Drop-out fuse mounting plate live-line mounting device

Abstract

The invention discloses a live-line installation device for a drop-out fuse installation plate, relates to the technical field of electrical equipment installation, and aims to solve the problems that replacement of the drop-out fuse installation plate needs large-range power failure and the universality is poor. The live-line installation device comprises a U-shaped fixing plate and an installation piece connected with the U-shaped fixing plate; the U-shaped fixing plate is connected with an installation cross arm of the drop-out fuse, the opening direction of the U-shaped fixing plate is matched with the cross section shape of the installation cross arm, a lock catch structure is installed on the installation piece and fixes the installation piece on the cross arm, the U-shaped fixing plate is connected with an insulation installation base, and the insulation installation base is connected with a power source. An original mounting plate can be replaced after the original mounting plate of the drop-out fuse porcelain insulator is separated from the porcelain insulator, rapid and accurate mounting in an electrified state is achieved, faults caused after the drop-out fuse porcelain insulator is separated from the mounting plate are prevented, and power supply reliability and operation efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment installation, and in particular to a live installation device for a drop-out fuse mounting plate. Background Art

[0002] Overhead distribution lines currently account for a significant portion of my country's power distribution network, primarily responsible for transmitting power to vast areas, including suburban and rural areas. Drop-out fuses are a commonly used short-circuit protection device in distribution networks, widely used for protecting branch lines and switching equipment on and off during power outages. A drop-out fuse typically consists of a porcelain tube, a mounting plate located in the center of the tube, brackets at each end, a fuse tube, and a fuse mounted within the tube. The fuse tube is mounted between the brackets at each end of the tube. The mounting plate and tube are connected during production by pouring special cement or similar filler material into the holes of the insulating ceramic body, followed by the insertion of a mounting handle. In actual operation, due to age, environmental corrosion, or manufacturing defects, these drop-out fuses can cause the cast between the fuse tube and the mounting plate to separate, causing the fuse body to detach from the mounting plate. This can lead to single-phase grounding or even phase-to-phase short circuits, resulting in power line tripping, circuit breaker damage, and power outages for consumers. Currently, there are no effective means or measures to prevent these failures. Once the fuse tube detaches from the mounting plate, the entire distribution network must be shut down to replace the drop-out fuse, which can cause widespread and prolonged outages and severely impact consumer electricity quality.

[0003] Furthermore, conventional installation methods have certain limitations when adapting to different specifications of drop-out fuses and installing crossarms, making it difficult to quickly and accurately complete installation operations. For example, Chinese patent publication number CN105788989B relates to a drop-out fuse replacement device comprising a top plate, wherein the front and rear sides of the left end of the top plate are symmetrically connected to a pair of linkage mechanisms via a rotating shaft. The linkage mechanisms each comprise a rotating rod, a connecting plate, a hanging ring, and a telescopic plug rod. The connecting plate is provided with a hanging ring for connecting to a hook, and each connecting plate is connected to a drop-out fuse. A fixed pulley and a plug rod are sequentially provided on the right side of the rotating shaft. A cable passing through the fixed pulley is provided with a hook at one end, which is connected to a hanging ring of a connecting plate through the hook, and the other end is connected to the side wall of a winding post. The plug rod is provided with a limiting socket for inserting the winding post. The outer wall of the rotating shaft of the fixed pulley is provided with multiple sockets. The connecting plate is provided with a telescopic plug rod, and the top of the telescopic plug rod is provided with a plug that can be inserted and fixed in the socket. This device allows for adjustable mounting angles and securely securely fixed dropout fuses. It also provides a backup device, facilitating replacement and installation in the event of damage to existing equipment, improving maintenance efficiency. However, the Chinese patent application with publication number CN105788989B requires a power outage to replace the dropout fuse, impacting surrounding users and preventing the direct replacement of aging mounting plates. Therefore, there is an urgent need for a live installation device for dropout fuse mounting plates that can be installed while powered on, offers excellent versatility, and is easy to install. Summary of the Invention

[0004] In order to solve the problems that replacement of the drop-type fuse mounting plate requires large-scale power outages and has poor versatility, the present invention proposes a live installation device for the drop-type fuse mounting plate. After the original mounting plate of the drop-type fuse porcelain bottle is separated from the porcelain bottle, it can replace the original mounting plate, thereby achieving fast and accurate installation under power, preventing the drop-type fuse porcelain bottle from detaching from the mounting plate and causing malfunctions, and improving power supply reliability and operating efficiency.

