A drop-out fuse grounding hanging device and a method for using the same

Abstract

This invention relates to the field of fuse grounding connection technology, specifically a drop-out fuse grounding connection device and its usage method. The device includes a main body, a spring-loaded clamping device, an insulating rod, and a U-shaped hanging ring. The main body comprises a positioning plate, a fixing plate, a base, and a fixing seat. The front side of the positioning plate has a through-groove, and a fixing plate perpendicularly connected to the positioning plate is fixed to the rear bottom of the positioning plate. A U-shaped hanging ring is movably connected to the fixing plate. The base is fixedly connected to the front side of the positioning plate. The inner side of the base has an upward-opening limiting groove communicating with the mounting groove, and the front bottom of the base has an opening communicating with the inner side of the limiting groove. This invention, through the design of the main body, clamping tongue, torsion spring, and support mechanism, provides a complete grounding connection device structure that solves the problems of versatility, reliability, and convenience. Furthermore, in this invention, the torsion spring, clamping tongue, and support mechanism are all connected by pin hinges, resulting in a compact structure, reliable mechanical operation, and long service life.

Description

Technical Field

[0001] This invention relates to the field of fuse grounding connection technology, and in particular to a drop-out fuse grounding connection device and its usage method. Background Technology

[0002] Drop-out fuses are the most commonly used short-circuit protection switches for 10kV distribution line branches and distribution transformers. Installed on 10kV distribution line branches, drop-out fuses can reduce the scope of power outages. Because they have a clearly visible disconnect point, they function as disconnecting switches, creating a safe working environment for lines and equipment under maintenance. Installed on distribution transformers, they can serve as the main protection for the transformers. They are economical, easy to operate, and highly adaptable to outdoor environments, and are widely used on the primary side of 10kV distribution lines and distribution transformers for protection and equipment switching operations, thus gaining widespread application.

[0003] When a drop-out fuse is in operation, the moving contacts at both ends of the fuse tube are secured by the fuse wire (fusible element). After the upper moving contact is pushed into the protruding "duckbill" part, the upper stationary contact, made of phosphor bronze or similar material, presses against the upper moving contact, thus firmly locking the fuse tube in the "duckbill." When a short-circuit current passes through the fuse and melts, an electric arc is generated. The steel paper tube lining the fuse tube generates a large amount of gas under the action of the arc. Because the upper end of the fuse tube is sealed, the gas is ejected to the lower end, extinguishing the arc. As the fuse wire melts, the upper and lower moving contacts of the fuse tube lose the securing force of the fuse wire. Under the action of the fuse tube's own weight and the spring plates of the upper and lower stationary contacts, the fuse tube quickly falls, breaking the circuit and disconnecting the faulty section of the line or the faulty equipment.

[0004] Currently, during power line maintenance, when replacing drop-out fuses, temporary grounding is required at their lower part to ensure the safety of operators. Existing grounding connection devices or methods generally have the following problems:

[0005] 1. Poor versatility: There are two types of drop-out fuses on the market, one new and one old, with different U-shaped mounting groove dimensions and structures. Existing grounding devices usually only support one type, requiring power maintenance units to equip themselves with multiple tools, increasing costs and management complexity.

[0006] 2. Unreliable connection: After some devices are connected, the clamping force between them and the fuse contacts is insufficient or cannot be adjusted, which can easily lead to poor contact due to wind vibration, slight collisions, etc., posing a safety hazard of unreliable grounding.

[0007] 3. Cumbersome operation and risk: Traditional methods may require operators to work at height or use auxiliary tools for fixation, which is cumbersome. In addition, there is a risk of the device accidentally falling off during installation and disassembly, which poses a threat to the safety of personnel and equipment.

[0008] 4. Inconvenient connection between insulating rod and main body: The connection between the insulating rod and the main body of some devices is complicated, requiring multiple rotations or additional locking operations, which is extremely inconvenient when working at heights and affects work efficiency. Summary of the Invention

[0009] This invention provides a grounding connection device for drop-out fuses and its usage method, which overcomes the shortcomings of the prior art and effectively solves the problems of poor versatility, reliability and convenience of existing grounding connection devices for drop-out fuses.

