CN-121983447-A - Five-prevention mechanical interlocking structure and ring main unit

CN121983447ACN 121983447 ACN121983447 ACN 121983447ACN-121983447-A

Abstract

The invention provides a five-prevention mechanical interlocking structure and a ring main unit, wherein the five-prevention mechanical interlocking structure comprises a three-station interlocking plate, a breaker interlocking plate, a cable chamber door interlocking plate and a three-station indication board, wherein the plane where the length and the width of the three-station interlocking plate are located is vertical to a horizontal plane, the breaker interlocking plate is arranged on one side of the three-station interlocking plate in the thickness direction, the cable chamber door interlocking plate is arranged on one side of the three-station interlocking plate in the thickness direction, the three-station indication board is arranged on one side of the three-station interlocking plate in the thickness direction, and the three-station interlocking plate, the breaker interlocking plate and the cable chamber door interlocking plate can move up and down and can rotate in a vertical plane. According to the invention, through integrating the three stations, the circuit breaker, the cable chamber door interlocking plate and the indication board, the vertical arrangement, the up-and-down movement and the vertical rotation are adopted, so that the types of parts and the assembly flow are simplified.

Inventors

ZHENG WEIXIA
SHI ZHIKUN
NIE XINGXING
HUANG TAO
WAN YUAN
WANG YI
XU SHAOJUN
CHEN WEN
LUO BANG
XIONG CAIMING

Assignees

江西泰开成套电器有限公司

Dates

Publication Date: 20260505
Application Date: 20260304

Claims (10)

1. A five-prevention mechanical interlocking structure is characterized in that: The three-station interlocking plate comprises a three-station interlocking plate, a breaker interlocking plate, a cable chamber door interlocking plate and a three-station indication board; The length and width of the three-station interlocking plate are perpendicular to a horizontal plane, the breaker interlocking plate is arranged on one side of the three-station interlocking plate in the thickness direction of the three-station interlocking plate, the cable chamber door interlocking plate is arranged on one side of the three-station interlocking plate in the thickness direction of the three-station interlocking plate, the breaker interlocking plate and the cable chamber door interlocking plate can move up and down, and the three-station indication plate can rotate in a vertical plane; The three-station interlocking plate is provided with a breaker closing blocking plate, a three-station blocking plate, an isolation blocking plate, a first grounding blocking plate and a first working blocking plate, wherein the cable chamber door interlocking plate is provided with a cable chamber door lock limiting protrusion, a cable chamber door limiting plate, a breaker opening blocking plate, a second grounding blocking plate and a second working blocking plate; The three-station indication board is located right above the cable chamber door lock limiting protrusion, and the three-station limiting board is located right below the three-station blocking board.
2. A five-way mechanical interlock according to claim 1 and wherein: The novel door lock further comprises a cable door lock extension plate and a cable door lock bolt, wherein the cable door lock extension plate is connected to one surface of the cable door lock extension plate, which is far away from the three-station lock extension plate, the cable door lock bolt is connected to the lower end of the cable door lock extension plate, and the cable door lock bolt is located below the cable door lock extension plate.
3. A five-way mechanical interlock according to claim 1 and wherein: the breaker closing blocking plate is formed by extending downwards from the bottom of the plane where the length and the width of the three-station interlocking plate are positioned, and/or The three-station blocking plate is formed by bending and extending from the bottom of the three-station interlocking plate to a direction away from the cable chamber door interlocking plate, and/or The isolation blocking plate extends from the side edge of the three-station interlocking plate to the direction close to the cable chamber door interlocking plate and/or The first grounding baffle plate is formed by extending outwards from the side edge of the three-station interlocking plate, and/or The first working blocking plate extends outwards from the side edge of the three-station interlocking plate.
4. A five-way mechanical interlock according to claim 1 and wherein: The cable chamber door lock limiting protrusion extends from one surface of the cable chamber door interlocking plate facing the three-station indication board to a direction approaching the three-station indication board, and/or The cable chamber door opening plate is formed by bending and extending from the bottom of the plane where the length and the width of the cable chamber door interlocking plate are positioned to the direction close to the three-station interlocking plate, and/or The breaker opening blocking plate is formed by extending downwards from the bottom and/or The second grounding baffle plate is formed by extending outwards from the side edge of the cable chamber door interlocking plate, and/or The second working blocking plate is formed by extending outwards from the side edge of the cable chamber door interlocking plate.
5. A five-way mechanical interlock according to claim 1 and wherein: The main body of the three-station indication board is circular, a notch is formed in the edge of the main body of the three-station indication board, an indication board extending plate is arranged on one side of the notch, and the indication board extending plate extends outwards from the three-station indication board in the radial direction.
6.A five-way mechanical interlock according to claim 1 and wherein: The circuit breaker interlocking plate is further provided with a cable chamber door interlocking plate limiting plate, and the cable chamber door interlocking plate limiting plate is located above the three-station limiting plate and right above the cable chamber door limiting plate.
7. A five-way mechanical interlock according to any one of claims 1 to 6 and wherein: the three-station interlocking plate further comprises a moving plate, and the moving plate extends from the side edge of the three-station interlocking plate to the direction close to the cable chamber door interlocking plate; the moving plate is positioned above the isolation blocking plate.
8. A looped netowrk cabinet, its characterized in that: the ring main unit comprises the five-prevention mechanical interlocking structure as claimed in any one of claims 1 to 7.
9. The ring main unit as recited in claim 8, wherein: The ring main unit comprises a breaker interlocking rod, one end of the breaker interlocking rod is connected with the breaker interlocking plate, the breaker interlocking rod is arranged obliquely to the horizontal plane, and the breaker interlocking rod can rotate to drive the breaker interlocking plate to move up and down.
10. The ring main unit as recited in claim 8, wherein: The five-prevention mechanical interlocking structure comprises a cable chamber door lock extension plate and a cable chamber door lock bolt, wherein the cable chamber door lock extension plate is connected to one surface of the cable chamber door lock extension plate, which is far away from the three-station interlocking plate, the cable chamber door lock bolt is connected to the lower end of the cable chamber door lock extension plate, and the cable chamber door lock bolt is positioned below the cable chamber door lock extension plate; the ring main unit comprises a cable chamber door, the cable chamber door is arranged below the five-prevention mechanical interlocking structure, and a cable chamber door lock tongue can be abutted to the upper surface of the cable chamber door.

