CN103227062A - Interlocking mechanism for ground switch and front lower door of medium-voltage switch cabinet - Google Patents

Abstract

The invention discloses an interlocking mechanism between a grounding switch and a front lower door of a medium-voltage switch cabinet. It includes a grounding switch shaft, a door interlocking piece is arranged inside the door body frame, a grounding switch sleeve is fixedly installed on the grounding switch shaft, and the bump on the grounding switch sleeve is facing the groove position of the door interlocking piece; There is a retaining ring on the shaft of the grounding switch on the shaft of the switch, and a deadbolt of the grounding switch is hinged below the retaining ring on the shaft of the grounding switch. On the button operation shaft, the end of the button operation shaft on the door leans against the lower end of the grounding switch dead bolt. After adopting the above structure, when the grounding switch is opened and the circuit breaker is in the working position, the front and lower doors should not be opened; only after pressing the button on the door to operate the shaft, the grounding switch can be closed. After the grounding switch is closed The front and lower doors can only be opened, ensuring the safety of operators and avoiding dangerous accidents.

Description

Interlocking mechanism of earthing switch and front lower door of medium voltage switchgear

the

technical field

The present invention relates to an interlocking mechanism between a grounding switch and the front lower door in a medium-voltage complete set of equipment, specifically an interlocking mechanism between the grounding switch and the front lower door of a medium-voltage switchgear.

Background technique

The grounding switch of the medium voltage switchgear in the existing medium voltage complete set does not have any interlocking mechanism with the front lower door, so when the grounding switch is in the open state, the front lower door of the switchgear can be opened; when the circuit breaker is in the working position, the grounding The switch operating handle can be operated, which may easily cause damage to the grounding switch, and may also cause accidents.

Contents of the invention

The technical problem to be solved by the present invention is to provide an interlock between the grounding switch of the medium voltage switchgear and the front lower door when the grounding switch is opened and the circuit breaker is in the working position, so that the front lower door cannot be opened so as to ensure the safety of operators. mechanism.

In order to solve the above-mentioned technical problems, the interlocking mechanism between the grounding switch and the front lower door of the medium voltage switchgear of the present invention includes a grounding switch shaft arranged in the front lower door and located on one side of the door frame. The lower door is fixedly connected to the interlocking piece on the door, and a grounding switch sleeve that can rotate with the shaft of the grounding switch is fixedly installed on the shaft of the grounding switch. Under the rotation of the grounding switch shaft, it is placed in or out of the groove of the interlocking piece on the door; the grounding switch shaft is also provided with a grounding switch shaft retaining ring located inside the grounding switch shaft sleeve, and the grounding switch shaft upper retaining ring There is a grounding switch deadbolt hinged at the bottom through a pivot pin, and the upper end of the grounding switch deadbolt is provided with a snap-in end adapted to the notch of the retaining ring on the grounding switch shaft, and the front of the grounding switch deadbolt is provided with a The button operating shaft on the door outside the body, the end of the button operating shaft on the door is pressed against the lower end of the earthing switch deadbolt and can make the earthing switch deadbolt enter or withdraw from the notch of the retaining ring on the earthing switch shaft.

The button operation shaft on the door is provided with a lock hole located outside the outer body of the front lower door.

After adopting the above-mentioned structure, due to the earthing switch shaft sleeve and the retaining ring on the earthing switch shaft arranged on the earthing switch shaft, and the interlocking parts on the door arranged on the inner side of the door body frame; The lock tongue of the switch is thus set, and the projection on the sleeve of the ground switch can be directly facing the interlocking part on the door through the bushing of the grounding switch, the retaining ring on the shaft of the grounding switch and the button operation shaft on the door that drives the action of the deadbolt of the grounding switch. The position of the groove can be placed in or out of the groove of the interlocking piece on the door under the rotation of the grounding switch shaft, thus realizing that when the grounding switch is off and the circuit breaker is in the working position, the front and lower doors should not be opened ; Only when the circuit breaker returns to the test position, the grounding switch can be closed after the button on the door is pressed to operate the shaft, and the front and lower doors can be opened after the grounding switch is closed, thus ensuring the safety of the operator and avoiding danger Accidents happen.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the opening state in the present invention;

Fig. 2 is a schematic diagram of the closing state structure in the present invention;

Fig. 3 is a schematic structural diagram of the installation state in the present invention.

