Electrified disconnection auxiliary device

Abstract

According to the live-line disconnection auxiliary device, the transparent insulating sleeve, the end cover and other insulating structures are arranged, so that a live-line part is effectively isolated, and reliable safety protection is provided for operators. During live-line switch lead disconnection and connection operation, even if an accident occurs, an operator can be prevented from being injured by an electric arc to the greatest extent, so that the personal safety of the operator is practically guaranteed, and the requirements of electric power safety working regulations are met; the potential safety hazard that an operator is forced to operate violently due to the fact that the pole-mounted voltage transformer cannot exit the operation state is effectively solved. Meanwhile, the device needs to be suitable for a new installation scene of the pole-mounted voltage transformer, has the advantages of being easy and convenient to install and low in cost, and can effectively reduce the installation difficulty, save the installation cost and improve the operation and maintenance efficiency and reliability of an electric power system.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for disconnecting switch leads, and more specifically to an auxiliary device for disconnecting live wires. Background Technology

[0002] In the field of distribution automation, pole-mounted voltage transformers are indispensable key equipment for pole-mounted intelligent switches to realize distribution automation functions. In actual operation and maintenance of power systems, when performing live-line or load-bearing installation, replacement, or removal of pole-mounted intelligent switches and disconnection / reconnection of switch leads, situations often arise where pole-mounted voltage transformers need to be connected or disconnected under energized conditions. According to Section 11.3.3 of the "State Grid Corporation of China Power Safety Work Regulations, Part 8: Distribution Section," before disconnecting or connecting unloaded lines under energized conditions, it must be confirmed that all downstream switches and disconnectors are open, and transformers and voltage transformers are out of service. This regulation aims to ensure the safety of personnel and equipment during live-line work and avoid safety accidents caused by violations of regulations. However, in actual field operation environments, two problems urgently need to be addressed.

[0003] First, some pole-mounted voltage transformers in operation are directly connected to the leads on the switching power supply side, and there is no disconnect switch between them and the line T-junction to isolate the power supply. This design flaw means that when performing live-line work to disconnect the switch leads, the pole-mounted voltage transformer cannot be taken out of operation, forcing live-line workers into a predicament of being forced to perform illegal operations, seriously threatening their personal safety. Second, during the installation of new switches, to prevent the pole-mounted voltage transformer from becoming energized simultaneously when connecting the switch leads, the current measure is to add two drop-out fuses between the voltage transformer and the pole-mounted switch. Although this method meets safety regulations, it brings many drawbacks. On the one hand, the installation difficulty is significantly increased, requiring more time and effort from professional personnel; on the other hand, the cost is greatly increased, not only increasing the purchase cost of the equipment, but also potentially leading to higher maintenance costs due to the complexity of installation. In addition, adding equipment means more points of failure, reducing the reliability of the entire power system.

[0004] Currently, Chinese patents "201410291184.1" and "202023199798.7" disclose a portable single-phase air bypass switch, which can achieve the corresponding disconnection function to a certain extent. However, it has obvious shortcomings. The overall structure is relatively heavy, making it extremely inconvenient to install in environments with limited space and relatively weak load-bearing capacity, such as pole-mounted voltage transformers. Furthermore, its complex structure further increases the difficulty and cost of installation, making it difficult to meet the requirements of convenience and economy in actual operation. Based on the above situation, the development of an auxiliary device specifically for live disconnection of pole-mounted voltage transformer leads is particularly urgent. Summary of the Invention