[0005] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a live installation device for a drop-type fuse mounting plate, comprising a U-shaped fixing plate and a mounting piece connected to the U-shaped fixing plate, wherein the U-shaped fixing plate is connected to the mounting crossarm of the drop-type fuse, the opening direction of the U-shaped fixing plate is adapted to the cross-sectional shape of the mounting crossarm, a locking structure is installed on the mounting piece, and the locking structure fixes the mounting piece on the crossarm, and the U-shaped fixing plate is connected to an insulating mounting base.

[0006] In this technical solution, an insulating structure is used to fix the mounting base on the original fuse mounting cross arm, and then a hook-shaped automatic retraction structure is used to automatically fix the fuse porcelain bottle on the insulating base, thereby achieving the purpose of replacing the original mounting plate of the drop-type fuse and preventing the drop-type fuse body from losing its fixation and falling off, causing single-phase grounding or phase-to-phase faults.

[0007] Preferably, a guide slot is provided at the front end of the U-shaped fixing plate, and the guide slot forms a guide snap-in structure that snaps into the side of the mounting crossarm during installation, thereby achieving rapid positioning and snap connection between the U-shaped fixing plate and the mounting crossarm.

[0008] Preferably, upper and lower corresponding fixing pin holes are provided on the two side plate surfaces of the U-shaped fixing plate, and the fixing pin holes are located at a position where the U-shaped fixing plate exceeds the width of the cross arm. After the U-shaped fixing plate clamps the cross arm, a fixing pin is inserted into the fixing pin hole to achieve a fixed connection between the U-shaped fixing plate and the cross arm.

[0009] Preferably, one end of the U-shaped fixing plate is connected to an extension portion connected to the insulating mounting base, and the insulating mounting base includes a retractable mounting plate, one end of the mounting plate is connected to the bottom end of the U-shaped fixing plate through at least two sets of springs, and the other end is installed with a hook-shaped automatic retraction structure. The mounting plate can be retracted and retracted inside the extension portion to accommodate drop-out fuses from different manufacturers.

[0010] Preferably, the extension portion is provided with a mounting plate presetter, and the mounting plate is adjusted to the longest state before installation. After installation is completed, the presetter is removed, so that the mounting plate is automatically adjusted to an adaptive length under the action of a spring. A positioning pin is provided between the extension portion and the mounting plate. After the mounting plate presetter is removed, the positioning pin can be inserted into the mounting plate to fix its expanded and contracted size to prevent the porcelain bottle from moving.

[0011] Preferably, the hook-shaped automatic contraction structure is a semicircular hook provided at one end of the mounting plate, the semicircular hook supports the porcelain bottle of the drop-type fuse and fixes the porcelain bottle through elastic contraction force.

[0012] Preferably, the locking structure includes bolts, nuts or clamps, which fasten the U-shaped fixing plate and the mounting cross arm to ensure the stability of the device during live operation.

[0013] Preferably, the U-shaped fixing plate is provided with an arc-shaped opening extending outward.

[0014] Preferably, reinforcing ribs are provided on the outer side of the hook-shaped automatic contraction structure.

[0015] The beneficial effects of the present invention are: 1) it can be installed in a live state, avoiding the inconvenience caused by power outages, improving power supply reliability, and reducing the impact on users; 2) the design of the retractable mounting plate and the hook-shaped automatic retraction structure enables the bracket to adapt to drop-type fuses of different manufacturers and different specifications, solving the problem of poor versatility of traditional installation methods; 3) the provision of structures such as guide slots and mounting plate presetters makes the installation process faster and more accurate, reduces the difficulty of the operation, and improves the operation efficiency; 4) through the cooperation of the locking structure, fixing pin holes and positioning pins, the connection between the bracket and the mounting crossarm and the porcelain bottle is ensured to be firm, thereby ensuring the safety of live operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the live installation device for the drop-out fuse mounting plate of the present invention.

[0017] Figure 2 for Figure 1 Section view at AA.

[0018] Figure 3 It is a left side view of the live installation device of the drop-out fuse mounting plate of the present invention.

