CN103227430B - Interlocking mechanism for door closing operation of switch cabinet - Google Patents

Abstract

The invention discloses an interlocking mechanism for door closing operation of a switch cabinet. The interlocking mechanism comprises a middle door cabinet body and a handcart platform, wherein a middle door lock is arranged on the middle door cabinet body and connected with a middle door interlocking support piece by a door lock connecting rod; a lead screw unlocking plate is arranged at the lower end of the middle door interlocking support piece; a fixing frame is arranged below the lead screw unlocking plate; a limiting rod is mounted on the fixing frame in a penetrating manner; the top end of the limiting rod is over against a limiting hole of a lead screw nut; a lower shifting block is arranged below the lead screw unlocking plate and connected with an upper shifting block; a shifting lever of the upper shifting block is positioned in a dead slot of the lead screw unlocking plate; a spring limiting pin is arranged on the limiting rod; and a spring is mounted on the limiting rod. With the adoption of the structure, when a switch cabinet handcart is pushed into the cabinet, a middle door is required to be closed, and then the handcart can be rocked from a testing position to a working position. The mechanism is simple in structure and good in reliability, eliminates potential safety hazards and ensures personal safety of an operator.

Description

Switch cabinet door closing operation interlocking mechanism

technical field

The invention relates to an interlocking mechanism used for door closing operation in a medium-voltage complete set of equipment, in particular to an interlocking mechanism for door closing operation of a switch cabinet.

Background technique

As we all know, when the door of the switch cabinet in the medium-voltage complete set of equipment is not closed, the handcart can also be shaken to the working position, which will easily cause irregular and unsafe on-site operations. In order to ensure the personal safety of the operators, the switch The interlocking mechanism for closing the door is set on the cabinet, but the existing interlocking mechanism for closing the door, due to the unreasonable structure setting, makes the overall size larger, the structure is complicated, and the reliability is poor, so there is still a relatively large safety hazard, which greatly endanger the personal safety of the operator.

Contents of the invention

The technical problem to be solved by the present invention is to provide a door-closing interlocking mechanism with simple structure and high reliability.

In order to solve the above-mentioned technical problems, the door-closing interlocking mechanism of the switch cabinet of the present invention comprises a middle door cabinet body and a handcart platform arranged below the middle door cabinet body, the middle door cabinet body is provided with a middle door lock, and the middle door door The lock is connected to a middle door interlocking support through a door lock connecting rod. There is a lead screw unlocking plate with an empty slot at the lower end of the middle door interlocking support. The fixed frame is equipped with a limit rod perpendicular to the screw driven by the handcart. The top of the limit rod is facing the limit hole of the screw nut. On the lower shifting block on the limit rod, an upper shifting block is connected to the lower shifting block. The shifting rod of the upper shifting block is located in the empty groove of the lead screw unlocking plate. The spring limiting pin, the spring is installed on the limiting rod and is located between the spring limiting pin and the fixed frame.

After adopting the above-mentioned structure, due to the set limit rod facing the limit hole of the lead screw nut, the limit rod is provided with a shift block that can be driven by the lead screw unlocking plate, so that it can be unlocked through the lead screw unlocking plate, At the same time, the limit rod is provided with a spring between the spring limit pin and the fixed frame, so that the limit rod can be inserted into the limit hole of the screw nut, and the screw cannot be rotated, so as to achieve the limit function of the handcart. This realizes that when the handcart of the switch cabinet is pushed into the cabinet, the middle door must be closed (door lock locked) before the handcart can be shaken from the test position to the working position (that is, only the handcart can be moved when the door is open. It can be moved out of the cabinet, but cannot be shaken to the working position), its structure is simple, and its reliability is good, which eliminates potential safety hazards and ensures the personal safety of operators.

Description of drawings

Fig. 1 is the front structural schematic diagram of the door closing operation interlocking mechanism of the switchgear of the present invention;

Fig. 2 is a top view structural schematic diagram of the door closing operation interlocking mechanism of the switch cabinet of the present invention;

Fig. 3 is a schematic structural view of the locked state of the stop rod and the lead screw nut in the present invention;

Fig. 4 is a structural schematic diagram of the unlocked state of the limit rod and the lead screw nut in the present invention.