[0010] To solve the above problems, one of the technical solutions of the present invention is achieved by means of the following: a drop-out fuse grounding connection device, comprising a main body, an elastic clamping device, an insulating rod and a U-shaped hanging ring;

[0011] The main body includes a positioning plate, a fixing plate, a base, and a fixing seat. The front side of the positioning plate has a through mounting groove. The bottom rear side of the positioning plate is fixed with a fixing plate that is perpendicular to the positioning plate. A U-shaped hanging ring is movably connected to the fixing plate. The base is fixedly connected to the front side of the positioning plate. The inner side of the base has a limiting groove that opens upward and communicates with the mounting groove. The front bottom side of the base has an opening that communicates with the inner side of the limiting groove. The fixing plate and the bottom of the base are fixedly connected with a fixing seat. An insulating rod is movably connected to the bottom of the fixing seat.

[0012] The elastic clamping device includes a support mechanism, a pressure tongue, a torsion spring, and hanging rods. An arc-shaped pressure tongue is hinged to the inner side of the limiting groove, with the arc-shaped opening facing the front of the limiting groove. A torsion spring locking groove with a forward-opening opening is provided on the front side of the pressure tongue. A torsion spring is hinged to the inner side of the limiting groove facing the arc-shaped opening of the pressure tongue. The fixed end of the torsion spring is fixedly connected to the front side inside the limiting groove, and the moving end of the torsion spring is locked in the torsion spring locking groove. The upper end of the pressure tongue extends to the top of the base, and hanging rods are fixedly connected to both sides of the pressure tongue located above the base. A support mechanism that can abut against the rear side of the pressure tongue after rotation is hinged to the inner side of the mounting groove.

[0013] The aforementioned support mechanism includes a long protruding column and a short protruding column that are perpendicular to each other and integrally formed. The connection between the long protruding column and the short protruding column is provided with a long through hole running from left to right. The positioning plate on the left and right sides of the upper part of the mounting groove is provided with an ear plate protruding from the positioning plate. A first pin is fixedly connected between the two ear plates and rotatably connected to the inside of the long through hole. After the long protruding column rotates 90° outside the first pin, it can abut against the back of the pressure tongue.

[0014] The upper outer side of the aforementioned U-shaped hanging ring is threaded, and the fixing plate corresponding to the position of the U-shaped hanging ring is provided with a through hole running vertically. The upper outer side of the U-shaped hanging ring is threaded with a lower nut. The upper end of the U-shaped hanging ring above the lower nut passes through the through hole at the corresponding position from bottom to top and is located on the upper side of the fixing plate. The outer side of the U-shaped hanging ring corresponding to the upper side of the fixing plate is threaded with an upper nut.

[0015] The base limiting groove corresponding to the torsion spring position is provided with a second pin distributed in the left and right direction, and the torsion spring is fitted on the outside of the second pin.

[0016] The base limiting groove at the bottom of the pressure tongue is provided with a third pin distributed in the left and right direction, and the pressure tongue is fitted on the outside of the third pin.

[0017] The aforementioned insulating rod includes an insulating rod head and an epoxy resin tube. The insulating rod head includes an integrally formed upper cylinder and a lower cylinder with a diameter that is smaller at the top and larger at the bottom. The bottom of the lower cylinder has a cylindrical mounting groove with an opening facing downwards. An epoxy resin tube is fixedly installed inside the cylindrical mounting groove. Two locking pins are symmetrically arranged radially on the outer side of the upper cylinder. Two blind holes with openings facing upwards are arranged radially at intervals on the top of the upper cylinder. A ball catcher shell is fixedly installed in each blind hole. The ball catcher shell has a spring mounting cavity inside. The spring mounting cavity contains a spring and a ball catcher. The top of the spring mounting cavity has an outlet. The ball catcher is close to the outlet, and the diameter of the outlet is smaller than the diameter of the ball catcher. The ball catcher is pressed tightly against the outlet by the spring.