[0019] Figure 4 for Figure 3 In the cross-section of BB.

[0020] Figure 5 This is a schematic diagram of the mounting plate and positioning pin structure of the live mounting device for the drop-out fuse mounting plate of the present invention.

[0021] Reference numerals: U-shaped fixing plate 1; fixing pin hole 1-1; extension portion 1-2; mounting member 2; insulating mounting base 3; mounting plate 3-1; hook-shaped automatic retracting structure 3-2; guide slot 4; fixing pin 5; positioning pin 6. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] During the operation of the power system, drop-out fuses are important equipment to ensure the safe and stable operation of distribution networks of 10kV and below. However, due to the long-term influence of environmental factors, such as vibration, corrosion or temperature changes, the connection structure between the mounting plate and the porcelain bottle is prone to aging or loosening, causing the mounting plate to fall off, which may in turn cause single-phase grounding or inter-phase faults, seriously affecting the reliability of power supply. The traditional method of replacing the mounting plate often requires a power outage, which not only brings inconvenience to the user, but also causes certain economic losses. Therefore, it is of great practical significance to develop a device that can quickly and safely replace the mounting plate in a live state.

[0024] Example 1 This embodiment provides a live installation device for a drop-out fuse mounting plate, which is mainly composed of three parts: a U-shaped fixing plate 1, a mounting member 2, and an insulating mounting base 3. Figures 1 to 4 ,The following is a detailed structure and function introduction of each part.

[0025] The main function of the U-shaped fixing plate is to connect the mounting crossarm of the drop-out fuse. In this embodiment, the U-shaped fixing plate can be connected to the mounting crossarm, fully adapt to the cross-sectional shape of the mounting crossarm, and fit closely to the common angle steel crossarm, providing a stable support foundation for the entire device.

[0026] A guide slot 4 is provided at the front end of the U-shaped fixing plate. This design is the key to achieving fast and accurate installation.

[0027] During the installation process, the guide slot can be accurately clipped onto the side of the installation crossbar, guiding the U-shaped fixing plate to accurately align with the installation crossbar like a track.

[0028] This guiding effect greatly improves the installation efficiency and reduces the difficulty and time cost of operators when working at height.

[0029] Upper and lower corresponding fixing pin holes 1 - 1 are provided on both side surfaces of the U-shaped fixing plate, and the fixing pin holes are located at positions where the U-shaped fixing plate exceeds the width of the cross arm.

[0030] After the U-shaped fixing plate is clamped on the mounting crossarm, the connection between the U-shaped fixing plate and the mounting crossarm can be further strengthened by inserting the fixing pin 5 through the fixing pin hole.

[0031] This connection method can withstand greater tension and vibration, ensuring the firmness of the connection during long-term operation.

[0032] In some other embodiments, the fixing pin may be a high-strength bolt or a specially made latch.

[0033] The U-shaped fixing plate features an outward-extending curved opening. This design offers multiple advantages. Firstly, it helps better accommodate the crossarm during installation. Even if the crossarm has dimensional deviations or uneven surfaces, the curved opening provides a buffer, ensuring smooth installation of the U-shaped fixing plate. Secondly, the curved opening provides more room for operators to work, facilitating installation operations and increasing installation flexibility.

[0034] The mounting piece is connected to the U-shaped fixing plate, and its main function is to fix the entire device on the mounting crossarm through a locking structure.

[0035] The locking structure can be in the form of bolts, nuts or clamps.

[0036] When using bolts and nuts, it is necessary to select appropriate specifications and strength grades to ensure that they can withstand the weight of the device and fuse as well as external forces.

[0037] During the installation process, the operator can tightly connect the U-shaped fixing plate and the installation cross arm by tightening the bolts and nuts.

[0038] The clamp is easy to install and has strong adaptability, and can quickly fix the device on the crossarm.

[0039] The locking structure's tightening effect can offset the stress caused by tension, gravity, and vibration during installation, preventing the bracket from loosening or falling off when energized, ensuring operational safety.

[0040] One end of the U-shaped fixing plate is connected to an extension portion connected to the insulating mounting base, and the insulating mounting base includes a retractable mounting plate.

[0041] One end of the mounting plate is connected to the bottom end of the U-shaped fixing plate through at least two sets of springs, and the other end is equipped with a hook-shaped automatic contraction structure, and the mounting plate can be extended and retracted inside the extension part.