Detailed ways

The door-closing interlocking mechanism of the switchgear of the present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments.

As shown in the figure, the door-closing interlocking mechanism of the switch cabinet of the present invention includes a middle door cabinet body 1 and a handcart platform 2 arranged below the middle door cabinet body 1, and a middle door lock 3 is arranged on the middle door cabinet body 1 , the middle door lock 3 is connected to a middle door interlocking support 5 arranged vertically on the middle door cabinet body 1 through a door lock connecting rod 4, and the lower end of the middle door interlocking support 5 is provided with a The lead screw unlocking plate 8 of 7 is provided with a fixed frame 9 located in the handcart platform 2 below the lead screw unlocking plate 8, and a limit rod vertically arranged with the handcart driving screw 10 is worn on the fixed frame 9 11. The top of the limit rod 11 is facing the limit hole of the lead screw nut 12. Below the lead screw unlocking plate 8, there is a lower dial 13 installed on the limit rod 11. The lower dial 13 is connected with a On the dial 14, the driving rod of the upper dial 14 is located in the empty groove 7 of the lead screw unlocking plate 8, and the limit rod 11 is provided with a spring limit pin 15 positioned at the front of the lower dial 13, and the spring 16 is installed in the limit. On the position rod 11 and between the spring limit pin 15 and the fixed frame 9 .

Further, in order to ensure the stability of the middle door interlocking support 5, there is a guide rod 6 arranged horizontally on the middle door cabinet body 1, and the middle door interlocking support 5 is worn on the guide rod 6 and can be mounted on the door lock connecting rod. 4 is driven to move left and right along the guide rod 6, so that the middle door interlock support 5 can move left and right under the guidance of the guide rod 6.

The door closing operation interlock mechanism of the present invention is inserted into the limit hole of the lead screw nut through the limit rod, so that the lead screw cannot be rotated, thereby achieving the handcart limit function, and its working principle is as follows:

Door open state: the handcart is in the test position, the spring limit pin compresses the return spring, the limit rod is inserted into the limit hole of the lead screw nut under the action of the return spring, the lead screw nut is locked, that is, the handcart is locked in test location.

Closed (door locked) state: the middle door interlocking support moves to the left under the drive of the door lock link, the lead screw unlocking plate moves with the middle door interlocking support, and the lead screw unlocking plate moves the upper block to the left Movement, because the lower end of the upper dial is connected with the lower dial, the lower dial is connected with the limit rod through a pin, the upper dial moves to the left and the limit rod moves to the right, so that the limit rod moves from the screw nut Disengaged, the lead screw nut is unlocked, and the handcart can be driven from the test position to the working position at this time.

Claims (2)

1. A switch cabinet door closing operation interlocking mechanism, comprising a middle door cabinet body (1) and a handcart platform (2) arranged below the middle door cabinet body (1), characterized in that: the middle door cabinet body ( 1) There is a middle door lock (3) on the top, and the middle door lock (3) is connected to a middle door interlocking support (5) through a door lock connecting rod (4), and the middle door interlocking support (5) ) is provided with a lead screw unlocking plate (8) with an empty slot (7) at the lower end, and a fixed frame (9) located in the handcart platform (2) is arranged under the lead screw unlocking plate (8). The fixed frame ( 9) Install a limit rod (11) perpendicular to the lead screw (10) driven by the handcart, and the top of the limit rod (11) is facing the limit hole of the lead screw nut (12). The bottom of the lead screw unlocking plate (8) is provided with a lower shifting block (13) installed on the limit rod (11), and an upper shifting block (14) is connected to the lower shifting block (13), and the upper shifting block ( 14) The lever is located in the empty slot (7) of the lead screw unlocking plate (8), and the limit lever (11) is provided with a spring limit pin (15) located in front of the lower shift block (13), The spring (16) is installed on the limit rod (11) and is located between the spring limit pin (15) and the fixed frame (9). 2. The door closing operation interlocking mechanism of the switch cabinet according to claim 1, characterized in that: there is a guide rod (6) arranged horizontally on the middle door cabinet body (1), and the middle door interlocking support (5) It is installed on the guide rod (6) and can move left and right along the guide rod (6) under the drive of the door lock link (4).