CN102768911A - Switchgear grounding switch and lower door interlocking mechanism - Google Patents

Abstract

The invention relates to a switch cabinet part structure, and in particular relates to a switch cabinet grounding switch and lower door interlocking mechanism. The mechanism comprises a cabinet body, wherein a grounding switch is arranged in the middle of the cabinet body; the lower part of the cabinet body is provided with a fuse chamber; the front end of the fuse chamber is provided with a lower door; the front end of an operating shaft of the grounding switch is a shaft head which can be inserted and matched with the operating handle; an interlocking disc which can rotate along the shaft head is connected to the shaft head; a connecting rod is hinged to the edge of the interlocking disc; the lower end of the connecting rod is hinged with a lock pin; the lock pin can be driven to vertically move on a guide seat through the connecting rod due to rotation of the interlocking disc; and when the lower door is in a closed state, the lock pin moves up and down and can be inserted out of or into a locking hole in a top frame of the lower door. The switch cabinet grounding switch and lower door interlocking mechanism is simple in structure, fewer in transmission links, convenient to mount and debug and high in action reliability.

Description

Switchgear grounding switch and lower door interlocking mechanism

technical field

The invention relates to a component structure of a switch cabinet, in particular to an interlocking mechanism of a ground switch and a lower door of a switch cabinet.

Background technique

A fuse room closed by a lower door is usually provided at the lower part of the cabinet of an ordinary switchgear for installing protective components such as fuses. When overhauling the components in the fuse room, on the one hand, it is necessary to operate the grounding switch installed in the middle of the cabinet to the grounding position to ensure the safety of the maintenance process, that is, it is not allowed to open the lower door when the grounding switch is not in the grounding position. Maintenance; on the other hand, it is not allowed to operate the grounding switch when the maintenance is not completed and the lower door is closed, so as to ensure the safety of the maintenance personnel. The above-mentioned safety regulations usually need to be guaranteed by an interlock mechanism between the grounding switch and the lower door. Most of the existing interlock mechanisms have defects such as complex structure, inconvenient operation, and poor interlock reliability, and cannot meet high safety operation requirements.

Contents of the invention

The technical problem to be solved by the present invention is to provide an interlocking mechanism of the grounding switch and the lower door of the switchgear with simple structure, convenient operation and reliable interlocking.

The switch cabinet grounding switch and lower door interlocking mechanism of the present invention comprises a switch cabinet cabinet body, a grounding switch is installed in the middle of the cabinet body, a fuse chamber is arranged at the lower part of the cabinet body, and a lower door is arranged at the front end of the fuse chamber; the grounding switch The operating shaft is set horizontally and vertically, and the front end of the operating shaft is a shaft head that can be plugged and matched with the operating handle; the shaft head is located above the top frame of the lower door, and an interlocking disc that can rotate with the shaft head is connected to the shaft head , the edge of the interlocking disk is hinged with a connecting rod, and the lower end of the connecting rod is hinged with a locking pin; Vertical movement on the guide seat; when the grounding switch operating shaft rotates to the grounding or isolation position, it drives the lock pin to move up or down respectively; when the lower door is closed, the upward and downward movement of the lock pin can be pulled out or inserted into the top frame of the lower door on the keyhole.

An interlocking plate is arranged in front of the shaft head of the operating shaft, the middle part of the interlocking plate is hinged on the cabinet body and can swing left and right, and the upper part of the interlocking plate can block or open the handle insertion position directly in front of the shaft head during the swing process; A spring is arranged between the interlocking plate and the cabinet body. When the lower door is opened, the spring force causes the interlocking plate to swing to the position directly in front of the blocking shaft head; a guide inclined surface is arranged on the inner side of the top frame of the lower door, and the lower door is closed. At this time, the guide inclined surface can drive the lower section of the interlocking plate, so that the interlocking plate can swing to the position directly in front of the opening shaft head.

The invention has the advantages of simple structure, few transmission links, convenient installation and debugging, and high action reliability.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2 is a schematic structural view of the inner side of the lower door.

