Successful completion of this step signifies that the old fuse tube 1-4 has been successfully removed from the fuse.

[0149] Step 4: Finalize the separation operation;

[0150] After completely removing the old fuse tube 1-4 from the fuse, the operator holds the separation operating lever 1, suspending the separation operating head 41 in the air. The operator rotates the separation operating lever 1 in the opposite direction to that in step two, causing the hook protrusion 42 to rotate out from under the fuse tube protrusion 1-41 or from the groove, thus releasing the hook connection. The old fuse tube 1-4 is then removed from the separation operating head 41 and placed in a dedicated waste recycling container. The operator checks the fuse's internal mounting holes for any remaining fuse tube 1-4 fragments, metal shavings, or other foreign objects. If any are found, they are cleaned using a special tool. This completes the operation for one fuse tube 1-4 to be removed. If a new fuse tube 1-4 needs to be installed next, the operator follows the closing operation steps S1 to S4 described above. If no further operation is required, the operator separates the closing operating lever 3 and the separation operating lever 1, cleans the dust and dirt from the closing operating head 2 or the separation operating head 41, and returns the fuse to its designated storage location using the fuse tube operating device 1-1.

[0151] This step completes the finishing and cleaning work after the separation operation. The reverse rotation to release the hook and the forward rotation in step two form a complete action loop, ensuring that the separation head 41 can be cleanly and neatly separated from the old molten tubes 1-4 without interference or jamming.

[0152] Based on the above statements, the overall technical effects of the present invention are as follows:

[0153] Specialized operations for the installation and removal of the fusible tube 1-4 have been achieved. By setting up the closing operation structure 1-2 and the separating operation structure 1-3 respectively, dedicated operating heads and connection methods are provided for two different working conditions of installing and removing the fusible tube 1-4. The closing operation head 2 realizes the installation and pushing through the elastic clamping of the snap-fit ​​side plate 23, and the separating operation head 41 realizes the removal and pulling through the hook of the hanging protrusion 42. The two operation methods are highly targeted and reliable, effectively avoiding problems such as slippage and unstable clamping that are easy to occur when using general tools.

[0154] The adaptability and fault tolerance of the fuse tube 1-4 installation have been improved. The closing operating head 2 adopts a split design of the upper closing operating head 21 and the lower closing operating head 211. The two are connected by the cooperation of the cone protrusion 212 and the linkage countersunk hole 213 to achieve relative swing function. With the elastic reset of the helical spring, even if there is a slight deviation between the axis of the fuse tube 1-4 and the axis of the fuse mounting hole during the installation process, the upper closing operating head 21 can automatically swing to adapt, ensuring that the fuse tube 1-4 can be pushed in smoothly. This avoids jamming and hard interference caused by rigid connection, greatly reduces the installation difficulty and improves the installation success rate.

[0155] This design allows for flexible expansion of the operating distance. The closing operating lever 3 and the separating operating lever 1 are detachably connected via a threaded rod 31 and a threaded countersunk hole 11. The two operating levers can be used individually or in combination. This design enables the same device to adapt to the operating needs of fuses at different heights. Operators can flexibly choose the operating method according to the actual situation. When the fuse is located at a high position, the two operating levers can be connected and extended, allowing the operator to complete the operation while standing on the ground without the need for ladders or other auxiliary climbing equipment. This improves work efficiency and ensures operational safety.

[0156] The safety and reliability of the operation are enhanced. The closed connection structure uses the elastic clamping of the U-shaped plate 232 to fix the fusion tube 1-4. The special structure of the U-shaped plate 232 provides sufficient clamping force while facilitating the insertion and removal of the fusion tube 1-4, ensuring reliable fixation during installation and smooth separation after installation. The separation connection structure 4 uses the hook-and-loop engagement between the hook protrusion 42 and the original protrusion 1-41 of the fusion tube 1-4, ensuring a firm and reliable connection and preventing disengagement during removal. The limiting rivet 24 precisely controls the insertion depth of the fusion tube 1-4, avoiding positioning deviations or structural damage caused by improper insertion depth. The side through hole 27 provides a channel for gas discharge in abnormal situations, eliminating safety hazards. The insulating rod, shielding cover 12, and plastic guide sleeve 26 provide multiple safety protections for the operator.

[0157] The through hole 28 facilitates the installation of the limiting rivet 24, the side groove 29 facilitates the positioning and fixing of the snap-fit ​​plate 23, and the spiral groove 214 facilitates the connection between the spiral spring and the operating head. The overall structural design fully considers the assembly processability and maintenance convenience, reducing the manufacturing difficulty and the cost of use and maintenance.

[0158] The operating procedures are clear, standardized, and easy to master. The usage method of this device covers the complete process from pre-operation inspection, operation mode selection, operation height judgment, installation of fuse tubes 1-4 to removal of fuse tubes 1-4. The steps are logically clear and in a reasonable sequence. Operators can complete the installation and removal of fuse tubes 1-4 by following the steps. The learning cost is low and the risk of operational errors is small, making it suitable for widespread application in the field of power maintenance.