[0005] The purpose of this invention is to provide a live disconnection auxiliary device, which is suitable for the new installation of pole-mounted voltage transformers and can realize the corresponding disconnection auxiliary function, thus solving the problems in the prior art.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a live disconnection auxiliary device, comprising a transparent insulating sleeve, with end caps installed at both ends along the length of the transparent insulating sleeve, and a fixed seat provided inside the transparent insulating sleeve between the two end caps. A first conductive block and a second conductive block are detachably installed on the fixed seat, and a fuse connects the first conductive block and the second conductive block. A first conductive post is provided at the end of the first conductive block away from the fuse, and a current transformer screw plate is installed at the end of the first conductive post extending out of the end cap. A second conductive post is provided at the end of the second conductive block away from the fuse. A contact block capable of electrically connecting with the second conductive post is fitted inside the fixed seat. A first spring is provided between the contact block and the fixed seat, and the first spring always tends to push the contact block into contact with the second conductive post. A pull rod is also provided on the contact block. A first insulating ring is provided at one end of the end cap. A wire threaded plate electrically connected to the contact block is installed on the end cap near the first insulating ring. A spring pin is installed in the fixing seat at the bottom of the contact block. A positioning groove that mates with the spring pin is opened at the bottom of the contact block. The spring pin includes a pin shaft with a raised edge on its outer circumference located in the fixing seat. A vertical groove that mates with the raised edge is opened in the fixing seat. A plug is provided at the opening of the vertical groove. A second spring is fitted around the pin shaft between the plug and the raised edge. The second spring always tends to push the pin shaft into the positioning groove. A second insulating ring is provided at the end of the pin shaft extending out of the transparent insulating sleeve. When the first insulating ring is pulled away from the second conductive post by the elastic force of the first spring, the second spring can push the pin shaft into the positioning groove, maintaining the contact block separated from the second conductive post and de-energized. A detachable first clamping bolt is installed in the first conductive block, and a detachable second clamping bolt is installed in the second conductive block. A fuse is installed between the studs of the first and second clamping bolts. A gear plate for electrical connection is installed on the end cap near the contact block. A first gear plate is installed on the gear plate. A wire fixing plate is provided on the wire threaded plate. A second gear plate that meshes with the first gear plate is provided on the wire fixing plate. A fastening bolt is threaded at the center of the second gear plate. A through hole that mates with the fastening bolt is opened at the center of the first gear plate. A handle and a limiting post are provided at the end of the fastening bolt that protrudes from the first gear plate. The diameter of the limiting post is larger than the diameter of the fastening bolt. Rotating the handle can make the second gear plate mesh and press against the first gear plate.The positioning groove has an inwardly protruding positioning block on the side near the end cover. The positioning block has a first inclined surface. The end of the pin has an annular groove that cooperates with the positioning block. After the annular groove separates from the positioning block, the pin can move out of the positioning groove. The fixed base is equipped with an unlocking pin that can move vertically into the positioning groove. The end of the unlocking pin has a second inclined surface that cooperates with the first inclined surface. After the unlocking pin moves up to the second inclined surface and separates from the first inclined surface, the contact block remains in the state where the annular groove and the positioning block are disengaged. The pin has a horizontally arranged reset rod installed on it. The unlocking pin has a guide groove that cooperates with the reset rod. When the pin moves down from the positioning groove, it can simultaneously drive the unlocking pin to move out of the positioning groove. The positioning groove has an inwardly protruding positioning block on its side near the end cap. A slot that mates with the positioning block is provided on one side of the pin. A square post extends from the outer periphery of the transparent insulating sleeve from the pin, and a square sleeve is fitted onto the square post. The square post can move vertically along the square sleeve, and the square post and square sleeve can rotate synchronously. A connecting block is provided on the transparent insulating sleeve, and a third spring is connected to both ends of the connecting block along its length and to the square sleeve. The two third springs always tend to engage the slot on the pin with the positioning block. Horizontal rotation of the second insulating ring overcomes the elastic force of the third springs, causing the slot on the pin to separate from the positioning block. After the slot separates from the positioning block, the pin can move downwards out of the positioning groove. The top of the pin has a hemispherical head, and a concave surface that mates with the hemispherical head is formed on the top surface of the positioning groove.

[0007] The positive effects of this invention are as follows: The live-line disconnection auxiliary device described herein can effectively avoid forced violations caused by the pole-mounted voltage transformer being in operation or simultaneously commissioned during live-line work, thus effectively ensuring the personal safety of personnel performing live-line work. Furthermore, this device must be applicable to new installations of pole-mounted voltage transformers, featuring simple installation and low cost, effectively reducing installation difficulty, saving installation costs, and improving the operation and maintenance efficiency and reliability of the power system.

