Fuse porcelain bottle fastening hook capable of being installed in electrified mode

Abstract

The utility model discloses a fuse porcelain insulator fastening hook capable of being installed in an electrified manner, and belongs to the technical field of high-voltage operation equipment. In order to solve the problem that in the prior art, a fuse porcelain insulator and a mounting plate are easy to separate and need to be powered off for maintenance, an integrated insulation mechanical solution is provided. According to the device, a two-way clamping structure is formed by combining an obtuse-angle bent connecting rod through the spatial vertical layout of a semicircular hook-shaped fixator and a clamping groove type fixator; trapezoidal anti-skid convex strips and grid reinforcing ribs are arranged on the inner wall of a semicircular hook body and wrap the surface of a porcelain bottle in a self-adaptive manner within an elastic deformation range; self-locking type clamping connection of the channel steel installation plate is achieved through the anti-disengaging chamfers of the U-shaped groove side plates and the gradually-changing thickness design. By utilizing the integral molding characteristic of an insulating material, during operation, upper and lower clamping can be synchronously completed through single push and pull of an insulating rod, so that the porcelain insulator and the mounting plate form rigid connection, and safe reinforcement is realized in an electrified state through a hook-groove bidirectional mechanical transmission path and an elastic deformation compensation mechanism.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage operating equipment technology, and in particular to a fuse insulator fastening hook that can be installed while energized. Background Technology

[0002] Overhead power distribution lines, as the core carrier of power transmission in my country's urban and rural power grids, are directly related to the reliability of power supply due to their safe operation. Drop-out fuses, as key equipment for short-circuit protection of branch lines, have long faced the risk of detachment caused by the aging and separation of the porcelain insulator-mounting plate casting. Traditional maintenance methods require manual climbing of towers after the entire line is de-energized, which has inherent drawbacks such as large power outage areas and long repair times.

[0003] To address the challenge of live-line replacement, Chinese utility model patent CN210607690U proposes an electrically driven grounding clamp that uses a built-in electric cylinder to drive the clamp's engagement, replacing the insulated operating rod. However, this technology has significant limitations: 1) It relies on a battery power system, posing a risk of circuit failure in low-temperature and humid environments; 2) The electric cylinder-push rod transmission mechanism increases the overall weight, creating a risk of slippage and fall during high-altitude operations; 3) The remote control mode using the insulated rope cannot achieve the precise angle adjustments required for fuse installation. Furthermore, the detachable connection between its U-shaped section and the base is prone to gaps under mechanical vibration, affecting the stability of force transmission. Utility Model Content

[0004] This invention addresses the technical challenge of the easy separation of porcelain insulators from the mounting plate casting of drop-out fuses under long-term environmental corrosion, manufacturing defects, or strong winds. It provides a preventative reinforcement device. Through an integrated, insulated mechanical structure, it performs live reinforcement before the porcelain insulator and mounting plate are completely detached: the lower semi-circular hook-shaped retainer elastically deforms and self-clamps the outer wall of the porcelain insulator, while the upper U-shaped groove engages with the channel steel mounting plate. During this process, the hook undergoes a reaction force, resulting in gradual deformation and tightening, creating a dynamic reinforcement effect of "locking upon engagement." This device eliminates complex transmission mechanisms, achieving power-free reinforcement through a purely mechanical structure. Utilizing the self-locking mechanism formed by the hook-groove bidirectional clamping, it rigidly connects the porcelain insulator to the crossarm base, effectively suppressing the widening of gaps caused by vibration and corrosion, fundamentally preventing the separation of the porcelain insulator from the mounting plate. Its insulating material and purely mechanical structure design ensure safe and reliable live-line operation.

[0005] This utility model proposes a fuse insulator fastening hook that can be installed while energized. The fastening hook includes: a longitudinally extending connecting rod, the lower part of which is connected to a semi-circular hook-shaped fixing device, and the upper part of which is connected to a slot-type fixing device; the outer wall surface of the semi-circular hook-shaped fixing device is stamped to form a grid-like reinforcing rib; the upper end of the connecting rod is bent to form an installation tilt angle α, and the tilted part is provided with a triangular installation hole; the slot-type fixing device is provided with a U-shaped groove.