[0042] This retractable design is designed to adapt to the length of the porcelain bottle of drop-out fuses of different manufacturers and specifications.

[0043] Fuses produced by different manufacturers may have certain differences in size. Through the expansion and contraction of the spring, the mounting plate can automatically adjust its length to ensure a perfect fit with the porcelain bottle, thereby improving the versatility of the device.

[0044] The outer side of the hook-shaped automatic contraction structure is provided with reinforcing ribs to improve the support capacity of the porcelain bottle.

[0045] The extension part is provided with a mounting plate presetter, and before installation, the operator can adjust the mounting plate to the longest state through the mounting plate presetter.

[0046] The purpose of this is to cover all possible fuse sizes and to ensure that the length of the mounting plate does not need to be frequently adjusted during installation.

[0047] After the installation is completed, the mounting plate presetter is removed and the mounting plate automatically shrinks under the action of the spring to fit the actual length of the porcelain bottle, realizing the automation and precision of the installation.

[0048] A positioning pin 6 is provided between the extension portion 1 - 2 and the mounting plate 3 - 1 . After the mounting plate is adjusted to a suitable length, the positioning pin is inserted to fix its position.

[0049] The function of the positioning pin is to prevent the mounting plate from sliding due to vibration or external force during operation, ensuring that the porcelain bottle always remains in a stable fixed state.

[0050] The initial configuration of the mounting plate and dowel pins is as follows Figure 5 As shown, the mounting plate and the positioning pin are provided with matching protruding tooth structures. After the length of the mounting plate is adjusted, the mounting plate can be fixed by the positioning pin.

[0051] The material and size of the positioning pins need to be selected according to the specific requirements of the device to ensure that they have sufficient strength and stability.

[0052] The hook-shaped automatic contraction structure 3-2 is a semicircular hook arranged at one end of the mounting plate. The semicircular hook is made of elastic material and has good elastic contraction force.

[0053] During installation, no additional tools are required. Just put the porcelain bottle of the drop-out fuse into the semicircular hook, and the hook will automatically contract to clamp the porcelain bottle.

[0054] This design is not only simple and convenient to operate, but also ensures that the porcelain bottle will not loosen or fall off during operation, thereby improving the safety and reliability of the device.

[0055] The following is a detailed operating procedure for using this device to perform live installation of a drop-out fuse mounting plate.

[0056] Before installing, first conduct a comprehensive inspection of all components of the mounting bracket.

[0057] Check whether the guide slot is smooth and undamaged to ensure that it can be smoothly connected to the side of the installation crossarm; check whether the fixing pin hole is unobstructed and has no blockage or deformation to ensure that the fixing pin can be smoothly inserted; check whether the functions of the mounting plate presetter and positioning pin are normal to ensure that the position of the mounting plate can be accurately adjusted and fixed.

[0058] At the same time, the mounting plate is adjusted to its longest position using the mounting plate presetter to accommodate porcelain bottles of different lengths during the installation process. In addition, the operator needs to wear insulating protective equipment and prepare the necessary tools and materials.

[0059] Next, the U-shaped fixing plate is connected to the installation cross arm, including preliminary positioning, precise installation and fixed connection.

[0060] Align the opening of the U-shaped fixing plate with the mounting crossarm, so that the guide slot is engaged with the side of the mounting crossarm. The operator should carefully observe the fit of the guide slot and the crossarm to ensure that they fit tightly without any gaps or shaking.

[0061] Use the guide slots to accurately push the U-shaped fixing plate to the installation position. During the pushing process, be sure to keep the U-shaped fixing plate horizontal and vertical to avoid tilting or offsetting.

[0062] Insert the fixing pins into the fixing pin holes on both sides of the U-shaped fixing plate to further secure the connection between the U-shaped fixing plate and the mounting crossarm. When inserting the fixing pins, ensure that the fixing pins are fully inserted and tighten them with a tool to ensure a secure connection.

[0063] At the same time, a locking structure is used to fasten the U-shaped fixing plate and the installation cross arm together.

[0064] When using bolts and nuts, tighten them according to the specified torque to avoid loosening or damage of the connection due to insufficient or excessive tightening force.