[0008] By installing transparent insulating sleeves, end caps, and other insulating structures, live parts are effectively isolated, providing reliable safety protection for workers. During live-line disconnection and connection of switch leads, even in the event of an accident, arc injuries to workers can be minimized, effectively ensuring their personal safety and complying with electrical safety work regulations. This effectively solves the safety hazard of workers being forced to violate regulations due to the inability of pole-mounted voltage transformers to be deactivated.

[0009] The overall device has a reasonable structural design, and the installation and disassembly of each component are convenient. With the setting of the current transformer screw plate and the wire screw plate, the overall device can be stably installed and operated by bolts. There is no need for complicated installation procedures and professional tools, which reduces the installation difficulty, reduces the installation time, and improves the work efficiency. It is especially suitable for pole-mounted operation environments with limited space and complex working conditions.

[0010] Compared to the traditional method of adding two drop-out fuses between the voltage transformer and the pole-mounted switch, the device of this invention has a simple structure and fewer parts, significantly reducing equipment purchase costs. Simultaneously, due to its ease of installation, it reduces manpower input during installation and rework costs caused by potential installation errors. Subsequent maintenance is also easier, reducing maintenance costs and improving the overall economic efficiency of the power system. During live-line working, it can reliably and stably perform the disconnection auxiliary function, ensuring the normal operation of the power system, reducing power outages and safety hazards caused by equipment failures, and improving the reliability and stability of the power system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial cross-sectional schematic diagram of the present invention; Figure 3 yes Figure 2 An enlarged view of the sectional view along the AA direction; Figure 4 yes Figure 2 A magnified view of part of I; Figure 5 yes Figure 4 A schematic diagram showing the state in which the middle structural contact block is separated from the second conductive post; Figure 6 This is an installation diagram of the present invention; Figure 7 This is a schematic diagram of a structure in which a fuse is installed between the first conductive block and the second conductive block. Figure 8 This is a schematic diagram of an adjustable wire screw plate installed on the end cap; Figure 9 yes Figure 8 Exploded view of the middle structure; Figure 10 This is a schematic diagram of a structure in which an unlocking pin is installed inside a fixed seat on one side of the pin shaft; Figure 11 yes Figure 10 Side view of the middle structure; Figure 12 yes Figure 10 A schematic diagram showing the contact state between the middle structural pin pull-down contact block and the second conductive post; Figure 13 This is another structural embodiment of the pin; Figure 14 yes Figure 13 An enlarged view of the BB-axis sectional view; Figure 15 yes Figure 13 An enlarged view of the sectional view along the CC direction; Figure 16 yes Figure 13 A schematic diagram showing the state of contact between the structural pin pull-down contact block and the second conductive post. Detailed Implementation

[0012] The present invention provides an auxiliary device for live disconnection, such as... Figure 1-4 As shown, it includes a transparent insulating sleeve 1, with end caps 2 installed at both ends of the transparent insulating sleeve 1 along its length, and a fixing seat 3 provided inside the transparent insulating sleeve 1 between the two end caps 2.

[0013] The mounting base 3 is detachably equipped with a first conductive block 4 and a second conductive block 5. A fuse 6 is connected between the first conductive block 4 and the second conductive block 5. The fuse 6 can be replaced according to different types of voltage transformers and wires.

[0014] The first conductive block 4 is provided with a first conductive post 7 at the end away from the fuse 6. The end of the first conductive post 7 that extends out of the end cover 2 is equipped with a transformer screw plate 8. The transformer screw plate 8 can be fixedly installed on the voltage transformer by bolts, so as to achieve stable installation and electrical connection at the same time.

[0015] The second conductive block 5 has a second conductive post 9 at the end away from the fuse 6. A contact block 10 that can be electrically connected to the second conductive post 9 is installed in the fixing base 3. The contact block 10 can move in the fixing base 3. When the contact block 10 contacts the second conductive post 9, a conductive electrical connection path is formed. When the contact block 10 moves away from the second conductive post 9, the electrical connection is broken.