[0006] Preferably, the tip of the semi-circular hook-shaped retainer has an arc-shaped cut.

[0007] Preferably, the inner wall of the semi-circular hook-shaped retainer has anti-slip ridges extending axially.

[0008] Preferably, the anti-slip ridges attached to the semi-circular hook-shaped fastener have a width ranging from 0.25 cm to 0.35 cm.

[0009] Preferably, the installation angle α of the connecting rod is in the range of 155° to 175°.

[0010] Preferably, the triangular mounting hole matches the insulated operating rod.

[0011] Preferably, the U-shaped groove is composed of side plates symmetrically distributed on both sides, namely an upper side plate and a lower side plate.

[0012] Preferably, the upper and lower side plates form a snap-fit ​​gap that matches the thickness of the channel steel mounting base plate, ranging from 0.55 cm to 0.65 cm.

[0013] Preferably, the upper side plate and the top of the side plate form an outwardly flared chamfer, which extends outwardly from the edge of the groove.

[0014] Preferably, the fastening hook is integrally molded from insulating material.

[0015] This invention achieves high efficiency and safety in live-line installation operations through the coordinated design of a semi-circular hook-shaped fixator, a connecting rod, and a slot-type fixator. The anti-slip ridges and mesh-like reinforcing ribs of the semi-circular hook-shaped fixator form a composite load-bearing structure. The transverse friction texture on the surface of the anti-slip ridges microscopically engages with the surface of the porcelain insulator, significantly improving clamping friction and preventing slippage caused by wind loads or vibrations during high-altitude operations. The mesh-like reinforcing ribs, through an orthogonal cross-layout, evenly distribute external loads, effectively suppressing hook deformation and extending tool life. The obtuse-angle bend design of the connecting rod precisely matches the fuse installation angle, and its axial spatial layout efficiently converts operating torque into clamping and locking forces. The tilted drop structure simultaneously counteracts the tool deflection tendency caused by eccentric loads, improving operational stability. The U-shaped groove of the slot-type fastener features an integrated design of gradually thickened side plates and anti-detachment chamfers. The restoring force generated by the elastic deformation of the side plates is converted into radial clamping force through the obtuse-angled bending section. The guide bevel of the anti-detachment chamfer contacts the edge of the mounting plate to generate a self-locking component force, achieving rapid positioning and reliable locking of the mounting plate. The connecting rod is integrally molded from insulating material, and the internal reinforcing skeleton and external shielding layer form an equipotential protection system to suppress induced current leakage during live work. The surface anti-slip texture matches the ergonomic bending angle to reduce operator fatigue. The overall structure achieves a balance between lightweight and high strength through rigid connections and gradient stiffness distribution, making it suitable for rapid adaptation to different specifications of porcelain insulators and channel steel mounting plates, significantly reducing installation and adjustment time for high-altitude live work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the device of this utility model.

[0017] Figure 2 This is a structural schematic diagram of the device from a second perspective.

[0018] Figure 3 This is a structural schematic diagram of the device from a third-view perspective.

[0019] In the diagram: 1-Semi-circular hook-shaped fastener, 11-Grid-shaped reinforcing rib, 12-Anti-slip convex strip, 2-Connecting rod, 21-Mounting hole, 3-Slot-type fastener, 31-U-shaped groove, 311-Upper side plate, 312-Lower side plate. Detailed Implementation

[0020] Example 1

[0021] according to Figure 1 , Figure 2 , Figure 3 As shown, the device of this utility model is integrally molded with insulating material and includes three main structures: a semi-circular hook-shaped fixer 1, an intermediate connecting rod 2, and a slot-type fixer 3. The components form a stable system with complementary spatial mechanics.