[0159] Combination Figure 9 , Figure 14 as well as Figure 15As shown, the closing operating head 2 of the present invention includes a closing upper operating head 21; in the present invention, a closing groove 22 is provided at the upper end of the closing upper operating head 21, and the closing groove 22 is coaxially distributed with the closing upper operating head 21; the closing groove 22 is equivalent to adding a groove structure to the top of the closing upper operating head 21; it is convenient for placing and positioning the fusion tube; and the snap-fit ​​plate 23 is arranged on the outer side of the closing upper operating head 21; a plastic guide sleeve 26 is installed on the outer side of the closing upper operating head 21; the snap-fit ​​plate 23 of the present invention is equivalent to being arranged between the closing upper operating head 21 and the plastic guide sleeve 26. In order to facilitate the arrangement of the snap-fit ​​plate 23, a side groove 29 is required to be opened on the outer side of the closing upper operating head 21; the outer side of the closing upper operating head 21 is the outer circumferential surface close to the inner side of the plastic guide sleeve 26; in the present invention, the side groove 29 is provided on the closing upper operating head 21, and is equivalent to being arranged longitudinally; that is, extending along the height direction of the closing upper operating head 21; mainly forming a plug-in groove structure; facilitating the snap-fit ​​plate 23 The installation on the closing upper operating head; the side recess 29 can be a U-shaped recess or a side-opening groove, essentially as long as it can realize the installation of the snap-fit ​​plate 23; at the same time, in order to press and fix the snap-fit ​​plate 23 to be installed molten tube, a side slot 215 is required at the upper end of the closing upper operating head in this invention; each snap-fit ​​plate 23 corresponds to a side slot 215; the side slot 215 is mainly used for the connection between the closing recess 22 and the outside of the closing upper operating head, and is also used for closing. The connection between the recess 22 and the side recess 29 allows the upper U-shaped plate 232 of the snap-fit ​​edge plate 23 to extend into the closed recess 22 area, facilitating the subsequent lateral compression and fixing of the fusion tube to be installed. In this invention, the snap-fit ​​edge plate 23 mainly includes an edge plate body 231, which is mainly a flat plate structure. During installation, the edge plate body 231 is inserted into the side recess and then fastened with fasteners, such as rivets. The edge plate body 231 is connected to the U-shaped plate 232. One end of the U-shaped plate 232 is connected to the side plate body 231, and the other end of the U-shaped plate 232 is a free end. The present invention requires the U-shaped plate 232 to extend to the closed sink 22 area through the lateral slot 215; that is, in the normal non-use state, the horizontal projection of the U-shaped plate 232 and the horizontal projection of the closed sink 22 partially coincide. With this setting, when the snap-fit ​​side plate 23 is squeezed by the molten tube and deformed during subsequent use, the reaction force controls the U-shaped plate 232 to squeeze the side of the molten tube, thereby realizing the lateral squeezing and fixing of the molten tube.

[0160] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A fuse tube operating device for a fuse, characterized in that, Includes closing operation structures and / or opening operation structures; The closing operation structure includes a closing operation rod; the end of the closing operation rod is provided with a closing operation head; the closing operation head is provided with a closing connection structure for connecting the molten tube to be installed; The separation operation structure includes a separation operation rod, and a separation operation head on the separation operation rod; the separation operation head is provided with a separation connection structure for connecting the molten tube to be disassembled; The closing operating lever can drive the fuse tube to be installed into the fuse through the closing operating structure; The separation lever can remove the fuse tube to be removed from the fuse via the separation operation head; The closed connection structure includes a closed groove provided at the end of the closed operation head, and a snap-fit ​​plate is provided at the edge of the closed groove; the snap-fit ​​plate can be pressed against the side of the molten tube to be installed. The closed settling tank is provided with a snap-fit ​​edge plate on each of its opposite sides; The separation connection structure includes a separation sink provided at the end of the separation operation head; the inner wall of the separation sink is provided with a hanging protrusion; The separation trough is provided with a hanging protrusion on each of its opposite sides; Both the closed sink and the separated sink are equipped with limiting rivets; Both the closing and separating operating heads are provided with assembly through holes for installing limit rivets; the assembly through holes can communicate with the closing or separating sink. Both the closing operation head and the separating operation head are provided with lateral through holes; the lateral through holes can be connected to the closing sink or the separating sink. The closing operation head includes an upper closing operation head and a lower closing operation head; the upper closing operation head and the lower closing operation head can swing relative to each other; the lower closing operation head is connected to the closing operation rod; the upper closing operation head is connected to the lower closing operation head; the closing groove, the lateral through hole and the limiting rivet rod provided on the closing operation head are all provided on the upper closing operation head.