[0016] A first spring 11 is provided between the contact block 10 and the fixed base 3. The first spring 11 always tends to push the contact block 10 into contact with the second conductive post 9, thus establishing a conductive electrical connection path. A pull rod 12 is also provided on the contact block 10. One end of the pull rod 12 that extends out of the end cover 2 is provided with a first insulating ring 13. Pulling the first insulating ring 13 away from the end cover 2 can overcome the elastic force of the first spring 11 and separate the contact block 10 from the second conductive post 9, thereby breaking the electrical connection.

[0017] A wire threaded plate 14 electrically connected to the contact block 10 is installed on the end cover 2 near the first insulating ring 13. The wire threaded plate 14 can be fixed on the wire with bolts. The device is securely installed between the voltage transformer and the wire through the threaded plates at both ends. The line can be disconnected by pulling the first insulating ring 13. The overall structure is simple and easy to install on the transformer. The disconnection operation is also easy to implement.

[0018] To maintain the circuit disconnected state, a spring pin is installed in the fixing seat 3 at the bottom of the contact block 10. A positioning groove 15 that cooperates with the spring pin is opened at the bottom of the contact block 10. When the contact block 10 moves away from the second conductive post 9, the spring pin can enter the positioning groove 15 to limit the movement of the contact block 10, thereby overcoming the elastic force of the first spring 11 and keeping the contact block 10 in the disconnected state separated from the second conductive post 9.

[0019] The spring pin includes a pin shaft 16. The pin shaft 16, located within the fixed base 3, has a raised edge 17 on its outer periphery. A vertical groove 18, which mates with the raised edge 17, is provided within the fixed base 3, allowing the pin shaft 16 to move vertically along the groove 18. To enable detachable installation of the spring pin within the fixed base 3, a plug 19 is provided at the opening of the vertical groove 18. A second spring 20 is fitted around the pin shaft 16 between the plug 19 and the raised edge 17. The second spring 20 always tends to push the pin shaft 16 into the positioning groove 15.

[0020] The pin 16 extends out of the transparent insulating sleeve 1 and is provided with a second insulating ring 21. When the first insulating ring 13 is pulled by the elastic force of the first spring 11 to move the contact block 10 away from the second conductive post 9, the second spring 20 can push the pin 16 into the positioning groove 15 to maintain the contact block 10 and the second conductive post 9 in a state of separation and de-energization.

[0021] like Figure 4 The diagram shows the device in a conductive path state. At this time, the contact block 10 is in contact with the second conductive post 9, the pin 16 is located at the bottom of the contact block 10, and the pin 16 is separated from the positioning groove 15. The voltage transformer forms a path of phase connection with the wire through the transformer screw plate 8, the first conductive post 7, the first conductive block 4, the fuse 6, the second conductive block 5, the second conductive post 9, the contact block 10, the wire screw plate 14, and the wire.

[0022] When it is necessary to disconnect the circuit, simply pull the first insulating ring 13 away from the end cap 2 to move the contact block 10 away from the second conductive post 9. During this process, the positioning groove 15 at the bottom of the contact block 10 gradually moves closer to the spring pin. When the positioning groove 15 moves to the position of the pin 16, under the elastic force of the second spring 20, the pin 16 moves upward and enters the positioning groove 15, thereby limiting the movement of the contact block 10. At this time, the contact block 10 is completely separated from the second conductive post 9, and the circuit is in a disconnected state, so that construction personnel can carry out operations in a power-off state.

[0023] When the work is completed and the disconnected line needs to be reconnected, simply pull down the second insulating ring 21 to overcome the elastic force of the second spring 20, causing the pin 16 to move downwards and separate from the positioning groove 15. After losing its limit, the contact block 10 will re-contact the second conductive post 9 under the elastic force of the first spring 11, thus forming an electrical connection. The overall operation is simple and easy to perform, which helps to improve the efficiency of the overall operation. The internal structure of the device is simplified while realizing the corresponding functions. The overall weight of the device is small and easy to install. It can stably and reliably realize the disconnection auxiliary function, ensure the normal operation of the power system, and reduce power outages and safety hazards caused by equipment failure.