Detailed ways

As shown in the figure, the interlock mechanism between the grounding switch and the lower door of the switchgear includes a cabinet body 1 of the switchgear body, a grounding switch is installed in the middle of the cabinet body, a fuse room is arranged at the lower part of the cabinet body, and a lower door 2 is arranged at the front end of the fuse room The operating shaft 3 of the grounding switch is arranged vertically and horizontally, and the front end of the operating shaft is a shaft head 4 that can be plugged and matched with the operating handle; the shaft head is located above the top frame of the lower door 2, and the shaft head 4 is connected to a The interlocking disc 5 that can rotate with the shaft head has a connecting rod 6 hinged on the edge of the interlocking disc, and the lower end of the connecting rod 6 is hinged with a lock pin 7; the lock pin 7 is vertically inserted into a guide hole on a guide seat 8 Among them, the rotation of the interlocking plate 5 can drive the locking pin 7 to move vertically on the guide seat 8 through the connecting rod 6; when the operating shaft 3 of the grounding switch is rotated to the grounding or isolation position, it drives the locking pin 7 to move up or down; When the lower door 2 was in the closed state, the up and down movement of the lock pin 7 could be extracted or inserted into the lock hole 9 on the top frame of the lower door 2 to realize unlocking or locking of the lower door. That is, when the grounding switch is operated to the isolation position, the lock pin moves down, locking the lower door and cannot be opened; only when the grounding switch is operated to the grounding position, the lock pin moves up and the lower door is unlocked, can the lower door be opened.

An interlocking plate 10 is arranged in front of the shaft head 4 of the operating shaft 3. The middle part of the interlocking plate 10 is hinged on the cabinet body 1 and can swing left and right. Handle insertion position; a spring 11 is arranged between the interlocking plate 10 and the cabinet body 1. When the lower door 2 is opened, the spring force makes the interlocking plate 10 swing to the position directly in front of the blocking shaft head, that is, when the lower door is opened, the shaft head is The front handle insertion position is blocked, and the handle cannot be inserted to operate the grounding switch; a guide slope 12 (as shown in Figure 2) is provided on the inner side of the top frame of the lower door 2, and the guide slope 12 can drive the joint when the lower door 2 is closed. Locking plate 10 lower sections, make interlocking plate swing to open the position directly in front of shaft head, when promptly lower door is closed, just can handle be inserted shaft head and grounding switch is operated.

Claims (2)

1. A switch cabinet ground switch and lower door interlocking mechanism, including a switch cabinet cabinet (1), a ground switch is installed in the middle of the cabinet, a fuse room is installed in the lower part of the cabinet, and a lower door is installed in the front end of the fuse room (2); the operating shaft (3) of the grounding switch is arranged horizontally and vertically, and the front end of the operating shaft is a shaft head (4) that can be plugged and matched with the operating handle; the feature is that the shaft head (4) is located at the bottom Above the top frame of the door (2), an interlocking disc (5) that can rotate with the shaft head is connected to the shaft head (4), and a connecting rod (6) is hinged on the edge of the interlocking disc, and the lower end of the connecting rod (6) Hinged with a lock pin (7); the lock pin (7) is vertically inserted into a guide hole on a guide seat (8), and the rotation of the interlock disc (5) can drive the lock pin through the connecting rod (6) (7) Move vertically on the guide seat (8); when the operating shaft (3) of the grounding switch is rotated to the grounding or isolation position, it drives the lock pin (7) to move up or down; the lower door (2) is in a closed state When the lock pin (7) moves up and down, it can be extracted or inserted into the lock hole (9) on the top frame of the lower door (2). 2. The interlocking mechanism between the grounding switch and the lower door of the switch cabinet according to claim 1, characterized in that: an interlocking plate (10) is arranged in front of the shaft head (4) of the operating shaft (3), and the interlocking plate ( 10) The middle part is hinged on the cabinet body (1) and can swing left and right. The upper part of the interlocking plate (10) can block or open the insertion position of the handle directly in front of the shaft head during the swing process; the interlocking plate (10) and the cabinet body ( 1) There is a spring (11) between them. When the lower door (2) is opened, the spring force makes the interlocking plate (10) swing to the position directly in front of the blocking shaft head; there is a guide slope on the inner side of the top frame of the lower door (2) (12), when the lower door (2) is closed, the guide inclined surface (12) can drive the lower section of the interlocking plate (10), so that the interlocking plate swings to the position directly in front of the opening shaft head.

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