[0022] The inner wall of the semi-circular hook-shaped retainer 1 is provided with axially extending trapezoidal anti-slip ridges 12, which form a multi-directional interlocking contact with the outer surface of the porcelain bottle. The outer wall surface is distributed with a grid-like reinforcing rib structure 11, which significantly improves the local resistance to deformation. The opening direction of the hook-shaped structure is spatially perpendicular to the opening of the U-shaped groove 31 of the slot-type retainer 3, forming a bidirectional force transmission channel through the connecting rod 2, which simultaneously generates a bidirectional clamping force on the porcelain bottle and the mounting plate during installation.

[0023] The intermediate connecting rod 2 features a specific angled bend design, with its axis forming an obtuse angle with the bottom plane of the slotted retainer 3 to meet standard installation requirements. A triangular mounting hole 21 is provided on the upper section of the rod, containing a positioning structure compatible with the insulated operating rod to ensure efficient transmission of operating torque. Both ends of the connecting rod 2 seamlessly connect to the hook-shaped retainer and the slotted retainer 3, respectively, with the mating surfaces completely covering the contact area, achieving uniform distribution of mechanical load.

[0024] The U-shaped groove 31 of the slot-type retainer 3 is composed of symmetrical upper and lower side plates. The top of the side plates is machined with an outwardly expanding anti-loosening chamfer, forming a gradually narrowing guide inlet. A snap-fit ​​gap adapted to the thickness of the mounting plate is formed between the two side plates, providing self-adjustment capability within the elastic deformation range. When the chamfered bevel contacts the edge of the mounting plate, it generates a guiding effect, which, together with the vertical layout of the hook-shaped retainer, forms a spatial self-locking effect, effectively preventing loosening caused by operational vibration.

[0025] The semi-circular hook-shaped fastener 1 has an arc-shaped structure with an outer diameter of 15 cm and an axial length of 15 cm, and a wall thickness of 0.4 cm. Its arc-shaped inner wall extends along the axial centerline with continuous anti-slip ridges 12, 0.3 cm wide, forming a three-point contact engagement with the outer surface of the ceramic bottle. The intermediate connecting rod 2 is 5 cm long and is injection-molded from glass fiber reinforced epoxy resin. The upper end of the rod axis forms an installation tilt angle of 155°-175°. The slot-type fastener 3 has a U-shaped structure with a length of 8 cm and a width of 2.5 cm. The side plates are 0.4 cm thick and spaced 0.6 cm apart.

[0026] During installation, when the operator pushes the device with the insulating rod, the guide chamfer of the U-shaped groove 31 automatically corrects the installation position, simultaneously causing the hook-shaped retainer to tightly wrap around the surface of the porcelain insulator. The anti-slip ridge 12 and the mesh reinforcing ribs work together to generate a ring-shaped clamping force, and the tilt design of the connecting rod 2 optimizes the distribution of the device's center of gravity, significantly improving the stability of high-altitude operations. The device as a whole adopts a streamlined transition design, and the key connection parts eliminate stress concentration through arc surfaces. The surface texture direction matches the direction of the applied force, balancing insulation performance and ease of operation.

[0027] This structure achieves rapid and precise installation in energized environments through geometric constraints and mechanical complementarity between components. The vertical arrangement of the hook-shaped retainer and the slot-type retainer 3 forms a bidirectional constraint, which, combined with the obtuse-angle force transmission characteristic of the connecting rod 2, ensures a dynamic balance of clamping force between the porcelain insulator and the mounting plate. While maintaining a lightweight structure, the device meets high-voltage insulation requirements and long-term fatigue resistance, making it particularly suitable for power equipment maintenance under complex operating conditions.

[0028] The entire device is integrally molded using engineering-grade insulating materials, forming a dual protection mechanism in a live environment: the outer insulating shell provides the primary insulation barrier, while the embedded reinforcing skeleton forms an equipotential shielding layer. The mechanical transmission path of the upper and lower structures has been specially optimized. The locking force of the U-shaped groove 31 is precisely converted into the circumferential clamping force of the hook-shaped retainer through the tilt angle of the connecting rod 2. At the same time, the elastic memory characteristics of the insulating material ensure that the deformable components automatically return to their initial shape after unloading. This design allows operators to simultaneously complete the channel steel clamping and porcelain insulator clamping with a single push-pull action without interrupting power, and the electric field strength at each contact point is always controlled within a safe threshold during installation.

