Self-locking device for off-circuit tap-changer hand operation mechanism

Abstract

The invention discloses a self-locking device for an off-circuit tap-changer hand operation mechanism, which comprises a handle and gear self-locking device and an end-to-end self-locking device. The handle and gear self-locking device is formed in a way that: a self-locking gear and a self-locking wheel are connected to an input shaft; the self-locking gear is meshed with an upper middle gear ona middle shaft; a transition gear on a transition shaft is meshed with a lower middle gear and a bevel gear I on a bevel gear shaft; and a push wheel is in fit with a self-locking pin connected to a switch lock. The end-to-end self-locking device is formed in a way that: a limiting post with a spring is connected to a pedestal, and forms fit with an end-to-end limiting block fixed on a large gearand a limiting wheel on an output shaft. The self-locking device has a simple structure and comprehensive functions, is easy to manufacture and assemble and arranged on the hand operation mechanism for use, completely solves the problem of gear slippery caused by the movement of a handle after a gear is shifted in place, can prevent overrange running caused by improper gear shifting from causing equipment damages by the end-to-end self-locking, and improves the reliability and safety of equipment; and unlocking can be performed only by a key after handle and gear self-locking so as to achievesafety and reliability in use.

Description

technical field

[0001] The invention relates to a safety device on an operating mechanism of a tap changer of a transformer, in particular to a self-locking device of a manual operating mechanism of an off-excitation tap changer. Background technique

[0002] In the field of power transmission and transformation, off-excitation tap-changers have been widely used as control equipment for power transformers, such as strip tap-changers and cage tap-changers, which control the moving contacts and static contacts through horizontal movement and rotational movement respectively. The contacts are connected in different ways, thereby changing the number of turns of the transformer coil and adjusting the voltage. The above two tap changers adjust the voltage through the rotation of the rotary shaft.

[0003] Chinese patent application No. 201010271414.X "Manual operating device for non-excitation tap changer" provides a kind of eye-catching display, intuitive reading, complete funct...

Examples

Embodiment Construction

[0016] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] The lower end of the input shaft 36 has a worm screw 36-1, the upper end surface has an arc-shaped groove, the lower end of the handle 38 is a through hole, and the handle 38 is embedded in the arc-shaped groove on the upper end surface of the input shaft 36 with a pin 38-1 to form a whole. , the input shaft is connected on the base 25 and the bottom plate 27 through bearings.

[0018] The intermediate shaft 56 is connected with the upper and lower intermediate gears 601 and 602 with collars respectively, and is fixed on the base 25 through bearings, the transition shaft 57 is fixed on the base 25 through bearings, and the transition gear 603 connected at the end is connected to the lower intermediate gear. 602 meshes, and the upper intermediate gear 601 meshes with the self-locking gear 43 on the input shaft 36, as Figure 7 , Figure 8 , Fig...

technical field

[0001] The invention relates to a safety device on an operating mechanism of a tap changer of a transformer, in particular to a self-locking device of a manual operating mechanism of an off-excitation tap changer. Background technique

[0002] In the field of power transmission and transformation, off-excitation tap-changers have been widely used as control equipment for power transformers, such as strip tap-changers and cage tap-changers, which control the moving contacts and static contacts through horizontal movement and rotational movement respectively. The contacts are connected in different ways, thereby changing the number of turns of the transformer coil and adjusting the voltage. The above two tap changers adjust the voltage through the rotation of the rotary shaft.

[0003] Chinese patent application No. 201010271414.X "Manual operating device for non-excitation tap changer" provides a kind of eye-catching display, intuitive reading, complete funct...

Examples

Embodiment Construction

[0016] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] The lower end of the input shaft 36 has a worm screw 36-1, the upper end surface has an arc-shaped groove, the lower end of the handle 38 is a through hole, and the handle 38 is embedded in the arc-shaped groove on the upper end surface of the input shaft 36 with a pin 38-1 to form a whole. , the input shaft is connected on the base 25 and the bottom plate 27 through bearings.

[0018] The intermediate shaft 56 is connected with the upper and lower intermediate gears 601 and 602 with collars respectively, and is fixed on the base 25 through bearings, the transition shaft 57 is fixed on the base 25 through bearings, and the transition gear 603 connected at the end is connected to the lower intermediate gear. 602 meshes, and the upper intermediate gear 601 meshes with the self-locking gear 43 on the input shaft 36, as Figure 7 , Figure 8 , Fig...

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