[0018] The bottom of the fixing base has a downward-opening circular groove that matches the outer diameter of the upper cylinder. The bottom of the inner side of the circular groove has two downward-opening hemispherical grooves that correspond to the contact beads. When the insulating rod is connected to the fixing base, the contact beads are located inside the corresponding hemispherical grooves. The lower outer side of the fixing base has an "L"-shaped slot that communicates with the circular groove and corresponds to the locking post. When the insulating rod is connected to the fixing base, the locking post is located inside the corresponding slot by rotating the insulating rod. The straight line where the two contact beads are located forms an angle with the straight line where the two hemispherical grooves are located, and the angle is 25°.

[0019] The aforementioned hanging rod is cylindrical.

[0020] The second technical solution of the present invention is achieved through the following method: a method for using a drop-out fuse grounding connection device, the method comprising the following steps:

[0021] When performing the splicing operation, first connect the insulating rod to the fixed base;

[0022] Manually move the support mechanism to press it against the pressure tongue, squeezing the pressure tongue and torsion spring, causing the hanging rod of the pressure tongue to open, thus moving the hanging rod away from the position of the positioning plate;

[0023] Lift the insulating rod and align it with the U-shaped groove of the fuse that needs to be grounded. The U-shaped groove pushes the pressure tongue, causing the support mechanism to separate from the pressure tongue. The support mechanism automatically resets under the action of gravity, and the pressure tongue presses down on the fuse under the action of the torsion spring, forming a reliable electrical contact.

[0024] After the connection is secure, remove the insulating rod from the bottom of the mounting base to complete the connection.

[0025] After the hanging operation is completed, reconnect the insulating rod to the fixed base, lift the insulating rod upwards with force to remove the hanging rod from the U-shaped hanging groove, and remove the entire device.

[0026] The aforementioned manual actuation support mechanism, which abuts against the pressure tongue, includes:

[0027] Under natural conditions, the support mechanism is in a state of vertical downward movement of the long convex column under the action of gravity.

[0028] When performing the splicing operation, manually move the long protruding post to rotate it 90° so that it abuts against the back of the pressure tongue.

[0029] The above-mentioned connection between the insulating rod and the fixed base includes:

[0030] Insert the upper cylinder into the circular groove of the fixing base, align the outer pin of the upper cylinder with the groove on the fixing base, and forcefully push the upper cylinder into the circular groove of the fixing base through the epoxy resin tube. Rotate it 25° so that the pin is locked inside the L-shaped groove. At this time, the ball is located in the hemispherical groove, completing the connection between the insulating rod and the fixing base.

[0031] This invention utilizes a rotatable support mechanism to change the initial state of the pressure tongue in different working positions (such as pressing against the pressure tongue or hanging naturally), thereby achieving adaptive connection of different types of drop-out fuses (new and old types). This significantly reduces the procurement and management costs of tools. Furthermore, during connection, the support mechanism can automatically reset under its own weight, simplifying operation. In addition, this invention provides continuous clamping force through a torsion spring, combined with the pressure tongue structure, ensuring tight contact between the device and the fuse U-shaped groove after connection, resulting in low grounding resistance, high safety performance, and reliable electrical connection.

[0032] This invention provides a complete grounding connection device structure that addresses the issues of versatility, reliability, and convenience through the design of the main body, pressure tongue, torsion spring, and support mechanism. Furthermore, in this invention, the torsion spring, pressure tongue, and support mechanism are all connected by pin hinges, resulting in a compact structure, reliable mechanical operation, and long service life. Attached Figure Description

[0033] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of the present invention.

[0035] Figure 2 for Figure 1 A schematic diagram of the rear view structure.

[0036] Figure 3 for Figure 1 A schematic diagram of the right-side structure.

[0037] Figure 4 for Figure 1 A top-view structural diagram.

[0038] Figure 5 This is a front-view stereoscopic structural diagram of Embodiment 1 of the present invention.

[0039] Figure 6 This is a schematic diagram of the left sectional view of Embodiment 1 of the present invention.

[0040] Figure 7 This is a three-dimensional structural diagram of the main body in Embodiment 1 of the present invention.

[0041] Figure 8 This is a three-dimensional structural diagram of the insulating rod in Embodiment 1 of the present invention.

[0042] Figure 9 This is a schematic diagram of the fixed base from below and the insulating rod from above in Embodiment 1 of the present invention.

