A knife switch opening distance adjustment jig with angle limit

Abstract

The invention discloses a disconnecting link opening range adjusting fixture with angle limitation. The disconnecting link opening range adjusting fixture with angle limitation comprises an adjusting spindle, a fork-shaped prop rod, an adjusting rod and a clamping seat, wherein a left adjusting threaded hole and a right adjusting threaded hole are respectively formed in the left end part and the right end part of the adjusting spindle; the rotating directions of internal threads of the left adjusting threaded hole and the right adjusting threaded hole are opposite; the fork-shaped prop rod is formed by connecting a fork-shaped prop rod fork part and a fork-shaped prop rod rod part with forward-direction external threads; the fork-shaped prop rod rod part is in threaded connection with the left adjusting threaded hole; reverse external threads are arranged on the adjusting rod; the adjusting rod is in threaded connection with the right adjusting threaded hole; the clamping seat is hinged to the right end part of the adjusting rod; a clamping slot is formed in one side, back to the adjusting rod, of the clamping seat; an angle limitation device is arranged at a hinged position of the triangular clamping seat and the adjusting rod. According to the disconnecting link opening range adjusting fixture with angle limitation, a disconnecting link opening range can be quickly adjusted in place, so that the efficiency is improved, and the maintenance time is shortened; the angle limitation device can limit a positioning variable angle of the clamping seat in a certain angle range, so that the close cooperation is realized.

Description

technical field [0001] The invention belongs to the technical field of substation maintenance, and in particular relates to a knife switch opening distance adjustment jig with angle limit. Background technique [0002] The high-voltage isolating switch is a three-phase AC 50Hz outdoor high-voltage electrical appliance, which is used in the power system with a rated voltage of 12kV and below, for the switching of the line under the condition of no load and voltage, and for the electrical equipment such as the high-voltage busbar and circuit breaker to be overhauled. Electrically isolated from live lines. The opening distance of the knife switch refers to the minimum distance between the moving and static contacts when the switch or circuit breaker is in the off position. For the three-phase linkage isolating switch, when the contacts are in contact, the three phases are synchronized, the distance is the same, and after closing, the insertion depth is the same, which meets th...

AI Technical Summary

Problems solved by technology

[0004] During the installation and maintenance process of the knife switch, the adjustment of the opening distance of the knife switch is an important link. Only when the opening distance is adjusted in place can the connecting rod of the knife switch and the mechanism be welded to the main knife shaft of the knife switch through the crank arm. This seems simple. If the measurement of the opening distance of the contact is not in place, the mechanism linkage will be welded on the main knife shaft. During the manual opening and closing operation of the mechanism, the stroke will be too short or too long and the operation will not be in place. The entire knife switch debugging work has been wasted; the opening distance of the knife switch is not in place, and when the opening distance is too large, the knife switch is closed. Due to insufficient contact hardness, the contacts are overheated, the contact resistance is increased, the contacts are overheated, and even welded or burnt. damage

If the opening distance is too small, the electrical insulation distance is not enough, which may cause arcing or grounding

[0005] In summary, the adjustment of the opening distance of the knife switch directly affects the operating state and service life of the knife switch, and even affects the safe and reliable operation of the power grid equipment.

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