Description

Five-prevention mechanical interlocking structure and ring main unit Technical Field The invention relates to the field of switch cabinets, in particular to a five-prevention mechanical interlocking structure and a ring main unit. Background The five-prevention system is core protection equipment for preventing electrical misoperation of the transformer substation, and is important to guaranteeing safe and stable operation of the transformer substation and avoiding artificial operation risks. In the daily switching operation, the simulation preview and the logic verification of the five-prevention system are required to be passed, so that the integrity and the functional perfection of the five-prevention system are ensured, and the five-prevention system is a key measure for preventing and reducing the occurrence rate of power grid accidents. With the continuous expansion of the power grid scale, the power load of users is increased, the requirements on the power supply reliability are also improved, and the position and the effect of the five-prevention system are more remarkable. However, the existing five-prevention interlocking scheme generally has the problems of complex structure, various parts and the like, so that the equipment assembly process is complicated, and the actual construction difficulty is high. Disclosure of Invention The first object of the invention is to provide a five-prevention mechanical interlocking structure which is used for solving the existing problems. The second object of the invention is to provide a ring main unit, which comprises the five-prevention mechanical interlocking structure. In order to achieve the first aim, the invention provides a five-prevention mechanical interlocking structure which comprises a three-station interlocking plate, a breaker interlocking plate, a cable chamber door interlocking plate and three-station indication plates, wherein the plane where the length and the width of the three-station interlocking plate are located is perpendicular to a horizontal plane, the breaker interlocking plate is arranged on one side of the three-station interlocking plate in the thickness direction, the cable chamber door interlocking plate is arranged on one side of the three-station interlocking plate in the thickness direction, the three-station indication plates are arranged on one side of the three-station interlocking plate in the thickness direction, the three-station interlocking plate, the breaker interlocking plate and the cable chamber door interlocking plate can move up and down, the three-station indication plates can rotate in a vertical plane, the three-station interlocking plate is provided with a breaker closing plate, a three-station blocking plate, a separation blocking plate, a first grounding blocking plate and a first working blocking plate, the cable chamber door locking plate is arranged on the three-chamber door interlocking plate, a cable chamber door locking limiting bulge, a cable chamber door limiting plate, a breaker opening blocking plate, a second grounding blocking plate and a second working blocking plate, the three-blocking plate are arranged on one side, the three-station locking plate is arranged on the three-station locking plate, and the three-station locking plate is located right below the three-station door locking plate, and is located below the three-station locking plate. According to the scheme, the three-station circuit breaker, the cable chamber door interlocking plate and the indication board are integrated, and the vertical arrangement, the up-and-down movement and the vertical rotation are matched, so that the types of parts and the assembly flow are simplified. The blocking structure on each interlocking plate corresponds to the limiting protrusion accurately, misoperation is prevented from the mechanical structure, the occurrence rate of power grid accidents is reduced, and the high requirements of power distribution network development on power supply reliability are met. The device has the advantages of simple structure, complete functions, convenient operation, greatly reduced number of assembly parts and high protection efficiency. The further scheme is, still include cable room door lock extension board and cable room door spring bolt, cable room door lock extension board is connected in cable room door interlock board one side of keeping away from three station interlock board, and cable room door lock spring bolt is connected in cable room door lock extension board's lower extreme, and cable room door lock spring bolt is located cable room door interlock board's below. According to the scheme, the cable chamber door lock extension plate and the lock tongue are additionally arranged, and the cable chamber door lock interlock plate is connected through the extension plate, so that the lock tongue extends to the lower part of the interlock plate, and the installation position and the stress structure of the