CN-122025463-A - Electrified disconnection auxiliary device

CN122025463ACN 122025463 ACN122025463 ACN 122025463ACN-122025463-A

Abstract

The electrified disconnection auxiliary device effectively isolates electrified parts by arranging insulating structures such as a transparent insulating sleeve, an end cover and the like, and provides reliable safety protection for operators. When the live line is disconnected and the switch lead wire is connected, even if unexpected situations occur, the operators can be prevented from being injured by electric arcs to the greatest extent, the personal safety of the operators is practically guaranteed, the requirements of electric power safety working regulations are met, and the potential safety hazard that the operators are forced to operate against rules due to the fact that the voltage transformer on the pole cannot exit from the running state is effectively solved. Meanwhile, the device is also suitable for a new installation scene of the pole-mounted voltage transformer, has the characteristics of simplicity and convenience in installation and low cost, can effectively reduce the installation difficulty, saves the installation cost, and improves the operation and maintenance efficiency and reliability of a power system.

Inventors

LUO HU
ZHAO LEI
LIU ZHIJIN
WANG CHENG
ZHANG QI
WANG ZILONG
Ji yangxi
SONG YIFAN
YU ZHIYUAN
LIU QINGPENG
WU CHENGTAI
ZHANG JIXUAN

Assignees

国网山东省电力公司枣庄供电公司

Dates

Publication Date: 20260512
Application Date: 20260323

Claims (6)

1. The electrified disconnection auxiliary device is characterized by comprising a transparent insulating sleeve (1), wherein end covers (2) are arranged at two ends of the transparent insulating sleeve (1) in the length direction, a fixed seat (3) is arranged in the transparent insulating sleeve (1) between the end covers (2) at two sides, a first conductive block (4) and a second conductive block (5) are detachably arranged on the fixed seat (3), a fuse wire (6) is connected between the first conductive block (4) and the second conductive block (5), one end of the first conductive block (4) far away from the fuse wire (6) is provided with a first conductive column (7), the end part of the first conductive column (7) extending out of the end cover (2) is provided with a mutual inductor threaded plate (8), one end of the second conductive block (5) far away from the fuse wire (6) is provided with a second conductive column (9), a contact block (10) capable of being electrically connected with the second conductive column (9) is arranged in an inner fit manner on the fixed seat (3), a first spring (11) is arranged between the contact block (10) and the fixed seat (3), one end of the first conductive block (4) far away from the fuse wire (6) is provided with a first conductive column (7), one end of the first conductive column (10) is provided with a contact ring (12) which is provided with a contact trend, and one end (12) of the first conductive column (12) is further extended out of the first conductive column (12), install wire spiral-lock board (14) that are connected with contact block (10) on end cover (2) near first insulating ring (13) one side, install the spring pin in fixing base (3) of contact block (10) bottom, install with spring pin matched with constant head tank (15) bottom contact block (10), the spring pin is including round pin axle (16), round pin axle (16) periphery that is located fixing base (3) is equipped with protruding edge (17), set up in fixing base (3) with protruding edge (17) matched with perpendicular groove (18), the opening part of perpendicular groove (18) is equipped with blanking cap (19), the round pin axle (16) periphery cover between blanking cap (19) and protruding edge (17) is equipped with second spring (20), trend in second spring (20) have the promotion round pin axle (16) enter into constant head tank (15) all the time, the one end that round pin axle (16) stretches out transparent insulating sleeve (1) is equipped with second insulating ring (21), overcome the elasticity pulling first insulating ring (13) and let contact block (10) keep away from second insulating ring (9) and keep away from in the electric conduction post (9) and keep away from the electric conduction post (9) and keep the state.
2. A charged disconnection assisting device according to claim 1, wherein the first conductive block (4) is internally provided with a first detachable compression bolt (22) in a matched manner, the second conductive block (5) is internally provided with a second detachable compression bolt (23) in a matched manner, and the fuse wire (6) is arranged between the studs of the first compression bolt (22) and the second compression bolt (23).
3. The electrified disconnection auxiliary device according to claim 1, wherein a fluted disc welding plate (24) which is electrically connected is arranged on the end cover (2) close to one side of the contact block (10), a first fluted disc (25) is arranged on the fluted disc welding plate (24), a wire fixing plate (26) is arranged on the wire welding plate (14), a second fluted disc (27) meshed with the first fluted disc (25) is arranged on the wire fixing plate (26), a fastening bolt (28) is arranged at the central position of the second fluted disc (27) in a threaded manner, a through hole matched with the fastening bolt (28) is formed in the central position of the first fluted disc (25), a handle (29) and a limiting column (30) are arranged at one end of the fastening bolt (28) penetrating out of the first fluted disc (25), the diameter of the limiting column (30) is larger than that of the fastening bolt (28), and the second fluted disc (27) can be meshed and pressed on the first fluted disc (25) by rotating the handle (29).
4. The electrified disconnection auxiliary device is characterized in that a positioning block (31) protruding inwards is arranged on the side surface, close to the end cover (2), of the positioning groove (15), a first inclined surface (32) is arranged on the positioning block (31), an annular groove (33) matched with the positioning block (31) is arranged at the end part of the pin shaft (16), after the annular groove (33) is separated from the positioning block (31), the pin shaft (16) can be moved out of the positioning groove (15), an unlocking column (34) capable of vertically moving into the positioning groove (15) is arranged in the fixed seat (3), a second inclined surface (35) matched with the first inclined surface (32) is arranged at the end part of the unlocking column (34), after the second inclined surface (35) is separated from the first inclined surface (32), the contact block (10) is maintained in a state that the annular groove (31) is separated from the positioning block (31), a horizontally arranged reset rod (36) is arranged on the pin shaft (16), a guide groove (37) matched with the reset rod (36) is arranged on the pin shaft (16), and the pin shaft (16) can be moved out of the positioning groove (15) synchronously.
5. The electrified disconnection auxiliary device is characterized in that the positioning groove (15) is provided with a positioning block (31) protruding inwards on the side surface close to the end cover (2), one side of the pin shaft (16) is provided with a clamping groove (38) matched with the positioning block (31), the periphery of the pin shaft (16) extending out of the transparent insulating sleeve (1) is provided with a square column (39), the square column (39) is provided with a square sleeve (40) in a matched mode, the square column (39) can vertically move along the square sleeve (40), the square column (39) and the square sleeve (40) can synchronously rotate, a connecting block (41) is arranged on the transparent insulating sleeve (1), a third spring (42) is connected between two ends of the length direction of the connecting block (41) and the square sleeve (40), the two third springs (42) are always provided with a trend that the clamping groove (38) on the pin shaft (16) is matched with the positioning block (31), the clamping groove (38) on the pin shaft (16) can be separated from the positioning block (31) by horizontally rotating the second insulating ring (21) in a mode, and the clamping groove (38) on the pin shaft (16) can be separated from the positioning block (31) by overcoming the elasticity of the third spring (42), and can be moved out of the positioning block (15) in the axial direction.
6. The electrified disconnection assisting device according to claim 5, wherein the top of the pin shaft (16) is provided with a semi-ball head (43), and the top surface of the positioning groove (15) is provided with a concave surface (44) matched with the semi-ball head (43).