[0065] Finally, the insulating mounting base and the porcelain bottle are installed, including porcelain bottle fixing, mounting plate adjustment and final fixing.

[0066] Place the dropout fuse's porcelain bottle into the semicircular hook at one end of the mounting plate. Ensure the bottle is centered within the hook to avoid any deviation or tilt. The semicircular hook automatically clamps the bottle through elastic contraction, providing initial securement.

[0067] After installation is complete, remove the mounting plate presetter and the mounting plate will automatically shrink under the action of the spring to fit the actual length of the porcelain bottle. The operator should observe the shrinkage of the mounting plate to ensure that it can accurately fit the porcelain bottle without gaps or looseness.

[0068] Insert the locating pins to fix the position of the mounting plate to prevent it from sliding during operation. When inserting the locating pins, make sure that the locating pins are inserted into place and tighten them with tools to ensure the stability of the mounting plate.

[0069] The live installation device for the drop-type fuse mounting plate provided in this embodiment has significant technical effects and broad application prospects.

[0070] First, the device can be installed under power, avoiding the inconvenience and economic losses caused by power outages, improving power supply reliability, and ensuring normal power supply to users.

[0071] Second, it is highly versatile. The design of the retractable mounting plate and hook-shaped automatic retraction structure enables the device to adapt to drop-out fuses of different manufacturers and specifications, solving the problem of poor versatility of traditional installation methods and reducing equipment procurement and maintenance costs.

[0072] Third, installation is easy. The guide slots, mounting plate presetter, and other features make installation faster and more accurate, reducing operational difficulty and improving efficiency. Operators can complete installation tasks without complex operating skills or numerous tools.

[0073] Fourth, it's safe and reliable. The locking mechanism, fixed pin holes, and positioning pins ensure a secure connection between the device, the mounting crossarm, and the porcelain bottle, ensuring safety during live operations. Furthermore, the insulated mounting base effectively prevents electric shock accidents, enhancing device safety.

[0074] This device is suitable for replacing drop-out fuse mounting plates in various power systems, especially in urban and rural areas where power supply reliability is a high priority. With the continuous development and upgrading of power systems, the requirements for equipment installation and maintenance are becoming increasingly stringent. The emergence of this device will provide the power industry with an efficient, safe, and reliable installation solution, with excellent market value.

[0075] Example 2 This embodiment provides a live installation device for a drop-out fuse mounting plate, which also includes a U-shaped fixing plate, a mounting member, and an insulating mounting base, and provides some improvements compared to Example 1.

[0076] The U-shaped fixing plate is used to connect the mounting crossarm of the drop-out fuse, and the opening direction thereof is adapted to the cross-sectional shape of the mounting crossarm to ensure that it can fit tightly with the crossarm.

[0077] Different from Example 1, in this embodiment, a reinforcing rib structure is added to the U-shaped fixing plate to improve the supporting capacity of the U-shaped fixing plate; an elastic gasket is connected to the inner side of the U-shaped fixing plate, which can enhance the friction between the U-shaped fixing plate and the installation crossbeam to prevent the device from loosening during operation.

[0078] The mounting piece is connected to the U-shaped fixing plate, and a locking structure is installed on the mounting piece, which fixes the mounting piece to the cross arm through the locking structure to ensure the stability of the entire bracket.

[0079] The U-shaped fixing plate is also connected to an insulating mounting base for supporting a porcelain bottle of a drop-out fuse.

[0080] A guide slot is provided at the front end of the U-shaped fixing plate, and the guide slot forms a guide snap-in structure for snapping into the side of the installation cross arm during installation.

[0081] During the installation process, the guide slot can guide the U-shaped fixing plate to accurately align with the installation crossarm, achieving rapid positioning and improving installation efficiency.

[0082] Upper and lower corresponding fixing pin holes are provided on the two side surfaces of the U-shaped fixing plate, and the fixing pin holes are located at the position where the U-shaped fixing plate exceeds the width of the cross arm.

[0083] After the U-shaped fixing plate is clamped on the mounting crossarm, the fixing pin can be inserted through the fixing pin hole to further strengthen the connection between the U-shaped fixing plate and the mounting crossarm to ensure the firmness of the connection.

[0084] One end of the U-shaped fixing plate is connected to an extension portion connected to the insulating mounting base, and the insulating mounting base includes a retractable mounting plate.

