SU420033A1 - MECHANISM OF FIXING AND BLOCKING OF DRAWN PARTS OF CELLS OF COMPLETE DISTRIBUTION DEVICES - Google Patents

Description

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This invention relates to switchgear assemblies. It can be used for fixing the withdrawable parts of the switch of complete switchgear.

A mechanism for fixing and blocking withdrawable parts of cells of complete distribution devices is known, which contains an oil switch on a carriage with a displacement shaft driven in rotation through a worm gearbox.

In the proposed mechanism, a spring loaded clutch is mounted on a displacement shaft adjacent to a worm gear, which is moved along the shaft by a tilting fork with a lock that passes freely through the worm gear. In the switch case there are three holes for the retainer corresponding to the repair, test and operating positions of the oil switch shaft, and a cam is mounted on the switch shaft of the latter against the coupling fork, with the oil switch turned on, preventing the fork from rolling, where the system is located acting on the switching body of the oil switch and blocking the release of the lock from the opening in the housing. Such a design of the mechanism makes it possible to increase the reliability of fixation and to simplify the locking.

FIG. I and 2 depict the proposed mechanism in two projections and view along arrow A. A worm wheel is mounted on the shaft 1 of the movements of the oil switch on the pin 2. The displacement shaft is supported in a fixed casing 3 and a bracket 4. The worm gear 5 is in engagement with the screw 6, rotated by the handle 7. On the same shaft 1 there is a free coupling 8, controlled by the rocking yoke 9 by means of the handle 10 In the coupling 8, a retainer 11 is fixed, which freely passes through the opening 12 in the worm gear 5. In the case 3 there are three openings 13 for the retainer 11. Their location corresponds to the working, control and repair pointendor of the displacement shaft and, therefore, withdrawable parts in whole The coupling 8 is constantly clamped to the worm wheel 5 by a spring 14. A lock that does not allow movement

carriage with the oil switch on, carried out by the cam 15, sitting on the shaft 16 of the latter. The cam 15 goes so close to the plug 9 that it does not give her the opportunity to swing and pull

the coupling 8 from the worm gear 5 and thereby withdraw the retainer 11 from the hole 13.

The blocking preventing the switch of the oil switch between the control and the working position of the withdrawable parts is carried out by the system of the tg 17 placed on

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the plug 9 in such a way that in the first position of the coupling 8, when the latch 1 goes outside the holes 13, the system of pulling 17 does not allow the switching of the switching element 18 of the oil switch.

The device works as follows.

The oil switch is turned off to move the withdrawable parts from one position to another. The shaft 16 rotates and retracts the cam 15 from the fork 9. The fork 9 is rocked by the handle 10, the sleeve 8 is retracted to the right. In this case, the latch 11 exits the hole 13, remaining in the hole 12, and the system tg 17 moves to the right and blocks the movement of the closing body 18 of the oil switch. (Organ 18 may, for example, be a spring pawl or a button for electromagnetic oil switches). Then the handle 7 through the worm to 6 and the worm gear 5 causes the movement of the shaft 1 of movement, which moves the withdrawable part to a new position. In this case, due to the retainer 11, the clutch 8 also rotates. When the displacement shaft 1 reaches a predetermined position, the retainer 11 enters the corresponding hole 13 under the action of the spring 14, which moves the clutch 8 to the left. The plug 9 assumes the initial position by chopping the system 17 and the switching-on unit 18 is released. Then, if the new position of the withdrawable parts is working, turn on the oil switch.

its shaft 16 is rotated, the cam 15 is carried along, and the latter locks the fork 9 from the rocker until the oil switch is turned on.

Subject invention

The mechanism for fixing and blocking the outgoing parts of the cells of complete switchgears containing an oil switch on a carriage with a displacement shaft driven in rotation through a worm gearbox, characterized in that, in order to increase the reliability of fixation and

to simplify the locking, on the displacement shaft, next to the worm gear, a spring-loaded clutch is mounted, moved along the shaft by a rocking fork with a lock, passing freely through the worm gear, with

In the switch body, there are three holes for the lock, corresponding to the repair, test and operating positions of the shaft of the oil switch movements, and on the switch-on shaft of the oil switch against

the clutch forks are mounted on the cam; when the oil switch is on, it prevents the fork from oscillating, which contains a system of tg, acting on the oil circuit breaker, preventing it

included when the latch, released from the hole in the housing.

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