[0043] Figure 10 This is a three-dimensional structural diagram of the fixing seat in Embodiment 1 of the present invention.

[0044] Figure 11 for Figure 6 Enlarged view of point A in the middle.

[0045] Figure 12 This is a schematic diagram of the connection structure between the old-style drop-out fuse and the device of the present invention in Embodiment 1 of the present invention.

[0046] Figure 13 This is a three-dimensional structural diagram showing the connection between the old-style drop-out fuse and the device of the present invention in Embodiment 1 of the present invention.

[0047] Figure 14 This is a three-dimensional structural diagram showing the connection between the old-style drop-out fuse and the device of the present invention in Embodiment 1 of the present invention.

[0048] Figure 15 This is a schematic diagram of the connection structure between the novel drop-out fuse and the device of the present invention in Embodiment 1 of the present invention.

[0049] Figure 16 This is a three-dimensional structural diagram showing the connection between the novel drop-out fuse and the device of the present invention in Embodiment 1 of the present invention.

[0050] Figure 17 This is a three-dimensional structural diagram showing the connection between the novel drop-out fuse and the device of the present invention in Embodiment 1 of the present invention.

[0051] In the diagram: 1-U-shaped hanging ring, 2-positioning plate, 3-fixing plate, 4-base, 5-fixed seat, 6-limiting groove, 7-opening, 8-pressure tongue, 9-torsion spring, 10-hanging rod, 11-torsion spring locking groove, 12-long protrusion, 13-short protrusion, 14-ear plate, 15-first pin, 16-lower nut, 17-upper nut, 18-second pin, 19-third pin, 20-epoxy resin tube, 21-upper cylinder, 22-lower cylinder, 23-locking post, 24-touching ball, 25-circular groove, 26-locking groove, 27-new type drop-out fuse, 28-old type drop-out fuse, 29-touching ball housing, 30-spring mounting cavity, 31-spring, 32-outlet, 33-hemispherical groove, a-angle. Detailed Implementation

[0052] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0053] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0054] Example 1: As Figure 1-10 As shown, this embodiment of the invention discloses a grounding connection device for a drop-out fuse, including a main body, an elastic clamping device, an insulating rod, and a U-shaped hanging ring 1;

[0055] The main body includes a positioning plate 2, a fixing plate 3, a base 4, and a fixing seat 5. The front side of the positioning plate 2 has a through mounting groove. The bottom rear side of the positioning plate 2 is fixed with a fixing plate 3 that is perpendicularly connected to the positioning plate 2. A U-shaped hanging ring 1 is movably connected to the fixing plate 3. The base 4 is fixedly connected to the front side of the positioning plate 2. The inner side of the base 4 has a limiting groove 6 that opens upward and communicates with the mounting groove. The bottom front side of the base 4 has an opening 7 that communicates with the inner side of the limiting groove 6. The bottom of the positioning plate 2 and the base 4 are fixedly connected with the fixing seat 5. An insulating rod is movably connected to the bottom of the fixing seat 5.

[0056] The elastic clamping device includes a support mechanism, a pressure tongue 8, a torsion spring 9, and a hanging rod 10. An arc-shaped pressure tongue 8 is hinged to the inner side of the limiting groove 6, with the arc-shaped opening facing the front of the limiting groove 6. A torsion spring locking groove 11 with a forward opening is provided on the front side of the pressure tongue 8. A torsion spring 9 is hinged to the inner side of the limiting groove 6 with the arc-shaped opening of the pressure tongue 8 facing it. The fixed end of the torsion spring 9 is fixedly connected to the front side of the inner side of the limiting groove 6, and the moving end of the torsion spring 9 is locked in the torsion spring locking groove 11. The upper end of the pressure tongue 8 extends above the base 4. Hanging rods 10 are fixedly connected to both the left and right sides of the pressure tongue 8 located above the base 4. A support mechanism that can abut against the rear side of the pressure tongue 8 after rotation is hinged to the inner side of the mounting groove.