[0024] Furthermore, in order to achieve a detachable connection between the fuse 6 and the first conductive block 4 and the second conductive block 5, such as... Figure 7 As shown, a first clamping bolt 22 that can be detached is installed inside the first conductive block 4, and a second clamping bolt 23 that can be detached is installed inside the second conductive block 5. The fuse 6 is installed between the studs of the first clamping bolt 22 and the second clamping bolt 23.

[0025] The fuse 6 can be securely installed by rotating the clamping bolt without affecting the electrical connection of the overall line. The fuse 6 can be replaced with a fuse of a suitable cross-sectional size according to different types of transformers or lines. The replacement of the fuse 6 is also easy to implement, thereby ensuring that the overall device can achieve the corresponding disconnection auxiliary function, ensuring that the staff can carry out relevant work in the disconnected state, and reconnect the circuit after the work is completed, ensuring the normal operation of the power system.

[0026] Furthermore, in order to adjust the installation angle position of the device according to different types of current transformers and wires, such as... Figure 8 and Figure 9 As shown, a gear welding plate 24 electrically connected to the contact block 10 is installed on the end cover 2. A first gear 25 is installed on the gear welding plate 24. A wire fixing plate 26 is provided on the wire screw plate 14. A second gear 27 that meshes with the first gear 25 is provided on the wire fixing plate 26.

[0027] A fastening bolt 28 is threadedly installed at the center of the second gear plate 27. A through hole that mates with the fastening bolt 28 is opened at the center of the first gear plate 25. A handle 29 and a limiting post 30 are provided at one end of the fastening bolt 28 that protrudes from the first gear plate 25. The diameter of the limiting post 30 is larger than the diameter of the fastening bolt 28. Rotating the handle 29 can make the second gear plate 27 engage and press against the first gear plate 25.

[0028] When it is necessary to adjust the angle position of the wire threaded plate 14 relative to the toothed plate welding plate 24, the handle 29 can be turned to move the limiting post 30 away from the first toothed plate 25. Then, the second toothed plate 27 is pulled to separate from the first toothed plate 25. Then, the angle position of the wire threaded plate 14 is adjusted according to the position of the transformer or the wire. After the adjustment is completed, the second toothed plate 27 is manually pressed to engage and press against the first toothed plate 25. The handle 29 is then turned in the opposite direction to reposition and clamp the limiting post 30 and the second toothed plate 27 to the first toothed plate 25.

[0029] The above-mentioned structure facilitates the positioning and installation of the device among current transformers and conductors in different installation locations, thereby ensuring that the overall device can achieve the corresponding disconnection auxiliary function, enabling personnel to carry out relevant work in the disconnected state, and reconnecting the circuit after the work is completed, thus ensuring the normal operation of the power system.

[0030] Furthermore, to prevent workers from accidentally pulling down the second insulating ring 21 during power-off operations, thus creating an electrical connection in the circuit and resulting in a dangerous live operation, such as... Figure 10-12 As shown, the positioning groove 15 has an inwardly protruding positioning block 31 on its side near the end cap 2. The positioning block 31 has a first inclined surface 32. The end of the pin 16 has an annular groove 33 that cooperates with the positioning block 31. When the annular groove 33 is engaged with the positioning block 31, the contact block 10 is moved and limited, maintaining an open circuit state separated from the second conductive post 9. After the annular groove 33 separates from the positioning block 31, the pin 16 can move out of the positioning groove 15, losing its restriction on the movement of the contact block 10.

[0031] To prevent accidental pulling down of the pin 16, an unlocking post 34 capable of vertically moving into the positioning groove 15 is installed inside the fixed base 3. The end of the unlocking post 34 has a second inclined surface 35 that engages with the first inclined surface 32. During its upward movement, the unlocking post 34 can push the contact block 10 away from the second conductive post 9 by engaging the second inclined surface 35 with the first inclined surface 32. After the unlocking post 34 moves upward until the second inclined surface 35 separates from the first inclined surface 32, the circumference of the unlocking post 34 contacts the positioning block 31. At this point, the unlocking post 34 can limit the horizontal movement of the contact block 10, keeping the contact block 10 in a state where it is disengaged from the positioning block 31 in the annular groove 33. The pin 16 can then be pulled down and moved out of the positioning groove 15. That is, only when the unlocking post 34 moves upward and pushes the contact block 10 to move horizontally until the annular groove 33 disengages from the positioning block 31 can the pin 16 be pulled down, thus forming a double-operation safety to avoid accidental pulling down of the pin 16 during power-off operations.