[0085] One end of the mounting plate is connected to the bottom end of the U-shaped fixing plate through at least two sets of springs, and the other end is equipped with a hook-shaped automatic contraction structure, so that the mounting plate can be extended and retracted inside the extension part.

[0086] This retractable design enables the mounting plate to adapt to the length of the porcelain bottles of drop-out fuses of different manufacturers and specifications, thereby improving the versatility of the bracket.

[0087] The extension part is provided with a mounting plate presetter, which can be used to adjust the mounting plate to the longest state before installation to cover all possible fuse sizes.

[0088] After the installation is completed, remove the mounting plate presetter, and the mounting plate will automatically shrink under the action of the spring to fit the actual length of the porcelain bottle.

[0089] A positioning pin is provided between the extension part and the mounting plate. After the mounting plate is adjusted to an appropriate length, the positioning pin is inserted to fix its position to prevent the mounting plate from sliding due to vibration or external force during operation, thereby ensuring that the porcelain bottle is securely fixed.

[0090] The hook-shaped automatic contraction structure is a semicircular hook provided at one end of the mounting plate. The semicircular hook is used to support the porcelain bottle of the drop-type fuse and fix the porcelain bottle through elastic contraction force.

[0091] Different from Example 1, in this embodiment, the inner wall of the semicircular hook is designed to have a serrated anti-slip structure, or the hook is made of a material with a higher elastic modulus to enhance its clamping force.

[0092] During installation, no additional tools are required. Just put the porcelain bottle into the semicircular hook and the hook will automatically contract to clamp the porcelain bottle. The operation is simple and convenient.

[0093] The locking structure shown can be a bolt, nut or clamp, which is used to fasten the U-shaped fixing plate and the installation cross arm.

[0094] By tightening with bolts or clamping with clamps, the U-shaped fixing plate and the crossarm can be tightly connected together to offset the stress caused by tension, gravity and vibration during installation, prevent the bracket from loosening or falling off when energized, and ensure safe operation.

[0095] The U-shaped fixing plate is provided with an arc-shaped opening extending outward, which helps to better accommodate the installation cross arm during the installation process, and also facilitates the operator to perform installation operations and improves the flexibility of installation.

[0096] The operation process is described in detail below.

[0097] Before installation, first check that all components of the mounting bracket are intact and that the guide slots, fixing pin holes, mounting plate presetters, and positioning pins are functioning properly. Adjust the mounting plate to its longest position using the mounting plate presetter to accommodate porcelain bottles of varying lengths during installation.

[0098] Then, connect the U-shaped fixing plate and the installation crossarm.

[0099] Align the opening of the U-shaped fixing plate with the mounting crossarm, allowing the guide slots to engage the sides of the mounting crossarm. Using the guide slots, accurately push the U-shaped fixing plate into the installation position. Next, insert the retaining pins into the retaining pin holes on either side of the U-shaped fixing plate to further secure the connection between the U-shaped fixing plate and the mounting crossarm. Furthermore, use the locking mechanism to securely connect the U-shaped fixing plate to the mounting crossarm, ensuring a secure connection.

[0100] Finally, install the insulating mounting base and the porcelain bottle.

[0101] Place the dropout fuse's porcelain bottle into the semicircular hook at one end of the mounting plate. The hook automatically clamps the bottle securely through elastic contraction. Once installed, remove the mounting plate's pre-setter. The spring forces the mounting plate to automatically contract to fit the actual length of the bottle. Finally, insert the locating pin to secure the mounting plate in place and prevent it from slipping during operation.

[0102] Traditional replacement methods require a power outage, resulting in power outages for users. However, this new solution, through the integration of a U-shaped fixing plate and an insulated mounting base, allows for direct replacement of failed mounting plates while the power is on, without interrupting line operation. This feature significantly reduces the scope and duration of power outages, making it particularly suitable for urban core areas and critical load areas. It avoids the economic losses and user experience degradation caused by power outages, and fundamentally improves the continuity and reliability of power supply in the distribution network.