Description

Electrified disconnection auxiliary device Technical Field The invention relates to the technical field of auxiliary equipment for disconnection of a switch lead, in particular to an electrified disconnection auxiliary device. Background In the field of power distribution automation, a pole-mounted voltage transformer is key equipment which is indispensable for realizing a power distribution automation function by a pole-mounted intelligent switch. In the actual operation and maintenance operation of the power system, when the intelligent on-off and on-off lead connection operation of the on-pole switch is carried out in a live or loaded new installation, replacement and removal process, the situation that the on-pole voltage transformer is connected in a live mode or is withdrawn is often faced. According to the power safety operation regulations of the national power grid company, part 8, distribution part 11.3.3, clearly specifies that before a live line is disconnected and an empty line is connected, the fact that all switches and knife switches at the back end are disconnected and the transformer and the voltage transformer are out of operation must be confirmed. The provision aims to ensure the safety of personnel and equipment in the live working process and avoid safety accidents caused by illegal operation. However, in an actual field operation environment, there are two problems to be solved. First, the partial on-pole voltage transformer is directly connected with the side lead of the switching power supply, and no disconnecting link is arranged between the partial on-pole voltage transformer and the line T contact to isolate the power supply. The design defect causes that when the live-line disconnection switch is in a lead operation, the pole-mounted voltage transformer cannot exit from an operation state, so that live-line operators have to face the dilemma of forced illegal operation, and the personal safety of the operators is seriously threatened. Secondly, in the new switch installation process, in order to prevent the synchronous electrification of the pole-mounted voltage transformer when the switch lead is electrified, the prior measures are to add two drop-out fuses between the voltage transformer and the pole-mounted switch. Although this approach can meet the requirements of security regulations, it brings about a number of drawbacks. On the one hand, the installation difficulty is obviously increased, and professionals are required to spend more time and effort for operation, and on the other hand, the cost is greatly increased, so that the purchase cost of equipment is increased, and the later maintenance cost is possibly increased due to complex installation. Furthermore, adding equipment means that failure points increase, reducing the reliability of the overall power system. Currently, chinese publication nos. "201410291184.1" and "202023199798.7" mention a portable single-phase air bypass switch, which can implement a corresponding off function to some extent. However, it has significant disadvantages in that the overall structure is heavy, which makes installation in environments where space is limited and the load carrying capacity is relatively weak, such as a pole-mounted voltage transformer, extremely inconvenient. Meanwhile, the structure is complex, the installation difficulty and cost are further increased, and the requirements of convenience and economy in actual operation are difficult to meet. Based on the current situation, it is urgent to develop an auxiliary device specially used for live disconnecting the lead of the voltage transformer on the post. Disclosure of Invention The invention aims to provide an electrified disconnection auxiliary device which is suitable for a new installation scene of a pole-mounted voltage transformer, can realize a corresponding disconnection auxiliary function and solves the problems in the prior art. The technical scheme adopted for solving the technical problems is as follows: the electrified disconnection auxiliary device comprises a transparent insulating sleeve, end covers are arranged at two ends of the length direction of the transparent insulating sleeve, a fixed seat is arranged in the transparent insulating sleeve between the end covers at two sides, a first conductive block and a second conductive block are detachably arranged on the fixed seat, a fuse wire is connected between the first conductive block and the second conductive block, one end of the first conductive block, which is far away from the fuse wire, is provided with a first conductive column, the end of the first conductive column, which extends out of the end cover, is provided with a transformer screw plate, one end of the second conductive block, which is far away from the fuse wire, is provided with a second conductive column, a contact block which can be electrically connected with the second conductive column is cooperatively arranged in the fixed seat