[0057] The opening 7 on the front bottom of the base 4, which communicates with the inner side of the limiting groove 6, facilitates the rotation of the pressure tongue 8. When this device is used for grounding connection of the new type drop-out fuse 27, such as... Figure 15-17 As shown, no support mechanism is needed to support the pressure tongue 8 to achieve the hanging operation. When used for grounding connection of the old-style drop-out fuse 28, as... Figure 12-14 As shown, a support mechanism is required to support the pressure tongue 8. That is, the support mechanism holds the pressure tongue 8 in place before the connection is made, thereby achieving the effect of connecting different types of drop-out fuses.

[0058] like Figure 1-10 As shown, the support mechanism includes a long protruding column 12 and a short protruding column 13 that are perpendicular to each other and integrally formed. A long, through-hole is provided at the connection between the long protruding column 12 and the short protruding column 13. Ear plates 14 protruding from the positioning plates 2 are provided on the rear side of the positioning plates 2 corresponding to the upper left and right sides of the mounting groove. A first pin 15, rotatably connected to the inner side of the long, through-hole is fixedly connected between the two ear plates 14. After rotating 90° outside the first pin 15, the long protruding column 12 can abut against the rear side of the pressure tongue 8. Thus, the support mechanism is hinged to the first pin 15, allowing the support mechanism to rotate around the first pin 15. In its natural state, the long protruding column 12 of the support mechanism droops due to its own weight.

[0059] In use, for the old-style drop-out fuse 28, the operator moves the short protrusion 13 of the support mechanism by using the insulating rod to rotate it 90°. At this time, the long protrusion 12 of the support mechanism will press against the rear side of the pressure tongue 8, so that the hanging rod 10 of the pressure tongue 8 is at a preset opening angle to adapt to the size of the U-shaped groove of the old-style fuse. For the new-style drop-out fuse 27, the above process is not required, and it can be directly hung and connected. That is, the support mechanism does not participate in the limiting, and only the torsion spring 9 provides the clamping force.

[0060] like Figure 1-4 As shown in Figures 6 and 9-10, the upper outer side of the U-shaped hanging ring 1 is threaded. The fixing plate 3 corresponding to the position of the U-shaped hanging ring 1 has a through hole running vertically. A lower nut 16 is threadedly connected to the upper outer side of the U-shaped hanging ring 1. The upper end of the U-shaped hanging ring 1, positioned above the lower nut 16, passes through the corresponding through hole and is located on the upper side of the fixing plate 3. An upper nut 17 is threadedly connected to the outer side of the U-shaped hanging ring 1, which is located on the upper side of the fixing plate 3. The U-shaped hanging ring 1 is used to connect the ground wire.

[0061] like Figure 3 , 5As shown in -7 and 9-10, a second pin 18 distributed in the left and right direction is provided inside the limiting groove 6 of the base 4 corresponding to the position of the torsion spring 9, and the torsion spring 9 is fitted on the outside of the second pin 18. Thus, the torsion spring 9 is connected to the second pin 18, so that the torsion spring 9 can rotate around the second pin 18, providing a clamping force to the pressure tongue 8 in the direction of the drop-out fuse.

[0062] like Figure 3 , 5 As shown in -7 and 9-10, a third pin 19 is provided on the inner side of the limiting groove 6 of the base 4 corresponding to the bottom position of the pressure tongue 8, and the pressure tongue 8 is fitted on the outer side of the third pin 19. Thus, the pressure tongue 8 is connected by the third pin 19, allowing the pressure tongue 8 to rotate around the third pin 19; the hanging rod 10 is cylindrical, and the hanging rod 10 at the upper end of the pressure tongue 8 is used to hang the entire device into the U-shaped groove of the drop-out fuse.

[0063] like Figure 1-3 As shown in Figures 5-6 and 8-11, the insulating rod includes an insulating rod head and an epoxy resin tube 20. The insulating rod head includes an integrally formed upper cylinder 21 and a lower cylinder 22 with a diameter smaller at the top and larger at the bottom. The bottom of the lower cylinder 22 is provided with a cylindrical mounting groove with an opening facing downwards. The epoxy resin tube 20 is fixedly installed on the inner side of the cylindrical mounting groove. Two locking posts 23 are symmetrically arranged radially on the outer side of the upper cylinder 21. The top of the upper cylinder 21 is provided with two blind holes with openings facing upwards at intervals along the radial direction. A ball catcher shell 29 is fixedly installed in each blind hole. The ball catcher shell 29 has a spring mounting cavity 30 inside. The spring mounting cavity 30 is provided with a spring 31 and a ball catcher 24. The top of the spring mounting cavity 30 has an outlet 32. The ball catcher 24 is close to the outlet 32, and the diameter of the outlet 32 ​​is smaller than the diameter of the ball catcher 24. The ball catcher 24 is pressed tightly against the outlet 32 ​​by the spring 31.