2. The fuse tube operating device for a fuse according to claim 1, characterized in that, The snap-fit ​​edge plate includes an edge plate body; one end of the edge plate body is connected to the closing operation head, and the other end is connected to a U-shaped plate; one end of the U-shaped plate is connected to the edge plate body, and the other end extends freely; the snap-fit ​​edge plate is deformable. The side of the closed operating head is provided with a side sink groove; the side sink groove and the closed sink groove are distributed at intervals; the side plate body is installed in the side sink groove.

3. The fuse tube operating device for a fuse according to claim 1, characterized in that, The upper closing operating head is connected to the lower closing operating head via a linkage mechanism; The linkage mechanism includes a linkage countersunk hole provided on the upper closing operating head and a conical protrusion provided on the lower closing operating head. The upper operating head is fitted onto the conical protrusion via a countersunk hole; the upper operating head and the lower operating head are also connected by an elastic element.

4. The fuse tube operating device for a fuse according to claim 3, characterized in that, The elastic element is arranged at the connection between the upper closing operating head and the lower closing operating head; The elastic element is a helical spring; the helical spring is sleeved at the connection between the upper closing operating head and the lower closing operating head, and both ends of the helical spring are respectively connected to the upper closing operating head and the lower closing operating head.

5. The fuse tube operating device for a fuse according to claim 4, characterized in that, The upper and lower closing operating heads are provided with mounting spiral grooves at their ends; the spiral spring is connected to the upper or lower closing operating head through the mounting spiral grooves.

6. The fuse tube operating device for a fuse according to claim 1, characterized in that, Both the closing and separating operating heads are fitted with plastic guide sleeves; Both the closing and separating operating levers are equipped with protective covers; the protective covers are fitted onto the closing or separating operating levers; both the closing and separating operating levers are insulating rods. The end of the closing operation head is provided with an end groove; the end groove and the closing groove are coaxially distributed; the inner diameter of the end groove is larger than the inner diameter of the closing groove.

7. The fuse tube operating device for a fuse according to claim 1, characterized in that, The closing operating lever and the separating operating lever can be connected by a disassembly and assembly mechanism; the disassembly and assembly mechanism includes a threaded rod provided at the end of the closing operating lever and a threaded countersunk hole provided at the end of the separating operating lever; the closing operating lever can be connected to the threaded countersunk hole at the end of the separating operating lever through the threaded rod.

8. A method of using the fuse tube operating device as described in any one of claims 1-7, characterized in that, The method of use includes the following steps: Step 1: Determine the model and size of the fuse and fuse tube to be operated, and check and confirm that the selected fuse tube operating device matches the specifications of the fuse tube to be operated. Step 2: After completing Step 1, determine the operation mode of the fusible link: The operation of a fusible link includes closing and opening operations; The closing operation is used to install a new fuse tube in the fuse; The closing operation has the following steps: Step S1: Determine the operating height and operating space of the melting tube; If the operator can reach the installation position of the molten tube to be installed using a single closed operating structure, then the closed operating structure can be used directly. If operation is not possible due to height or space limitations, the closed operation structure and the separated operation structure will be connected by a disassembly and assembly mechanism to extend the operation distance. Step S2: Connect the molten tube to be loaded to the closing operation structure; Insert the end of the molten tube to be installed into the closed groove in the closing operation head, so that the snap-fit ​​plates on both sides of the closed groove can use their own elastic deformation to clamp the molten tube to be installed on both sides, thereby positioning and temporarily fixing it. Step S3: Push and install; Hold the closing or opening lever and apply force along the installation direction of the fuse tube in the fuse to push the fuse tube smoothly into the fuse until it is installed in place; Step S4: After step S3 is completed, pull the closing or separating operating lever in the opposite direction to separate the closing operating structure from the molten tube to be installed; at this point, the installation of one molten tube is complete. The disconnection operation is used to remove the disconnected fuse tube in the fuse; The separation operation has the following steps: Step 1: Determine the operating height of the fusion tube to be disassembled; Determine the operating height and operating space of the molten tube to be disassembled; if the operator can reach the disassembly position of the molten tube using a single separation operation structure, then use the separation operation structure directly. If operation is not possible due to height or space limitations, the separation operation structure and the closing operation structure will be connected by a disassembly and assembly mechanism to extend the operation distance. Step 2: Hook and fix; bring the separation operation head at the end of the separation operation rod close to the molten tube to be disassembled, so that the end of the molten tube enters the separation sink; then rotate the separation operation structure; so that the hook protrusion on the inner wall of the separation sink hooks onto the protrusion on the molten tube to be disassembled; thus achieving hook connection; Step 3; Remove the fuse tube; Hold the release lever or the closing lever and apply force outward along the axis of the fuse tube to pull the fuse tube out of the fuse. Step 4: After completing Step 3, the operation of one fusible tube to be disassembled is completed. If a new fusible tube needs to be installed, repeat the above closing operation.

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