Double-acting high-voltage sulfur hexafluoride circuit breaker and double-acting transmission device thereof

Abstract

The invention relates to a double-acting high-voltage sulfur hexafluoride circuit breaker. A double-acting transmission device is arranged between a moving contact assembly and a fixed arc contact. The double-acting transmission device comprises a driving gear rack and a fixed arc contact gear rack which are arranged in parallel and extend along the moving direction of the moving contact assembly. A gear which is simultaneously engaged with the two gear racks in a driving way is arranged between the driving gear rack and the fixed arc contact gear rack. A rib which is in parallel with the driving gear rack is arranged on one side of the back surface of the fixed arc contact gear rack. A roller which is simultaneously in rolling fit with the rib and the back surface of the fixed arc contact gear rack is arranged between the rib and the fixed arc contact gear rack. The lower end parts of the driving gear rack and the rib are fixedly connected onto the moving contact assembly and linearly move back and forth with the moving contact assembly. The driving gear rack is connected with the rib through a linkage plate. The driving gear rack drives the fixed arc contact gear rack to reversely move through the gear. The fixed arc contact gear rack is fixedly connected onto a fixed arc contact to drive the fixed arc contact to linearly move back and forth. The invention additionally relates to the double-acting transmission device of the double-acting high-voltage sulfur hexafluoride circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of high-voltage sulfur hexafluoride circuit breakers, and in particular relates to a double-acting high-voltage sulfur hexafluoride circuit breaker and a double-acting transmission device thereof. Background technique [0002] With the continuous and in-depth research on the structure of the high-voltage sulfur hexafluoride circuit breaker arc extinguishing chamber, people have invented a self-energy thermal expansion high-voltage sulfur hexafluoride circuit breaker on the basis of the single-pressure compressed gas type sulfur hexafluoride circuit breaker arc extinguishing chamber The arc extinguishing chamber of the arc breaker uses the energy of the arc itself to greatly reduce the operating work, which is a big step forward in technology. Even so, due to the current single-pressure and self-energy circuit breaker interrupters, the opening and closing of the dynamic and static contacts are fixed by the st...

AI Technical Summary

Problems solved by technology

Chinese patent document CN101599389B discloses a double-acting self-energy thermal expansion type high-voltage sulfur hexafluoride circuit breaker interrupter with this function, which includes a moving contact mechanism and a static contact installed directly above the moving contact mechanism The head mechanism, the static contact mechanism includes the static main contact, the static arc contact seat and the static arc contact, the moving contact mechanism includes the arc extinguishing nozzle, the moving main contact and the moving arc contact, the moving main contact and the moving arc The contacts correspond to the static main contact and the static arc contact respectively. The arc extinguishing nozzle includes the main nozzle and the inner nozzle coaxially arranged inside and outside, and the moving arc contact is located inside the inner nozzle; The connected push-pull rod drives the shift fork to rotate, and then through the cooperation between the pin shaft connecting the static arc contact and the shift fork and the horizontal pin hole, the static arc contact is driven to move up and down along the vertical guide rail to realize the moving contact and static arc contact. The reverse movement of this kind of double-action transmission device in the form of a shift fork and a guide rail is not only complex in structure and takes up a large space, but also requires high precision in processing and assembly. The production process is relatively complicated, and processing and assembly are difficult. In addition, the transmission ratio of the fork transmission is not easy to control, making it difficult to control the action time and movement distance of the static arc contact at a constant value, and it is prone to lagging of the static arc contact , the stability of its action time is poor

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