[0064] The bottom of the fixing base 5 is provided with a circular groove 25 that opens downward and matches the outer diameter of the upper cylinder 21. The bottom inner side of the circular groove 25 is provided with two hemispherical grooves 33 that open downward and correspond to the ball 24. When the insulating rod is connected to the fixing base 5, the ball 24 is located inside the corresponding hemispherical groove 33. The lower outer side of the fixing base 5 is provided with an "L"-shaped groove 26 that communicates with the circular groove 25 and corresponds to the locking post 23. When the insulating rod is connected to the fixing base 5, the locking post 23 is located inside the corresponding groove 26 by rotating the insulating rod. An angle α is formed between the straight line where the two balls 24 are located and the straight line where the two hemispherical grooves 33 are located. The angle α is 25°.

[0065] The insulating rod head and the epoxy resin tube 20 are riveted together as a whole, that is, the upper cylinder 21 and the fixed seat 5 are riveted together.

[0066] In use, by inserting the upper cylinder 21 of the insulating rod head into the circular groove 25 at the bottom of the fixing base 5, and aligning the locking pin 23 with the "L"-shaped locking groove 26, the insulating rod is pushed in forcefully. The ball 24 is pressed by the inner end face of the upper cylinder 21 along the direction of the spring 31, so that the spring 31 is in a compressed state. Then, by rotating about 25° in the opposite direction along the "L"-shaped locking groove 26, the locking pin 23 enters the inner side of the "L"-shaped locking groove 26, and the ball 24 is just locked into the hemispherical groove 33 of the fixing base 5, so as to achieve a firm connection and transmit torque.

[0067] In summary, this invention, by setting a rotatable support mechanism, changes the initial state of the pressure tongue 8 in different working positions (such as pressing against the pressure tongue 8 or hanging naturally), thereby achieving adaptive connection of different types of drop-out fuses (new type drop-out fuse 27 and old type drop-out fuse 28). This significantly reduces the procurement and management costs of tools. In addition, during the connection process, the support mechanism can automatically reset under its own weight, simplifying the operation. Furthermore, this invention provides continuous clamping force by setting a torsion spring 9, and combined with the pressure tongue 8 structure, ensures that the device is in close contact with the fuse U-shaped groove after connection, with low grounding resistance, high safety performance, and reliable electrical connection.

[0068] Furthermore, by setting up a rotation locking mechanism including a locking post 23 and a locking groove 26, and an axial positioning mechanism of a ball bearing 24 and a hemispherical groove, the present invention achieves rapid connection / separation, a firm connection, and convenient disassembly, which greatly improves the efficiency and safety of high-altitude operations and realizes a connection between the insulating rod and the main body that is both firm and easy to assemble and disassemble quickly.

[0069] Therefore, the present invention, through the arrangement of the main body, the pressure tongue 8, the torsion spring 9, the support mechanism and other structures, can solve the problems of versatility, reliability and convenience of the complete grounding connection device structure. In the present invention, the torsion spring 9, the pressure tongue 8 and the support mechanism are all connected by pin hinges, which makes the structure compact, the mechanical action reliable and the service life long.

[0070] Example 2: This embodiment of the invention discloses a method for using a drop-out fuse grounding connection device. The method uses a drop-out fuse grounding connection device and includes the following steps:

[0071] Step S101: When performing the splicing operation, first connect the insulating rod to the fixed base 5;

[0072] Step S102: Manually move the support mechanism to abut against the pressure tongue 8, press the pressure tongue 8 and the torsion spring 9, so that the hanging rod 10 of the pressure tongue 8 opens, so that the hanging rod 10 is away from the position of the positioning plate 2.