[0029] A specially designed deformation compensation system plays a crucial role during operation: when the side plate of the U-shaped channel 31 undergoes axial deformation, the hook-shaped retainer below absorbs excess displacement through the nodal deformation of the mesh reinforcing ribs. The annular reinforcing ribs on its outer wall and the reinforced skeleton of the connecting rod 2 form a continuous force transmission channel, effectively distributing the installation stress throughout the entire device. This upper and lower linkage elastic deformation mechanism ensures the synchronous fastening of the mounting plate and the porcelain insulator while avoiding equipment damage caused by local overstress, truly achieving a balance between safety and reliability in live-line work.

[0030] Example 2

[0031] The semi-circular hook-shaped retainer 1 has a continuous anti-slip ridge 12 extending axially along its arc-shaped inner wall. Its top surface is machined with dense transverse friction textures, forming an interlocking contact with the surface of the fusible insulator. The inner walls of the hook on both sides of the anti-slip ridge 12 smoothly transition, forming symmetrically distributed clamping surfaces with curvature matching the outer contour of the insulator. The outer wall of the hook is covered with orthogonally intersecting grid-like reinforcing ribs 11. The main ribs extend along the arc length of the hook, while the secondary ribs penetrate the main ribs vertically to form a closed ring structure. The structural strength is enhanced at the grid intersections through local thickening. The top arc-shaped opening adopts an asymmetrical tapering design, with the opening edge forming a continuously transitioning mechanical transmission interface with the bent portion of the connecting rod 2.

[0032] The semi-circular hook-shaped retainer 1 has a tapering arc at its opening end, with the inner radius of the arc being larger than the outer radius, forming a guide entrance structure to facilitate the sliding of the porcelain bottle. The root of the hook body is rigidly connected to the connecting rod 2, and the connecting surface covers the circumferential area of ​​the outer wall of the hook body root. The connecting seam is continuously distributed along the contact edge between the hook body and the connecting rod 2. The grid-like reinforcing ribs 11 on the outer wall of the hook body extend to the edge of the connecting area, forming a mechanical transmission path with the reinforcing structure on the surface of the connecting rod 2.

[0033] The anti-slip ridge 12 extends continuously from the open end to the closed end of the hook body, and its width remains uniform along the axial direction of the hook body. A stress-buffering slope is provided at the transition area between the root of the ridge and the hook body to avoid stress concentration. The density of the reinforcing ribs on the outer wall of the closed end of the hook body is higher than that at the open end, forming a gradient load-bearing capacity distribution. The inner curved surface of the closed end forms a non-perpendicular angle with the axis of the connecting rod 2 to ensure that the direction of the clamping force is consistent with the direction of the operating force.

[0034] When the tool grips the porcelain bottle, the lateral friction texture of the anti-slip ridges 12 creates a microscopic engagement with the surface of the porcelain bottle. The grid-like reinforcing ribs 11 disperse the external load through an orthogonal cross structure, preventing the hook from deforming. The tapered arc-shaped opening at the hook guides the porcelain bottle along a preset path into the gripping area. The grid nodes of the outer wall reinforcing ribs undergo local deformation under load, adaptively adjusting the gripping pressure distribution.

[0035] Example 3

[0036] The connecting rod 2 is made of high-strength insulating material and molded in one piece using an injection molding process. The overall structure features an obtuse-angle bend corresponding to the fuse's installation angle. The bending angle is precisely controlled by the mold cavity to ensure that the clamping surfaces of the two end retainers remain synchronously fitted with the mounting components during operation. The mounting hole 21, which runs through the upper section of the rod, has a triangular structure to match the insulating operating rod.