[0032] After the workers complete the power-off operation, they need to push the unlocking pin 34 upwards until the second inclined surface 35 separates from the first inclined surface 32. At this time, the annular groove 33 disengages from the positioning block 31, but still provides a horizontal limit for the contact block 10. After the workers return to a relatively safe environment on the ground, they can pull the second insulating ring 21 downwards using the hooked lever, causing the pin 16 to move downwards out of the positioning groove 15 and lose its horizontal movement limit on the contact block 10. This allows the contact block 10 to move again and contact the second conductive pin 9 to form a conductive path.

[0033] To ensure that the unlocking pin 34 moves out of the positioning groove 15 simultaneously while the pin 16 is pulled down, thus avoiding interference with the horizontal movement of the contact block 10 and achieving the reset of the unlocking pin 34 for double protection during the next disconnection assistance, a horizontally arranged reset rod 36 is installed on the pin 16, and a guide groove 37 that cooperates with the reset rod 36 is provided on the unlocking pin 34. When the pin 16 moves down from the positioning groove 15, it can simultaneously drive the unlocking pin 34 out of the positioning groove 15.

[0034] To prevent accidental pulling down of the second insulating ring 21 and resulting in an electrical connection of the circuit, thus creating a dangerous live operation, the movement of the pin 16 and contact block 10 can also be limited by... Figure 13-16 As shown in the structure, the positioning groove 15 has an inwardly protruding positioning block 31 on the side near the end cover 2, and the pin 16 has a slot 38 on one side that cooperates with the positioning block 31. When the slot 38 is on the positioning block 31, the pin 16 cannot move downward from the positioning groove 15. When the pin 16 rotates horizontally until the slot 38 separates from the positioning block 31, the pin 16 can move downward from the positioning groove 15 and no longer limit the horizontal movement of the contact block 10.

[0035] To restrict the horizontal rotation of the pin 16, a square post 39 is provided on the outer periphery of the transparent insulating sleeve 1. A square sleeve 40 is installed on the square post 39. The square post 39 can move vertically along the square sleeve 40, and the square post 39 and the square sleeve 40 can rotate synchronously.

[0036] A connecting block 41 is provided on the transparent insulating sleeve 1. Both ends of the connecting block 41 in the length direction are connected to the square sleeve 40 by a third spring 42. The two third springs 42 always tend to make the groove 38 on the pin 16 cooperate with the positioning block 31. That is, under the pushing force of the third springs 42 on both sides, the square sleeve 40 can be kept in a relatively stable state. In this state, the groove 38 on the pin 16 cooperates with the positioning block 31, and the pin 16 will not move downward from the positioning groove 15.

[0037] When the second insulating ring 21 is rotated horizontally, it can overcome the elastic force of the third spring 42 and separate the groove 38 on the pin 16 from the positioning block 31. After the groove 38 is separated from the positioning block 31, the pin 16 can move downward out of the positioning groove 15.

[0038] After the worker completes the power-off operation, they need to first rotate the pin 16 to separate the slot 38 from the positioning block 31 before pulling down the pin 16. This can, to some extent, prevent accidental pulling down of the pin 16. After the worker returns to a relatively safe environment on the ground, they can use the hooked lever to hook the second insulating ring 21, first overcoming the elastic force of the third spring 42 to drive the second insulating ring 21 and the pin 16 to rotate horizontally. After the slot 38 separates from the positioning block 31, the second insulating ring 21 is pulled down to release the horizontal movement limit on the contact block 10, allowing the contact block 10 to move again and contact the second conductive post 9 to form a conductive path.

[0039] After the pull rod is removed, the pin 16 will rotate horizontally to reset under the elastic force of the third spring 42. At the same time, the pin 16 is located at the bottom of the contact block 10, which is separated from the positioning groove 15, and will not affect the next disconnection auxiliary operation of the device.