[0073] Step S103: Lift the insulating rod and align the hanging rod 10 with the U-shaped hanging groove of the fuse that needs to be grounded. The U-shaped hanging groove pushes the pressure tongue 8, causing the support mechanism to separate from the pressure tongue 8. The support mechanism automatically resets under the action of gravity. Under the action of the torsion spring 9, the pressure tongue 8 presses down on the fuse, forming a reliable electrical contact.

[0074] Step S104: After the connection is secure, remove the insulating rod from the lower end of the fixing base 5 to complete the connection.

[0075] Step S105: After the hanging operation is completed, reconnect the insulating rod to the fixed base 5, lift the insulating rod upwards with force to remove the hanging rod 10 from the U-shaped hanging groove, and remove the entire device.

[0076] The manual actuation of the support mechanism, which abuts against the pressure tongue 8, includes:

[0077] Under natural conditions, the support mechanism is in a state where the long convex column 12 is vertically downward under the action of gravity;

[0078] When performing the splicing operation, manually move the long protruding post 12 to rotate it 90° so that it abuts against the back of the pressure tongue 8.

[0079] The connection between the insulating rod and the fixed base 5 includes:

[0080] Insert the upper cylinder 21 into the circular groove 25 of the fixing base 5, align the locking pin 23 on the outside of the upper cylinder 21 with the locking groove 26 on the fixing base 5, forcefully push the upper cylinder 21 into the circular groove 25 of the fixing base 5 through the epoxy resin tube 20, and rotate it 25° so that the locking pin 23 is locked inside the L-shaped locking groove 26. At this time, the ball 24 is located in the hemispherical groove, completing the connection between the insulating rod and the fixing base 5.

Claims

1. A grounding connection device for a drop-out fuse, characterized in that, Includes the main body, elastic clamping device, insulating rod, and U-shaped hanging ring; The main body includes a positioning plate, a fixing plate, a base, and a fixing seat. The front side of the positioning plate has a through mounting groove. The bottom rear side of the positioning plate is fixed with a fixing plate that is perpendicular to the positioning plate. A U-shaped hanging ring is movably connected to the fixing plate. The base is fixedly connected to the front side of the positioning plate. The inner side of the base has a limiting groove that opens upward and communicates with the mounting groove. The front bottom side of the base has an opening that communicates with the inner side of the limiting groove. The fixing plate and the bottom of the base are fixedly connected with a fixing seat. An insulating rod is movably connected to the bottom of the fixing seat. The elastic clamping device includes a support mechanism, a pressure tongue, a torsion spring, and hanging rods. An arc-shaped pressure tongue is hinged to the inner side of the limiting groove, with the arc-shaped opening facing the front of the limiting groove. A torsion spring locking groove with a forward-opening opening is provided on the front side of the pressure tongue. A torsion spring is hinged to the inner side of the limiting groove facing the arc-shaped opening of the pressure tongue. The fixed end of the torsion spring is fixedly connected to the front side of the inner side of the limiting groove, and the moving end of the torsion spring is locked in the torsion spring locking groove. The upper end of the pressure tongue extends to the top of the base, and hanging rods are fixedly connected to both sides of the pressure tongue located above the base. A support mechanism that can abut against the rear side of the pressure tongue after rotation is hinged to the inner side of the mounting groove. The insulating rod includes an insulating rod head and an epoxy resin tube. The insulating rod head includes an integrally formed upper cylinder and a lower cylinder with a diameter that is smaller at the top and larger at the bottom. The bottom of the lower cylinder has a cylindrical mounting groove with an opening facing downwards. An epoxy resin tube is fixedly installed inside the cylindrical mounting groove. Two locking pins are symmetrically arranged radially on the outer side of the upper cylinder. Two blind holes with openings facing upwards are arranged radially at intervals on the top of the upper cylinder. A ball bearing shell is fixedly installed in each blind hole. The ball bearing shell has a spring mounting cavity. The spring mounting cavity contains a spring and a ball bearing. The top of the spring mounting cavity has an outlet. The ball bearing is close to the outlet, and the diameter of the outlet is smaller than the diameter of the ball bearing. The ball bearing is pressed tightly against the outlet by the spring. The bottom of the fixing base has a downward-opening circular groove that matches the outer diameter of the upper cylinder. The bottom of the inner side of the circular groove has two downward-opening hemispherical grooves that correspond to the contact beads. When the insulating rod is connected to the fixing base, the contact beads are located inside the corresponding hemispherical grooves. The lower outer side of the fixing base has an "L"-shaped slot that communicates with the circular groove and corresponds to the locking post. When the insulating rod is connected to the fixing base, the locking post is located inside the corresponding slot by rotating the insulating rod. The straight line where the two contact beads are located forms an angle with the straight line where the two hemispherical grooves are located, and the angle is 25°.