[0037] The rod body is internally fitted with a reinforcing skeleton, oriented along the rod's axis, and formed an anti-torsional mesh structure through interlacing weaves in the obtuse-angle bend areas. The surface of connecting rod 2 is covered with an insulating rubber layer, and the outer layer is molded with diamond-shaped anti-slip patterns. The pattern direction is consistent with the direction of force applied during operation, and the pattern depth is controlled through a mold etching process to balance friction and wear resistance. The lower wall thickness at the obtuse-angle bend of the rod body is thickened, while the outer wall maintains a smooth, streamlined transition. The bend apex area undergoes localized densification treatment to enhance bending stiffness.

[0038] The upper end of connecting rod 2 is hot-pressed and bent to form an installation tilt angle of 155°-175°. The bending angle is determined according to the installation tilt angle of the drop-out fuse. The mounting hole 21 is provided with an annular reinforcing flange around its perimeter. The outer diameter of the flange is smoothly connected to the anti-slip texture on the surface of the rod to avoid abrupt structural changes.

[0039] During operation, the insulating operating rod quickly aligns with the mounting hole 21 via a triangular positioning structure. Its unique obtuse-angle bend design adapts to the installation requirements of various fuse models. This bend structure is angle-adapted according to the spatial layout characteristics of different types of fuses, ensuring that the clamping force direction maintains the optimal mechanical transmission relationship with the fuse mounting reference plane. The rod body adopts a multi-layer composite structure design, with the reinforced frame and external insulation layer forming a dual protection system, achieving efficient transmission of operating torque while balancing the electric field distribution.

[0040] The anti-slip texture system and the obtuse-angle bending structure work together to transform the combined load during operation into axial clamping force, and also compensate for installation deviations of different fuse models through angle self-adaptation. The obtuse angle feature of the bending structure creatively balances versatility and directional locking requirements, automatically adjusting the stress distribution pattern when matching various fuses, ensuring clamping stability while avoiding excessive stress on the porcelain insulator. This design achieves automatic installation direction correction through an angle matching mechanism, ensuring that the operating torque is always transmitted along a preset path, effectively suppressing the risk of displacement under vibration.

[0041] Example 4

[0042] The U-shaped groove 31 of the slot-type retainer 3 is composed of symmetrically distributed side plates, which form a rigid U-shaped structure through a bottom connecting plate. The top of the side plates is machined with an outward-expanding anti-detachment chamfer. The chamfered surface extends outward from the edge of the groove to form a guide chamfer. The angle of the chamfer matches the insertion direction of the mounting plate, ensuring an inward force is generated when the mounting plate is pushed in. The upper and lower side plates of the U-shaped groove 31 adopt a gradually thinning design, gradually thinning from the root to the top to form an elastic deformation buffer zone. The transition area between the inner edge of the side plate and the bottom connecting plate has a stress-dispersing arc, the curvature of which matches the curvature of the connecting rod 2 bend, achieving smooth load transfer.

[0043] The beveled surface of the anti-detachment chamfer extends to the outer surface of the side plate, flush with the outer wall of the obtuse angle bending area of ​​the connecting rod 2, forming a continuous force-bearing interface. The slot-type retainer 3 is rigidly connected to the connecting rod 2 through the obtuse angle bending section. The outer wall thickness of the bending section increases to form a bending-resistant reinforcing rib. The bending angle causes the opening plane of the U-shaped groove 31 to form a spatially misaligned layout with the clamping surface of the semi-circular hook-shaped retainer 1. When the mounting plate is pushed in, the restoring force generated by the elastic expansion of the side plate is converted into the radial clamping force of the semi-circular hook through the bending section.

[0044] The upper and lower side plates of the U-shaped groove 31 are manufactured using an integrated stamping process. The free ends of the side plates are tapered in their natural state, with the inner spacing slightly less than the thickness of the mounting plate. During the insertion of the mounting plate, the side plates are compressed and elastically expand outwards. After the mounting plate fully enters the interlocking gap, the side plates spring back to form an interference fit. The beveled surface of the anti-disengagement chamfer contacts the edge of the mounting plate, generating a horizontal force that forces the side plates to remain locked. The wavy anti-slip texture on the inner surface of the side plates engages with the microstructure of the mounting plate surface, forming a two-way locking mechanism in conjunction with the clamping action of the semi-circular hook-shaped retainer 1.