[0040] Furthermore, in order to achieve stable horizontal rotation of the pin 16 within the positioning groove 15, a hemispherical head 43 is provided at the top of the pin 16, and a concave surface 44 that cooperates with the hemispherical head 43 is provided on the top surface of the positioning groove 15. The hemispherical head 43 and the concave surface 44 not only provide movement and installation limits for the pin 16, but also provide rotational guidance for the rotation of the pin 16, which can realize the unlocking action of first rotating the pin 16 and then pulling it down, thus achieving the corresponding function of avoiding misoperation.

[0041] The above structure will not affect the disconnection operation of the line. Simply pull the first insulating ring 13 to disengage the contact block 10 from the second conductive post 9, and let the pin 16 enter the positioning groove 15 to limit the movement of the contact block 10, thus maintaining the disconnected state of the line.

[0042] The aforementioned structure designed to prevent misoperation enables workers to perform power outage operations and ensures that the overall device can provide corresponding disconnection assistance functions. This ensures that workers can perform relevant operations while the device is disconnected, and that the circuit can be reconnected after the operation is completed, thus ensuring the normal operation of the power system.

[0043] The live-line disconnection auxiliary device described in this invention possesses multiple significant advantages. Its unique structural design fundamentally eliminates forced violations caused by the operating status of pole-mounted voltage transformers during live-line work, thus constructing a solid safety barrier for workers. It minimizes the risk of electric arc injuries, strictly complies with power safety regulations, and significantly reduces safety hazards. The various components of the device are easy to install and disassemble; the transformer bolt plate 8 and conductor bolt plate 14 can be securely installed with bolts, eliminating the need for complex procedures and specialized tools, greatly reducing installation difficulty, shortening installation time, and significantly improving work efficiency. It is particularly suitable for scenarios with limited pole-mounted space and complex working conditions. Compared to the traditional method of adding drop-out fuses, the device of this invention has a simple structure and fewer parts, significantly reducing equipment purchase costs. It is also easy to install, reducing labor input and rework costs, and simplifies subsequent maintenance, reducing maintenance costs and comprehensively improving the economic efficiency of the power system. Simultaneously, its stable and reliable disconnection auxiliary function ensures the normal operation of the power system, reduces power outages and safety hazards, and improves system reliability and stability. Furthermore, the structure, designed to prevent accidental operation, ensures the safe and orderly conduct of power outage work. These advantages make the device of this invention an ideal choice for live-line disconnection operations.

[0044] The technical solutions of this invention are not limited to the embodiments described herein. All technical contents not described in detail herein are well-known technologies.

Claims

1. A live disconnection auxiliary device, characterized in that: The device includes a transparent insulating sleeve (1), with end caps (2) installed at both ends along the length of the transparent insulating sleeve (1). A fixing seat (3) is provided inside the transparent insulating sleeve (1) between the two end caps (2). A first conductive block (4) and a second conductive block (5) are detachably installed on the fixing seat (3). A fuse (6) connects the first conductive block (4) and the second conductive block (5). A first conductive post (7) is provided at the end of the first conductive block (4) away from the fuse (6). A transformer screw plate is installed at the end of the first conductive post (7) that extends out of the end cap (2). 8) The second conductive block (5) has a second conductive post (9) at one end away from the fuse (6). A contact block (10) that can be electrically connected to the second conductive post (9) is installed in the fixing seat (3). A first spring (11) is provided between the contact block (10) and the fixing seat (3). The first spring (11) always tends to push the contact block (10) to contact the second conductive post (9). A pull rod (12) is also provided on the contact block (10). A first insulating ring (13) is provided at one end of the pull rod (12) that protrudes from the end cover (2). A wire screw plate (14) electrically connected to the contact block (10) is installed on one end cap (2). A spring pin is installed in the fixing seat (3) at the bottom of the contact block (10). A positioning groove (15) that cooperates with the spring pin is opened at the bottom of the contact block (10). The spring pin includes a pin shaft (16). A protruding edge (17) is provided on the outer periphery of the pin shaft (16) located in the fixing seat (3). A vertical groove (18) that cooperates with the protruding edge (17) is opened in the fixing seat (3). A plug (19) is provided at the opening of the vertical groove (18). Between the plug (19) and the protruding edge (17) A second spring (20) is fitted around the outer periphery of the pin (16). The second spring (20) always tends to push the pin (16) into the positioning groove (15). The end of the pin (16) extending out of the transparent insulating sleeve (1) is provided with a second insulating ring (21). When the first insulating ring (13) is pulled by the elastic force of the first spring (11) to move the contact block (10) away from the second conductive post (9), the second spring (20) can push the pin (16) into the positioning groove (15) to maintain the contact block (10) and the second conductive post (9) in a state of separation and de-energization.