2. The grounding connection device for a drop-out fuse according to claim 1, characterized in that, The support mechanism includes a long protruding column and a short protruding column that are perpendicular to each other and integrally formed. The connection between the long protruding column and the short protruding column is provided with a long strip hole that runs through the left and right sides. The positioning plate on the left and right sides of the upper part of the mounting groove is provided with an ear plate that protrudes from the positioning plate. The two ear plates are fixedly connected to a first pin that is rotatably connected to the inside of the long strip hole. After the long protruding column rotates 90° outside the first pin, it can abut against the back of the pressure tongue.

3. The grounding connection device for a drop-out fuse according to claim 1, characterized in that, The upper outer side of the U-shaped hanging ring is threaded, and the fixing plate corresponding to the position of the U-shaped hanging ring is provided with a through hole. The upper outer side of the U-shaped hanging ring is threaded with a lower nut. The upper end of the U-shaped hanging ring above the lower nut passes through the through hole at the corresponding position and is located on the upper side of the fixing plate. The outer side of the U-shaped hanging ring corresponding to the upper side of the fixing plate is threaded with an upper nut.

4. A grounding connection device for a drop-out fuse according to claim 1, characterized in that, The base limiting groove corresponding to the position of the torsion spring is provided with a second pin distributed in the left and right direction, and the torsion spring is fitted on the outside of the second pin.

5. A grounding connection device for a drop-out fuse according to claim 1, characterized in that, A third pin is provided on the inner side of the base limiting groove corresponding to the bottom position of the pressure tongue, and the pressure tongue is fitted on the outer side of the third pin.

6. A grounding connection device for a drop-out fuse according to claim 1, characterized in that, The hanging rod is cylindrical.

7. A method of using a drop-out fuse grounding connection device, wherein the method uses a drop-out fuse grounding connection device as described in any one of claims 1 to 6, characterized in that, Includes the following steps: When performing the splicing operation, first connect the insulating rod to the fixed base; Manually move the support mechanism to press it against the pressure tongue, squeezing the pressure tongue and torsion spring, causing the hanging rod of the pressure tongue to open, thus moving the hanging rod away from the position of the positioning plate; Lift the insulating rod and align it with the U-shaped groove of the fuse that needs to be grounded. The U-shaped groove pushes the pressure tongue, causing the support mechanism to separate from the pressure tongue. The support mechanism automatically resets under the action of gravity, and the pressure tongue presses down on the fuse under the action of the torsion spring, forming a reliable electrical contact. After the connection is secure, remove the insulating rod from the bottom of the mounting base to complete the connection. After the hanging operation is completed, reconnect the insulating rod to the fixed base, lift the insulating rod upwards with force to remove the hanging rod from the U-shaped hanging groove, and remove the entire device.

8. The method of using the grounding connection device for a drop-out fuse according to claim 7, characterized in that, The manually operated support mechanism, which abuts against the pressure tongue, includes: Under natural conditions, the support mechanism is in a state of vertical downward movement of the long convex column under the action of gravity. When performing the splicing operation, manually move the long protruding post to rotate it 90° so that it abuts against the back of the pressure tongue.

9. The method of using the grounding connection device for a drop-out fuse according to claim 7, characterized in that, The connection between the insulating rod and the fixed base includes: Insert the upper cylinder into the circular groove of the fixing base, align the outer pin of the upper cylinder with the groove on the fixing base, and forcefully push the upper cylinder into the circular groove of the fixing base through the epoxy resin tube. Rotate it 25° so that the pin is locked inside the L-shaped groove. At this time, the ball is located in the hemispherical groove, completing the connection between the insulating rod and the fixing base.

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