[0045] During live-line work, this device achieves safe and reliable installation through a coordinated upper and lower working mechanism. When the operator manipulates the insulating rod to push the U-shaped groove 31 into the channel steel mounting plate, the lower semi-circular hook-shaped fixing device 1 simultaneously undergoes adaptive deformation. Its grid-like reinforcing ribs 11 system provides controllable radial expansion within the elastic deformation range, ensuring flexible contact with the porcelain insulator surface. The trapezoidal anti-slip ridges 12 on the inner wall of the hook-shaped fixing device undergo micron-level deformation at the moment of contact, establishing multi-point engagement with the porcelain insulator surface through transverse friction textures. The grid-like reinforcing rib system then evenly distributes the local contact pressure across the entire hook body arc surface.

[0046] During the engagement of the U-shaped groove 31 with the channel steel, the semi-circular hook-shaped retainer 1 continuously increases the clamping pressure through the rebound force generated by elastic deformation. The orthogonally distributed grid reinforcement ribs on its outer wall form a two-way constraint mechanism: the longitudinal main ribs inhibit axial tensile deformation, and the annular secondary ribs control the radial deformation amplitude, forming a composite structure that combines elastic adaptation and rigid support. This deformation reinforcement system enables the hook body to compensate for dimensional deviations through elastic displacement while maintaining a stable clamping contact force when subjected to porcelain bottle assembly tolerances.

Claims

1. A fuse insulator fastening hook that can be installed while energized, characterized in that, The fastening hook includes: A longitudinally extending connecting rod (2) is connected to a semi-circular hook-shaped fixing device (1) at its lower part and to a slot-shaped fixing device (3) at its upper part; the outer wall surface of the semi-circular hook-shaped fixing device (1) is stamped to form a grid-shaped reinforcing rib (11); The upper end of the connecting rod (2) is bent to form an installation angle α, and a triangular installation hole (21) is provided through the inclined part; The slotted retainer (3) is provided with a U-shaped groove (31).

2. The fuse insulator fastening hook that can be installed energized, as described in claim 1, is characterized in that... The top of the semi-circular hook-shaped retainer (1) forms an arc-shaped cut.

3. A fuse insulator fastening hook that can be installed energized, as described in claim 1, is characterized in that... The inner wall of the semi-circular hook-shaped fastener (1) has an axially extending anti-slip ridge (12).

4. A fuse insulator fastening hook that can be installed energized, as described in claim 1 or 3, characterized in that, The width of the anti-slip ridge (12) attached to the semi-circular hook-shaped fastener (1) ranges from 0.25 cm to 0.35 cm.

5. A fuse insulator fastening hook that can be installed energized, as described in claim 1, is characterized in that... The installation angle α of the connecting rod (2) ranges from 155° to 175°.

6. A fuse insulator fastening hook that can be installed energized, as described in claim 1, is characterized in that... The triangular mounting hole (21) matches the insulating operating rod.

7. A fuse insulator fastening hook that can be installed energized, as described in claim 1, is characterized in that... The U-shaped groove (31) is composed of two symmetrically distributed side plates, namely the upper side plate (311) and the lower side plate (312).

8. A fuse insulator fastening hook that can be installed energized, as described in claim 7, is characterized in that... The upper side plate (311) and the lower side plate (312) form a snap-fit ​​gap that is adapted to the thickness of the channel steel mounting base plate, ranging from 0.55 cm to 0.65 cm.

9. A fuse insulator fastening hook that can be installed energized, as described in claim 7 or 8, characterized in that, The top of the upper side plate (311) and the side plate (312) form an outwardly expanding anti-detachment chamfer, which extends outwardly from the edge of the groove.

10. A fuse insulator fastening hook that can be installed energized, as described in claim 1, characterized in that, The fastening hook is integrally molded from insulating material.

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