[0103] The present invention uses a retractable mounting plate connected by a spring, which can adapt to the length of the porcelain bottle of fuses of different manufacturers and different specifications without the need for customized adjustment. It is compatible with different types of drop-type fuses and does not require a separate bracket designed for specific equipment, significantly reducing the cost of spare parts management and construction complexity. The semicircular hook at the end automatically clamps the porcelain bottle through elastic contraction force, and can be fixed without additional tools, solving the problem of loosening or falling off caused by size mismatch of traditional mounting plates, ensuring the stability and convenience of mechanical connection. The guide slot at the front end of the U-shaped fixing plate can be accurately clipped to the side of the installation crossarm to achieve rapid positioning; with bolts, clamps or a new type of quick locking structure, the fastening connection with the crossarm can be completed without complicated measurements, greatly shortening the installation time during high-altitude operations and reducing the labor intensity and safety risks of operators.

[0104] The insulated mounting base is made of high-strength insulating material to effectively isolate the porcelain bottle from the crossarm, preventing the conductive components from being grounded due to the mounting plate falling off. At the same time, the fixed pin hole, positioning pin and reinforced lock structure form multiple mechanical locks to resist external loads such as wind and vibration, prevent the device from loosening or the porcelain bottle from falling, and ensure operational safety from both mechanical and electrical levels.

[0105] To address hidden dangers such as aging of the mounting plate and failure of the casting layer, the present invention can quickly replace failed components without power outages, eliminating faults in the budding stage, avoiding phase-to-phase short circuits or single-phase grounding accidents caused by the falling of porcelain bottles, and reducing the risk of line tripping and equipment damage.

[0106] In summary, the live installation bracket for the drop-type fuse mounting plate provided by the present invention addresses the problems of grounding or short-circuit failures caused by aging and falling off of the mounting plate of traditional fuses, as well as low efficiency and poor adaptability of replacement during power outages. Through mechanical structure innovation and functional design, it achieves efficient, safe and reliable installation in live operation scenarios.

Claims

1. A live installation device for a drop-out fuse mounting plate, characterized in that: It includes a U-shaped fixing plate and a mounting piece connected to the U-shaped fixing plate. The U-shaped fixing plate is connected to the mounting cross arm of the drop-out fuse. The opening direction of the U-shaped fixing plate is adapted to the cross-sectional shape of the mounting cross arm. A locking structure is installed on the mounting piece, and the locking structure fixes the mounting piece on the cross arm. The U-shaped fixing plate is connected to an insulating mounting base.

2. A live installation device for a drop-out fuse mounting plate according to claim 1, characterized in that: A guide slot is provided at the front end of the U-shaped fixing plate, and the guide slot forms a guide snap-in structure that snaps into the side edge of the installation cross arm during installation.

3. The live installation device for a drop-out fuse mounting plate according to claim 1, characterized in that: Upper and lower corresponding fixing pin holes are provided on both side surfaces of the U-shaped fixing plate, and the fixing pin holes are located at positions where the U-shaped fixing plate exceeds the width of the cross arm.

4. The live installation device for a drop-out fuse mounting plate according to claim 1, characterized in that: One end of the U-shaped fixing plate is connected to an extension portion connected to an insulating mounting base. The insulating mounting base includes a retractable mounting plate. One end of the mounting plate is connected to the bottom end of the U-shaped fixing plate through at least two sets of springs, and the other end is installed with a hook-shaped automatic retraction structure. The mounting plate can be retracted and retracted inside the extension portion.

5. The live installation device for a drop-out fuse mounting plate according to claim 4, characterized in that: The extension portion is provided with a mounting plate presetter, and a positioning pin is provided between the extension portion and the mounting plate.

6. The live installation device for a drop-out fuse mounting plate according to claim 4, characterized in that: The hook-shaped automatic contraction structure is a semicircular hook provided at one end of the mounting plate. The semicircular hook supports the porcelain bottle of the drop-type fuse and fixes the porcelain bottle through elastic contraction force.

7. The live installation device for a drop-out fuse mounting plate according to claim 1, characterized in that: The locking structure includes bolts, nuts or clamps, which are used to fasten the U-shaped fixing plate and the mounting cross arm.

8. A live installation device for a drop-out fuse mounting plate according to any one of claims 1 to 7, characterized in that: The U-shaped fixing plate is provided with an arc-shaped opening extending outward.

9. The live installation device for a drop-out fuse mounting plate according to claim 4, characterized in that: Reinforcing ribs are provided on the outer side of the hook-shaped automatic contraction structure.

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