Detailed ways

The interlocking mechanism between the grounding switch and the front and lower doors of the medium-voltage switchgear of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

As shown in the figure, the interlock mechanism between the grounding switch and the front lower door of the medium-voltage switchgear of the present invention includes a grounding switch support 2 fixedly connected to the door frame 1, and a grounding switch rotating shaft 3 is installed on the grounding switch support 2 , the inner side of the door body frame 1 is provided with an upper door interlock 5 fixedly connected with the front lower door 4, a grounding switch shaft sleeve 6 that can rotate with the grounding switch shaft is fixedly installed on the grounding switch shaft 3, and the grounding switch shaft sleeve 6 The bump 7 is facing the groove position of the interlocking piece on the door and can be placed in or away from the groove 8 of the interlocking piece on the door under the rotation of the grounding switch shaft; the grounding switch shaft 3 is also provided with a grounding switch On the inner side of the bushing 6, there is a retaining ring 9 on the shaft of the grounding switch. The bottom of the retaining ring 9 on the shaft of the grounding switch is hinged with a locking tongue 11 of the grounding switch through a shaft pin 10. The upper end of the locking tongue 11 of the grounding switch is provided with a retaining ring on the shaft of the grounding switch. The notch of 9 is adapted to the snap-in end, and the front of the grounding switch deadbolt 11 is provided with a button operating shaft 12 on the door extending out of the front lower door body, and the end of the button operating shaft 12 on the door is pressed against the deadbolt of the grounding switch. The lower end of 11 and can make grounding switch dead bolt 11 enter or withdraw from the notch of retaining ring 9 on the grounding switch shaft.

Further can be provided with a lockhole 13 that is positioned at the outer body of front lower door door on the button operation shaft on the door, this lockhole can be used for padlock, therefore can effectively prevent other people from operating the grounding switch by mistake.

It works as follows:

The interlocking mechanism of the grounding switch is adjusted and the door is closed. When the switch is closed, the engaging end of the locking tongue 11 of the grounding switch just falls into the notch of the retaining ring 9 on the shaft of the grounding switch. Therefore, before operating the grounding switch, you first need to press The button operation shaft on the lower door presses the grounding switch deadbolt 11 through the button operation shaft on the door. At this time, the grounding switch deadbolt 11 is tilted up after rotating around the shaft pin, just to let the edge height of the retaining ring 9 on the grounding switch shaft, Earthing switch rotating shaft 3 just can rotate.

When the grounding switch is turned from closing to opening, the grounding switch sleeve 6 rotates through the same angle with the grounding switch shaft 3, and the bump on the grounding switch sleeve 6 is just stuck in the groove of the interlocking piece 5 on the door. , because the interlocking part 5 on the door is fixed on the front lower door 4, so the front lower door just cannot be opened.

When the circuit breaker returns to the test position and the grounding switch can be operated, when the grounding switch rotates from opening to closing, the grounding switch sleeve 6 rotates through the same angle with the grounding switch shaft 3, and the bump on the grounding switch sleeve 6 Just let the groove of interlocking part 5 on the door open, because interlocking part 5 on the door is fixed on the front lower door 4, so the front lower door just can be opened.

Claims (2)

1. Medium Voltage Switchgear earthed switch and preceding Xiamen interlocking device, it is characterized in that: comprise the earthed switch rotating shaft (3) that is arranged in the preceding Xiamen (4) and is positioned at a body framework (1) one side, described door body framework (1) inboard also is provided with the door of fixedlying connected with preceding Xiamen (4) and goes up locking part (5), the earthed switch axle sleeve (6) that one of fixed installation can be rotated with the earthed switch rotating shaft is gone up in described earthed switch rotating shaft (3), and the groove location of the locking part on the door of the projection (7) on the earthed switch axle sleeve (6) also can place or leave under the rotation of earthed switch rotating shaft in the groove (8) of locking part on the door; Also be provided with one in the described earthed switch rotating shaft (3) and be positioned at back-up ring (9) on the inboard earthed switch axle of earthed switch axle sleeve (6), the below of back-up ring on the earthed switch axle (9) is hinged with an earthed switch dead bolt (11) by pivot pin (10), described earthed switch dead bolt (11) upper end be provided with the earthed switch axle on the fastening end that adapts of the notch of back-up ring (9), the place ahead of described earthed switch dead bolt (11) is provided with one and stretches out upward push-botton operation axle (12) of the external door of preceding every down, and the described door upward end of push-botton operation axle (12) is pressed over the lower end of earthed switch dead bolt (11) and can makes earthed switch dead bolt (11) enter or withdraw from the notch of back-up ring on the earthed switch axle (9).

2. according to described Medium Voltage Switchgear earthed switch of claim 1 and preceding Xiamen interlocking device, described door go up the push-botton operation axle be provided with one be positioned at before the external lockhole (13) of every down.

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