2. The live disconnection auxiliary device according to claim 1, characterized in that: The first conductive block (4) is fitted with a first clamping bolt (22) that can be disassembled and installed, and the second conductive block (5) is fitted with a second clamping bolt (23) that can be disassembled and installed. The fuse (6) is installed between the studs of the first clamping bolt (22) and the second clamping bolt (23).

3. The live disconnection auxiliary device according to claim 1, characterized in that: A gear welding plate (24) with electrical connection is installed on the end cap (2) near the contact block (10). A first gear (25) is installed on the gear welding plate (24). A wire fixing plate (26) is provided on the wire screw plate (14). A second gear (27) that meshes with the first gear (25) is provided on the wire fixing plate (26). A fastening bolt (28) is threaded at the center of the second gear (27). A through hole that matches the fastening bolt (28) is opened at the center of the first gear (25). A handle (29) and a limiting post (30) are provided at one end of the fastening bolt (28) that protrudes from the first gear (25). The diameter of the limiting post (30) is larger than the diameter of the fastening bolt (28). Rotating the handle (29) can make the second gear (27) mesh and press against the first gear (25).

4. The live disconnection auxiliary device according to claim 1, characterized in that: The positioning groove (15) has an inwardly protruding positioning block (31) on the side near the end cap (2). The positioning block (31) has a first inclined surface (32). The end of the pin (16) has an annular groove (33) that cooperates with the positioning block (31). After the annular groove (33) separates from the positioning block (31), the pin (16) can move out of the positioning groove (15). The fixing seat (3) is equipped with an unlocking pin (34) that can move vertically into the positioning groove (15). The end of the unlocking pin (34) has a first inclined surface (32) that cooperates with the first inclined surface (31). 2) The second inclined surface (35) is matched. After the unlocking post (34) moves up to the second inclined surface (35) and separates from the first inclined surface (32), the contact block (10) remains in the state of disengagement between the annular groove (33) and the positioning block (31). A horizontally arranged reset rod (36) is installed on the pin (16). A guide groove (37) that matches the reset rod (36) is opened on the unlocking post (34). When the pin (16) moves down from the positioning groove (15), it can simultaneously drive the unlocking post (34) to move out of the positioning groove (15).

5. The live disconnection auxiliary device according to claim 1, characterized in that: The positioning groove (15) has an inwardly protruding positioning block (31) on the side near the end cover (2). The pin (16) has a slot (38) on one side that cooperates with the positioning block (31). The pin (16) extends out of the outer periphery of the transparent insulating sleeve (1) and has a square post (39). A square sleeve (40) is installed on the square post (39). The square post (39) can move vertically along the square sleeve (40). The square post (39) and the square sleeve (40) can rotate synchronously. A connecting block is provided on the transparent insulating sleeve (1). 41) Both ends of the connecting block (41) in the length direction are connected to the square sleeve (40) by a third spring (42). The two third springs (42) always tend to make the slot (38) on the pin (16) cooperate with the positioning block (31). The horizontal rotation of the second insulating ring (21) can overcome the elastic force of the third spring (42) and make the slot (38) on the pin (16) separate from the positioning block (31). After the slot (38) separates from the positioning block (31), the pin (16) can move downward out of the positioning groove (15).

6. The live disconnection auxiliary device according to claim 5, characterized in that: The top of the pin (16) is provided with a hemispherical head (43), and the top surface of the positioning groove (15) is provided with a concave surface (44) that cooperates with the hemispherical head (43).

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